KR101925558B1 - Method for Emission Test of Gaseous Extinguishing Agent in Nuclear Power Plant - Google Patents

Abstract

The present invention relates to a method capable of quickly and precisely performing an emission test of a gaseous extinguishing agent in a nuclear power plant in order to correctly check whether extinguishment equipment of a disaster protection area satisfies a performance standard in a fire protection area where gaseous extinguishing equipment widely used in a nuclear power plant. To this end, according to the present invention, the method to test emission of gaseous extinguishing agent in a nuclear power plant comprises: a step (c) of measuring a temperature change time point (Ng) of an emission nozzle with a nozzle temperature sensor (300); a step (d) of transferring the temperature change time point (Ng) of the emission nozzle to a plurality of measurement modules (200) through communication; a step (e) of calculating a time difference (B) between the temperature change time point of each measurement module (200) and the temperature change time point (Ng) of the emission nozzle; a step (f) of measuring a concentration change time point (S), when the concentration of the extinguishing agent is increased, in each measurement module (200); a step (g) of using the concentration change time point (S) and the time difference (B) to select a target time (Tt) in each measurement module (200); and a step (h) of checking whether all concentrations of the extinguishing agent represented in each measurement module (200) at the selected target time (Tt) is equal to or greater than a target concentration (Ct).

Description

TECHNICAL FIELD [0001] The present invention relates to a test method for a gas emission type fire extinguishing agent,

The present invention relates to a system and method for rapidly and accurately performing a fire extinguishing agent test of a nuclear power plant, which is a test for accurately grasping whether or not a gas system fire extinguishing system installed in a protected area of a nuclear power plant (hereinafter referred to as a "nuclear power plant" More particularly, the present invention relates to a method of measuring a temperature of a discharge nozzle, measuring a discharge time point of the discharge nozzle, communicating the discharge time point of the fire extinguishing agent to each measurement module through communication, Determining a target concentration using the temperature change point and the concentration change point, and determining whether a design concentration or a target concentration to be used for determining whether the performance of the fire extinguishing system is suitable at the target time is achieved The present invention relates to a method capable of performing an extinguishing agent release test of a nuclear power plant including a nuclear power plant.

The fire protection zone in which the gas system fire extinguishing equipment is installed is equipped with means for blocking the outside air inflow such as a fire shutter or an automatic closing device for blocking the inflow of outside air in case of fire,

The fire extinguishing agent used in the gas-based fire extinguishing system includes carbon dioxide, halon, nitrogen, argon (Ar), etc., and a high-pressure extinguishing agent container storing the extinguishing agent in a liquid state and a gas state, And fire extinguishing agent container is opened by fire detection signal in case of fire to evolve fire in protected area.

This gas-based fire-extinguishing system stores the fire extinguishing agent in a container. When a fire occurs, the fire extinguishing agent is injected into the fire area to lower the oxygen concentration by making the concentration of the fire extinguishing agent higher than the designed concentration or the target concentration, Therefore, fire suppression performance can not be guaranteed unless design concentration, chemical quantity, and overpressure are controlled.

Gas-based fire extinguishing systems are widely used in nuclear power plants which must be always safe, and the fire extinguishing agents are released into a fire zone to increase the concentration of the fire extinguishing agent to a designed concentration or a target concentration or more to suppress the fire. It is necessary to carry out a release test to confirm that the designed and discharged concentration of the designed fire extinguishing agent is achieved within the time limit after the fire extinguishing agent is installed in the field, .

The US Fire Safety Standard (NFPA 12) requires full emission testing in areas where carbon dioxide fire extinguishing systems are installed, and US Nuclear Power Plants have long since performed full emission testing. In Korea, the significance is emphasized recently and the full emission test is conducted only before the new construction site.

In Korea, the significance of the full emission test is further recognized. KHNP is currently carrying out a project to improve the performance of carbon dioxide fire extinguishing facilities for the 16th nuclear power plant from 2016. The re-installed fire extinguishing equipment is also being tested for release.

However, there were many cases of failed emission experiments due to insufficient experience, procedures, and acceptance criteria for domestic nuclear emission tests, and frequent conflicts with regulatory authorities. It is urgent to establish technological progress and technical standards in order to prove the credibility of fire extinguishing performance as well as the successful performance of the large-scale performance improvement project and the existing problem of obscure criteria and procedures.

As shown in FIG. 1, the existing full-emission test equipment adopts a method of transferring the extinguishing agent by using an air tube inside the protection zone to be tested. The air tube length from the oxygen concentration measurement point to the oxygen concentration analyzer is about 40 m. The air transfer time of the measuring device installed in the field takes 44 to 67 seconds. The air transfer time must reflect this at the concentration measurement time since it is the physical time required for air to reach the analyzer through the hose from the protected area measurement point. However, in the extinguishing agent test, there is a problem in that an excessively long delay time of about 44 to 67 seconds occurs in the air transfer time compared to the extinguishing agent discharge time of 60 seconds.

In addition, the United States Fire Safety Standard (NFPA 12) requires that fire extinguishing agents be released for 60 seconds after the fire extinguishing agent starts to fire within a protected area. Within 60 seconds after the fire extinguishing agent is released, It is necessary to accurately grasp the time of starting the discharge of the extinguishing agent and the response delay time when measuring the concentration of the extinguishing agent gasified in the measuring module. There is a problem that can not be done.

Particularly, in the extinguishing agent release test, as shown in FIG. 1, when measuring the concentration of the extinguishing agent, the concentration of the extinguishing agent is usually measured at at least three points having different heights, And there is little error in response delay time since the concentration of the extinguishing agent which is gasified is rapidly changed before and after the target time for measuring the design concentration or the target concentration and the liquid state extinguishing agent is sufficiently injected into the inside of the protective region There is a problem that the concentration measured at the target time may have a large influence.

Prior art patent documents include an integrated sensing device for temperature, humidity, and carbon dioxide concentration as disclosed in Japanese Patent Application Laid-Open No. 10-2013-0133604, but there is a method of deriving a quick and precise emission test result in the extinguishing agent discharge test Is not clearly shown.

Japanese Patent Application Laid-Open No. 10-2013-0133604 (Published Dec. 2013)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a fire extinguishing agent discharge test system for a fire extinguishing system, Measuring the release time of the extinguishing agent and communicating the release time of the extinguishing agent to each measurement module through communication; measuring a temperature change point in each measurement module and a concentration change point of the extinguishing agent; Determining a target concentration and determining whether the target concentration is achieved by determining whether the performance of the fire extinguishing system is appropriate at the target time or not; And to provide a test method.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a fire extinguishing agent discharge test method for a nuclear power plant, comprising the steps of: storing an extinguishing agent in a liquid state and a gaseous state; Wherein the at least one discharge nozzle (110) is connected to the extinguishing agent container (150) via a conduit (120), the method comprising the steps of: (a) A nozzle temperature sensor 300 is installed in the discharge nozzle 110 and a fire extinguishing agent concentration sensor 221, a temperature sensor 223 and a communication module (not shown) are installed inside the protection zone 100, (B) opening the container valve (130) to release the extinguishing agent into the interior of the guard area (100); (C) discharging the discharge nozzle to the nozzle temperature sensor (300) (D) transmitting the temperature change point Ng of the discharge nozzle to the plurality of measurement modules 200 through communication, and (e) The temperature change point of each measurement module 200 is measured through a temperature sensor 231 included in the measurement module 200 and the temperature change point Ng of the discharge nozzle 200 (F) calculating a concentration change time point (S) at which the concentration of the extinguishing agent is increased in each of the measurement modules (200); and (g) 200) using the concentration change time point (S) and the time difference (B) as a target time (Tt), which is a time for judging whether the concentration of each extinguishing agent achieves the target concentration (Ct) And (h) if the concentration of the extinguishing agent in each measurement module 200 in the target time Tt selected in the step (g) is equal to or higher than the target concentration Ct, And displaying the nonconformity.

In another embodiment, when the temperature change point Ng of the ejection nozzle is communicated to the plurality of measurement modules 200 through the communication in the step (d), the ejection nozzle The first measurement module 200a may communicate with the first measurement module 200a located on the upper side of the first measurement module 200a through communication. The first measurement module 200a may communicate with the remaining measurement module 200 through communication.

In step (f), the earliest time among the concentration change points S is determined as the equivalent concentration change point Se, and the time difference B in the measurement module 200 is compared with the equivalent time difference Be (T) = Se + 60 - Be + a, where a is the response time of the extinguishing agent concentration sensor 221 And the response delay time a of the extinguishing agent concentration sensor 221 provided in each measurement module 200 may be configured to have the same value.

Through the test method of the fire extinguishing agent emission of the nuclear power plant according to the present invention, the concentration of the fire extinguishing agent can be measured more rapidly and precisely in the fire extinguishing agent test.

Further, in the extinguishing agent discharge test method of the present invention, since the extinguishing agent reaches the discharge nozzle 110 through the temperature measurement of the discharge nozzle 110, the gaseous extinguishing agent reaches the discharge nozzle 110 It is possible to accurately measure the time point at which the measurement is performed.

In the extinguishing agent release test method of the present invention, temperature and concentration measurement are simultaneously performed by a plurality of installed measurement modules 200, and the temperature change and the concentration change time point are used for selecting the target time Tt. Tt) can be minimized, and the concentration of the extinguishing agent measured at the target time (Tt) can be more accurately measured, so that the performance of the extinguishing facility can be grasped more precisely and effectively.

Further, when the target time Tt is selected in the present invention, accurate response delay time-related information of the extinguishing agent concentration sensor 221 can be derived as a result using the actually measured temperature and the concentration change time point, The accuracy of the extinguishing agent release test can be improved by selecting an accurate target time Tt even when there is a difference in response delay time between extinguishing agent concentration sensors 221 in the module 200. [

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

Figure 1. Schematic diagram of conventional fire extinguishing system
Figure 2. Flow chart of the extinguishing agent release test of the present invention
Figure 3. Schematic diagram of the extinguishing agent release test of the present invention
4 is a partial schematic diagram of a measurement module 200 of the present invention.
5. Fig. 5 shows a first embodiment of the target time (Tt) selection of the present invention
6. The second embodiment of the target time (Tt) selection of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a flowchart of a fire extinguishing agent test method in a fire protection zone of a nuclear power plant of the present invention.

As shown in FIG. 2, the fire extinguishing agent test method of nuclear power plants of the present invention is largely divided into steps of preparing a fire extinguishing agent test apparatus, initiating fire extinguishing agent release, measuring the arrival time of fire extinguishing agent reaching the fire extinguishing agent through temperature measurement, In the module, the target time is selected through the temperature and concentration measurement, the concentration of the extinguishing agent of each measurement module is measured at the selected target time, and whether the extinguishing agent concentration of each measured module is reached or attained at the target concentration is determined . ≪ / RTI >

First, the preparation step of the extinguishing agent release test apparatus is a step of configuring the extinguishing agent release test according to the present invention.

FIG. 3 shows a schematic configuration for applying the extinguishing agent release test method of the present invention in a protected area of a nuclear power plant.

In the protection zone 100 of the nuclear power plant, a discharge nozzle 110 for discharging the extinguishing agent in a liquid state and a gaseous state into the protection zone 100 is formed when a fire occurs. One or more discharge nozzles 110 may be provided depending on the size of the protection zone 100.

The extinguishing agent container 150 is installed outside the protection zone 100 and stores extinguishing agents in a high-pressure liquid state and a gaseous state. A container valve 130 is formed in the extinguishing agent container 150 to control the supply of extinguishing agent and the discharging nozzle 110 and the extinguishing agent container 150 are connected to each other via a pipe 120 .

3 and 4, the preparation step of the extinguishing agent release test device for performing the extinguishing agent release test of the present invention in the protection zone 100 equipped with the extinguishing facility as described above comprises the steps of: (a) A nozzle temperature sensor 300 is installed in the discharge nozzle 110 and a fire extinguishing agent concentration sensor 221, a temperature sensor 223 and a communication module 290 are respectively installed in the inside of the protection zone And mounting the plurality of measurement modules 200 at different heights.

3, a data analysis apparatus 400 capable of communicating with the nozzle temperature sensor 300 or each measurement module 200 may be additionally provided outside the protection zone 100 as required, .

The nozzle temperature sensor 300 may be a wireless or wired sensor, and preferably includes a nozzle temperature communication module 300a for communication.

In addition, in the extinguishing agent test, since the extinguishing agent is released and gasified, the temperature may be lowered to about -80 ° C., so it is more preferable to install a sensor that can be used at a very low temperature.

The plurality of measurement modules 200 may be formed of first, second, and third measurement modules 200a, 200b, and 200c installed in the upper, middle, and lower portions of the protection zone 100, respectively, as shown in FIG.

The installation position of each measurement module 200 is sufficient to represent the concentration of the entire protection zone 100. For example, a position corresponding to 0.1, 0.4, 0.7 of the total height of the protection zone 100 Or 0.1, 0.5, or 0.9 of the total height, respectively.

As shown in FIG. 4, each measurement module 200 shown in the present invention may have a measurement unit 220 formed inside the housing 210 so that measurement can be stably performed at a low temperature. Preferably, the housing 210 has a cold resistance function using a heat insulating material so that the measuring unit 200 can operate normally even at a very low temperature.

The measuring unit 220 is provided with an extinguishing agent concentration sensor 221 for measuring the concentration of the extinguishing agent and a temperature sensor 223 for measuring the temperature of the measuring module 200, An oxygen concentration sensor 222 may be additionally provided.

It is preferable that the measuring module 200 is provided with a small suction pump 230 in order to suck the gas in the protection zone 100 including the discharged extinguishing agent, The gas containing the extinguishing agent gas sucked into the extinguishing agent concentration sensor 221 flows through the connection pipe (not shown) and the concentration is measured.

At this time, since the extinguishing agent concentration sensor 221 may be damaged by the extinguishing agent whose temperature is lowered, it is preferable that the exothermic concentration of the extinguishing agent is detected by the extinguishing agent concentration sensor 221, The micro heater 280 may be additionally provided.

However, since the temperature sensor 223 is used to determine the time N1 at which the fire extinguishing agent reaches the respective measurement modules 200, the temperature sensor 223 can be controlled by the micro heater 280 It is most preferable to directly measure the temperature of the gas in a state where it is not heated.

The measurement module 200 is provided with a communication module 290 inside or outside or inside and outside to communicate with the communication module 300 and the data analysis device 400 of the nozzle temperature sensor 300 .

Next, the second step of initiating the extinguishing agent release step of the present invention comprises (b) opening the container valve 130 to release the extinguishing agent into the interior of the guard area 100.

The operation of the container valve 130 and the supply pressure of the extinguishing agent may be controlled by a data analyzer 400 provided outside the guard area 100.

Through the opening of the container valve 130, a high pressure liquid and gaseous extinguishing agent can be discharged through the pipe 120 and into the interior of the guard area 100 through the discharge nozzle 110.

Next, in the third step of measuring temperature of the extinguishing agent by the temperature measurement, the step of measuring the time of arrival of the extinguishing agent reaches the discharge nozzle 110. In order to more precisely measure the point of time when the extinguishing agent reaches the discharge nozzle 110, (C) measuring a temperature change point (Ng) of the discharge nozzle with the nozzle temperature sensor (300); And (d) transmitting the temperature change point Ng of the discharge nozzle to the plurality of measurement modules 200 through communication.

In the present invention, (c) the step of measuring the temperature change point Ng of the discharge nozzle with the nozzle temperature sensor 300 is configured.

As described above, when the container valve 130 is opened, the extinguishing agent is delivered to the discharge nozzle 110 through the pipe 120. At this time, the discharge nozzle 110 is affected by the length of the pipe 120, It takes time for fire extinguishing agents to reach, and the delay time that is primarily affected by these installations can vary depending on the protected area.

Thus, although the opening time of the container valve 130 operating through the control can be accurately measured, the extinguishing agent reaches the discharge nozzle 110 and releases the extinguishing agent into the guard area 100, Different delay times occur depending on the characteristics, and it is not easy to grasp accurately.

When the container valve 130 is opened, a liquid state extinguishing agent is supplied. However, since the liquid extinguishing agent is evaporated in the pipe 120, a gaseous extinguishing agent whose volume is abruptly increased is generated, The extinguishing agent in the gaseous state reaches the discharge nozzle 110 before the extinguishing agent in the liquid state is discharged before the extinguishing agent in the gaseous state is discharged before the extinguishing agent in the gaseous state reaches the discharge nozzle 110. Therefore, It is not easy to do.

Accordingly, when the extinguishing agent is stored in the extinguishing agent container 150 in a liquid state at a saturated pressure, when the container valve 130 is opened, the extinguishing agent stored in the high pressure liquid is evaporated, It has been noted that the extinguishing agent gas reaches the discharge nozzle 110 and is discharged into the protection zone 100, and the temperature is drastically lowered through the joule-Thomson effect.

The temperature sensor can immediately measure a change in temperature. Since the rapid temperature change occurs due to the arrival of the extreme low temperature extinguishing agent as in the present invention, the rapid temperature change can be precisely measured without a response delay time.

When the extinguishing agent reaches the discharge nozzle 110, the extinguishing agent is released into the protection zone 100. When the temperature of the discharge nozzle 110 is rapidly lowered, the extinguishing agent reaches the discharge nozzle 110 It can be judged as a time point.

That is, in the present invention, the time when the reference extinguishing agent reaches the discharge nozzle 110 and is discharged to the inside of the protection zone 100 is measured by the nozzle temperature sensor 300, (Ng) of the discharge nozzle 110, which is a suddenly changing point of time, and measures it.

One discharge nozzle 110 may be installed in the protection zone 100, but a plurality of discharge nozzles 110 may be formed as shown in FIG.

In a case where a plurality of discharge nozzles 110 are formed, a time point at which the fire extinguishing agent reaches the respective discharge nozzles 110 may differ, and a time point at which the fire extinguishing agent is discharged into the inside of the guard area 100 is a reference , It is possible to determine the temperature change point Ng of the discharge nozzle 110 based on the discharge nozzle 110 that discharges the fire extinguishing agent the earliest.

At this time, as described above, since the extinguishing agent initially arriving at the discharge nozzle 110 is a gaseous extinguishing agent, the temperature change point Ng of the discharge nozzle is the time at which the gaseous extinguishing agent reaches.

In the discharge nozzle 110, the extinguishing agent in the gaseous state is firstly discharged, and then the extinguishing agent in the liquid state is also discharged into the interior of the protection zone 100 through the discharge nozzle 110. The extinguishing agent in the liquid state is discharged into the protection zone 100) to become a gaseous extinguishing agent.

When the extinguishing agent in the liquid state reaches the discharge nozzle 110, the temperature of the discharge nozzle 110 changes more rapidly than when the extinguishing agent in the gaseous state is discharged.

The time Nf at which the liquid fire extinguishing agent reaches the discharge nozzle 110 is determined by observing the temperature change of the nozzle temperature sensor 300 while rapidly changing the temperature of the discharge nozzle at the temperature change point Ng It is possible to measure and select the point of occurrence.

Since the temperature change point Ng of the discharge nozzle 110 is a reference time, the data is transmitted to each measurement module 200 through the nozzle temperature communication module 300a provided in the nozzle temperature sensor 300 It is possible to do. Of course, they may be transmitted to the data analysis apparatus 400 together.

To this end, the present invention comprises the step (d) of transmitting the temperature change point Ng of the discharge nozzle to the plurality of measurement modules 200 through communication

The data transfer of the temperature change point Ng of the discharge nozzle is transmitted to the first measurement module 200a formed at the upper part through the communication module 300a provided in the nozzle temperature sensor 300 as shown in FIG. 3 To the second and third measurement modules 200b and 200c formed in the middle and the bottom through the communication module 290a provided in the first measurement module 200a.

Alternatively, it is also possible to transmit the data of the temperature change point Ng of the discharge nozzle directly from the communication module 300a provided in the nozzle temperature sensor 300 to each measurement module 200. [

Meanwhile, the temperature change point Ng of the discharge nozzle is a time point when the fire extinguishing agent reaches the discharge nozzle 100 as described above, and the fire extinguishing agent is discharged into the fire extinguishing space 100.

The container valve 130 is shut off after one minute (60 seconds) from the start of the discharge of the extinguishing agent into the inside of the protection zone 100 among the various extinguishing agent release test conditions to thereby stop the extinguishing agent supply from the extinguishing agent container 150 May be included in the test conditions.

Of course, even when the container valve 130 is closed, the extinguishing agent is discharged between the pipe 120 and the discharge nozzle 110, so that the extinguishing agent is discharged into the inside of the protecting zone 100 for a certain period of time. However, It will not be released after a certain period of time.

As described above, it is obvious that it is more important to accurately measure the starting point of release of the extinguishing agent in the test condition in which the container valve 130 is shut off after 1 minute (60 seconds) from the start of the extinguishing agent discharge.

In the fourth step of the present invention, there is a step of selecting a target time (Tt) through temperature and concentration measurement. More specifically, (e) a temperature sensor (B) between the temperature change point of time of each measurement module (200) and the temperature change point (Ng) of the discharge nozzle is calculated by measuring the temperature change point of each measurement module (200) (F) measuring a concentration change time point (S) at which the concentration of the extinguishing agent increases in each of the measurement modules (200); and (g) (Tt), which is a time for determining whether or not the concentration of the target concentration (Ct) has reached the target concentration (Ct), using the concentration change point (S) and the time difference (B).

(E) measuring a temperature change time point of each measurement module 200 through a temperature sensor 231 included in each measurement module 200, and comparing the temperature change point of each measurement module 200 and the temperature change point of the measurement module 200, (B) between the temperature change point (Ng) and the temperature change point (Ng).

In this step, the measurement module 200 sucks the gas and measures the concentration and temperature of the extinguishing agent using the extinguishing agent concentration sensor 221 and the temperature sensor.

Once the vaporized extinguishing agent has reached each measurement module 200, the inhaled gas will contain the extinguishing agent gas and will be affected by the extinguishing agent, and if the extinguishing agent has not reached each measurement module 200 , The sucked gas will not be affected by the extinguishing agent discharged through the discharge nozzle 110.

 3, since each measurement module 200 is a certain distance from the discharge nozzle 110, the time at which the extinguishing agent discharged from the discharge nozzle 110 reaches each measurement module 200 is different from the difference . The difference in the arrival times may differ depending on the size of the protection zone 100 or the installation position of each measurement module 200.

Before the extinguishing agent reaches each measurement module 200, the concentration of the extinguishing agent does not change in the state of almost zero, and the change in the temperature is not large.

When the extinguishing agent reaches each measuring module 200, the extinguishing agent discharged from the discharging nozzle 110 has a remarkably low temperature, so that the temperature measured by the temperature sensor 223 of each measuring module 200 is abrupt A time when a change occurs and a temperature is rapidly changed can be regarded as a time point when the fire extinguishing agent reaches each measurement module 200.

The temperature change points N1, N2 and N3 of the respective measurement modules at the time when the extinguishing agent reaches the first, second and third measurement modules 200a, 200b and 200c can be measured, The time difference from the change point Ng can be expressed as B1, B2, and B3 as shown in FIG.

These time differences B1, B2, and B3 are time differences that occur when the discharge nozzle 110 and each measurement module 200 are separated from each other.

(F) measuring a concentration change point S, which is a point at which the concentration of the extinguishing agent increases in each of the measurement modules 200.

The concentration of the extinguishing agent should be changed in the extinguishing agent concentration sensor 221 of each measuring module 200 from the time when the extinguishing agent reaches each measuring module 200. However, as shown in FIG. 5, the concentration change points S1, S2, and S3 in the first, second, and third measurement modules 200a, 200b, and 200c are different from the temperature change points in the respective measurement modules 200 . This difference is caused by the presence of the response delay time (a) in each extinguishing agent concentration sensor 221.

FIG. 5 shows a graph when the concentration change time points S1, S2, and S3 are different from each other in the measurement module 200, but the response delay time a is the same.

This shows that the extinguishing agent concentration sensor 221 having the same response delay time (a) is used in each measurement module 200 and the difference of the concentration change time points S1, S2, And the distance between the discharge nozzle 110 and the discharge nozzle 110.

In this case, the concentration change time S in one measurement module 200 can be determined as the equivalent concentration change time Se. For example, the first, second, and third concentration changes S1 at which the concentration change occurs at the earliest time point among the viewpoints S1, S2, and S3 may be determined as the equivalent concentration change point (Se).

At this time, B1, B2 and B3, which represent the time difference between the temperature change point of the measurement module and the temperature change point Ng of the discharge nozzle, can also be expressed by the equivalent time difference Be. The time difference in the module 200 can be selected as the equivalent time difference Be. That is, in FIG. 5, since the equivalent concentration change point Se is selected as the concentration change point S1 of the first measurement module 200a, the equivalent time difference Be is also selected as B1.

(H) In order to confirm whether the concentration of the extinguishing agent in the protection zone 100 has reached the design concentration or the target concentration at the target time Tt, And measuring the concentration of the extinguishing agent using the extinguishing agent concentration sensor 221 provided in the extinguishing agent concentration sensor 221.

Here, as the first embodiment of the target time Tt, the determination can be made using the following relation defined by the Korean Hydro Nuclear Power based on the concentration change point S of the extinguishing agent concentration sensor.

------------------- (1)

------------------- (One)

Here, Tt is a target time for measuring whether the extinguishing agent has reached the design concentration or the target concentration in the protection zone, S1 is the first concentration change time point measured by the first measurement module 200a, The time difference between the first temperature change time point and the discharge nozzle temperature change point Ng measured by the temperature sensor 200a and a represents a response delay time existing in the extinguishing agent concentration sensor 221 of each measurement module 200. [ a is a characteristic of the extinguishing agent concentration sensor 221 and may be used as a constant when the response delay time suggested by the manufacturer is accurate or is obtained from one experiment through another experiment.

That is, the target time Tt shown in the equation (1) can be obtained by the extinguishing agent concentration sensors 221a, 221b and 221c having the same response delay time (a) in the first, second and third measurement modules 200a, 200b and 200c The target time Tt measured in the first, second, and third measurement modules 200a, 200b, and 200c is the same as shown in FIG. 5, B1 can be determined by measuring the value.

However, the equation (1) is suitable when all of the extinguishing agent concentration sensors 221 used in the emission test have the same response delay time (a), and the response delay time of each extinguishing agent concentration sensor 221 is the same Or if the actual response delay time differs from the suggested value, the accuracy may be degraded.

The response delay characteristic of the actual extinguishing agent concentration sensor 221 is usually set to an upper limit such as 5 seconds or less or 10 seconds or less so that the accurate response delay characteristic of each extinguishing agent concentration sensor 221 may not be the same.

In order to reflect such a characteristic, in the second embodiment, the target time Tt1, Tt2, Tt3 is set in each measurement module 200 based on the concentration change point S of the extinguishing agent concentration sensor 221, Can be selected using the following relational expression.

------------------- (2)

------------------- (2)

The response delay times S1, S2 and S3 of the respective concentration sensors shown in FIG. 6 can be represented by S1 = Ng + B1 + a1, S2 = Ng + B2 + a2, S3 = Ng + B3 + a3, Substituting into equation (2), it is expressed by the following equation (2-a).

------------------- (2-a)

- (2-a)

Here, a1, a2 and a3 represent angular response times in the extinguishing agent concentration sensors 221a, 221b and 221c of the first, second and third measuring modules 200a, 200b and 200c.

That is, when a1, a2, and a3 are not the same in each concentration sensor 221, the target concentration Ct is calculated from the time-concentration graph measured by the extinguishing agent concentration sensor 221 provided in each measurement module 200, The target times Tt1, Tt2, and Tt3 for determining whether or not they have arrived can represent different times on the horizontal time axis as shown in FIG.

However, Tt1, Tt2, and Tt3 shown in the above equation (2-a) all indicate the concentration in the gas sucked at the same time after 60 seconds from the temperature change point Ng of the discharge nozzle.

 That is, the concentration values shown in Tt1, Tt2, and Tt3 in the graph of the extinguishing agent concentration versus time indicate the extinguishing gas concentration of the gas sucked in the extinguishing agent concentration sensors 221a, 221b, and 221c at the same time as Ng + 60 seconds will be.

On the other hand, when a1, a2, and a3 in Equation (2-a) all indicate the same response delay time, the target times Tt1, Tt2, and Tt3 in equations (2) and .

Even if the manufacturer has provided response delay times a1, a2, and a3 for the extinguishing agent concentration sensors 221a, 221b, and 221c, actual errors may exist.

In the case of using the equation (2), it is possible to calculate the concentration of the extinguishing agent concentration sensor actually measured even if the response delay time (a) of the concentration sensor 221 is unknown, without considering the error with respect to a1, a2, The response delay time a of the actual concentration sensor 221 is derived using the time difference B between the change point S and the temperature change point N of the temperature sensor and the release nozzle temperature change point Ng, A more accurate target time Tt can be derived.

Finally, in the fifth step of the present invention, the extinguishing agent concentration of each measurement module is measured at a predetermined target time, and it is determined whether or not the extinguishing agent concentration of each measured measurement module reaches or has reached the target concentration (Ct) The step of displaying the suitability if the concentration of the extinguishing agent in each measuring module 200 in the selected target time Tt is equal to or more than the target concentration Ct and if not, displaying the nonconformity; .

Through such a method, the fire extinguishing gas emission test of a nuclear power plant can be performed more effectively and precisely.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: Protective zone 110: Discharge nozzle 120: Piping
130: container valve 150: fire extinguishing container
200: measurement module 200a: first measurement module 200b: second measurement module
200c: third measuring module 210: housing 220: measuring part
221: extinguishing agent concentration sensor 222: oxygen (O2) measuring sensor
223: Temperature sensor 230: Suction pump 240: Moisture filter
280: Microheater 290: Communication module 300: Nozzle temperature sensor
400: data analysis device
a: response delay time of the extinguishing agent concentration sensor
a1, a2, a3: response delay time of extinguishing agent concentration sensor in measurement modules 1, 2, 3
B: Time difference between the temperature change point of the discharge nozzle and the temperature change point of the measurement module
B1, B2, B3: time difference between the temperature change point of the discharge nozzle and the first to third temperature change points
Ct: target concentration
Ng: the temperature change point of the discharge nozzle
Nf: When the liquid fire extinguishing agent reaches the discharge nozzle
N1, N2, N3: The first to third temperature changes of the temperatures measured in the measurement modules 1 to 3
S: Time of change of concentration of fire extinguishing agent measured by measuring module
S1, S2, S3: The first to third concentration change points of the extinguishing agent measured by the measurement modules 1 to 3
Be: Equivalent time difference Se: Equivalent concentration change time point
Tt: Target Time

Claims (3)

A fire extinguishing agent container 150 storing a fire extinguishing agent in a liquid state and a gaseous state and having a container valve 130 is installed on the outside and a fire extinguishing agent container 150 connected to the fire extinguishing agent container 150 through a pipe 120 A fire extinguishing agent emission test method for a nuclear power plant that discharges the fire extinguishing agent and measures the concentration of the fire extinguishing agent in a fire protection zone (100) of the nuclear reactor in which the discharge nozzle (110)
(a) a nozzle temperature sensor (300) is installed in the discharge nozzle (110) in the protection zone (100), and a fire extinguishing agent concentration sensor (221), a temperature sensor Installing a plurality of measurement modules (200) each including a communication module (290) at different heights;
(b) opening the container valve (130) to release the extinguishing agent into the interior of the guard area (100);
(c) measuring a temperature change point (Ng) of the discharge nozzle with the nozzle temperature sensor (300);
(d) transmitting the temperature change point (Ng) of the discharge nozzle to the plurality of measurement modules (200) through communication;
(e) a temperature change point of each measurement module 200 is measured through a temperature sensor 231 included in each measurement module 200, and a temperature change point of each measurement module 200 is compared with a temperature change point of each measurement module 200, Calculating a time difference (B) with a temperature change point (Ng);
(f) measuring a concentration change time point (S) at which the concentration of the extinguishing agent increases in each of the measurement modules (200);
(g) a target time (Tt), which is a time for determining whether the concentration of each extinguishing agent has reached the target concentration (Ct) in each of the measurement modules (200) ;
(h) If the concentration of the extinguishing agent in each measurement module 200 in the target time Tt selected in the step (g) is equal to or more than the target concentration Ct, the fitness is displayed. Otherwise, The method comprising:
In step (f), the earliest time among the respective concentration change points S is determined as the equivalent concentration change point Se, and the time difference B in the measurement module 200 is determined as the equivalent time difference Be Further comprising the steps of:
In step (g), the target time (Tt) = Se + 60 - Be + a, where a is the response delay time of the extinguishing agent concentration sensor 221, Wherein the response delay time (a) of the extinguishing agent concentration sensor (221) has the same value.
The method according to claim 1,
In the step (d), when the temperature change point Ng of the discharge nozzle is communicated to the plurality of measurement modules 200 through communication, the nozzle temperature sensor 300 detects the temperature of the discharge nozzle 110 closest to the discharge nozzle 110 The first measuring module 200a communicates with the first measuring module 200a through the communication and the first measuring module 200a communicates with the remaining measuring module 200 through communication. Way. delete

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