CN112466491B - Online measuring system and method for content of dissolved hydrogen in primary circuit coolant of pressurized water reactor - Google Patents
Online measuring system and method for content of dissolved hydrogen in primary circuit coolant of pressurized water reactor Download PDFInfo
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- CN112466491B CN112466491B CN202011293337.8A CN202011293337A CN112466491B CN 112466491 B CN112466491 B CN 112466491B CN 202011293337 A CN202011293337 A CN 202011293337A CN 112466491 B CN112466491 B CN 112466491B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/022—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/032—Reactor-coolant flow measuring or monitoring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses an online measuring system and method for the content of dissolved hydrogen in a primary loop coolant of a pressurized water reactor, wherein the measuring system comprises an online hydrogen meter continuous flow, an online hydrogen meter positioned at the downstream of the online hydrogen meter continuous flow and a backpressure valve positioned at the downstream of the online hydrogen meter, the downstream outlet of the backpressure valve is communicated to a continuous flow drain, a communicating pipeline between the online hydrogen meter continuous flow and the online hydrogen meter is provided with a pressure gauge, the pressure gauge can be used for detecting the pressure of material flow in a communicating pipeline, a pipeline communicated between the backpressure valve and the continuous flow drain is provided with a flowmeter, and the flowmeter can be used for detecting the flow of the material flow in the communicating pipeline. When the concentration of the dissolved hydrogen in the primary circuit of the pressurized water reactor nuclear power plant is more than 18.2cc/Kg, the content of the dissolved hydrogen in the primary circuit of the pressurized water reactor nuclear power plant can be accurately measured by increasing the pressure of the system.
Description
Technical Field
The invention relates to the technical field of pressurized water reactors of nuclear power stations, in particular to an online measuring system and method for the content of dissolved hydrogen in a primary circuit coolant of a pressurized water reactor.
Background
There are about several hundred nuclear power plants operating worldwide, the vast majority (about 92%) of which are Light Water Reactors (LWR), the balance being heavy water reactors (PHWR) and advanced gas cooled reactors (AGR). The light water reactor is mainly of two types, namely a Pressurized Water Reactor (PWR) and a Boiling Water Reactor (BWR), wherein about 75% of the light water reactors are pressurized water reactors, and most of nuclear power stations which are put into operation and are to be built in China are of the pressurized water reactor type, and the pressurized water reactor nuclear power stations use light water as a coolant and a moderator. The system mainly comprises a nuclear steam supply system (namely a primary loop system), a steam turbine generator system (namely a secondary loop system) and other auxiliary systems. After the heat energy released by fission of the nuclear fuel is absorbed by the reactor core, the coolant transfers the heat energy to the two loops through the steam generator to generate steam, and then the steam enters the steam turbine to do work to drive the generator to generate electricity. During the operation of the reactor, a cooling circulation purification system is required to continuously remove fission and corrosion products in circulating water, so that the activity of a loop system is reduced. Wherein, pressurized water reactor primary circuit coolant can decompose under the strong radiation condition, and the reaction formula: 2H 2 O⇌H 2 +H 2 O 2 ，H 2 O 2 ⟶H 2 O+O 2 . O produced by decomposition 2 And H 2 O 2 Is one of the main causes of corrosion of the primary loop structural material and equipment. To suppress the radiation decomposition of the primary coolant, hydrogen is usually added to the coolant to increase the recombination rate of water and reduce the radiolysis product O 2 And H 2 O 2 Thereby suppressing the decomposition of water by irradiation. However, when the hydrogen content in water is too high, the machine is easy to be crisp, the structure of the device is likely to crack, the device is damaged, the equipment cannot operate, and even leakage occurs. Therefore, it is necessary to prevent not only corrosion of the structural material caused when the hydrogen content is too low, but also damage of the mechanical structure caused when the hydrogen content is too high.
The method for measuring the dissolved hydrogen content of the primary circuit of the pressurized water reactor nuclear power plant mainly comprises online measurement and offline measurement, wherein the online measurement is mainly carried out by externally connecting a pipeline on a primary circuit system of the pressurized water reactor nuclear power plant, and the offline measurement is convenient for mobile measurement in a laboratory. Although the off-line measurement can be performed anytime and anywhere, the off-line measurement can only be intermittently detected, and the on-line measurement can be used for continuously measuring the hydrogen content in real time, so that a system and a method for on-line measurement are needed for real-time monitoring of the hydrogen content.
The on-line measurement method adopts an on-line hydrogen meter to directly measure. However, the saturated volume of hydrogen absorbed by water at 20 ℃ under the standard atmospheric pressure is 18.2cc/kg, and when the concentration of dissolved hydrogen in the coolant exceeds 18.2cc/kg, the saturated volume of hydrogen absorbed by water is exceeded, so that the concentration of dissolved hydrogen in the primary circuit cannot be accurately measured by an online hydrogen meter. Therefore, a measurement method is needed to solve the problem that the online hydrogen meter cannot accurately measure the dissolved hydrogen concentration of the primary circuit of the pressurized water reactor nuclear power plant when the dissolved hydrogen concentration is more than 18.2 cc/Kg.
Disclosure of Invention
The invention aims to provide an on-line measuring system and method for the content of dissolved hydrogen in a primary circuit coolant of a pressurized water reactor, when the concentration of the dissolved hydrogen in the primary circuit of a pressurized water reactor nuclear power plant is more than 18.2cc/Kg, the saturated dissolved hydrogen content of water can be increased by increasing the pressure of the system, so that the continuous and accurate on-line measurement of the content of the dissolved hydrogen in the primary circuit of the pressurized water reactor nuclear power plant is realized.
In order to achieve the above object, in one aspect, the present invention provides an online measuring system for dissolved hydrogen content in a primary loop coolant of a pressurized water reactor, comprising an online hydrogen meter continuous flow, and characterized by further comprising an online hydrogen meter located downstream of the online hydrogen meter continuous flow, a back pressure valve located downstream of the online hydrogen meter, and a downstream outlet of the back pressure valve is communicated to the continuous flow for drainage.
Furthermore, the continuous flow of the online hydrogen meter, the back pressure valve and the continuous flow drain are sequentially communicated through stainless steel pipelines.
Furthermore, a pressure gauge is arranged on a communicating pipeline between the continuous flow of the online hydrogen meter and the online hydrogen meter, and the pressure gauge can be used for detecting the pressure of the logistics in the communicating pipeline.
Furthermore, a flowmeter is arranged on a pipeline communicated between the back pressure valve and the continuous flow drain, and the flowmeter can be used for detecting the flow of material flow in the communicated pipeline.
Further, the measuring range of the pressure gauge is 0-2.5 MPa.
Further, the flowmeter is a turbine flowmeter.
Further, the online hydrogen meter is a hashed hydrogen meter with the dissolved hydrogen electrode of 31250.
Further, the back pressure valve is a metering valve.
On the other hand, the invention provides an online measuring method for the content of dissolved hydrogen in a primary circuit coolant of a pressurized water reactor, which is characterized by comprising the following steps:
s1, connecting all devices, and opening an online hydrogen meter continuous flow valve;
s2, reading the pressure displayed by the pressure gauge, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve to enable the pressure reading of the pressure gauge to be between 0.2 and 0.3 Mpa;
s3, reading the flow displayed by the flowmeter, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow of the online hydrogen meter to enable the flow reading of the flowmeter to be 200 +/-20 ml/min;
s4, after the reading of the online hydrogen meter is stable, reading the displayed reading and recording the measurement result;
and S5, closing the continuous outflow port valve of the online hydrogen meter, and disconnecting the connecting pipeline of each device to finish measurement.
Since the saturation volume of hydrogen absorbed by water at 20 ℃ is 18.2cc/kg at standard atmospheric pressure, the concentration of dissolved hydrogen in the coolant exceeds 18.2cc/kg, which exceeds the saturation volume of hydrogen absorbed by water, resulting in the failure of the on-line hydrogen meter to accurately measure the concentration of dissolved hydrogen in the primary circuit.
The invention has the beneficial effects that:
1. according to the online measuring system for the content of dissolved hydrogen in the primary loop coolant of the pressurized water reactor, the continuous flow of the online hydrogen meter, the back pressure valve and the continuous flow drain are sequentially communicated through the stainless steel pipeline, so that corrosion and rusting caused by long-term use of the pipeline can be effectively prevented, the phenomena that the primary loop coolant of the pressurized water reactor is corroded before flowing to the online hydrogen meter and the like are avoided, the measuring accuracy of the online hydrogen meter is ensured, and meanwhile, the service life of the device can be prolonged.
2. The online measuring system for the content of the dissolved hydrogen in the primary loop coolant of the pressurized water reactor can continuously measure on line, accurately measure the content of the dissolved hydrogen in the primary loop coolant of the pressurized water reactor, and do not need to carry out offline intermittent measurement.
3. The invention provides an online measuring method for the content of dissolved hydrogen in a pressurized water reactor primary circuit coolant, which is characterized in that the pressure in a pipeline is controlled between 0.2 MPa and 0.3 MPa, so that the saturation volume of water for absorbing hydrogen is larger than 18.2cc/kg, the problem that the concentration of the dissolved hydrogen in the coolant exceeds 18.2cc/kgH2O, redundant hydrogen is dissociated in a system because of unabsorption, and the concentration of the dissolved hydrogen in the primary circuit cannot be accurately measured by an online hydrogen meter is effectively avoided, meanwhile, the pressure in the pipeline cannot be too large, when the pressure is too large, the flow of the pressurized water reactor primary circuit coolant is reduced, the measuring precision of the pressure meter is also reduced, and the measuring error is larger.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
FIG. 1 is a schematic diagram of a connection structure of an on-line measuring system for the content of dissolved hydrogen in a primary coolant of a pressurized water reactor according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an on-line measuring method for the content of dissolved hydrogen in a primary coolant of a pressurized water reactor according to an embodiment of the present invention;
FIG. 3 is a graph of saturated dissolved hydrogen versus pressure for an example of the present invention.
In the figure: 1. an online hydrogen meter continuous flow; 2. a pressure gauge; 3. an online hydrogen meter; 4. a back pressure valve; 5. a flow meter; 6. Continuous flow is hydrophobic.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort. The designation of the design orientation merely indicates the relative positional relationship between the respective members, not the absolute positional relationship.
In the examples of the present invention, the relationship between saturated dissolved hydrogen and pressure is shown in FIG. 3. As can be seen from the attached FIG. 3, the saturated dissolved hydrogen content increases with the increase of the pressure, so that the invention can fully dissolve the hydrogen in the system into the water by increasing the pressure, and improve the accuracy of the on-line hydrogen meter measurement. Referring to fig. 1, in an embodiment of the present invention, an online measurement system for a dissolved hydrogen content in a primary coolant of a pressurized water reactor includes an online hydrogen meter continuous flow 1, and is characterized by further including an online hydrogen meter 3 located downstream of the online hydrogen meter continuous flow 1, and a back pressure valve 4 located downstream of the online hydrogen meter 3, and a downstream outlet of the back pressure valve 4 is communicated to a continuous flow drain 6. The on-line hydrogen meter continuous flow 1 is used for providing a system with a material flow in a pressurized water reactor loop containing a coolant, the material flow can flow to the back pressure valve 4 through the on-line hydrogen meter 3 and finally flows back to the continuous flow hydrophobic valve 6, and the material flow returns to the pressurized water reactor loop system to form a complete loop. The device can continuously perform online measurement, accurately measure the content of the hydrogen dissolved in the coolant in the pressurized water reactor loop system, and do not need offline intermittent measurement.
Further, in the embodiment of the invention, the continuous flow 1 of the online hydrogen meter, the online hydrogen meter 3, the backpressure valve 4 and the continuous flow drain 6 are sequentially communicated through stainless steel pipelines. The stainless steel pipe can provide a clean and non-corrosive circulation environment for continuous material flow.
Further, in the embodiment of the present invention, a pressure gauge 2 is disposed on a communication pipeline between the continuous flow 1 of the online hydrogen meter and the online hydrogen meter 3, wherein a measurement range of the pressure gauge 2 is 0-2.5 Mpa. Specifically, the pressure gauge 2 can be used for detecting the pressure of the logistics in the communication pipeline in real time. The pressure in the pipe is determined by observing the reading of the pressure gauge 2 while adjusting the back pressure valve 4.
Furthermore, a flowmeter 5 is arranged on a pipeline communicated between the back pressure valve 4 and the continuous flow drain, and the flowmeter 5 can be used for detecting the flow of material flow in the communicated pipeline. Further, the flow meter 5 is a turbine flow meter. Turbine flowmeters are one of the most commonly used flowmeters in industry and laboratories. The pressure relief valve has the characteristics of simple and visual structure, small pressure loss, convenience in maintenance and the like. The turbine flowmeter is suitable for measuring small flow through a pipeline with the diameter D <150mm, and can also measure the flow of corrosive media. The turbine flowmeter is used in the invention, the precision is high, the cost is low, and the use is convenient.
Further, the online hydrogen table 3 is a hashed hydrogen table with the dissolved hydrogen electrode of 31250.
Further, the back pressure valve 4 is a metering valve.
Referring to fig. 2, the specific measurement method of the measurement system is characterized by comprising the following steps:
s1, connecting all devices, and opening an online hydrogen meter continuous flow 1 valve;
s2, reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is between 0.2 and 0.3 Mpa;
s3, reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the online hydrogen meter, so that the flow reading of the flowmeter 5 is 200 +/-20 ml/min;
s4, after the reading of the online hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and S5, closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting a connecting pipeline of each device to finish measurement.
The specific embodiment of the invention is as follows:
example 1
Connecting all devices, and opening an online hydrogen meter continuous flow 1;
reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is 0.20 Mpa;
reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the online hydrogen meter so that the flow reading of the flowmeter 5 is 220ml/min;
after the reading of the on-line hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and (4) closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting the connecting pipelines of all the devices to finish measurement.
Example 2
Connecting all devices, and opening an online hydrogen meter continuous flow 1;
reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is 0.22 Mpa;
reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the online hydrogen meter, so that the flow reading of the flowmeter 5 is 210ml/min;
after the reading of the on-line hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and (4) closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting the connecting pipelines of all the devices to finish measurement.
Example 3
Connecting all devices, and opening an online hydrogen meter continuous flow 1;
reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is 0.24 Mpa;
reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the online hydrogen meter so that the flow reading of the flowmeter 5 is 200ml/min;
after the reading of the on-line hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and (4) closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting the connecting pipelines of all the devices to finish measurement.
Example 4
Connecting all devices, and opening an online hydrogen meter continuous flow 1;
reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is 0.26 Mpa;
reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the on-line hydrogen meter, so that the flow reading of the flowmeter 5 is 190ml/min;
after the reading of the on-line hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and (4) closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting the connecting pipelines of all the devices to finish measurement.
Example 5
Connecting all devices, and opening an online hydrogen meter continuous flow 1;
reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is 0.28 Mpa;
reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the online hydrogen meter, so that the flow reading of the flowmeter 5 is 180ml/min;
after the reading of the on-line hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and (4) closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting the connecting pipelines of all the devices to finish measurement.
Example 6
Connecting all devices, and opening an online hydrogen meter continuous flow 1;
reading the pressure displayed by the pressure gauge 2, and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve 4 to ensure that the pressure reading of the pressure gauge 2 is 0.30 Mpa;
reading the flow displayed by the flowmeter 5, and adjusting the flow in the pipeline by adjusting the opening of the continuous flow 1 of the online hydrogen meter so that the flow reading of the flowmeter 5 is 170ml/min;
after the reading of the on-line hydrogen meter 3 is stable, reading the displayed reading and recording the measurement result;
and (4) closing an outlet valve of the continuous flow 1 of the online hydrogen meter, and disconnecting the connecting pipelines of all the devices to finish measurement.
The data read from the on-line hydrogen table 1 of examples 1-6 are collated as shown in the following table:
| examples | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Flow rate ml/min | 220 | 210 | 200 | 190 | 180 | 170 |
| Pressure Mpa | 0.20 | 0.22 | 0.24 | 0.26 | 0.28 | 0.30 |
| Dissolved hydrogen content cc/kg | 35 | 36 | 36 | 37 | 36 | 35 |
As can be seen from the above data, the dissolved hydrogen content measured at pressures between 0.2 and 0.3 MPa is relatively stable at 35-39 cc/kg. The feasibility of the method for determining the content of dissolved hydrogen in the primary coolant of a pressurized water reactor is illustrated.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a component of 8230means that the element does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the specific embodiments of the invention be limited to these descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. An on-line measuring system for the content of dissolved hydrogen in a primary circuit coolant of a pressurized water reactor comprises an on-line hydrogen meter continuous flow (1), and is characterized by further comprising an on-line hydrogen meter (3) positioned at the downstream of the on-line hydrogen meter continuous flow (1), a back pressure valve (4) positioned at the downstream of the on-line hydrogen meter (3), and a downstream outlet of the back pressure valve (4) is communicated to a continuous flow drain pipe (6);
the back pressure valve (4) is a metering valve;
the on-line hydrogen meter continuous flow (1), the on-line hydrogen meter (3), the back pressure valve (4) and the continuous flow drain (6) are communicated in sequence through stainless steel pipelines;
the on-line hydrogen meter continuous flow (1) is used for providing a system with material flow in a pressurized water reactor loop containing a coolant, the material flow can flow to the back pressure valve (4) through the on-line hydrogen meter (3) and finally flows back to the continuous flow hydrophobic valve (6) and returns to the pressurized water reactor loop system to form a complete loop, so that an on-line measurement system can continuously measure on line, and the content of the dissolved hydrogen in the coolant in the pressurized water reactor loop system can be accurately measured;
a communicating pipeline between the continuous flow (1) of the online hydrogen meter and the online hydrogen meter (3) is provided with a pressure gauge (2), and the pressure gauge (2) can be used for detecting the pressure of material flow in the communicating pipeline;
a flowmeter (5) is arranged on a pipeline communicated between the back pressure valve (4) and the continuous flow drain, and the flowmeter (5) can be used for detecting the flow of material flow in the communicated pipeline;
the flow in the pipeline is adjusted by adjusting the opening of the continuous flow (1) of the online hydrogen meter.
2. The system for the on-line determination of the content of dissolved hydrogen in the primary coolant of a pressurized water reactor according to claim 1, characterized in that the pressure gauge (2) measures in the range of 0-2.5 Mpa.
3. The system for the on-line determination of the content of dissolved hydrogen in the primary coolant of a pressurized water reactor according to claim 1, characterized in that the flow meter (5) is a turbine flow meter.
4. The system for the on-line determination of the content of dissolved hydrogen in a primary coolant of a pressurized water reactor according to claim 1, characterized in that the on-line hydrogen meter (3) is a hashed hydrogen meter with a dissolved hydrogen electrode of 31250.
5. An assay method for an assay system according to any one of claims 1 to 4, comprising in particular the steps of:
s1, connecting all devices, and opening an online hydrogen meter continuous flow (1) valve;
s2, reading the pressure displayed by the pressure gauge (2), and adjusting the pressure in the pipeline by adjusting the opening of the backpressure valve (4) to ensure that the pressure reading of the pressure gauge (2) is between 0.2 and 0.3 Mpa;
s3, reading the flow displayed by the flowmeter (5), and adjusting the flow in the pipeline by adjusting the opening of the continuous flow (1) of the online hydrogen meter, so that the flow reading of the flowmeter (5) is 200 +/-20 ml/min;
s4, after the reading of the online hydrogen meter (3) is stable, reading the displayed reading and recording the measurement result;
and S5, closing an outlet valve of the continuous flow (1) of the online hydrogen meter, and disconnecting a connecting pipeline of each device to finish measurement.
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| JP2011196962A (en) * | 2010-03-24 | 2011-10-06 | Hitachi-Ge Nuclear Energy Ltd | Method and apparatus for monitoring hydrogen concentration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5292136B2 (en) * | 2009-03-16 | 2013-09-18 | オルガノ株式会社 | Method for measuring dissolved nitrogen concentration and measuring device for dissolved nitrogen concentration |
| JP5342463B2 (en) * | 2010-01-08 | 2013-11-13 | オルガノ株式会社 | Dissolved hydrogen concentration measuring device and dissolved hydrogen concentration measuring method |
| JP2015114251A (en) * | 2013-12-13 | 2015-06-22 | 日立Ｇｅニュークリア・エナジー株式会社 | Dissolved hydrogen concentration measuring method, dissolved hydrogen concentration measuring apparatus, and nuclear power plant operation method |
| CN209525936U (en) * | 2018-12-25 | 2019-10-22 | 中核核电运行管理有限公司 | Nuclear power plant's main system dissolved hydrogen measures attachment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58215549A (en) * | 1982-06-09 | 1983-12-15 | Hitachi Ltd | Measuring apparatus of concentration of dissolved oxygen |
| JPS59114461A (en) * | 1982-12-22 | 1984-07-02 | Hokkaido Electric Power Co Inc:The | Apparatus for measuring dissolved hydrogen |
| JPS59174748A (en) * | 1983-03-25 | 1984-10-03 | Hitachi Ltd | Apparatus for measuring concentration of dissolved gas |
| CN2225682Y (en) * | 1995-01-10 | 1996-04-24 | 电力工业部电力科学研究院 | On line monitor for detecting dissolved hydrogen in tranformer oil |
| JP2011196962A (en) * | 2010-03-24 | 2011-10-06 | Hitachi-Ge Nuclear Energy Ltd | Method and apparatus for monitoring hydrogen concentration |
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