CN111239334B - Pulse type generation system and method for radioactive inert gas tracer - Google Patents
Pulse type generation system and method for radioactive inert gas tracer Download PDFInfo
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- CN111239334B CN111239334B CN202010018004.8A CN202010018004A CN111239334B CN 111239334 B CN111239334 B CN 111239334B CN 202010018004 A CN202010018004 A CN 202010018004A CN 111239334 B CN111239334 B CN 111239334B
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- connecting pipe
- inert gas
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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
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0055—Specially adapted to detect a particular component for radionuclides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/405—Concentrating samples by adsorption or absorption
Abstract
The invention relates to a radioactive inert gas tracer pulse type generating system which comprises an inert gas source bottle, a test carrier gas supply source, a compression chamber and a Venturi jet pump, wherein the inert gas source bottle is connected with the compression chamber through a first connecting pipe, the test carrier gas supply source is connected with the compression chamber through a second connecting pipe, the test carrier gas supply source is connected with the Venturi jet pump through a third connecting pipe, the compression chamber is connected with the Venturi jet pump through a fourth connecting pipe, the Venturi jet pump is connected with an experiment pipeline through a fifth connecting pipe, and the compression chamber is connected with the experiment pipeline through a sixth connecting pipe. When the pulse type generation system for the radioactive inert gas tracer agent is used for performing a pulse type injection experiment, the control precision of pulse time and gas injection amount is high, and the test carrier gas and the tracer agent are convenient and concise to switch on a pipeline; the accuracy and the safety of the test are greatly improved.
Description
Technical Field
The invention relates to the technical field of nuclear industry, in particular to a radioactive inert gas tracer pulse type generating system and a method thereof.
Background
Due to the defects of compression storage, in the domestic established pressurized water reactor nuclear power stations, a radioactive inert gas active carbon retention bed system is used for processing the process gas of the nuclear power station in the third period of Qinshan and Tianwan to replace a compression tank storage decay technology. The nuclear power plants in the third generation are all recommended to adopt a radioactive inert gas active carbon retention bed system.
Although at present, there is no relevant standard for the field test of the inert gas treatment system for the process gas treatment of the pressurized water reactor nuclear power plant at home and abroad, and the performance verification test of the waste gas treatment system which is put into operation is not specified in the relevant technical requirement specification. However, after the radioactive waste gas treatment system is installed and debugged or runs for a certain period, whether the performance of the activated carbon retention unit meets the requirement is directly related to the running safety of the nuclear power station.
For the activated carbon retention bed, the following cases require the relevant radioactive inert gas krypton-xenon retention evaluation experiment: (1) Determining whether the activated carbon satisfies design requirements before the activated carbon is used in a nuclear facility radioactive process gas retentate bed; (2) The activated carbon is filled in the nuclear facility on-site after the bed shell is retained and before the formal operation; (3) After the activated carbon adsorbent is filled in the shell of the retention bed, the performance of the retention bed is reduced to a certain extent under the influence of factors such as activated carbon particle friction, activated carbon water adsorption molecules, temperature change and the like caused by airflow flow, so that the performance evaluation test of the activated carbon retention unit is required to be carried out regularly. In evaluating the performance of activated carbon adsorbent or retention bed for radioactive krypton-xenon retention, a pulsed injection of radioactive tracer krypton-xenon gas is typically used. When the existing tracer pulse generation system performs a pulse injection experiment, the accuracy and safety of the experiment are affected by pulse time, gas injection amount, sealing performance and pipeline radioactivity residual amount.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a radioactive inert gas tracer pulse generation system and a method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a radioactive inert gas tracer pulsed generating system, including inert gas source bottle, experimental carrier gas supply source, compression chamber, the venturi jet pump, inert gas source bottle passes through first connecting pipe and connects compression chamber, experimental carrier gas supply source passes through the second connecting pipe and connects compression chamber, experimental carrier gas supply source passes through the third connecting pipe and connects the venturi jet pump, compression chamber passes through the fourth connecting pipe and connects the venturi jet pump, the venturi jet pump passes through the fifth connecting pipe and connects the experiment pipeline, compression chamber passes through the sixth connecting pipe and connects the experiment pipeline.
Furthermore, stop valves are arranged on the first connecting pipe, the second connecting pipe and the third connecting pipe.
Furthermore, the five connecting pipes and the sixth connecting pipe are connected with an experiment pipeline through a three-way valve, the experiment pipeline is connected with an active carbon detention unit, and the active carbon detention unit is filled with an active carbon adsorbent.
Further, the test carrier gas flow parameter characteristics of the test carrier gas supply source are as follows: the carrier gas is nitrogen, the relative humidity is less than 20%, and the pressure is lower than 0.8MPa.
Further, the tracer in the inert gas source bottle comprises krypton, xenon, iodine and halogen.
Further, compression chamber adopts stainless steel material, volume to be 0.05-1L, compression chamber have nitrogen gas entry, high concentration spike agent entry, connect venturi export and test system export, nitrogen gas access connection the second connecting pipe, high concentration spike agent access connection first connecting pipe connects the venturi exit linkage fourth connecting pipe, test system exit linkage the sixth connecting pipe.
A pulse generation method of radioactive inert gas tracer comprises the following steps:
a. the performance of active carbon adsorbent for adsorbing and retaining radioactive krypton is evaluated, and the retention time or dynamic adsorption coefficient is tested, wherein the compression chamber is connected to an inert gas source bottle, and the inert gas in the inert gas source bottle is krypton;
b. opening a stop valve on the first connecting pipe, releasing a certain volume of radioactive krypton into the compression chamber, closing the stop valve on the first connecting pipe, opening a stop valve on the second connecting pipe, connecting the test carrier gas supply source with the compression chamber, and closing the stop valve on the second connecting pipe when the pressure in the compression chamber is increased to 0.2 Mpa;
c. after experimental system operating parameter is stable, open stop valve and the three-way valve on the third connecting pipe, through the tracer gas (krypton) of venturi jet pump towards active carbon retention unit pulse injection compression chamber in, when the manometer shows unchangeably, close stop valve and the three-way valve on the third connecting pipe, accomplish the pulse injection, begin to measure active carbon bed upper and lower reaches radioactive tracer active concentration of active carbon retention unit.
The invention has the beneficial effects that: when the pulse type generation system for the radioactive inert gas tracer agent performs a pulse type injection experiment, the control precision of the pulse time and the gas injection amount is high, and the test carrier gas and the tracer agent are convenient and concise to switch on a pipeline; the accuracy and the safety of the test are greatly improved.
Drawings
FIG. 1 is a schematic view of the present invention.
Detailed Description
As shown in fig. 1, a radioactive inert gas tracer pulse type generating system, which comprises an inert gas source bottle 1, a test carrier gas supply source 2, a compression chamber 3, a venturi jet pump 4, wherein the inert gas source bottle 1 is connected with the compression chamber 3 through a first connecting pipe 5, the test carrier gas supply source 2 is connected with the compression chamber 3 through a second connecting pipe 6, the test carrier gas supply source 2 is connected with the venturi jet pump 4 through a third connecting pipe 7, the compression chamber 3 is connected with the venturi jet pump 4 through a fourth connecting pipe 8, the venturi jet pump 4 is connected with an experiment pipeline 10 through a fifth connecting pipe 9, and the compression chamber 3 is connected with the experiment pipeline 10 through a sixth connecting pipe 11.
The first connecting pipe 5, the second connecting pipe 6 and the third connecting pipe 7 are provided with stop valves 12.
The five connecting pipes 9 and the sixth connecting pipe 11 are connected with an experimental pipeline 10 through a three-way valve 13, the experimental pipeline 10 is connected with an active carbon detention unit, and the active carbon detention unit is filled with an active carbon adsorbent.
Further, the test carrier gas flow parameters of the test carrier gas supply source 2 are characterized by: the carrier gas is nitrogen, the relative humidity is less than 20%, and the pressure is lower than 0.8MPa. The tracer in the inert gas source bottle 1 is one of krypton, xenon, iodine and halogen.
A pulse generation method of radioactive inert gas tracer comprises the following steps:
in order to evaluate the performance of the activated carbon adsorbent for adsorbing and retaining the radioactive krypton, the retention time or dynamic adsorption coefficient is tested as follows:
a. connecting the compression chamber to an inert gas source bottle 1, wherein the inert gas in the inert gas source bottle 1 is krypton;
b. opening a stop valve 12 on a first connecting pipe 5, releasing a certain volume of radioactive krypton into a compression chamber 3, closing the stop valve 12 on the first connecting pipe 5, opening the stop valve 12 on a second connecting pipe 6, connecting a test carrier gas supply source 2 with the compression chamber 3, and closing the stop valve 12 on the second connecting pipe 6 when the pressure in the compression chamber 3 is increased to 0.2 Mpa;
c. after the operation parameters of the experimental system are stable, the stop valve 12 and the three-way valve 13 on the third connecting pipe 7 are opened, the tracer gas (krypton) in the compression chamber is injected towards the activated carbon retention unit through the venturi jet pump 4 in a pulse mode, when the pressure gauge shows that the pressure gauge is unchanged, the stop valve 12 and the three-way valve 13 on the third connecting pipe 7 are closed, the pulse injection is completed, and the active concentration of the active tracer in the upstream and the downstream of the activated carbon bed of the activated carbon retention unit is measured.
When the pulse type generation system for the radioactive inert gas tracer agent performs a pulse type injection experiment, the control precision of the pulse time and the gas injection amount is high, and the test carrier gas and the tracer agent are convenient and concise to switch on a pipeline; the accuracy and the safety of the test are greatly improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A radioactive inert gas tracer pulse type generating system is characterized by comprising an inert gas source bottle, a test carrier gas supply source, a compression chamber and a Venturi jet pump, wherein the inert gas source bottle is connected with the compression chamber through a first connecting pipe;
stop valves are arranged on the first connecting pipe, the second connecting pipe and the third connecting pipe;
the fifth connecting pipe and the sixth connecting pipe are connected with an experiment pipeline through a three-way valve, the experiment pipeline is connected with an active carbon detention unit, and the active carbon detention unit is filled with an active carbon adsorbent.
2. A pulsed generation system for a radioactive inert gas tracer according to claim 1, wherein the test carrier gas flow parameters of the test carrier gas supply are characterized by: the carrier gas is nitrogen, the relative humidity is less than 20%, and the pressure is lower than 0.8Mpa.
3. A radioactive inert gas tracer pulse generation system according to claim 2, wherein the tracer in the inert gas source bottle comprises krypton, xenon, or halogen.
4. The pulsed generation system of claim 3, wherein the compression chamber is made of stainless steel and has a volume of 0.05-1L, and has a nitrogen inlet, a high concentration tracer inlet, a venturi outlet, and a test system outlet, the nitrogen inlet is connected to the second connection pipe, the high concentration tracer inlet is connected to the first connection pipe, the venturi outlet is connected to the fourth connection pipe, and the test system outlet is connected to the sixth connection pipe.
5. A pulsed generation method of a radioactive inert gas tracer using the system of claim 1, comprising the steps of:
a. the performance of active carbon adsorbent for adsorbing and retaining radioactive krypton is evaluated, and the retention time or dynamic adsorption coefficient is tested, wherein the compression chamber is connected to an inert gas source bottle, and the inert gas in the inert gas source bottle is krypton;
b. opening a stop valve on a first connecting pipe, releasing a certain volume of radioactive krypton into a compression chamber, closing the stop valve on the first connecting pipe, opening a stop valve on a second connecting pipe, connecting a test carrier gas supply source with the compression chamber, and closing the stop valve on the second connecting pipe when the pressure in the compression chamber is increased to 0.2 Mpa;
c. after experimental system operating parameter is stable, open stop valve and the three-way valve on the third connecting pipe, through the activated carbon retention unit pulse injection compression chamber indoor krypton of venturi jet pump, when the manometer shows unchangeably, close stop valve and the three-way valve on the third connecting pipe, accomplish the pulse injection, begin to measure the active carbon bed upper and lower reaches radiotracer active concentration of activated carbon retention unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010018004.8A CN111239334B (en) | 2020-01-08 | 2020-01-08 | Pulse type generation system and method for radioactive inert gas tracer |
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| CN202010018004.8A CN111239334B (en) | 2020-01-08 | 2020-01-08 | Pulse type generation system and method for radioactive inert gas tracer |
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| CN111239334A CN111239334A (en) | 2020-06-05 |
| CN111239334B true CN111239334B (en) | 2022-10-21 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD207122A3 (en) * | 1981-09-22 | 1984-02-15 | Norbert Beiermann | METHOD OF MEASURING THE SOLIDS MASS FLOW |
| CN105572298B (en) * | 2014-10-13 | 2019-07-02 | 中国辐射防护研究院 | Radioactive emission processing unit inert gas is detained bed Properties of Activated Carbon pilot system |
| CN107655634B (en) * | 2016-07-26 | 2020-04-24 | 中国辐射防护研究院 | Pulse type halogen gas generator |
| CN106838590B (en) * | 2017-04-10 | 2019-07-12 | 东莞安默琳机械制造技术有限公司 | High-pressure pneumatic pulse micro lubricant mist supply system |
| CN110068428B (en) * | 2019-03-29 | 2021-08-17 | 中国辐射防护研究院 | Iodine adsorber leakage rate on-line measuring system and measuring method thereof |
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