CN114864115A - Containment leakage rate measurement test system - Google Patents

Abstract

The invention discloses a containment leakage rate measurement test system which comprises an air inlet pipeline, a data acquisition and processing device and a constant pressure control assembly, wherein the air inlet pipeline is communicated with a containment and used for introducing gas; the data acquisition and processing device is electrically connected with the constant pressure control assembly and used for acquiring a real-time pressure value in the containment and transmitting the real-time pressure value to the constant pressure control assembly, the constant pressure control assembly is arranged on the air inlet pipeline and used for controlling a flow value of gas introduced into the containment so as to maintain the real-time pressure value in the containment equal to the test pressure value, and the data acquisition and processing device is also used for acquiring a flow value of the gas required to be introduced into the containment and used for maintaining the real-time pressure value in the containment equal to the test pressure value, a temperature value and/or a humidity value in the containment and calculating the containment leakage rate. The containment leakage rate measuring test can be realized under the condition that the pressure in the containment is kept constant, the influence of pressure change is avoided, and the containment leakage rate measuring test is small in deviation and more accurate.

Description

Containment leakage rate measurement test system

Technical Field

The invention belongs to the technical field of nuclear engineering, and particularly relates to a containment leakage rate measurement test system.

Background

The containment is the last physical barrier for ensuring the safety of the nuclear power plant, and in the nuclear power plant, the containment integral test, namely the containment pressurization test, is the test of the construction quality of the containment. The rigidness of the whole test process of the containment, the accuracy of the test result and the effectiveness of data analysis are important indexes for ensuring the safe and stable operation of the nuclear power plant.

The containment leakage quantity measurement test is an indispensable ring in the containment integral test, at present, the containment leakage rate measurement test adopts the traditional pressure drop method, the principle is that the mass change of the dry air in the containment vessel at two moments is calculated, the humidity change in the test process easily causes large test result deviation, and in addition, because the upstream gas source must be isolated during the test, and the gas in the containment vessel continuously leaks to the outside, the pressure in the containment vessel theoretically drops gradually, therefore, the initial pressure in the containment vessel must be higher than the designed pressure platform for a certain interval to ensure that the pressure in the containment vessel is not lower than the designed test pressure at the end of the test, for the occasion with large leakage rate, the pressure can be reduced in an accelerated way, the reserved interval is larger, the measured data and the actual value have larger deviation easily, namely, the leakage rate can be influenced by the pressure change. In addition, the pressure drop method has a complex calculation process, and is not easy to realize real-time display of the leakage rate.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides a containment leakage rate measurement test system which can realize a containment leakage rate measurement test under the condition of keeping the pressure in a containment constant, is not influenced by pressure change, has small deviation and is more accurate.

The technical scheme for solving the technical problems is as follows:

the invention provides a containment leakage rate measurement test system which comprises an air inlet pipeline, a data acquisition and processing device and a constant pressure control assembly, wherein:

the gas inlet pipeline is communicated with the containment and is used for introducing gas into the containment;

the data acquisition and processing device is electrically connected with the constant pressure control assembly and is used for acquiring a real-time pressure value in the containment vessel and transmitting the real-time pressure value to the constant pressure control assembly, the constant pressure control assembly is arranged on the air inlet pipeline, the pressure sensor is used for receiving the real-time pressure value, comparing the real-time pressure value with a preset test pressure value in the containment vessel, adjusting the opening of the air inlet pipeline according to a comparison result to control the flow value of the gas introduced into the containment vessel, so as to maintain the real-time pressure value in the containment equal to the test pressure value, the data acquisition and processing device is also used for acquiring the flow value of the gas required to be introduced into the containment and the temperature value and/or the humidity value in the containment, which are required for maintaining the real-time pressure value in the containment equal to the test pressure value, and calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value.

Preferably, the data acquisition and processing device comprises a detector and a data processing terminal, wherein the detector comprises a first pressure gauge, a first flow meter, and a temperature sensor and/or a humidity sensor, and the data acquisition and processing device comprises: the first pressure gauge is arranged in the containment vessel, is respectively and electrically connected with the data processing terminal and the constant pressure control assembly, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel and transmit the real-time pressure value to the data processing terminal and the constant pressure control assembly; the first flowmeter is arranged on the gas inlet pipeline, is electrically connected with the data processing terminal, and is used for detecting the gas flow in the gas inlet pipeline so as to acquire and obtain a flow value of the gas and transmit the flow value to the data processing terminal; the temperature sensor is arranged in the containment vessel, is electrically connected with the data processing terminal, and is used for detecting the real-time temperature in the containment vessel so as to acquire and obtain a temperature value in the containment vessel and transmit the temperature value to the data processing terminal; the humidity sensor is arranged in the containment vessel, is electrically connected with the data processing terminal, and is used for detecting the real-time humidity in the containment vessel so as to acquire and obtain a humidity value in the containment vessel and transmit the humidity value to the data processing terminal; and the data processing terminal is used for calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value.

Preferably, the number of the temperature sensors is multiple, and the multiple temperature sensors are respectively arranged at different positions in the containment vessel, so that the internal space of the containment vessel is divided into multiple virtual temperature partitions to acquire temperature values of different temperature partitions in the containment vessel; the number of the humidity sensors is multiple, the humidity sensors are respectively arranged at different positions in the containment vessel, so that the internal space of the containment vessel is divided into a plurality of virtual humidity partitions, and humidity values of different humidity partitions in the containment vessel are acquired.

Preferably, the data processing terminal includes a first calculating module, a second calculating module, and a third calculating module, wherein: the first calculation module is electrically connected with the first flowmeter and used for calculating the measurement volume leakage rate according to the flow value of the gas; the second calculation module is electrically connected with the temperature sensor and/or the humidity sensor and is used for calculating a compensation volume leakage rate according to the temperature value and/or the humidity value; the third calculation module is electrically connected with the first calculation module and the second calculation module respectively and used for calculating the actual volume leakage rate according to the measured volume leakage rate and the compensated volume leakage rate and calculating the mass leakage rate according to the actual volume leakage rate so as to obtain the containment leakage rate.

Preferably, the first calculation module stores the measured volume leakage rate L under the standard working condition environment _{Measuring, N sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measure, P ∑ i} Showing the test condition at t _i Cumulative measured volume leakage rate, P, for all zones at that time ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

represents t _i-1 To t _i The effective specific temperature within the containment during the time period,

and/or the measured volume leakage rate L under the standard working condition environment _{Measuring, N sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time _Ai Representing the real-time pressure, P, at the first flow meter in the supplied air environment _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

and/or, the first meterThe calculation module stores the measured volume leakage rate L under the test working condition environment _{Measuring, p sigma} The calculation formula (2) is specifically as follows:

wherein L is _{Measure, P ∑ i} Showing the test condition at t _i The cumulative measured volumetric leak rate for all zones at that time.

Preferably, the second calculation module calculates the compensated volume leakage rate according to the temperature value and/or the humidity value, specifically, the compensated volume leakage rate is obtained by respectively calculating and accumulating temperature values and humidity values of each partition in the containment at different moments, and the compensated volume leakage rate L in the test working condition environment is stored in the second calculation module _{Complement, P sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time periods or cycles, m represents the number of humidity zones, i represents t _i Time of day or t _i-1 To t _i Time period, j denotes the jth temperature zone or jth humidity zone, k denotes the number of temperature zones, H _ji Denotes the jth humidity zone at t _i Relative humidity of time of day, H _ji-1 Denotes the jth humidity division at t _i-1 Relative humidity at the moment of time, P _Hji Denotes the jth humidity zone at t _i Saturated partial pressure of water vapor at time, P _Hji-1 Denotes the jth humidity zone at t _i-1 Saturated partial pressure of water vapour at time, V _Hj Represents the percentage of the jth humidity zone in the free volume of the containment vessel, V ₀ Representing the free volume of the containment vessel, P ₀ Denotes the test pressure,. DELTA.t denotes t _i-1 To t _i Time length of time, T _ji Denotes the j temperature zone at t _i Absolute temperature at time, T _ji-1 Denotes the jth temperature zone at t _i-1 Absolute temperature of moment, V _Tj Representing the percentage of the jth temperature zone in the free volume of the containment vessel;

and/or the second calculation module is internally stored with a compensation volume leakage rate L under the standard working condition environment _{Complement, N sigma} The calculation formula of (c) is specifically as follows:

wherein n represents the number of time periods or cycles, m represents the number of humidity zones, i represents t _i Time of day or t _i-1 To t _i Time period, j represents the jth temperature zone or jth humidity zone, k represents the number of temperature zones, H _ji Denotes the jth humidity zone at t _i Relative humidity at the moment H _ji-1 Denotes the jth humidity zone at t _i-1 Relative humidity at the moment P _Hji Denotes the jth humidity zone at t _i Saturated partial pressure of water vapor at time, P _Hji-1 Denotes the jth humidity zone at t _i-1 Saturated partial pressure of water vapour at time, V _Hj Represents the percentage of the jth humidity zone in the free volume of the containment vessel, V ₀ Representing the free volume of the containment vessel, P ₀ Denotes the test pressure, P _N Denotes the pressure in the environment of the standard working condition, and Δ t denotes t _i-1 To t _i Time length of time, T _N Indicating the temperature, T, in the environment of the standard operating mode _Hji-1 Denotes the jth humidity zone at t _i-1 Absolute temperature at time, T _Hji Denotes the jth humidity division at t _i Absolute temperature at time, T _ji Denotes the j temperature zone at t _i Absolute temperature at time, T _ji-1 Denotes the j temperature zone at t _i-1 Absolute temperature of moment, V _Tj Represents the percentage of the free volume of the containment vessel in the jth temperature zone.

Preferably, the third calculation module stores the actual volume leakage rate L under the test working condition environment _{Real, P sigma} The calculation formula (2) is specifically as follows:

L _{real, P sigma} ＝L _{Measuring, P sigma} +L _{Complement, P sigma}

And/or the third calculation module is internally stored with the actual volume leakage rate L under the standard working condition environment _{Real, N sigma} The calculation formula (2) is specifically as follows:

L _{real, N sigma} ＝L _{Measuring, N sigma} +L _{Complement, N sigma}

The subscript N represents a standard working condition environment, the subscript P represents a test working condition environment, and the subscript sigma-sigma table accumulates all partitions at all times.

Preferably, the third calculating module further stores a calculation formula of mass leakage rate, and the calculation formula specifically includes:

calculating mass leakage rate M in delta t time under standard working condition environment _∑i The calculation formula (2) is specifically as follows:

wherein L is _{Real, N Σ i} Indicating the standard working condition environment at t _i Cumulative actual volume leakage rate, m, for all zones at that time _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average partial pressure of water vapour at the moment,

denotes t _i-1 The average water vapour partial pressure at the moment,

represents t _i Mean partial pressure of water vapor at the time, R represents the ideal gas constant, P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N Which represents the temperature in the environment of the standard operating condition,

or, calculating mass leakage rate M within one delta t time under the test working condition environment _∑i Is specifically calculated by：

Wherein L is _{True, P Σ i} Showing the test condition at t _i Cumulative actual volume leakage rate, m, for all zones at that time _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average partial pressure of water vapour at the moment,

represents t _i-1 Average water vapor partial pressure at the time, R represents an ideal gas constant, P ₀ Denotes the test pressure, P _N Which represents the pressure in the environment of the standard operating condition,

represents t _i To t _i-1 Effective specific temperature in the containment over a period of time;

calculating the total mass leakage rate M in a plurality of continuous delta t times _∑∑ The calculation formula (2) is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i A time period.

Preferably, the first calculation module stores the measured volume leakage rate L under the standard working condition environment _{Measuring, N ∑ i} The calculation formula (2) is specifically as follows:

wherein i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time _Ai Representing the real-time pressure, P, at the first flow meter in the supplied air environment _N Indicating the pressure, T, in the environment of the standard operating conditions _N Which represents the temperature in the environment of the standard operating condition,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

and/or measuring volume leakage rate L under the environment of test working condition _{Measuring, P sigma i} The calculation formula (2) is specifically as follows:

wherein i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time ₀ Denotes the test pressure, P _Ai Representing the real-time pressure at the first flow meter in the supplied air environment,

represents the average temperature within the case in the test environment,

indicating at t in the environment of the supply of air _i-1 To t _i Effective specific temperature in the containment over a period of time;

the second calculation module calculates the compensation volume leakage rate according to the temperature value and/or the humidity value, specifically, the compensation volume leakage rate is calculated according to the average temperature value and the average humidity value of each subarea in the containment, and the second calculation module calculates the compensation volume leakage rateContainment leakage rate L stored in test working condition environment _{Complement, P ∑ i} The calculation formula (2) is specifically as follows:

wherein the content of the first and second substances,

is shown at t _i The average relative humidity of all the zones at the moment,

is shown at t _i The average saturated water vapor partial pressure of all the partitions at that time,

is shown at t _i-1 The average relative humidity of all the zones at the moment,

is shown at t _i-1 The average saturated water vapor partial pressure of all the partitions at that time,

represents t _i The average temperature at the time of day is,

represents t _i-1 Mean temperature at time, V ₀ Represents the free volume of the containment vessel, Δ t represents t _i-1 To t _i The time length of the moment;

and/or the second calculation module is internally stored with a containment leakage rate L in a standard working condition environment _{Complement, N Σ i} The calculation formula (2) is specifically as follows:

wherein the content of the first and second substances,

is shown at t _i The average relative humidity of all the zones at the moment,

is shown at t _i The average saturated water vapor partial pressure of all the partitions at that time,

is shown at t _i-1 The average relative humidity of all the zones at the moment,

is shown at t _i-1 The average saturated water vapor partial pressure of all the partitions at that time,

represents t _i The average temperature at the time of day is,

represents t _i-1 Mean temperature at time, V ₀ Represents the free volume of the containment vessel, Δ t represents t _i-1 To t _i Time length of time, P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N Indicating the temperature under the environment of standard working conditions;

the third calculation module is internally stored with the actual volume leakage rate L under the standard working condition environment _{Real, N Σ i} The calculation formula (2) is specifically as follows:

L _{real, N Σ i} ＝L _{Measuring, N ∑ i} +L _{Complement, N Σ i}

And/or the third calculation module is internally stored with the actual volume leakage rate L under the test working condition environment _{True, P Σ i} The calculation formula (2) is specifically as follows:

L _{true, P Σ i} ＝L _{Measure, P ∑ i} +L _{Complement, P ∑ i}

The third computing module is also internally stored with the quality leakage under the standard working condition environmentLeak rate M _N∑i The calculation formula (2) is specifically as follows:

wherein m is _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average water vapor partial pressure at the time, R, represents the ideal gas constant;

and/or the third calculation module is also internally stored with a mass leakage rate M under the test working condition environment _P∑i The calculation formula (2) is specifically as follows:

wherein m is _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average water vapor partial pressure at the time, R, represents the ideal gas constant.

Preferably, the data acquisition and processing device comprises a detector and a data processing terminal, wherein the detector comprises a first pressure gauge, a first flow meter, and a temperature sensor and/or a humidity sensor, and the data acquisition and processing device comprises: the first pressure gauge is arranged in the containment vessel, is respectively and electrically connected with the data processing terminal and the constant pressure control assembly, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel and transmit the real-time pressure value to the data processing terminal and the constant pressure control assembly; the first flowmeter is arranged on the gas inlet pipeline, is electrically connected with the data processing terminal, and is used for detecting the gas flow in the gas inlet pipeline so as to acquire and obtain a flow value of the gas and transmit the flow value to the data processing terminal; the containment is divided into a plurality of blocks, the plurality of temperature sensors are respectively arranged at each block of the containment and are electrically connected with the data processing terminal, and the temperature sensors are used for detecting the real-time temperature of each block of the containment so as to acquire and obtain the temperature value of each block of the containment and transmit the temperature value to the data processing terminal; the number of the humidity sensors is multiple, the humidity sensors are respectively arranged at each block of the containment vessel and are electrically connected with the data processing terminal, and the humidity sensors are used for detecting the real-time humidity at each block of the containment vessel so as to acquire and obtain the humidity value at each position of the containment vessel and transmit the humidity value to the data processing terminal; and the data processing terminal is used for calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value.

Preferably, the data processing terminal includes a fourth calculating module and a fifth calculating module, wherein: the fourth calculation module is respectively and electrically connected with the first flowmeter, the temperature sensor and/or the humidity sensor and is used for calculating the t value of each block according to the flow value, the temperature value and/or the humidity value _i To t _i+1 Volumetric leak rate over time; the fifth calculation module is electrically connected with the fourth calculation module and is used for calculating the block length t according to each block _i To t _i+1 Volume leakage rate of time segment is calculated at t for each block _i To t _i+1 And obtaining the containment leakage rate by mass leakage rate of the time period.

Preferably, the fourth calculating module stores the calculation result of each block at t _i To t _i+1 Volume leakage rate of time period

The calculation formula (2) is specifically as follows:

wherein a represents the number of partitions, L _in，i+1 Denotes the t-th _i+1 Filling gas at any timeOf the outlet of the pipeline, T _c，i+1，j Denotes the jth block at t _i+1 Absolute temperature of gas in containment at time, T _c，i，j Denotes the jth block at t _i Absolute temperature of gas in containment vessel at time m _c，i，j Denotes the jth block at t _i Mass of gas in containment vessel at time, R _{g，eq，i，j} Denotes the jth block at t _i Reduced gas constant, P, of the gas in the containment at time _c Representing the pressure of the gas at the outlet/in-containment of the gas-filled line, at representing t _i Time to t _i+1 Time length of time, V _c，i，j Represents the volume corresponding to the jth block, H _c，i+1，j Denotes the jth block at t _i+1 Instantaneous relative humidity in the containment, H _c，i，j Denotes the jth block at t _i Relative humidity in Containment at time, f (T) _c，i+1，j ) Denotes the jth block at t _i+1 Saturated water vapor partial pressure at time f (T) _c，i，j ) Denotes the jth block at t _i+1 The saturated steam partial pressure in the containment vessel at the moment;

the fifth calculation module stores and calculates each block at t _i To t _i+1 Mass leakage rate of time segment G _out，i+1j The calculation formula (2) is specifically as follows:

wherein j represents the jth block, i represents the tth block _i Time of day or t _i To t _i+1 Time period, a denotes the number of blocks, L _in，i+1 Denotes the t-th _i+1 Inflation volume flow, T, at the outlet of the line constantly inflated with gas _c，i+1，j Denotes the jth block at t _i+1 Absolute temperature of gas in containment at time, T _c，i，j Denotes the jth block at t _i Absolute temperature of gas in containment vessel at time m _c，i，j Denotes the jth block at t _i Mass of gas in containment vessel at time, R _{g，eq，i，j} Denotes the jth block at t _i Safety of time of dayReduced gas constant, P, of the gas in the enclosure _c Representing the pressure of the gas at the outlet/in-containment of the gas-filled line, at representing t _i To t _i+1 Time length of time, V _c，i，j Represents the volume corresponding to the jth block, H _c，i+1，j Denotes the jth block at t _i+1 Instantaneous relative humidity in the containment, H _c，i，j Denotes the jth block at t _i Relative humidity in Containment at time, f (T) _c，i+1，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in the containment at time f (T) _c，i，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in containment vessel at time, R _{g，eq，i+1，j} Denotes the jth block at t _i+1 The reduced gas constant of the gas in the containment at the moment.

Preferably, the data acquisition and processing device further comprises a memory, and the first pressure gauge is electrically connected with the data processing terminal through the memory so as to transmit the acquired real-time pressure value to the memory; the first flowmeter is electrically connected with the data processing terminal through the memory so as to transmit the acquired flow value of the gas to the memory; the temperature sensor is electrically connected with the data processing terminal through the memory so as to transmit the acquired temperature value to the memory; the humidity sensor is electrically connected with the data processing terminal through the memory so as to transmit the collected humidity value to the memory; the memory is used for storing and displaying the real-time pressure value transmitted by the first pressure gauge, the flow value of the gas transmitted by the first flow meter, the temperature value transmitted by the temperature sensor and the humidity value transmitted by the humidity sensor and transmitting the real-time pressure value, the flow value of the gas transmitted by the first flow meter, the temperature value transmitted by the temperature sensor and the humidity value transmitted by the humidity sensor to the data processing terminal so as to calculate the containment leakage rate.

Preferably, the constant pressure control assembly comprises a control valve and a controller, and the control valve is arranged on the air inlet pipeline and used for controlling the gas flow in the air inlet pipeline; the controller is electrically connected with the first pressure gauge and the control valve respectively, the test pressure value is arranged in the controller, the controller is used for receiving the real-time pressure value in the containment detected by the first pressure gauge, comparing the real-time pressure value with the test pressure value, and adjusting the opening of the control valve according to the comparison result so as to maintain the real-time pressure value in the containment equal to the test pressure value.

Preferably, the air inlet pipeline comprises a pressurizing pipeline and a constant-pressure testing pipeline, the pressurizing pipeline and the constant-pressure testing pipeline are arranged in parallel, and both the pressurizing pipeline and the constant-pressure testing pipeline are communicated with the containment vessel, wherein: the pressurizing pipeline is used for inflating the containment before the test is started so as to enable the real-time pressure value in the containment to quickly reach the test pressure value, and a first isolating valve is arranged on the pressurizing pipeline and used for controlling the on-off of the pressurizing pipeline so as to inflate the containment; the constant voltage test pipeline is used for tonifying qi in the containment at the experimentation to maintain the real-time pressure value in the containment and equal to experimental pressure value is equipped with the second isolating valve on the constant voltage test pipeline, and the second isolating valve is used for controlling the break-make of constant voltage test pipeline, in order to carry out the tonifying qi, the control valve is located on the constant voltage test pipeline for adjust the gaseous flow of tonifying qi in the constant voltage test pipeline, first flowmeter locates on the constant voltage test pipeline, is used for detecting the gaseous flow value of tonifying qi in the constant voltage test pipeline, in order to obtain maintain the real-time pressure value in the containment equal to the flow value of the gas that experimental pressure value need let in.

Preferably, the detector further comprises a second pressure gauge and a first thermometer, wherein the second pressure gauge is arranged on the constant pressure testing pipeline, is electrically connected with the memory, and is used for detecting the pressure value of the gas in the constant pressure testing pipeline and transmitting the pressure value to the memory for storage and display; the first thermometer is arranged on the constant-pressure testing pipeline, is electrically connected with the memory, and is used for detecting the temperature value in the constant-pressure testing pipeline and transmitting the temperature value to the memory for storage and display; the data processing terminal is used for calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value, and specifically comprises the following steps: and the data processing terminal converts the flow value of the air supply gas in the constant pressure test pipeline into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the constant pressure test pipeline stored in the memory, and then calculates the containment leakage rate according to the flow value under the standard working condition environment or the containment working condition environment, the temperature value and the humidity value.

Preferably, the system further comprises a verification pipeline, wherein a third isolation valve is arranged on the verification pipeline and used for controlling the on-off and the opening degree of the verification pipeline; the detector also comprises a second flowmeter, the second flowmeter is arranged on the verification pipeline, is electrically connected with the data processing terminal through the memory, and is used for detecting the flow value of the gas in the verification pipeline and transmitting the flow value to the memory for storage and display; the data processing terminal is further used for determining a reference leakage rate according to the flow value of the gas in the verification pipeline stored in the memory, recalculating the containment leakage rate on the basis of the superimposed reference leakage rate to obtain the containment leakage rate after the reference leakage is superimposed, calculating a measured leakage rate according to the containment leakage rate before the reference leakage is superimposed and the containment leakage rate after the reference leakage is superimposed, comparing the measured leakage rate with the reference leakage rate, and verifying the accuracy of the measurement result of the system according to the comparison result.

Preferably, the detector further comprises a third pressure gauge and a second temperature gauge, wherein the third pressure gauge is arranged on the verification pipeline, is electrically connected with the memory, and is used for detecting the pressure value of the gas in the verification pipeline and transmitting the pressure value to the memory for storage and display; the second thermometer is arranged on the verification pipeline, is electrically connected with the memory, and is used for detecting the temperature value of the gas in the verification pipeline and transmitting the temperature value to the memory for storage and display; the determining of the reference leakage rate according to the flow value of the gas in the verification pipeline stored in the memory specifically comprises: and the data processing terminal converts the flow value of the gas in the verification pipeline into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the verification pipeline stored in the memory, and then calculates the reference leakage rate according to the flow value of the gas in the verification pipeline under the standard working condition environment or the containment working condition environment.

The containment leakage rate measurement test system provided by the invention can be completed under the condition of maintaining the pressure inside the containment constant by adopting a constant pressure method containment leakage rate measurement technology, continuous inflation is kept in the measurement process to keep the pressure inside the containment constant, and the principle is that a constant pressure method calculation model is established by analyzing real-time volume change, so that the containment leakage rate is determined, and the containment leakage rate measurement test system is completely different from the traditional pressure drop method principle (for analyzing the mass change of dry air in the containment between two moments). Moreover, the system fully focuses on the influence of temperature change and humidity change on containment leakage rate measurement in the measurement process, and can give a proper acquisition period to calculate temperature compensation and humidity compensation by combining the characteristics of continuous change of temperature and humidity, namely, the calculation model of the containment leakage rate in the system analyzes the gas really leaked in the containment.

Drawings

FIG. 1 is a schematic structural diagram of a containment leak rate measurement test system in this embodiment;

FIG. 2 is a diagram illustrating a real-time variation of the temperature in the containment vessel within 24h detected by the containment vessel leakage rate measurement test system in the present embodiment;

FIG. 3 is a diagram illustrating the real-time variation of the humidity in the containment vessel within 24h detected by the containment vessel leakage rate measurement test system in this embodiment;

FIG. 4 is a diagram illustrating a real-time variation of the pressure in the containment vessel within 24 hours detected by the containment vessel leakage rate measurement test system in the present embodiment;

FIG. 5 is a diagram illustrating a real-time variation of the flow rate of the make-up air in the constant pressure test pipeline within 24 hours, which is detected by the containment leakage rate measurement test system in this embodiment;

FIG. 6 is an actual volume leakage rate L within 24h measured by the containment leakage rate measurement test system in this embodiment _{Real, N Σ i} OfA time variation graph;

FIG. 7 is a diagram illustrating a mass leakage rate M within 24h measured by the containment leakage rate measurement test system in this embodiment _∑i Real-time variation diagram of (2).

In the figure: 1-a containment vessel; 2-a memory; 3-a data processing terminal; 4-an air intake line; 5-constant pressure control component; 6-a first flow meter; 7-a second pressure gauge; 8-a first thermometer; 9-a first pressure gauge; 10-a pressurizing pipeline; 11-a first isolation valve; 12-constant pressure test pipeline; 13-a second isolation valve; 14-a temperature sensor; 15-a humidity sensor; 16-validation pipeline; 17-a third isolation valve; 18-a second flow meter; 19-a third pressure gauge; 20-second thermometer.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.

In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the interconnection of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

Example 1

As shown in fig. 1, the embodiment discloses a containment leakage rate measurement test system for measuring a containment leakage rate by a constant pressure method, which includes an air inlet pipeline 4, a data acquisition and processing device, and a constant pressure control assembly 5, wherein:

the air inlet pipeline 4 is communicated with the containment vessel 1 and is used for introducing gas (such as air and compressed air) into the containment vessel;

the data acquisition processing device is electrically connected with the constant pressure control component 5 and is used for acquiring the real-time pressure value in the containment vessel 1, and transmits it to a constant pressure control assembly 5, the constant pressure control assembly 5 is provided on the air intake line 4, is used for receiving the real-time pressure value transmitted by the data acquisition and processing device, comparing the real-time pressure value with a test pressure value preset in the constant pressure control component 5, adjusting the opening degree of the air inlet pipeline 4 according to the comparison result to control the flow value of the gas introduced into the containment 1, so as to maintain the real-time pressure value in the containment vessel equal to the test pressure value, the data acquisition and processing device is also used for acquiring the flow value of the gas required to be introduced into the containment vessel to maintain the real-time pressure value in the containment vessel 1 equal to the test pressure value, and calculating the containment leakage rate according to the flow value data of the gas and the temperature value and/or the humidity value in the containment.

In some embodiments, the data acquisition and processing device comprises a detector, a data processing terminal 3 (e.g. a computer), the detector comprising a first pressure gauge 9, a first flow meter 6, and a temperature sensor 14 and/or a humidity sensor 15, wherein: the first pressure 9 is arranged in the containment vessel 1, is respectively and electrically connected with the data processing terminal 3 and the constant pressure control assembly 5, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel 1 and transmit the real-time pressure value to the data processing terminal 3 and the constant pressure control assembly 5; the first flowmeter 6 is arranged on the air inlet pipeline 4, is electrically connected with the data processing terminal 3, and is used for detecting the gas flow in the air inlet pipeline 4, so as to acquire the flow value of the gas and transmit the flow value to the data processing terminal 3; the temperature sensor 14 is arranged in the containment vessel 1, is electrically connected with the data processing terminal 3, and is used for detecting the real-time temperature in the containment vessel 1 so as to acquire and obtain a temperature value in the containment vessel 1 and transmit the temperature value to the data processing terminal 3; the humidity sensor 15 is arranged in the containment vessel 1, is electrically connected with the data processing terminal 3, and is used for detecting the real-time humidity in the containment vessel 1 so as to acquire and obtain a humidity value in the containment vessel 1 and transmit the humidity value to the data processing terminal 3; and the data processing terminal 3 is used for calculating the containment leakage rate according to the flow value, the temperature value and/or the humidity value of the gas.

In this embodiment, the data processing terminal 3 is configured to calculate the containment leakage rate according to a flow value, a temperature value, and/or a humidity value of the gas, and specifically includes:

firstly, the data processing terminal 3 calculates the measured volume leakage rate according to the flow value of the gas, and under the condition of not considering factors such as temperature, humidity and the like, the measured volume leakage rate can be used as an index for measuring the containment leakage rate;

the data processing terminal 3 calculates a compensation value of the temperature to the containment leakage rate according to the temperature value and/or calculates a compensation value of the humidity to the containment leakage rate according to the humidity value to obtain a compensation volume leakage rate, so as to correct the containment leakage rate, thereby further improving the accuracy of the containment leakage rate;

and thirdly, the data processing terminal 3 calculates the actual volume leakage rate according to the measured volume leakage rate and the compensated volume leakage rate, and calculates the mass leakage rate according to the actual volume leakage rate to obtain the containment leakage rate.

In some embodiments, as shown in fig. 1, the number of the temperature sensors 14 is multiple, the multiple temperature sensors 14 are respectively disposed at different positions in the containment 1, so that the internal space of the containment 1 is divided into multiple virtual temperature partitions (more specifically, for example, a typical area, a room with obstructed gas flow is taken as one partition, and a volume coefficient of each temperature partition may not exceed 0.1), and the temperature of each temperature partition is monitored by the above-mentioned temperature sensors 14, so as to acquire temperature values of different temperature partitions in the containment 1. The number of the humidity sensors 15 is multiple, the multiple humidity sensors 15 are respectively disposed at different positions in the containment 1, so that the internal space of the containment 1 is divided into multiple virtual humidity partitions (more specifically, for example, a typical area and a room with an obstructed gas flow are taken as one partition), and the humidity of each humidity partition is monitored by the humidity sensors 15 arranged as described above, so as to acquire humidity values of different humidity partitions in the containment 1.

In this embodiment, the number of the temperature sensors 14 is k (i.e., MT1, MT2, …, MTk), wherein the initial temperature of the j-th zone is set to T _j0 At t ═ t _i -t _i-1 The temperature is slowly changing over a period of time, t _i Time temperature is set to T _ji (ii) a The number of humidity sensors 15 is m (i.e. MZ1, MZ2, …, MZm), wherein the initial humidity of the j-th zone is set to H _j0 At t ═ t _i -t _i-1 The humidity changes slowly over a period of time, t _i Time humidity is set to H _ji . According to the change situation of the temperature value of each temperature subarea, temperature compensation (namely temperature correction) calculation is carried out in k temperature subareas, namely, the compensation value of the temperature to the volume change is calculated, meanwhile, according to the humidity change data of each humidity subarea, humidity compensation (namely humidity correction) calculation is carried out in m subareas, namely, the compensation value of the humidity to the volume change is calculated, and the sum of the compensation value of the temperature to the volume change and the compensation value of the humidity to the volume change is the compensation leakage rate.

In some embodiments, the data acquisition and processing device further includes a memory 2 (such as a signal data acquisition device), and the first pressure gauge 9 is electrically connected to the data processing terminal 3 through the memory 2 to transmit the acquired real-time pressure value to the memory; the first flowmeter 6 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the acquired flow value of the gas to the memory; the temperature sensor 14 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the acquired temperature value to the memory; the humidity sensor 15 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the collected humidity value to the memory; the memory 2 is used for storing and displaying the real-time pressure value transmitted by the first pressure gauge 9, the flow value of the gas transmitted by the first flow meter 6, the temperature value transmitted by the temperature sensor 14 and the humidity value transmitted by the humidity sensor, and transmitting the flow value, the temperature value and the humidity value of the gas to the data processing terminal to calculate the safe leakage rate.

In this embodiment, the constant pressure control assembly 5 includes a control valve and a controller, the control valve is disposed on the air intake pipeline 4 and is used for controlling the flow rate of the air in the air intake pipeline; the controller is electrically connected with the first pressure gauge 9 and the control valve respectively, the test pressure value is arranged in the controller, the controller is used for receiving the real-time pressure value in the containment detected by the first pressure gauge 9, comparing the real-time pressure value with the test pressure value, and adjusting the opening of the control valve according to the comparison result so as to maintain the real-time pressure value in the containment equal to the test pressure value.

In this embodiment, the air inlet pipeline 4 includes a pressurizing pipeline 10 and a constant pressure testing pipeline 12, the pressurizing pipeline 10 and the constant pressure testing pipeline 12 are arranged in parallel, both are communicated with the containment 1, wherein: the pressurizing pipeline 10 is used for inflating the containment before a test is started so as to enable a real-time pressure value in the containment 1 to quickly reach a test pressure value, a first isolation valve 11 is arranged on the pressurizing pipeline 10, and the first isolation valve 11 is used for controlling the on-off of the pressurizing pipeline 10 so as to inflate the containment; the constant pressure test pipeline 12 is used for supplementing air into the containment vessel in the test process so as to maintain the real-time pressure value in the containment vessel 1 equal to the test pressure value, a second isolation valve 13 is arranged on the constant pressure test pipeline 12, and the second isolation valve 13 is used for controlling the on-off of the constant pressure test pipeline 12 so as to supplement air; the control valve is arranged on the constant pressure test pipeline 12 and used for adjusting the flow of the air supplement gas in the constant pressure test pipeline 12, and the first flow meter 6 is arranged on the constant pressure test pipeline 12 and used for detecting the flow value of the air supplement gas in the constant pressure test pipeline 12 so as to obtain the flow value of the gas required to be introduced for maintaining the real-time pressure value in the containment equal to the test pressure value.

According to the flow values of the air make-up gas in the constant pressure test pipeline 12 detected at different moments, the estimated value of the containment leakage rate (namely, the measured volume leakage rate) can be calculated, and under the condition that the influences of factors such as temperature, humidity and the like are not considered, the estimated value of the containment leakage rate can be used as the containment leakage detected by the system.

In some embodiments, the detector may further include a second pressure gauge 7 and a first temperature gauge 8, the second pressure gauge 7 being provided on the constant pressure test line 12, and being electrically connected to the reservoir 2, for detecting the pressure value in the constant pressure test pipeline 12 and transmitting the pressure value to the memory 2, the memory 2 is also used for receiving the pressure value in the constant pressure test pipeline 12 detected by the second pressure gauge 7 and storing and displaying the pressure value, the first thermometer 8 is arranged on the constant pressure test pipeline 12 and is electrically connected with the memory 2, the data processing terminal 3 is used for detecting the temperature value in the constant pressure test pipeline 12 and transmitting the temperature value to the memory 2, the memory 2 is also used for receiving the temperature value in the constant pressure test pipeline 12 detected by the first thermometer 8, storing and displaying the temperature value, and the data processing terminal 3 is used for calculating the containment leakage rate according to the flow value, the temperature value and/or the humidity value of the gas, and specifically comprises the following steps: the data processing terminal 3 converts the flow value of the gas supply in the constant pressure test pipeline 12 into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the constant pressure test pipeline 12 stored in the memory 2, and then calculates the containment leakage rate according to the flow value of the gas supply in the constant pressure test pipeline 12 under the standard working condition environment or the containment working condition environment.

It should be noted that the constant pressure control assembly may also maintain the real-time pressure value in the containment equal to the test pressure value by using the following principle: the second pressure gauge detects the pressure of the constant pressure test pipeline and transmits the pressure to the controller, and the controller adjusts the opening of the control valve according to the pressure value data detected by the second pressure gauge so as to control the flow of the air supplement gas in the constant pressure test pipeline and ensure that the real-time pressure in the containment is constant and equal to the test pressure.

In some embodiments, the data processing terminal 3 comprises a first calculation module, a second calculation module, and a third calculation module, wherein: the first calculation module is electrically connected with the first flowmeter 6 and used for calculating the measured volume leakage rate according to the flow value of the gas; the second calculation module is electrically connected with the temperature sensor 14 and/or the humidity sensor 15 and is used for calculating the compensation volume leakage rate according to the temperature value and/or the humidity value; the third calculation module is electrically connected with the first calculation module and the second calculation module respectively and used for calculating the actual volume leakage rate according to the measured volume leakage rate and the compensation volume leakage rate and calculating the mass leakage rate according to the actual volume leakage rate so as to obtain the containment leakage rate.

In some embodiments, the first calculation module stores the measured volume leakage rate L under the standard working condition environment _{Measuring, N sigma} The calculation formula (2) is specifically as follows:

the calculation formula is obtained by converting a test working condition environment into a standard working condition environment in the containment, wherein n represents the number of time segments or the number of cycles, and i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measure, P ∑ i} Showing the test condition at t _i The cumulative volume leakage rate of all the subareas at the moment (namely t under the test working condition environment) _i The flow rate value of the gas detected by the first flow meter 6 at the time), P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

represents t _i-1 To t _i The effective specific temperature within the containment during the time period,

and/or measuring volume leakage rate L under standard working condition environment _{Measuring, N sigma} Calculation formula (2), concretelyComprises the following steps:

the calculation formula is obtained by converting the gas supply environment of the pressurizing pipeline into the standard working condition environment, wherein L _{Measuring, N ∑ i} Indicating the standard working condition environment at t _i The measured volume leakage rate accumulated for all sections at a time, n representing the number of time segments or cycles, i representing t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volumetric leak rate for all zones at that time (i.e., at t in a gas supply environment _i The flow rate value of the gas detected by the first flow meter 6 at the time), P _Ai Representing the real-time pressure, P, at the first flow meter in the supplied air environment _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

and/or the first calculation module stores the measured volume leakage rate L under the test working condition environment _{Measuring, p sigma} The calculation formula (2) is specifically as follows:

wherein L is _{Measure, P ∑ i} Showing the test condition at t _i Cumulative measured volume leakage rate for all zones at any time(i.e., at t under the test condition environment _i Flow rate value of gas detected by first flow meter 6 at the time), L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time ₀ Denotes the test pressure, P _Ai Representing the real-time pressure of the first flow meter in the supplied air environment,

represents the average temperature within the case in the test environment,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

the measured volume leakage rate can be generally obtained by directly integrating the measured volume leakage rate with a flowmeter having a function of measuring temperature and pressure, but in the case of a flowmeter not having the function of integrating, the measured volume leakage rate is not limited to the calculation using the above calculation formula.

In some embodiments, the calculating of the compensated volume leakage rate according to the temperature value and/or the humidity value is performed by respectively calculating temperature values and humidity values of all the sections in the containment vessel at different moments and then accumulating the calculated values to obtain the compensated volume leakage rate, and the second calculation module stores the compensated volume leakage rate L in the standard working condition environment _{Complement, N sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time periods or cycles, m represents the number of humidity zones, i represents t _i Time of day or t _i-1 To t _i Time period, j denotes the jth temperature zone or jth humidity zone, k denotes the number of temperature zones, H _ji Denotes the jth humidity zone int _i Relative humidity at the moment H _ji-1 Denotes the jth humidity zone at t _i-1 Relative humidity at the moment P _Hji Denotes the jth humidity zone at t _i Saturated partial pressure of water vapor at time, P _Hji-1 Denotes the jth humidity zone at t _i-1 Saturated partial pressure of water vapour at time, V _Hj Represents the percentage of the jth humidity zone in the free volume of the containment vessel, V ₀ Representing the free volume of the containment vessel, P ₀ Denotes the test pressure, P _N The pressure (1 atmosphere, 0.1013MPa. a, which is not described in detail below) in the standard working condition environment is represented, and Δ t represents t _i-1 To t _i Time length of time, T _N The temperature (0 ℃, 273.15K absolute temperature, not described in detail below) in the standard working condition environment is represented by T _Hji-1 Denotes the jth humidity zone at t _i-1 Absolute temperature at time, T _Hji Denotes the jth humidity zone at t _i Absolute temperature at time, T _ji Denotes the j temperature zone at t _i Absolute temperature at time, T _ji-1 Denotes the j temperature zone at t _i-1 Absolute temperature of moment, V _Tj Representing the percentage of the jth temperature zone in the free volume of the containment vessel;

and/or the second calculation module is internally stored with a compensation volume leakage rate L under the test working condition environment _{Complement, P sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time periods or cycles, m represents the number of humidity zones, i represents t _i Time of day or t _i-1 To t _i Time period, j denotes the jth temperature zone or jth humidity zone, k denotes the number of temperature zones, H _ji Denotes the jth humidity zone at t _i Relative humidity at the moment H _ji-1 Denotes the jth humidity zone at t _i-1 Relative humidity at the moment P _Hji Denotes the jth humidity division at t _i Saturated partial pressure of water vapor at time, P _Hji-1 Denotes the jth humidity zone at t _i-1 Saturated partial pressure of water vapour at time, V _Hj Represents the percentage of the jth humidity zone in the free volume of the containment vessel, V ₀ Representing the free volume of the containment vessel, P ₀ Denotes the test pressure (0.42MPa. g, calculated absolute pressure is 0.5213MPa. a, which is not described in detail below), and Δ t denotes t _i-1 To t _i Time length of time, T _ji Denotes the j temperature zone at t _i Absolute temperature at time, T _ji-1 Denotes the jth temperature zone at t _i-1 Absolute temperature of moment, V _Tj Representing the percentage of the jth temperature zone in the free volume of the containment vessel;

in some embodiments, the third calculation module stores the actual volume leakage rate L under the test working condition environment _{Real, P sigma} The calculation formula (2) is specifically as follows:

L _{real, P sigma} ＝L _{Measuring, P sigma} +L _{Complement, P sigma}

The third calculation module is internally stored with the actual volume leakage rate L under the standard working condition environment _{Real, N sigma} The calculation formula (2) is specifically as follows:

L _{real, N sigma} ＝L _{Measuring, N sigma} +L _{Complement, N sigma}

The subscript N represents a standard working condition environment, the subscript P represents a test working condition environment, and the subscript sigma-sigma table accumulates all partitions at all times.

The third calculation module also stores a calculation formula of the mass leakage rate, and the calculation formula specifically comprises:

calculating mass leakage rate M in delta t time under standard working condition environment _∑i The calculation formula (2) is specifically as follows:

wherein the subscript ∑ i denotes t _i All the subareas at the moment are accumulated, and the subscript N sigma i represents t under the standard working condition environment _i All partitions are accumulated at all times, L _{Real, N Σ i} Indicating the standard working condition environment at t _i The time being accumulated for all divisionsActual volume leakage rate, m _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average partial pressure of water vapour at the moment,

represents t _i-1 The average partial pressure of water vapour at the moment,

represents t _i The average water vapor partial pressure at the time, R, represents the ideal gas constant (8.314J. mol.) ^-1 ·k ^-1 )，P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N Indicating the temperature under the environment of standard working conditions;

or calculating the mass leakage rate M within a delta t time under the test working condition environment _∑i The calculation formula (2) is specifically as follows:

wherein the subscript ∑ i denotes t _i All the subareas at the moment are accumulated, and the subscript P sigma i represents t under the test working condition environment _i All partitions are accumulated at all times, L _{True, P Σ i} Showing the test condition at t _i Cumulative actual volume leakage rate, m, for all zones at that time _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average partial pressure of water vapour at the moment,

represents t _i-1 Mean partial pressure of water vapor at the time, R represents the ideal gas constant, P ₀ Denotes the test pressure, P _N The pressure in the environment of the standard working condition is shown,

represents t _i To t _i-1 The effective specific temperature within the containment during the time period,

calculating the total mass leakage rate M in a plurality of continuous delta t times _∑∑ The total mass leakage rate is containment leakage rate of the system, and the calculation formula is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i A time period.

It should be noted that the actual average pressure in the containment vessel is all around P ₀ Fluctuating with a slight amplitude. Therefore, P in each calculation formula in the present embodiment ₀ Can also be replaced by a real-time measured pressure P in the safety housing _i (relative change before and after replacement is only about five parts per million), and, with P _i The calculation is more consistent with the actual change process of the pressure in the containment vessel, and the result is more accurate.

Below at 1000m ³ Example of a containment vessel, wherein the test pressure P ₀ The (absolute pressure) is 533.65kPa, the temperature zones are 28, the arrangement of each temperature sensor is shown in table 1, the humidity zones are 10, and the arrangement of each humidity sensor is shown in table 2, and the above calculation process is described in detail as follows:

TABLE 1

TABLE 2

Because temperature, humidity, pressure in the containment are real-time change in this system measurement process, the flow of the supplementary gas on the admission pipeline also can take place corresponding change, accomplish the measurement and the analysis of containment leakage rate through the data in detectors such as first pressure gauge in the continuous collection 24h, wherein:

the real-time change of the temperature in the containment vessel within 24h is shown in FIG. 2;

the real-time change of the humidity in the containment vessel within 24h is shown in fig. 3;

the real-time change of the pressure in the containment vessel within 24h is shown in fig. 4;

the real-time variation of the flow rate of the make-up gas in the constant pressure test line over 24h is shown in fig. 5.

The first time period Δ t of 24h is taken as 10s (i.e., 0 to 10s) to illustrate the single-time volume leakage rate L _{Real, N Σ i} Mass leakage rate M at sum time _∑i The calculation of (2):

T1-T28 temperature sensor at T _i-1 The temperature value data (unit ℃) acquired at any moment are as follows in sequence:

32.5680,32.5840,32.6770,32.7190,32.8540,33.0000,32.9560,32.9010,32.8570,33.0530,32.8720,32.8330,32.7520,33.1960,32.8320,33.1960,33.0260,33.3470,32.9680,33.2100,33.3170,33.1310,33.2670,33.3580,33.2160,33.0400,32.3840,32.4840；

H1-H10 humidity sensor at t _i-1 The number of humidity values collected at any momentAccording to (%) in order:

48.1898,46.8971,47.1527,47.7582,46.3522,48.7407,46.4725,46.7261,46.1951,48.9654；

the first pressure gauge is at t _i-1 The real-time pressure in the containment vessel acquired at any moment is as follows: 533.652 kpa;

first flow meter at t _i-1 The value of the gas flow is acquired at the moment, namely the measured leakage rate (standard working condition) is as follows: 0.7945m ³ /h；

T1-T28 temperature sensor at T _i Time (t) _i -t _i-1 10s) the collected temperature value data (unit c) are:

32.5670,32.5810,32.6790,32.7170,32.8600,32.9950,32.9550,32.9060,32.8540,33.0530,32.8750,32.8310,32.7530,33.1950,32.8340,33.1980,33.0270,33.3480,32.9680,33.2100,33.3160,33.1320,33.2700,33.3560,33.2150,33.0390,32.3850,32.4870；

H1-H10 humidity sensor at t _i The humidity value data (%) acquired at the moment are as follows in sequence:

48.1968,46.8991,47.1556,47.7602,46.3552,48.7447,46.4715,46.7281,46.1990,48.9595；

the first pressure gauge is at t _i The real-time pressure in the containment vessel acquired at any moment is as follows: 533.652 kpa;

first flow meter at t _i The gas flow value is acquired at any moment, namely the measured leakage rate (standard working condition) is as follows: 0.7975m ³ /h；

Substituting the acquired data into the above calculation formula to obtain:

t _i the effective specific temperature in the containment vessel at the moment is as follows:

at t _i-1 To t _i The measured volumetric leak rate over the time period was:

L _{measuring, N ∑ i} ＝0.796m ³ /h。

According to the calculation model in example 1, respectively:

at t _i-1 To t _i The compensated leak rate over the time period is:

L _{complement, N Σ i} ＝3.16703m ³ /h。

At t _i-1 To t _i The actual volumetric leak rate over the time period is:

L _{real, N Σ i} ＝L _{Measuring, N ∑ i} +L _{Complement, N Σ i} ＝3.96268m ³ /h

Passing through t _i-1 The temperature and the humidity in the containment at the moment can be calculated to obtain t _i-1 The partial pressure of the steam in the containment at the moment is as follows:

passing through t _i The temperature and the humidity in the containment at the moment can be calculated to obtain t _i The partial pressure of the steam in the containment at the moment is as follows:

at t _i-1 To t _i The actual mass leakage rate over the time period is:

dividing the acquired data in 24h into 24 multiplied by 360 time periods of 10s, and obtaining the 24 multiplied by 360 single-time measurement volume leakage rate L in each time period according to the single-time calculation process _{Test, N Σ i} Compensating for volume leakage rate L _{Complement, N Σ i} Actual volume leakage rate L _{Real, N Σ i} And mass leakage rate M _∑i . Here, the calculation in other single-time periods is not repeated, and only the actual volume leakage rate L in 24h is illustrated by a figure _{Real, N Σ i} And mass leakage rate M _∑i A process of variation wherein:

actual volume leakage rate L within 24h _{Real, N Σ i} The real-time variation of (a) is shown in fig. 6.

Mass leakage rate M within 24h _∑i The real-time variation of (a) is shown in fig. 7.

Measured volumetric leak rate L for a single instant of time for all periods within 24h _{Measuring, N ∑ i} And accumulating and calculating the average value, and calculating to obtain the measured volume leakage rate within 24h as:

L _{measuring, N sigma} ＝1.05534m ³ /h

Compensating for volumetric leak rate L for a single instant over all periods of 24h _{Complement, N Σ i} And accumulating and calculating the average value, and calculating to obtain the compensation volume leakage rate within 24h as:

L _{complement, N sigma} ＝0.15381m ³ /h

Safety casing volume 1000m ³ The relative volumetric leak rate was 0.617553% total volume of gas in containment per day.

The average actual volumetric leak rate over 24h is:

L _{real, N sigma} ＝L _{Measuring, N sigma} +L _{Complement, N sigma} ＝1.20915m ³ /h

Mass leakage rate M for a single moment of all periods within 24h _∑i And accumulating and calculating the average value, and calculating to obtain the mass leakage rate of 24h as follows:

at time 0, the total mass of the in-containment gas was 6063.65kg, and the relative mass leakage rate was 0.618286% total mass of in-containment gas per day.

In some embodiments, the system further includes a verification line 16 for verifying the accuracy of the calculated containment leak rate after the containment leak rate is calculated. The verification pipeline 16 is provided with a third isolation valve 17, and the third isolation valve 17 is used for controlling the on-off and the opening of the verification pipeline; the detector also comprises a second flowmeter 18, the second flowmeter 18 is arranged on the verification pipeline 16, is electrically connected with the data processing terminal 3 through the memory 2, and is used for detecting the flow value data of the gas in the verification pipeline 16 and transmitting the flow value data to the memory for storage and display; the data processing terminal 3 is also arranged to determine a reference leak rate (in particular calculated from the flow value data detected by the second flowmeter 18, by opening the third isolating valve 17) from the flow value of the gas in the verification line 16 stored in the memory 2, and recalculating the containment leakage rate on the basis of the superposed reference leakage rate to obtain the containment leakage rate (recorded as the total containment leakage rate) after the superposed reference leakage, and, calculating a measured leakage rate (the measured leakage rate is containment leakage after the reference leakage is superposed-containment leakage rate before the reference leakage is superposed) according to the containment leakage rate before the reference leakage is superposed and the containment leakage rate after the reference leakage is superposed, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation between the measured leakage rate and the reference leakage rate.

In some embodiments, the detector further comprises a third pressure gauge 19, a second temperature gauge 20, wherein: the third pressure gauge 19 is arranged on the verification pipeline 16 and is electrically connected with the memory 2, and the third pressure gauge 19 is used for detecting the pressure value of the gas in the verification pipeline 16 and transmitting the pressure value to the memory 2 for storage and display; the second thermometer 20 is arranged on the verification pipeline 16, is electrically connected with the memory 2, and is used for detecting the temperature value in the verification pipeline 20 and transmitting the temperature value to the memory 2 for storage and display; the above determining the reference leak rate according to the flow value of the gas in the verification line 16 stored in the memory 2 specifically includes: the data processing terminal 3 converts the flow value of the gas in the verification pipeline 16 into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the verification pipeline 16 stored in the memory 2, and then calculates the reference leakage rate according to the flow value of the gas in the verification pipeline 16 under the standard working condition environment or the containment working condition environment.

The following details the measurement process of the containment leakage rate measurement test system of the present embodiment, specifically as follows:

(1) various detectors (e.g., the first flow meter 6, the first pressure meter 9, the temperature sensor 14, the humidity sensor, etc.) are turned on, data such as detected flow values, temperature values, and humidity values are transmitted to the memory 2 and the controller, and the data processing terminal 3 is turned on to run acquisition and analysis software.

(2) An upstream gas source is connected, the first isolation valve 11 is opened, and compressed gas is filled into the containment 1 through the pressurizing pipeline 10 so as to raise the pressure in the containment.

(3) When the pressure in the containment reaches the test pressure, the first isolation valve 11 is closed, the second isolation valve 13 is opened, the pressurizing pipeline 10 is switched to the constant pressure test pipeline 12, the real-time pressure value in the containment 1 detected by the first pressure gauge 9 is passed, the controller adjusts the opening of the control valve in a linkage manner according to the real-time pressure value condition in the containment 1 detected by the first pressure gauge 1 so as to continuously supply air to the containment, thereby maintaining the pressure in the containment to be always equal to the test pressure, meanwhile, the flow value of the air supply gas in the constant pressure test pipeline 12 is detected by the first flow meter 6 and is transmitted to the memory 2, and the first calculation module in the data processing terminal 3 calculates the estimated value of the containment leakage rate (namely, the measured volume leakage rate) according to the flow value of the air supply gas stored in the memory.

(4) Meanwhile, a temperature sensor 14 and a humidity sensor 15 are used for detecting a temperature value and a humidity value in a containment 1 and transmitting the temperature value and the humidity value to a memory 2, a second calculation module in a data processing terminal 3 calculates a compensation value of temperature and humidity to a containment leakage rate in a certain time period according to the temperature value and the humidity value stored in the memory 2, namely, a compensation leakage rate is calculated, a third calculation module in the data processing terminal 3 calculates the containment leakage rate again, the calculated containment leakage rate is compared with a maximum allowable leakage rate La to judge that the pressure in the containment reaches a stable boundary condition, and then formal test data recording is started, for example, the compensation leakage rate L in the last hour is calculated ₁ And compensated leak rate L over the last two hours ₂ When L is present ₁ ＞L ₂ And L is ₁ -L ₂ And if the pressure in the containment vessel is less than 0.25La, wherein La is the maximum allowable leakage rate, and is set according to the actual condition, the pressure in the containment vessel is judged to meet the stable boundary condition.

(5) Continuously collecting various required flow values, temperature values, humidity values and other data within a certain time (such as 24h), and calculating the containment leakage rate (recorded as the body leakage rate) within 24 h.

(6) Opening a third isolation valve 17, connecting a verification pipeline 16, superposing a known reference leakage rate (obtained by calculation according to data detected by a second flowmeter) on the basis of the containment leakage rate obtained by calculation in the step (5), calculating according to the steps (1) to (5) to obtain the containment leakage rate (marked as the total leakage rate) in 24h after superposing the reference leakage rate, calculating the measured leakage rate (namely the total leakage rate-the body leakage rate) of the verification pipeline, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation of the measured leakage rate and the reference leakage rate.

It should be noted that the containment leakage rate measurement test system of the present embodiment may be used for measuring containment leakage by the constant pressure method, and may also be used for measuring containment leakage rate by the conventional pressure drop method, where the process is as follows:

(1) starting each detector (such as the first pressure gauge 9 and the first flow meter 6), transmitting data such as detected flow values and pressure values to the memory 2 and the controller, starting the data processing terminal 3, and running the acquisition and analysis software, wherein a calculation model of a pressure drop method is arranged in the acquisition and analysis software, which is not described herein again.

(2) An upstream gas source is connected, the first isolation valve 11 is opened, and compressed gas is filled into the containment through the pressurizing pipeline 12 to increase the pressure in the containment.

(3) When the pressure in the containment vessel 1 exceeds the test pressure or more, for example, 10KPa, the first isolation valve 11 is closed to stop the inflation of the containment vessel.

(4) The pressure in the containment vessel is reduced along with the leakage of the gas in the safety vessel, the real-time pressure value in the containment vessel 1 detected by the first pressure gauge 9 is used for calculating the leakage rate of the containment vessel in a certain time through the first calculation module, the second calculation module and the third calculation module, and the leakage rate of the containment vessel in the certain time is calculated through the first calculation module, the second calculation module and the third calculation moduleComparing the calculated containment leakage rate with the maximum allowable leakage rate La to judge that the pressure in the containment reaches a stable boundary condition, and then starting formal test data recording, for example, calculating the containment leakage rate L in the last hour ₃ And containment leak rate L over the last two hours ₃ When L is present ₃ ＞L ₄ And L is ₃ -L ₄ And if the pressure in the containment vessel is less than 0.25La, wherein La is the maximum allowable leakage rate, and is set according to the actual condition, the pressure in the containment vessel is judged to meet the stable boundary condition.

(5) Continuously collecting data such as various required flow values within a certain time (such as 24h), and calculating the containment leakage rate (recorded as the body leakage rate) within 24 h.

(6) Opening a third isolation valve 17, connecting a verification pipeline 16, superposing a known reference leakage rate (obtained by calculation according to data detected by a second flowmeter) on the basis of the containment leakage rate obtained by calculation in the step (5), calculating according to the steps (1) to (5) to obtain the containment leakage rate (marked as the total leakage rate) in 24h after superposing the reference leakage rate, calculating the measured leakage rate (namely the total leakage rate-the body leakage rate) of the verification pipeline, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation of the measured leakage rate and the reference leakage rate.

The containment leakage rate measurement test system of the embodiment adopts a constant pressure method containment leakage rate measurement technology, can be completed under the condition of maintaining the pressure inside a containment constant, and is kept to be continuously inflated in the measurement process so as to keep the pressure inside the containment constant. Moreover, the system fully focuses on the influence of temperature change and humidity change on containment leakage rate measurement in the measurement process, and can give a proper acquisition period to calculate temperature compensation and humidity compensation by combining the characteristics of continuous change of temperature and humidity, namely, the calculation model of the containment leakage rate in the system analyzes the gas really leaked in the containment.

Example 2

As shown in fig. 1, the embodiment discloses a containment leakage rate measurement test system for measuring a containment leakage rate by a constant pressure method, which includes an air inlet pipeline 4, a data acquisition and processing device, and a constant pressure control assembly 5, wherein:

the air inlet pipeline 4 is communicated with the containment vessel 1 and is used for introducing gas (such as air and compressed air) into the containment vessel;

the data acquisition processing device is electrically connected with the constant pressure control assembly 5 and is used for acquiring the real-time pressure value in the containment 1, and transmits it to a constant pressure control assembly 5, the constant pressure control assembly 5 is provided on the air intake line 4, is used for receiving the real-time pressure value transmitted by the data acquisition and processing device, comparing the real-time pressure value with a test pressure value preset in the constant pressure control component 5, adjusting the opening degree of the air inlet pipeline 4 according to the comparison result to control the flow value of the gas introduced into the containment 1, so as to maintain the real-time pressure value in the containment vessel equal to the test pressure value, the data acquisition and processing device is also used for acquiring the flow value of the gas required to be introduced into the containment vessel to maintain the real-time pressure value in the containment vessel 1 equal to the test pressure value, and calculating the containment leakage rate according to the flow value data of the gas and the temperature value and/or the humidity value in the containment.

In some embodiments, the data acquisition and processing device comprises a detector, a data processing terminal 3 (e.g. a computer), the detector comprising a first pressure gauge 9, a first flow meter 6, and a temperature sensor 14 and/or a humidity sensor 15, wherein: the first pressure 9 is arranged in the containment vessel 1, is respectively and electrically connected with the data processing terminal 3 and the constant pressure control assembly 5, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel 1 and transmit the real-time pressure value to the data processing terminal 3 and the constant pressure control assembly 5; the first flowmeter 6 is arranged on the air inlet pipeline 4, is electrically connected with the data processing terminal 3, and is used for detecting the gas flow in the air inlet pipeline 4, so as to acquire the flow value of the gas and transmit the flow value to the data processing terminal 3; the temperature sensor 14 is arranged in the containment vessel 1, is electrically connected with the data processing terminal 3, and is used for detecting the real-time temperature in the containment vessel 1 so as to acquire a temperature value in the containment vessel 1 and transmit the temperature value to the data processing terminal 3; the humidity sensor 15 is arranged in the containment vessel 1, is electrically connected with the data processing terminal 3, and is used for detecting the real-time humidity in the containment vessel 1 so as to acquire and obtain a humidity value in the containment vessel 1 and transmit the humidity value to the data processing terminal 3; and the data processing terminal 3 is used for calculating the containment leakage rate according to the flow value, the temperature value and/or the humidity value of the gas.

In this embodiment, the data processing terminal 3 is configured to calculate the containment leakage rate according to a flow value, a temperature value, and/or a humidity value of the gas, and specifically includes:

firstly, a data processing terminal 3 calculates to obtain a measured volume leakage rate according to a gas flow value, and the measured volume leakage rate can be used as an index for measuring the containment leakage rate under the condition of not considering factors such as temperature, humidity and the like;

the data processing terminal 3 calculates a compensation value of the temperature to the containment leakage rate according to the temperature value and/or calculates a compensation value of the humidity to the containment leakage rate according to the humidity value to obtain a compensation volume leakage rate, so as to correct the containment leakage rate, thereby further improving the accuracy of the containment leakage rate;

and thirdly, the data processing terminal 3 calculates the actual volume leakage rate according to the measured volume leakage rate and the compensated volume leakage rate, and calculates the mass leakage rate according to the actual volume leakage rate to obtain the containment leakage rate.

In some embodiments, as shown in fig. 1, the number of the temperature sensors 14 is multiple, the multiple temperature sensors 14 are respectively disposed at different positions in the containment 1, so that the internal space of the containment 1 is divided into multiple virtual temperature partitions (more specifically, for example, a typical area, a room with obstructed gas flow is taken as one partition, and a volume coefficient of each temperature partition may not exceed 0.1), and the temperature of each temperature partition is monitored by the above-mentioned temperature sensors 14, so as to acquire temperature values of different temperature partitions in the containment 1. The number of the humidity sensors 15 is multiple, the multiple humidity sensors 15 are respectively disposed at different positions in the containment 1, so that the internal space of the containment 1 is divided into multiple virtual humidity partitions (more specifically, for example, a typical area and a room with an obstructed gas flow are taken as one partition), and the humidity of each humidity partition is monitored by the humidity sensors 15 arranged as described above, so as to acquire humidity values of different humidity partitions in the containment 1.

In this embodiment, the number of the temperature sensors 14 is k (i.e., MT1, MT2, …, MTk), wherein the initial temperature of the j-th zone is set to T _j0 At t ═ t _i -t _i-1 The temperature is slowly changing over a period of time, t _i Time temperature is set to T _ji (ii) a The number of humidity sensors 15 is m (i.e. MZ1, MZ2, …, MZm), wherein the initial humidity of the j-th zone is set to H _j0 Where Δ t is equal to t _i -t _i-1 The humidity changes slowly over a period of time, t _i Time humidity is set to H _ji . According to the change situation of the temperature value of each temperature subarea, temperature compensation (namely temperature correction) calculation is carried out in k temperature subareas, namely, the compensation value of the temperature to the volume change is calculated, meanwhile, according to the humidity change data of each humidity subarea, humidity compensation (namely humidity correction) calculation is carried out in m subareas, namely, the compensation value of the humidity to the volume change is calculated, and the sum of the compensation value of the temperature to the volume change and the compensation value of the humidity to the volume change is the compensation leakage rate.

In some embodiments, the data acquisition and processing device further includes a memory 2 (such as a signal data acquisition unit), and the first pressure gauge 9 is electrically connected to the data processing terminal 3 through the memory 2 to transmit the acquired real-time pressure value to the memory; the first flowmeter 6 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the acquired flow value of the gas to the memory; the temperature sensor 14 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the acquired temperature value to the memory; the humidity sensor 15 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the collected humidity value to the memory; the memory 2 is used for storing and displaying the real-time pressure value transmitted by the first pressure gauge 9, the flow value of the gas transmitted by the first flow meter 6, the temperature value transmitted by the temperature sensor 14 and the humidity value transmitted by the humidity sensor, and transmitting the flow value, the temperature value and the humidity value of the gas to the data processing terminal to calculate the safe leakage rate.

In this embodiment, the constant pressure control assembly 5 includes a control valve and a controller, the control valve is disposed on the air intake pipeline 4 and is used for controlling the flow rate of the air in the air intake pipeline; the controller is electrically connected with the first pressure gauge 9 and the control valve respectively, the test pressure value is arranged in the controller, the controller is used for receiving the real-time pressure value in the containment detected by the first pressure gauge 9, comparing the real-time pressure value with the test pressure value, and adjusting the opening of the control valve according to the comparison result so as to maintain the real-time pressure value in the containment equal to the test pressure value.

In this embodiment, the air inlet pipeline 4 includes a pressurizing pipeline 10 and a constant pressure testing pipeline 12, the pressurizing pipeline 10 and the constant pressure testing pipeline 12 are arranged in parallel, both are communicated with the containment 1, wherein: the pressurizing pipeline 10 is used for inflating the containment before a test is started so as to enable a real-time pressure value in the containment 1 to quickly reach a test pressure value, a first isolation valve 11 is arranged on the pressurizing pipeline 10, and the first isolation valve 11 is used for controlling the on-off of the pressurizing pipeline 10 so as to inflate the containment; the constant pressure test pipeline 12 is used for supplementing air into the containment vessel in the test process so as to maintain the real-time pressure value in the containment vessel 1 to be equal to the test pressure value, a second isolation valve 13 is arranged on the constant pressure test pipeline 12, and the second isolation valve 13 is used for controlling the on-off of the constant pressure test pipeline 12 so as to supplement air; the control valve is arranged on the constant pressure test pipeline 12 and used for adjusting the flow of the air supplement gas in the constant pressure test pipeline 12, and the first flow meter 6 is arranged on the constant pressure test pipeline 12 and used for detecting the flow value of the air supplement gas in the constant pressure test pipeline 12 so as to obtain the flow value of the gas required to be introduced for maintaining the real-time pressure value in the containment equal to the test pressure value.

According to the flow values of the air make-up gas in the constant-pressure test pipeline 12 detected at different moments, the estimated value of the containment leakage rate (namely, the measured volume leakage rate) can be calculated, and under the condition that the influences of factors such as temperature, humidity and the like are not considered, the estimated value of the containment leakage rate can be used as the containment leakage detected by the system.

In some embodiments, the detector may further comprise a second pressure gauge 7 and a first temperature gauge 8, the second pressure gauge 7 being provided with a constant pressure test line 12, and being electrically connected to the reservoir 2, for detecting the pressure value in the constant pressure test pipeline 12 and transmitting the pressure value to the memory 2, the memory 2 is also used for receiving the pressure value in the constant pressure test pipeline 12 detected by the second pressure gauge 7 and storing and displaying the pressure value, the first thermometer 8 is arranged on the constant pressure test pipeline 12 and is electrically connected with the memory 2, the data processing terminal 3 is used for detecting the temperature value in the constant pressure test pipeline 12 and transmitting the temperature value to the memory 2, the memory 2 is also used for receiving the temperature value in the constant pressure test pipeline 12 detected by the first thermometer 8, storing and displaying the temperature value, and the data processing terminal 3 is used for calculating the containment leakage rate according to the flow value, the temperature value and/or the humidity value of the gas, and specifically comprises the following steps: the data processing terminal 3 converts the flow value of the gas supply in the constant pressure test pipeline 12 into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the constant pressure test pipeline 12 stored in the memory 2, and then calculates the containment leakage rate according to the flow value of the gas supply in the constant pressure test pipeline 12 under the standard working condition environment or the containment working condition environment.

It should be noted that the constant pressure control assembly may also maintain the real-time pressure value in the containment equal to the test pressure value by using the following principle: the second pressure gauge detects the pressure of the constant pressure test pipeline and transmits the pressure to the controller, and the controller adjusts the opening of the control valve according to the pressure value data detected by the second pressure gauge so as to adjust and control the flow of the air supplement gas in the constant pressure test pipeline, thereby ensuring that the real-time pressure in the containment is constant and equal to the test pressure.

In some embodiments, the data processing terminal 3 comprises a first calculation module, a second calculation module, and a third calculation module, wherein: the first calculation module is electrically connected with the first flowmeter 6 and used for calculating the measured volume leakage rate according to the flow value of the gas; the second calculation module is electrically connected with the temperature sensor 14 and/or the humidity sensor 15 and is used for calculating the compensation volume leakage rate according to the temperature value and/or the humidity value; the third calculation module is electrically connected with the first calculation module and the second calculation module respectively and used for calculating the actual volume leakage rate according to the measured volume leakage rate and the compensation volume leakage rate and calculating the mass leakage rate according to the actual volume leakage rate so as to obtain the containment leakage rate.

In some embodiments, the first calculation module stores the measured volume leakage rate L under the standard working condition environment _{Measuring, N ∑ i} Is calculated by the formula L _{Test, N Σ i} Indicating the standard working condition environment at t _i The volume leakage rate is measured by the accumulation of all the subareas at the moment, and when the first flowmeter 6 has the function of standard working condition flow conversion, the volume leakage rate L is measured _{Measuring, N ∑ i} Measured directly by the first flow meter 6, i.e. at t in a standard operating environment _i The flow rate value of the gas detected by the first flowmeter 6 at that time is measured as the volume leakage rate L when the first flowmeter 6 does not have the standard operation condition switching function _{Measuring, N ∑ i} The calculation formula (2) is specifically as follows:

wherein i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time _Ai Representing the real-time pressure, P, at the first flow meter in the supplied air environment _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

and/or measuring volume leakage rate L under the environment of test working condition _{Measure, P ∑ i} Is calculated by the formula L _{Measure, P ∑ i} Showing the test condition at t _i The actual volume leakage rate accumulated in all the subareas at the moment is measured, and when the first flowmeter 6 has the function of converting the standard working condition flow rate, the volume leakage rate L is measured _{Measuring, N ∑ i} Measured directly by the first flow meter 6, i.e. at t under test conditions _i The flow rate value of the gas detected by the first flowmeter 6 at that time is measured as the volume leakage rate L when the first flowmeter 6 does not have the standard operation condition switching function _{Measuring, N ∑ i} The calculation formula (2) is specifically as follows:

wherein i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time ₀ Denotes the test pressure, P _Ai Representing the real-time pressure of the first flow meter in the supplied air environment,

represents the average temperature within the case in the test environment,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

in some embodiments, the second calculation module calculates the compensated volume leakage rate according to the temperature value and/or the humidity value, specifically, the compensated volume leakage rate is calculated based on the average temperature of each temperature partition and the average humidity of each humidity partition in the containment, and the containment leakage rate L under the standard working condition environment is stored in the second calculation module _{Complement, N Σ i} Is calculated by the formula L _{Complement, N Σ i} Indicating the standard working condition environment at t _i The calculation formula of the compensation volume leakage rate accumulated by all the subareas at the moment specifically comprises the following steps:

wherein the content of the first and second substances,

is shown at t _i The average relative humidity of all the zones at the moment,

is shown at t _i The average saturated water vapor partial pressure of all the partitions at that time,

is shown at t _i-1 The average relative humidity of all the zones at the moment,

is shown at t _i-1 The average saturated water vapor partial pressure of all the partitions at that time,

represents t _i The average temperature at the time of day is,

represents t _i-1 Mean temperature at time, V ₀ Represents the free volume of the containment vessel, Δ t represents t _i-1 To t _i Time length of time, P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N Indicating the temperature under the environment of standard working conditions;

and/or a calculation formula of the containment leakage rate under the test working condition environment is stored in the second calculation module, and the calculation formula is specifically as follows:

wherein the content of the first and second substances,

is shown at t _i The average relative humidity of all the zones at the moment,

is shown at t _i The average saturated water vapor partial pressure of all the partitions at that time,

is shown at t _i-1 The average relative humidity of all the zones at the moment,

is shown at t _i-1 The average saturated water vapor partial pressure of all the partitions at that time,

represents t _i The average temperature at the time of day is,

represents t _i-1 Mean temperature at time, V ₀ Represents the free volume of the containment vessel, Δ t represents t _i-1 To t _i The time length of the moment;

in some embodiments, the third calculation module stores the actual volume leakage rate L under the standard working condition environment _{Real, N Σ i} Calculation of (a), L _{Real N Σ i} Indicating the standard working condition environment at t _i The calculation formula of the actual volume leakage rate accumulated by all the subareas at the moment is specifically as follows:

L _{real, N Σ i} ＝L _{Measuring, N ∑ i} +L _{Complement, N Σ i}

And/or the third calculation module is internally stored with the actual volume leakage rate L under the test working condition environment _{True, P Σ i} Is calculated by the formula L _{True, P Σ i} Showing the test condition at t _i Time of dayThe calculation formula of the actual volume leakage rate accumulated by the subareas is as follows:

L _{true, P Σ i} ＝L _{Measure, P ∑ i} +L _{Complement, P ∑ i}

The third calculation module is also internally stored with a mass leakage rate M under the standard working condition environment _N∑i Calculation of (A), M _N∑i Indicating the standard working condition environment at t _i The calculation formula of the mass leakage rate accumulated by all the subareas at the moment is specifically as follows:

wherein m is _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

denotes t _i The average water vapor partial pressure at the time, R, represents the ideal gas constant;

and/or the third calculation module is also internally stored with the mass leakage rate M under the test working condition environment _P∑i Calculation of (A), M _P∑i Showing the test condition at t _i The calculation formula of the mass leakage rate accumulated by all the subareas at the moment is specifically as follows:

wherein m is _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Represents the molar mass of water vapor, P ₀ The pressure of the test is shown as,

denotes t _i The average water vapor partial pressure at that time, R, represents the ideal gas constant.

It should be noted that the actual average pressure in the containment vessel is all around P ₀ Fluctuating with a slight amplitude. Therefore, P in each calculation formula in the present embodiment ₀ Can also be replaced by "DiananReal-time measured pressure P in the entire housing _i (relative change before and after replacement is only about five parts per million), and, with P _i The calculation is more consistent with the actual change process of the pressure in the containment vessel, and the result is more accurate.

In some embodiments, the system further includes a verification line 16 for verifying the accuracy of the calculated containment leak rate after the containment leak rate is calculated. The verification pipeline 16 is provided with a third isolation valve 17, and the third isolation valve 17 is used for controlling the on-off and the opening of the verification pipeline; the detector also comprises a second flowmeter 18, the second flowmeter 18 is arranged on the verification pipeline 16, is electrically connected with the data processing terminal 3 through the memory 2, and is used for detecting the flow value data of the gas in the verification pipeline 16 and transmitting the flow value data to the memory for storage and display; the data processing terminal 3 is also adapted to determine a reference leak rate (which can be calculated, in particular, by opening the third isolation valve 17, from the data of the flow rate value detected by the second flowmeter 18) from the flow rate value of the gas in the verification line 16 stored in the memory 2, and recalculating the containment leakage rate on the basis of the superposed reference leakage rate to obtain the containment leakage rate (recorded as the total containment leakage rate) after the superposed reference leakage, and, calculating a measured leakage rate (the measured leakage rate is containment leakage after the reference leakage is superposed-containment leakage rate before the reference leakage is superposed) according to the containment leakage rate before the reference leakage is superposed and the containment leakage rate after the reference leakage is superposed, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation between the measured leakage rate and the reference leakage rate.

In some embodiments, the detector further comprises a third pressure gauge 19, a second temperature gauge 20, wherein: the third pressure gauge 19 is arranged on the verification pipeline 16 and is electrically connected with the memory 2, and the third pressure gauge 19 is used for detecting the pressure value of the gas in the verification pipeline 16 and transmitting the pressure value to the memory 2 for storage and display; the second thermometer 20 is arranged on the verification pipeline 16, is electrically connected with the memory 2, and is used for detecting the temperature value in the verification pipeline 20 and transmitting the temperature value to the memory 2 for storage and display; the above determining the reference leak rate according to the flow value of the gas in the verification line 16 stored in the memory 2 specifically includes: the data processing terminal 3 converts the flow value of the gas in the verification pipeline 16 into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the verification pipeline 16 stored in the memory 2, and then calculates the reference leakage rate according to the flow value of the gas in the verification pipeline 16 under the standard working condition environment or the containment working condition environment.

The following details the measurement process of the containment leakage rate measurement test system of the present embodiment, specifically as follows:

(1) various detectors (e.g., the first flow meter 6, the first pressure meter 9, the temperature sensor 14, the humidity sensor, etc.) are turned on, data such as detected flow values, temperature values, and humidity values are transmitted to the memory 2 and the controller, and the data processing terminal 3 is turned on to run acquisition and analysis software.

(2) An upstream gas source is connected, the first isolation valve 11 is opened, and compressed gas is filled into the containment 1 through the pressurizing pipeline 10 so as to raise the pressure in the containment.

(3) When the pressure in the containment reaches the test pressure, the first isolation valve 11 is closed, the second isolation valve 13 is opened, the pressurizing pipeline 10 is switched to the constant pressure test pipeline 12, the real-time pressure value in the containment 1 detected by the first pressure gauge 9 is passed, the controller adjusts the opening of the control valve in a linkage manner according to the real-time pressure value condition in the containment 1 detected by the first pressure gauge 1 so as to continuously supply air to the containment, thereby maintaining the pressure in the containment to be always equal to the test pressure, meanwhile, the flow value of the air supply gas in the constant pressure test pipeline 12 is detected by the first flow meter 6 and is transmitted to the memory 2, and the first calculation module in the data processing terminal 3 calculates the estimated value of the containment leakage rate (namely, the measured volume leakage rate) according to the flow value of the air supply gas stored in the memory.

(4) Meanwhile, the temperature sensor 14 and the humidity sensor 15 are used for detecting the temperature value and the humidity value in the containment 1 and transmitting the temperature value and the humidity value to the memory 2, and the second computing module in the data processing terminal 3 stores the temperature value and the humidity value in the memory 2The third calculation module in the data processing terminal 3 calculates the containment leakage rate, compares the calculated containment leakage rate with the maximum allowable leakage rate La to judge that the pressure in the containment reaches the stable boundary condition, and then starts formal test data recording, for example, calculates the compensated leakage rate L in the last hour ₁ And compensated leak rate L over the last two hours ₂ When L is present ₁ ＞L ₂ And L is ₁ -L ₂ And if the pressure in the containment vessel is less than 0.25La, wherein La is the maximum allowable leakage rate, and is set according to the actual condition, the pressure in the containment vessel is judged to meet the stable boundary condition.

(5) Continuously collecting various required flow values, temperature values, humidity values and other data within a certain time (such as 24h), and calculating the containment leakage rate (recorded as the body leakage rate) within 24 h.

(6) Opening a third isolation valve 17, connecting a verification pipeline 16, superposing a known reference leakage rate (obtained by calculation according to data detected by a second flowmeter) on the basis of the containment leakage rate obtained by calculation in the step (5), calculating according to the steps (1) to (5) to obtain the containment leakage rate (marked as the total leakage rate) in 24h after superposing the reference leakage rate, calculating the measured leakage rate (namely the total leakage rate-the body leakage rate) of the verification pipeline, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation of the measured leakage rate and the reference leakage rate.

It should be noted that the containment leakage rate measurement test system of the present embodiment may be used for measuring containment leakage by the constant pressure method, and may also be used for measuring containment leakage rate by the conventional pressure drop method, where the process is as follows:

(1) starting each detector (such as the first pressure gauge 9 and the first flow meter 6), transmitting data such as detected flow values and pressure values to the memory 2 and the controller, starting the data processing terminal 3, and running the acquisition and analysis software, wherein a calculation model of a pressure drop method is arranged in the acquisition and analysis software, which is not described herein again.

(2) An upstream gas source is connected, the first isolation valve 11 is opened, and compressed gas is filled into the containment through the pressurizing pipeline 12 to increase the pressure in the containment.

(3) When the pressure in the containment vessel 1 exceeds the test pressure or more, for example, 10KPa, the first isolation valve 11 is closed to stop the inflation of the containment vessel.

(4) The pressure in the containment vessel is reduced along with the leakage of the gas in the safety vessel, the real-time pressure value in the containment vessel 1 detected by the first pressure gauge 9 is used, the containment vessel leakage rate in a certain time is calculated by the first calculation module, the second calculation module and the third calculation module, the calculated containment vessel leakage rate is compared with the maximum allowable leakage rate La to judge that the pressure in the containment vessel reaches the stable boundary condition, and then formal test data recording is started, for example, the containment vessel leakage rate L in the last hour is calculated ₃ And containment leak rate L over the last two hours ₃ When L is present ₃ ＞L ₄ And L is ₃ -L ₄ And if the pressure in the containment vessel is less than 0.25La, wherein La is the maximum allowable leakage rate, and is set according to the actual condition, the pressure in the containment vessel is judged to meet the stable boundary condition.

(5) Continuously collecting data such as various required flow values within a certain time (such as 24h), and calculating the containment leakage rate (recorded as the body leakage rate) within 24 h.

(6) Opening a third isolation valve 17, connecting a verification pipeline 16, superposing a known reference leakage rate (obtained by calculation according to data detected by a second flowmeter) on the basis of the containment leakage rate obtained by calculation in the step (5), calculating according to the steps (1) to (5) to obtain the containment leakage rate (marked as the total leakage rate) in 24h after superposing the reference leakage rate, calculating the measured leakage rate (namely the total leakage rate-the body leakage rate) of the verification pipeline, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation of the measured leakage rate and the reference leakage rate.

The containment leakage rate measurement test system of the embodiment adopts a constant pressure method containment leakage rate measurement technology, can be completed under the condition of maintaining the pressure inside a containment constant, and is kept to be continuously inflated in the measurement process so as to keep the pressure inside the containment constant. Moreover, the system fully focuses on the influence of temperature change and humidity change on containment leakage rate measurement in the measurement process, and can give a proper acquisition period to calculate temperature compensation and humidity compensation by combining the characteristics of continuous change of temperature and humidity, namely, the calculation model of the containment leakage rate in the system analyzes the gas really leaked in the containment.

Example 3

As shown in fig. 1, the embodiment discloses a containment leakage rate measurement test system, which can measure the containment leakage rate by a constant pressure method, and includes an air inlet pipeline 4, a data acquisition and processing device, and a constant pressure control assembly 5, wherein:

the air inlet pipeline 4 is communicated with the containment vessel 1 and is used for introducing gas (such as air and compressed air) into the containment vessel;

the data acquisition processing device is electrically connected with the constant pressure control component 5 and is used for acquiring the real-time pressure value in the containment vessel 1, and transmits it to a constant pressure control assembly 5, the constant pressure control assembly 5 is provided on the air intake line 4, is used for receiving the real-time pressure value transmitted by the data acquisition and processing device, comparing the real-time pressure value with a test pressure value preset in the constant pressure control component 5, adjusting the opening degree of the air inlet pipeline 4 according to the comparison result to control the flow value of the gas introduced into the containment 1, so as to maintain the real-time pressure value in the containment vessel equal to the test pressure value, the data acquisition and processing device is also used for acquiring the flow value of the gas required to be introduced into the containment vessel to maintain the real-time pressure value in the containment vessel 1 equal to the test pressure value, and calculating the containment leakage rate according to the flow value data of the gas and the temperature value and/or the humidity value in the containment.

In some embodiments, the data acquisition and processing device comprises a detector, the data processing terminal 3, the detector comprising a first pressure gauge 9, a first flow meter 6, and a temperature sensor 14 and/or a humidity sensor 15, wherein: the first pressure gauge 9 is arranged in the containment vessel 1, is respectively and electrically connected with the data processing terminal 3 and the constant pressure control assembly, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel and transmit the real-time pressure value to the data processing terminal and the constant pressure control assembly; the first flowmeter 6 is arranged on the air inlet pipeline 4, is electrically connected with the data processing terminal 3, and is used for detecting the gas flow in the air inlet pipeline 4, so as to acquire the flow value of the gas and transmit the flow value to the data processing terminal 3; the number of the temperature sensors 14 is multiple, the containment 1 is divided into a plurality of blocks (for example, a), the plurality of temperature sensors 14 are respectively arranged at each block of the containment 1 and electrically connected with the data processing terminal 3, and the temperature sensors are used for detecting the real-time temperature of each block of the containment 1 so as to acquire and obtain the temperature value of each block of the containment 1 and transmit the temperature value to the data processing terminal 3; the number of the humidity sensors 15 is multiple, the humidity sensors 15 are respectively arranged at each block of the containment vessel 1 and are electrically connected with the data processing terminal 3, and the humidity sensors are used for detecting the real-time humidity of each block of the containment vessel 1, so as to acquire the humidity value of each position of the containment vessel and transmit the humidity value to the data processing terminal 3; and the data processing terminal 3 is used for calculating the containment leakage rate according to the flow value, the temperature value and/or the humidity value of the gas.

In some embodiments, the data acquisition and processing device further includes a memory 2 (such as a signal data acquisition unit), and the first pressure gauge 9 is electrically connected to the data processing terminal 3 through the memory 2 to transmit the acquired real-time pressure value to the memory; the first flowmeter 6 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the acquired flow value of the gas to the memory; the temperature sensor 14 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the acquired temperature value to the memory; the humidity sensor 15 is electrically connected with the data processing terminal 3 through the memory 2 so as to transmit the collected humidity value to the memory; the memory 2 is used for storing and displaying the real-time pressure value transmitted by the first pressure gauge 9, the flow value of the gas transmitted by the first flow meter 6, the temperature value transmitted by the temperature sensor 14 and the humidity value transmitted by the humidity sensor, and transmitting the flow value, the temperature value and the humidity value of the gas to the data processing terminal to calculate the safe leakage rate.

In this embodiment, the constant pressure control assembly 5 includes a control valve and a controller, the control valve is disposed on the air intake pipeline 4 and is used for controlling the flow rate of the air in the air intake pipeline; the controller is electrically connected with the first pressure gauge 9 and the control valve respectively, the test pressure value is arranged in the controller, the controller is used for receiving the real-time pressure value in the containment detected by the first pressure gauge 9, comparing the real-time pressure value with the test pressure value, and adjusting the opening of the control valve according to the comparison result so as to maintain the real-time pressure value in the containment equal to the test pressure value.

In this embodiment, the air inlet pipeline 4 includes a pressurizing pipeline 10 and a constant pressure testing pipeline 12, the pressurizing pipeline 10 and the constant pressure testing pipeline 12 are arranged in parallel, both are communicated with the containment 1, wherein: the pressurizing pipeline 10 is used for inflating the containment before a test is started so as to enable a real-time pressure value in the containment 1 to quickly reach a test pressure value, a first isolation valve 11 is arranged on the pressurizing pipeline 10, and the first isolation valve 11 is used for controlling the on-off of the pressurizing pipeline 10 so as to inflate the containment; the constant pressure test pipeline 12 is used for supplementing air into the containment vessel in the test process so as to maintain the real-time pressure value in the containment vessel 1 equal to the test pressure value, a second isolation valve 13 is arranged on the constant pressure test pipeline 12, and the second isolation valve 13 is used for controlling the on-off of the constant pressure test pipeline 12 so as to supplement air; the control valve is arranged on the constant pressure test pipeline 12 and used for adjusting the flow of the air supplement gas in the constant pressure test pipeline 12, and the first flow meter 6 is arranged on the constant pressure test pipeline 12 and used for detecting the flow value of the air supplement gas in the constant pressure test pipeline 12 so as to obtain the flow value of the gas required to be introduced for maintaining the real-time pressure value in the containment equal to the test pressure value.

According to the flow values of the air make-up gas in the constant-pressure test pipeline 12 detected at different moments, the estimated value of the containment leakage rate (namely, the measured volume leakage rate) can be calculated, and under the condition that the influences of factors such as temperature, humidity and the like are not considered, the estimated value of the containment leakage rate can be used as the containment leakage detected by the system.

In some embodiments, the detector may further comprise a second pressure gauge 7 and a first temperature gauge 8, the second pressure gauge 7 being provided with a constant pressure test line 12, and being electrically connected to the reservoir 2, for detecting the pressure value in the constant pressure test pipeline 12 and transmitting the pressure value to the memory 2, the memory 2 is also used for receiving the pressure value in the constant pressure test pipeline 12 detected by the second pressure gauge 7 and storing and displaying the pressure value, the first thermometer 8 is arranged on the constant pressure test pipeline 12 and is electrically connected with the memory 2, the data processing terminal 3 is used for detecting the temperature value in the constant pressure test pipeline 12 and transmitting the temperature value to the memory 2, the memory 2 is also used for receiving the temperature value in the constant pressure test pipeline 12 detected by the first thermometer 8, storing and displaying the temperature value, and the data processing terminal 3 is used for calculating the containment leakage rate according to the flow value, the temperature value and/or the humidity value of the gas, and specifically comprises the following steps: the data processing terminal 3 converts the flow value of the air make-up gas in the constant pressure test pipeline 12 into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the constant pressure test pipeline 12 stored in the memory 2, and then calculates the containment leakage rate according to the flow value under the standard working condition environment or the containment working condition environment obtained through conversion, the temperature value output by the temperature sensor and the humidity value transmitted by the humidity sensor.

It should be noted that the constant pressure control assembly may also maintain the real-time pressure value in the containment equal to the test pressure value by using the following principle: the second pressure gauge detects the pressure of the constant pressure test pipeline and transmits the pressure to the controller, and the controller adjusts the opening of the control valve according to the pressure value data detected by the second pressure gauge so as to control the flow of the air supplement gas in the constant pressure test pipeline and ensure that the real-time pressure in the containment is constant and equal to the test pressure.

In some embodiments, the data processing terminal comprises a fourth calculation module and a fifth calculation module, wherein the fourth calculation module is electrically connected with the first flowmeter 6, the temperature sensor 14 and/or the humidity sensor 15 respectively and is used for calculating the t value of each block according to the flow value, the temperature value and/or the humidity value _i To t _i+1 Volumetric leak rate over time; the fifth calculation module is electrically connected with the fourth calculation module and is used for calculating the block length t according to each block _i To t _i+1 Volume leakage rate of time segment is calculated at t for each block _i To t _i+1 And obtaining the containment leakage rate by mass leakage rate of the time period.

In some embodiments, the fourth calculation module stores a calculation of each partition at t _i To t _i+1 Volume leakage rate of time period

The calculation formula (2) is specifically as follows:

wherein a represents the number of partitions, L _in，i+1 Denotes the t-th _i+1 The filling volume flow, T, at the outlet of the line filled with gas at a time (i.e. the constant pressure test line 12 in this context) _c，i+1，j Denotes the jth block at t _i+1 Absolute temperature of gas in containment at time, T _c，i，j Denotes the jth block at t _i Absolute temperature of gas in containment vessel at time m _c，i，j Denotes the jth block at t _i Mass of gas (mixture of gases) in containment at time, R _{g，eq，i，j} Denotes the jth block at t _i Reduced gas constant, P, of the gas (mixture) in the containment at the moment _c Representing the pressure of the gas at the outlet/in-containment of the gas-filled line, at representing t _i Time to t _i+1 Time length of time, V _c，i，j Represents the volume corresponding to the jth block, H _c，i+1，j Denotes the jth block at t _i+1 Instantaneous relative humidity in the containment, H _c，i，j Denotes the jth block at t _i Relative humidity in Containment at time, f (T) _c，i+1，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in the containment at time f (T) _c，i，j ) Denotes the jth block at t _i+1 The saturated vapor partial pressure in the containment at that moment;

the fifth calculation module stores and calculates each block at t _i To t _i+1 Mass leakage rate of time segment G _out，i+1j The calculation formula of (A) is as follows:

wherein j represents the jth block, i represents the tth block _i Time of day or t _i To t _i+1 Time period, a denotes the number of blocks, L _in，i+1 Denotes the t-th _i+1 Inflation volume flow, T, at the outlet of the line which is constantly inflated _c，i+1，j Denotes the jth block at t _i+1 Absolute temperature of gas in containment at time, T _c，i，j Denotes the jth block at t _i Absolute temperature of gas in containment vessel at time m _c，i，j Denotes the jth block at t _i Mass of gas (mixture of gases) in containment at time, R _{g，eq，i，j} Denotes the jth block at t _i Reduced gas constant, P, of the gas (mixture of gases) in the containment at that moment _c Representing the pressure of the gas at the outlet/in-containment of the gas-filled line, at representing t _i Time to t _i+1 Time length of time, V _c，i，j Represents the volume corresponding to the jth block, H _c，i+1，j Denotes the jth block at t _i+1 Instantaneous relative humidity in the containment, H _c，i，j Denotes the jth block at t _i Relative humidity in Containment at time, f (T) _c，i+1，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in the containment at time f (T) _c，i，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in containment vessel at time, R _{g，eq，i+1，j} Denotes the jth block att _i+1 The reduced gas constant of the gas in the containment at the moment.

In some embodiments, the system further includes a verification line 16 for verifying the accuracy of the calculated containment leak rate after the containment leak rate is calculated. The verification pipeline 16 is provided with a third isolation valve 17, and the third isolation valve 17 is used for controlling the on-off and the opening of the verification pipeline; the detector also comprises a second flowmeter 18, the second flowmeter 18 is arranged on the verification pipeline 16, is electrically connected with the data processing terminal 3 through the memory 2, and is used for detecting the flow value data of the gas in the verification pipeline 16 and transmitting the flow value data to the memory for storage and display; the data processing terminal 3 is also arranged to determine a reference leak rate (in particular calculated from the flow value data detected by the second flowmeter 18, by opening the third isolating valve 17) from the flow value of the gas in the verification line 16 stored in the memory 2, and recalculating the containment leakage rate on the basis of the superposed reference leakage rate to obtain the containment leakage rate (recorded as the total containment leakage rate) after the superposed reference leakage, and, calculating a measured leakage rate (the measured leakage rate is containment leakage after the reference leakage is superposed-containment leakage rate before the reference leakage is superposed) according to the containment leakage rate before the reference leakage is superposed and the containment leakage rate after the reference leakage is superposed, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation between the measured leakage rate and the reference leakage rate.

In some embodiments, the detector further comprises a third pressure gauge 19, a second temperature gauge 20, wherein: the third pressure gauge 19 is arranged on the verification pipeline 16 and is electrically connected with the memory 2, and the third pressure gauge 19 is used for detecting the pressure value of the gas in the verification pipeline 16 and transmitting the pressure value to the memory 2 for storage and display; the second thermometer 20 is arranged on the verification pipeline 16, is electrically connected with the memory 2, and is used for detecting the temperature value in the verification pipeline 20 and transmitting the temperature value to the memory 2 for storage and display; the above determining the reference leak rate according to the flow value of the gas in the verification line 16 stored in the memory 2 specifically includes: the data processing terminal 3 converts the flow value of the gas in the verification pipeline 16 into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the verification pipeline 16 stored in the memory 2, and then calculates the reference leakage rate according to the flow value of the gas in the verification pipeline 16 under the standard working condition environment or the containment working condition environment.

The following details the measurement process of the containment leakage rate measurement test system of the present embodiment, specifically as follows:

(1) various detectors (e.g., the first flow meter 6, the first pressure meter 9, the temperature sensor 14, the humidity sensor, etc.) are turned on, data such as detected flow values, temperature values, and humidity values are transmitted to the memory 2 and the controller, and the data processing terminal 3 is turned on to run acquisition and analysis software.

(2) An upstream gas source is connected, the first isolation valve 11 is opened, and compressed gas is filled into the containment 1 through the pressurizing pipeline 10 so as to raise the pressure in the containment.

(3) When the pressure in the containment reaches the test pressure, closing the first isolation valve 11, opening the second isolation valve 13, switching the pressurizing pipeline 10 to the constant-pressure test pipeline 12, detecting the real-time pressure value in the containment 1 through the first pressure gauge 9, adjusting the opening of the control valve by the controller according to the real-time pressure value condition in the containment 1 detected by the first pressure gauge 1 to continuously supply air into the containment so as to maintain the pressure in the containment always equal to the test pressure, detecting the flow value of the air supplied into the constant-pressure test pipeline 12 through the first flow meter 6 and transmitting the flow value to the memory 2, detecting the temperature value and the humidity value in the containment 1 through the temperature sensor 14 and the humidity sensor 15 and transmitting the temperature value and the humidity value to the memory 2, and transmitting a fourth calculation module in the data processing terminal 3 according to the flow value of the air stored in the memory 2, Calculating the volume leakage rate in a certain time period by using the temperature value and the humidity value, calculating the mass leakage rate by using a third calculation module in the data processing terminal 3 to obtain the containment leakage rate, comparing the containment leakage rate obtained by calculation with the maximum allowable leakage rate La to judge that the pressure in the containment reaches a stable boundary condition, and then beginning to formally calculateFor example, calculating the compensated leak rate L in the last hour ₁ And compensated leak rate L over the last two hours ₂ When L is present ₁ ＞L ₂ And L is ₁ -L ₂ And if the pressure in the containment vessel is less than 0.25La, wherein La is the maximum allowable leakage rate, and is specifically set according to the actual condition, the condition that the pressure in the containment vessel reaches the stable boundary condition is judged to be met.

(5) Continuously collecting various required flow values, temperature values, humidity values and other data within a certain time (such as 24h), and calculating the containment leakage rate (recorded as the body leakage rate) within 24 h.

(6) Opening a third isolation valve 17, connecting a verification pipeline 16, superposing a known reference leakage rate (obtained by calculation according to data detected by a second flowmeter) on the basis of the containment leakage rate obtained by calculation in the step (5), calculating according to the steps (1) to (5) to obtain the containment leakage rate (marked as the total leakage rate) in 24h after superposing the reference leakage rate, calculating the measured leakage rate (namely the total leakage rate-the body leakage rate) of the verification pipeline, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation of the measured leakage rate and the reference leakage rate.

It should be noted that the containment leakage rate measurement test system of the present embodiment may be used for measuring containment leakage by the constant pressure method, and may also be used for measuring containment leakage rate by the conventional pressure drop method, where the process is as follows:

(1) starting each detector (such as the first pressure gauge 9 and the first flow meter 6), transmitting data such as detected flow values and pressure values to the memory 2 and the controller, starting the data processing terminal 3, and running the acquisition and analysis software, wherein a calculation model of a pressure drop method is arranged in the acquisition and analysis software, which is not described herein again.

(2) An upstream gas source is connected, the first isolation valve 11 is opened, and compressed gas is filled into the containment vessel through the charging pipeline 12 so as to raise the pressure in the containment vessel.

(3) When the pressure in the containment vessel 1 exceeds the test pressure or more, for example, 10KPa, the first isolation valve 11 is closed to stop the inflation of the containment vessel.

(4) The pressure in the containment vessel is reduced along with the leakage of the gas in the safety vessel, the real-time pressure value in the containment vessel 1 detected by the first pressure gauge 9 is used, the containment vessel leakage rate in a certain time is calculated by the fourth calculation module and the fifth calculation module, the calculated containment vessel leakage rate is compared with the maximum allowable leakage rate La to judge that the pressure in the containment vessel reaches the stable boundary condition, and then formal test data recording is started, for example, the containment vessel leakage rate L in the last hour is calculated ₃ And containment leak rate L over the last two hours ₃ When L is present ₃ ＞L ₄ And L is ₃ -L ₄ And if the pressure in the containment vessel is less than 0.25La, wherein La is the maximum allowable leakage rate, and is set according to the actual condition, the pressure in the containment vessel is judged to meet the stable boundary condition.

(5) Continuously collecting data such as various required flow values within a certain time (such as 24h), and calculating the containment leakage rate (recorded as the body leakage rate) within 24 h.

(6) Opening a third isolation valve 17, connecting a verification pipeline 16, superposing a known reference leakage rate (obtained by calculation according to data detected by a second flowmeter) on the basis of the containment leakage rate obtained by calculation in the step (5), calculating according to the steps (1) to (5) to obtain the containment leakage rate (marked as the total leakage rate) in 24h after superposing the reference leakage rate, calculating the measured leakage rate (namely the total leakage rate-the body leakage rate) of the verification pipeline, comparing the measured leakage rate with the reference leakage rate, and judging the accuracy and reliability of the containment leakage rate measured by the system according to the deviation of the measured leakage rate and the reference leakage rate.

The containment leakage rate measurement test system of the embodiment adopts a constant pressure method containment leakage rate measurement technology, can be completed under the condition of maintaining the pressure inside a containment constant, and is kept to be continuously inflated in the measurement process so as to keep the pressure inside the containment constant. Moreover, the system fully focuses on the influence of temperature change and humidity change on containment leakage rate measurement in the measurement process, and can give a proper acquisition period to calculate temperature compensation and humidity compensation by combining the characteristics of continuous change of temperature and humidity, namely, the calculation model of the containment leakage rate in the system analyzes the gas really leaked in the containment.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (18)

1. A containment leakage rate measurement test system is characterized by comprising an air inlet pipeline (4), a data acquisition and processing device and a constant pressure control assembly (5),

the gas inlet pipeline is communicated with the containment (1) and is used for introducing gas into the containment;

the data acquisition processing device is electrically connected with the constant pressure control assembly and is used for acquiring a real-time pressure value in the containment and transmitting the real-time pressure value to the constant pressure control assembly;

the constant pressure control assembly is arranged on the gas inlet pipeline and used for receiving the real-time pressure value, comparing the real-time pressure value with a test pressure value preset in the gas inlet pipeline, and adjusting the opening of the gas inlet pipeline according to a comparison result to control the flow value of gas introduced into the containment vessel so as to maintain the real-time pressure value in the containment vessel equal to the test pressure value;

the data acquisition and processing device is also used for acquiring a flow value of gas required to be introduced into the containment vessel and for maintaining the real-time pressure value in the containment vessel to be equal to the test pressure value, and a temperature value and/or a humidity value in the containment vessel, and calculating the containment vessel leakage rate according to the flow value of the gas, the temperature value and/or the humidity value.

2. The containment leak rate measurement testing system of claim 1, wherein the data acquisition and processing device comprises a detector, a data processing terminal (3), the detector comprising a first pressure gauge (9), a first flow meter (6), and a temperature sensor (14) and/or a humidity sensor (15), wherein:

the first pressure gauge is arranged in the containment vessel, is respectively and electrically connected with the data processing terminal and the constant pressure control assembly, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel and transmit the real-time pressure value to the data processing terminal and the constant pressure control assembly;

the first flowmeter is arranged on the gas inlet pipeline, is electrically connected with the data processing terminal, and is used for detecting the gas flow in the gas inlet pipeline so as to acquire and obtain a flow value of the gas and transmit the flow value to the data processing terminal;

the temperature sensor is arranged in the containment vessel, is electrically connected with the data processing terminal, and is used for detecting the real-time temperature in the containment vessel so as to acquire and obtain a temperature value in the containment vessel and transmit the temperature value to the data processing terminal;

the humidity sensor is arranged in the containment vessel, is electrically connected with the data processing terminal, and is used for detecting the real-time humidity in the containment vessel so as to acquire and obtain a humidity value in the containment vessel and transmit the humidity value to the data processing terminal;

and the data processing terminal is used for calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value.

3. The containment leakage rate measurement test system according to claim 2, wherein the number of the temperature sensors is multiple, and the multiple temperature sensors are respectively arranged at different positions in the containment, so that the internal space of the containment is divided into multiple virtual temperature zones to acquire temperature values of different temperature zones in the containment;

the number of the humidity sensors is multiple, the humidity sensors are respectively arranged at different positions in the containment vessel, so that the internal space of the containment vessel is divided into a plurality of virtual humidity partitions, and the humidity values of different humidity partitions in the containment vessel are acquired.

4. The containment leak rate measurement testing system of claim 3, wherein the data processing terminal comprises a first calculation module, a second calculation module, and a third calculation module,

the first calculation module is electrically connected with the first flowmeter and used for calculating the measurement volume leakage rate according to the flow value of the gas;

the second calculation module is electrically connected with the temperature sensor and/or the humidity sensor and is used for calculating a compensation volume leakage rate according to the temperature value and/or the humidity value;

the third calculation module is electrically connected with the first calculation module and the second calculation module respectively and used for calculating the actual volume leakage rate according to the measured volume leakage rate and the compensated volume leakage rate and calculating the mass leakage rate according to the actual volume leakage rate so as to obtain the containment leakage rate.

5. The containment leak rate measurement testing system of claim 4, wherein the first calculation module stores a measured volumetric leak rate L in a standard operating environment _{Measuring, N sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measure, P ∑ i} To representT under the test condition environment _i Cumulative measured volume leakage rate, P, for all zones at that time ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

represents t _i-1 To t _i The effective specific temperature within the containment during the time period,

and/or the measured volume leakage rate L under the standard working condition environment _{Measuring, N sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time _Ai Representing the real-time pressure, P, at the first flow meter in the supplied air environment _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature within the containment over a period of time;

and/or the first calculation module stores the measured volume leakage rate L under the test working condition environment _{Measuring, p sigma} The calculation formula (2) is specifically as follows:

wherein，L _{Measure, P ∑ i} Showing the test condition at t _i The cumulative measured volumetric leak rate for all zones at that time.

6. The containment leak rate measurement test system according to claim 5, wherein the second calculation module calculates the compensated volume leak rate according to the temperature value and/or the humidity value, specifically, the compensated volume leak rate is obtained by accumulating the temperature value and the humidity value of each partition in the containment at different times after calculation respectively,

the second calculation module is internally stored with a compensation volume leakage rate L under the test working condition environment _{Complement, P sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time periods or cycles, m represents the number of humidity zones, i represents t _i Time of day or t _i-1 To t _i Time period, j denotes the jth temperature zone or jth humidity zone, k denotes the number of temperature zones, H _ji Denotes the jth humidity zone at t _i Relative humidity at the moment H _ji-1 Denotes the jth humidity zone at t _i-1 Relative humidity at the moment P _Hji Denotes the jth humidity zone at t _i Saturated partial pressure of water vapor at time, P _Hji-1 Denotes the jth humidity zone at t _i-1 Saturated partial pressure of water vapour at time, V _Hj Denotes the percentage of the jth humidity zone to the free volume of the containment vessel, V ₀ Representing the free volume of the containment vessel, P ₀ Denotes the test pressure,. DELTA.t denotes t _i-1 To t _i Time length of time, T _ji Denotes the j temperature zone at t _i Absolute temperature at time, T _ji-1 Denotes the j temperature zone at t _i-1 Absolute temperature of moment, V _Tj Representing the percentage of the jth temperature zone in the free volume of the containment vessel;

and/or the second computing module is internally stored with compensation under the standard working condition environmentVolume leakage rate L _{Complement, N sigma} The calculation formula (2) is specifically as follows:

wherein n represents the number of time periods or cycles, m represents the number of humidity zones, i represents t _i Time of day or t _i-1 To t _i Time period, j denotes the jth temperature zone or jth humidity zone, k denotes the number of temperature zones, H _ji Denotes the jth humidity zone at t _i Relative humidity at the moment H _ji-1 Denotes the jth humidity zone at t _i-1 Relative humidity at the moment P _Hji Denotes the jth humidity zone at t _i Saturated partial pressure of water vapor at time, P _Hji-1 Denotes the jth humidity zone at t _i-1 Saturated partial pressure of water vapour at time, V _Hj Represents the percentage of the jth humidity zone in the free volume of the containment vessel, V ₀ Representing the free volume of the containment vessel, P ₀ Denotes the test pressure, P _N Denotes the pressure in the environment of the standard working condition, and Δ t denotes t _i-1 To t _i Time length of time, T _N Indicating the temperature, T, in the environment of the standard operating mode _Hji-1 Denotes the jth humidity zone at t _i-1 Absolute temperature at time, T _Hji Denotes the jth humidity zone at t _i Absolute temperature at time, T _ji Denotes the j temperature zone at t _i Absolute temperature at time, T _ji-1 Denotes the j temperature zone at t _i-1 Absolute temperature of moment, V _Tj Represents the percentage of the j temperature zone to the free volume of the containment vessel.

7. The containment leak rate measurement test system of claim 6, wherein the third computing module stores therein an actual volumetric leak rate L under a test condition environment _{Real, P sigma} The calculation formula (2) is specifically as follows:

L _{real, P sigma} ＝L _{Measuring, P sigma} +L _{Complement, P sigma}

And/or, the saidThe third calculation module is internally stored with the actual volume leakage rate L under the standard working condition environment _{Real, N sigma} The calculation formula (2) is specifically as follows:

L _{real, N sigma} ＝L _{Measuring, N sigma} +L _{Complement, N sigma}

The subscript N represents a standard working condition environment, the subscript P represents a test working condition environment, and the subscript sigma-sigma table accumulates all partitions at all times.

8. The containment leak rate measurement testing system according to claim 7, wherein the third calculation module further stores a calculation formula of mass leak rate, specifically comprising:

calculating mass leakage rate M in delta t time under standard working condition environment _∑i The calculation formula (2) is specifically as follows:

wherein L is _{Real, N Σ i} Indicating the standard working condition environment at t _i Cumulative actual volume leakage rate, m, for all zones at that time _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average partial pressure of water vapour at the moment,

denotes t _i-1 The average partial pressure of water vapour at the moment,

represents t _i Mean partial pressure of water vapor at the time, R represents the ideal gas constant, P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

or calculating the mass leakage rate M within a delta t time under the test working condition environment _∑i The calculation formula (2) is specifically as follows:

wherein L is _{True, P Σ i} Showing the test condition at t _i Cumulative actual volumetric leakage rate, m, for all zones at any time _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average partial pressure of water vapour at the moment,

represents t _i-1 Mean partial pressure of water vapor at the time, R represents the ideal gas constant, P ₀ Denotes the test pressure, P _N The pressure in the environment of the standard working condition is shown,

represents t _i To t _i-1 Effective specific temperature in the containment over a period of time;

calculating the total mass leakage rate M in a plurality of continuous delta t times _∑∑ The calculation formula of (c) is specifically as follows:

wherein n represents the number of time segments or cycles, and i represents t _i Time of day or t _i-1 To t _i A time period.

9. The containment leak rate measurement testing system of claim 5, wherein the first computing module has stored therein measurements in a standard operating environmentVolumetric leakage rate L _{Measuring, N ∑ i} The calculation formula (2) is specifically as follows:

wherein L is _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time _Ai Representing the real-time pressure, P, at the first flow meter in the supplied air environment _N Indicating the pressure, T, in the environment of the standard operating conditions _N The temperature in the environment of the standard operating condition is shown,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

and/or measuring volume leakage rate L under the environment of test working condition _{Measuring, P sigma i} The calculation formula (2) is specifically as follows:

wherein i represents t _i Time of day or t _i-1 To t _i Period of time, L _{Measuring, A sigma i} Denotes the gas supply environment at t _i Cumulative measured volume leakage rate, P, for all zones at that time ₀ Denotes the test pressure, P _Ai Representing the real-time pressure at the first flow meter in the supplied air environment,

represents the average temperature in the containment under the test environment,

denotes the gas supply environment at t _i-1 To t _i Effective specific temperature in the containment over a period of time;

the second calculation module is used for calculating the temperature value and/or the temperature valueSpecifically, the calculation of the compensation volume leakage rate is to calculate the compensation volume leakage rate according to the average temperature value and the average humidity value of each subarea in the containment, and the containment leakage rate L in the test working condition environment is stored in the second calculation module _{Complement, P ∑ i} The calculation formula (2) is specifically as follows:

wherein, the first and the second end of the pipe are connected with each other,

is shown at t _i The average relative humidity of all the zones at the moment,

is shown at t _i The average saturated water vapor partial pressure of all the partitions at that time,

is shown at t _i-1 The average relative humidity of all the zones at the moment,

is shown at t _i-1 The average saturated water vapor partial pressure of all the partitions at that time,

represents t _i The average temperature at the time of day is,

represents t _i-1 Mean temperature at time, V ₀ Represents the free volume of the containment vessel, Δ t represents t _i-1 To t _i The time length of the moment;

and/or the second calculation module is internally stored with a containment leakage rate L in a standard working condition environment _{Complement, N Σ i} Calculation formula ofThe body is as follows:

wherein the content of the first and second substances,

is shown at t _i The average relative humidity of all the zones at the time,

is shown at t _i The average saturated water vapor partial pressure of all the partitions at that time,

is shown at t _i-1 The average relative humidity of all the zones at the moment,

is shown at t _i-1 The average saturated water vapor partial pressure of all the partitions at that time,

represents t _i The average temperature at the time of day is,

represents t _i-1 Mean temperature at time, V ₀ Represents the free volume of the containment vessel, Δ t represents t _i-1 To t _i Time length of time, P ₀ Denotes the test pressure, P _N Indicating the pressure, T, in the environment of the standard operating conditions _N Indicating the temperature under the environment of standard working conditions;

the third calculation module is internally stored with the actual volume leakage rate L under the standard working condition environment _{Real, N Σ i} The calculation formula (2) is specifically as follows:

L _{real, N Σ i} ＝L _{Measuring, N ∑ i} +L _{Complement, N Σ i}

And/or the third calculation module is internally stored with the actual volume leakage rate L under the test working condition environment _{True, P Σ i} The calculation formula of (c) is specifically as follows:

L _{true, P Σ i} ＝L _{Measuring, P sigma i} +L _{Complement, P ∑ i}

The third calculation module is also internally stored with a mass leakage rate M under a standard working condition environment _N∑i The calculation formula (2) is specifically as follows:

wherein m is _{Qi (Qi)} Represents the molar mass of air, m _{Water (W)} Which represents the molar mass of the water vapor,

represents t _i The average water vapor partial pressure at the time, R, represents the ideal gas constant;

and/or the third calculation module is also internally stored with a mass leakage rate M under the test working condition environment _P∑i The calculation formula (2) is specifically as follows:

wherein m is _{Qi (Qi)} Represents the molar mass of air, m _{Water (I)} Which represents the molar mass of the water vapor,

represents t _i The average water vapor partial pressure at that time, R, represents the ideal gas constant.

10. The containment leak rate measurement testing system of claim 1, characterized in that the data acquisition and processing device comprises a detector, a data processing terminal (3),

the detector comprises a first pressure gauge (9), a first flow meter (6), and a temperature sensor (14) and/or a humidity sensor (15), wherein:

the first pressure gauge is arranged in the containment vessel, is respectively and electrically connected with the data processing terminal and the constant pressure control assembly, and is used for detecting the real-time pressure in the containment vessel so as to acquire and obtain a real-time pressure value in the containment vessel and transmit the real-time pressure value to the data processing terminal and the constant pressure control assembly;

the first flowmeter is arranged on the gas inlet pipeline, is electrically connected with the data processing terminal, and is used for detecting the gas flow in the gas inlet pipeline so as to acquire and obtain a flow value of the gas and transmit the flow value to the data processing terminal;

the safety shell is divided into a plurality of blocks, the plurality of temperature sensors are respectively arranged at each block of the safety shell and are electrically connected with the data processing terminal, and the temperature sensors are used for detecting the real-time temperature of each block of the safety shell so as to acquire and obtain the temperature value of each block of the safety shell and transmit the temperature value to the data processing terminal;

the number of the humidity sensors is multiple, the humidity sensors are respectively arranged at each block of the containment vessel and are electrically connected with the data processing terminal, and the humidity sensors are used for detecting the real-time humidity at each block of the containment vessel so as to acquire and obtain the humidity value at each position of the containment vessel and transmit the humidity value to the data processing terminal;

and the data processing terminal is used for calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value.

11. The containment leak rate measurement testing system of claim 10, wherein the data processing terminal comprises a fourth calculation module, and a fifth calculation module,

the fourth calculation module is respectively and electrically connected with the first flowmeter, the temperature sensor and/or the humidity sensor and is used for calculating the t value of each block according to the flow value, the temperature value and/or the humidity value _i To t _i+1 Volumetric leak rate over time;

the fifth calculation module is electrically connected with the fourth calculation module and is used for calculating the block length t according to each block _i To t _i+1 Volume leakage rate of time segment is calculated at t for each block _i To t _i+1 And obtaining the leakage rate of the containment vessel according to the mass leakage rate of the time period.

12. The containment leak rate measurement test system of claim 11,

the fourth calculation module stores the calculation of each block at t _i To t _i+1 Volume leakage rate of time period

The calculation formula (2) is specifically as follows:

wherein a represents the number of partitions, L _in，i+1 Denotes the t-th _i+1 Inflation volume flow, T, at the outlet of the line constantly inflated with gas _c，i+1，j Denotes the jth block at t _i+1 Absolute temperature of gas in containment at time, T _c，i，j Denotes the jth block at t _i Absolute temperature of gas in containment vessel at time m _c，i，j Denotes the jth block at t _i Mass of gas in containment vessel at time, R _{g，eq，i，j} Denotes the jth block at t _i Reduced gas constant, P, of the gas in the containment at time _c Representing the pressure of the gas at the outlet/in-containment of the gas-filled line, at representing t _i Time to t _i+1 Time length of time, V _c，i，j Represents the volume corresponding to the jth block, H _c，i+1，j Denotes the jth block at t _i+1 Instantaneous relative humidity in the containment, H _c，i，j Denotes the jth block at t _i Relative humidity in containment at time, f (T) _c，i+1，j ) Denotes the jth block at t _i+1 Saturated water vapor fraction at timePressure, f (T) _c，i，j ) Denotes the jth block at t _i+1 The saturated steam partial pressure in the containment vessel at the moment;

the fifth calculation module stores and calculates each block at t _i To t _i+1 Mass leakage rate of time segment G _out，i+1j The calculation formula (2) is specifically as follows:

wherein j represents the jth block, i represents the tth block _i Time of day or t _i To t _i+1 Time period, a denotes the number of blocks, L _in，i+1 Denotes the t-th _i+1 Inflation volume flow, T, at the outlet of the line constantly inflated with gas _c，i+1，j Denotes the jth block at t _i+1 Absolute temperature of gas in containment at time, T _c，i，j Denotes the jth block at t _i Absolute temperature of gas in containment vessel at time m _c，i，j Denotes the jth block at t _i Mass of gas in containment vessel at time, R _{g，eq，i，j} Denotes the jth block at t _i Reduced gas constant, P, of the gas in the containment at time _c Representing the pressure of the gas at the outlet/in-containment of the gas-filled line, at representing t _i To t _i+1 Time length of time, V _c，i，j Denotes the volume corresponding to the jth block, H _c，i+1，j Denotes the jth block at t _i+1 Instantaneous relative humidity in the containment, H _c，i，j Denotes the jth block at t _i Relative humidity in Containment at time, f (T) _c，i+1，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in the containment at time f (T) _c，i，j ) Denotes the jth block at t _i+1 Saturated partial pressure of water vapor in containment vessel at time, R _{g，eq，i+1，j} Denotes the jth block at t _i+1 The reduced gas constant of the gas in the containment at the moment.

13. The containment leak rate measurement testing system of claim 2 or 10, characterized in that the data acquisition and processing device further comprises a memory (2),

the first pressure gauge is electrically connected with the data processing terminal through the memory so as to transmit the acquired real-time pressure value to the memory;

the first flowmeter is electrically connected with the data processing terminal through the memory so as to transmit the acquired flow value of the gas to the memory;

the temperature sensor is electrically connected with the data processing terminal through the memory so as to transmit the acquired temperature value to the memory;

the humidity sensor is electrically connected with the data processing terminal through the memory so as to transmit the collected humidity value to the memory;

the memory is used for storing and displaying the real-time pressure value transmitted by the first pressure gauge, the flow value of the gas transmitted by the first flow meter, the temperature value transmitted by the temperature sensor and the humidity value transmitted by the humidity sensor and transmitting the real-time pressure value, the flow value of the gas transmitted by the first flow meter, the temperature value transmitted by the temperature sensor and the humidity value transmitted by the humidity sensor to the data processing terminal so as to calculate the containment leakage rate.

14. The containment leak rate measurement test system of claim 13, wherein the constant pressure control assembly comprises a control valve and a controller,

the control valve is arranged on the air inlet pipeline and used for controlling the air flow in the air inlet pipeline;

the controller is electrically connected with the first pressure gauge and the control valve respectively, the test pressure value is arranged in the controller, the controller is used for receiving the real-time pressure value in the containment detected by the first pressure gauge and comparing the real-time pressure value with the test pressure value, and then the opening of the control valve is adjusted according to the comparison result so as to maintain the real-time pressure value in the containment equal to the test pressure value.

15. The containment leak rate measurement test system of claim 14, wherein the air intake line comprises a pressurization line (10) and a constant pressure test line (12),

the pressurizing pipeline and the constant pressure testing pipeline are arranged in parallel and are both communicated with the containment vessel, wherein,

the pressurizing pipeline is used for inflating the containment before the test starts so as to enable the real-time pressure value in the containment to quickly reach the test pressure value, and is provided with a first isolating valve (11) which is used for controlling the on-off of the pressurizing pipeline so as to inflate the containment;

the constant pressure test pipeline is used for supplying air into the containment vessel in the test process so as to maintain the real-time pressure value in the containment vessel equal to the test pressure value, a second isolation valve (13) is arranged on the constant pressure test pipeline and is used for controlling the on-off of the constant pressure test pipeline so as to supply the air,

the control valve is arranged on the constant pressure testing pipeline and used for adjusting the flow of the air make-up gas in the constant pressure testing pipeline,

the first flowmeter is arranged on the constant-pressure test pipeline and used for detecting the flow value of the air replenishing gas in the constant-pressure test pipeline so as to obtain the flow value of the gas required to be introduced for maintaining the real-time pressure value in the containment equal to the test pressure value.

16. The containment leak rate measurement test system of claim 15, wherein the detector further comprises a second pressure gauge (7) and a first temperature gauge (8),

the second pressure gauge is arranged on the constant-pressure testing pipeline, is electrically connected with the memory, and is used for detecting the pressure value of the gas in the constant-pressure testing pipeline and transmitting the pressure value to the memory for storage and display;

the first thermometer is arranged on the constant-pressure testing pipeline, is electrically connected with the memory, and is used for detecting the temperature value in the constant-pressure testing pipeline and transmitting the temperature value to the memory for storage and display;

the data processing terminal is used for calculating the containment leakage rate according to the flow value of the gas, the temperature value and/or the humidity value, and specifically comprises the following steps: and the data processing terminal converts the flow value of the air supply gas in the constant pressure test pipeline into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the constant pressure test pipeline stored in the memory, and then calculates the containment leakage rate according to the flow value under the standard working condition environment or the containment working condition environment, the temperature value and the humidity value.

17. The containment leakage rate measurement test system according to claim 16, further comprising a verification pipeline (16), wherein a third isolation valve (17) is arranged on the verification pipeline, and the third isolation valve is used for controlling the on-off and opening degree of the verification pipeline;

the detector also comprises a second flowmeter (18), the second flowmeter is arranged on the verification pipeline, is electrically connected with the data processing terminal through the memory, and is used for detecting the flow value of the gas in the verification pipeline and transmitting the flow value to the memory for storage and display;

the data processing terminal is further used for determining a reference leakage rate according to the flow value of the gas in the verification pipeline stored in the memory, recalculating the containment leakage rate on the basis of the superimposed reference leakage rate to obtain the containment leakage rate after the reference leakage is superimposed, calculating a measured leakage rate according to the containment leakage rate before the reference leakage is superimposed and the containment leakage rate after the reference leakage is superimposed, comparing the measured leakage rate with the reference leakage rate, and verifying the accuracy of the measurement result of the system according to the comparison result.

18. The containment leak rate measurement test system of claim 17, wherein the detector further comprises a third pressure gauge (19), a second temperature gauge (20),

the third pressure gauge is arranged on the verification pipeline, is electrically connected with the memory, and is used for detecting the pressure value of the gas in the verification pipeline and transmitting the pressure value to the memory for storage and display;

the second thermometer is arranged on the verification pipeline, is electrically connected with the memory, and is used for detecting the temperature value of the gas in the verification pipeline and transmitting the temperature value to the memory for storage and display;

the determining of the reference leakage rate according to the flow value of the gas in the verification pipeline stored in the memory specifically comprises: and the data processing terminal converts the flow value of the gas in the verification pipeline into a flow value under a standard working condition environment or a containment working condition environment according to the pressure value and the temperature value of the gas in the verification pipeline stored in the memory, and then calculates the reference leakage rate according to the flow value of the gas in the verification pipeline under the standard working condition environment or the containment working condition environment.

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