CN112712909B - Feeding device for soluble neutron poison - Google Patents
Feeding device for soluble neutron poison Download PDFInfo
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- CN112712909B CN112712909B CN202011314000.0A CN202011314000A CN112712909B CN 112712909 B CN112712909 B CN 112712909B CN 202011314000 A CN202011314000 A CN 202011314000A CN 112712909 B CN112712909 B CN 112712909B
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- neutron poison
- tank body
- soluble neutron
- concentration
- metering tank
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- 239000002574 poison Substances 0.000 title claims abstract description 132
- 231100000614 poison Toxicity 0.000 title claims abstract description 132
- 238000002360 preparation method Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000000126 substance Substances 0.000 claims abstract description 20
- 238000000053 physical method Methods 0.000 claims abstract description 5
- 230000005587 bubbling Effects 0.000 claims description 23
- 238000005070 sampling Methods 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 238000004458 analytical method Methods 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 18
- 239000007788 liquid Substances 0.000 description 13
- 238000002156 mixing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000012527 feed solution Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000002915 spent fuel radioactive waste Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- MWFSXYMZCVAQCC-UHFFFAOYSA-N gadolinium(iii) nitrate Chemical compound [Gd+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O MWFSXYMZCVAQCC-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/20—Disposal of liquid waste
- G21F9/22—Disposal of liquid waste by storage in a tank or other container
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/02—Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids
-
- 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
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- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a feeding device of soluble neutron poison, which comprises: a preparation groove; a metering tank, comprising: the metering tank body is connected with the preparation tank, and the nuclear measuring instrument is used for measuring and calculating the concentration of the soluble neutron poison in the metering tank body by a nuclear physical method; and the controller is used for receiving the concentration of the calculated soluble neutron poison measured by the nuclear measuring instrument, measuring and calculating the concentration of the soluble neutron poison in the metering tank body according to the concentration of the soluble neutron poison in the metering tank body detected by a chemical method and the concentration of the soluble neutron poison in the metering tank body measured by the nuclear measuring instrument, and controlling the opening and closing of a first valve on a connecting pipeline between a discharge port of the metering tank body and the reactor. The invention adopts the feeding device of the soluble neutron poison to control the nuclear critical safety, improves the processing capacity of the reactor, reduces or even eliminates the limit of the nuclear critical safety on the geometric dimension of the equipment, and is beneficial to reducing the heights of the equipment chamber and the hot chamber and reducing the investment and the operation cost of a factory building.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel aftertreatment, and particularly relates to a feeding device for soluble neutron poison.
Background
In the process of treating the spent fuel assembly of the nuclear power station by the PUREX water method, firstly, the spent fuel is needed to be cut into short sections with a certain length, and nitric acid and UO2 pellets in the short sections of the fuel are subjected to dissolution reaction in a reactor. Since the fissionable nuclides such as U235 and Pu239 exist during dissolution, critical safety issues must be considered. At present, critical safety control is carried out by adopting geometric good and solid neutron poison at home, and the processing capacity is limited by the size of equipment.
With the development of the technology in the post-treatment field, the initial enrichment degree and burnup of U235 in the spent fuel assembly are higher and higher, the requirements on the treatment capacity of the reactor are larger and larger, and the critical safety control requirements cannot be met by adopting a method of geometric dimension or solid neutron poison. The soluble neutron poison can greatly reduce or even remove the limit of critical safety on the equipment size, and improve the processing capacity. Thus, more and more foreign post-treatment plants employ soluble neutron poison control for critical safety, such as the THORP plant in the United kingdom and the Baweil plant in the United states. The charging method of the soluble neutron poison aiming at the reactor at abroad is simple at present, and the prepared soluble neutron poison solution is directly added into the reactor. The use points of the soluble neutron poison are more, so that the discharge direction of the soluble neutron poison is not unique, and the risk of material mixing exists.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a feeding device for soluble neutron poison, wherein the concentration of the soluble neutron poison in feed liquid fed into a reactor can be determined after the soluble neutron poison enters a metering tank, so that the critical safety of the reactor is ensured.
The technical scheme adopted for solving the technical problems of the invention is to provide a feeding device for soluble neutron poison, which comprises:
a formulation tank for formulating a soluble neutron poison solution;
a metering tank, comprising: the reactor comprises a metering tank body, a nuclear measuring instrument connected with the metering tank body and used for detecting the concentration of soluble neutron poison in the metering tank body, wherein the metering tank body is connected with a preparation tank, the nuclear measuring instrument is used for measuring and calculating the concentration of the soluble neutron poison in the metering tank body by a nuclear physical method, and a metering tank body discharge hole used for feeding a reactor is arranged on the metering tank body;
and the controller is used for receiving the concentration of the calculated soluble neutron poison measured by the nuclear measuring instrument, measuring and calculating the concentration of the soluble neutron poison in the metering tank body according to the concentration of the soluble neutron poison in the metering tank body detected by a chemical method and the concentration of the soluble neutron poison in the metering tank body measured by the nuclear measuring instrument, and controlling the opening and closing of a first valve on a connecting pipeline between a discharge port of the metering tank body and the reactor.
Preferably, the controller is further configured to control opening and closing of the second valve on the connection line between the preparation tank and the metering tank according to the concentration of the soluble neutron poison in the preparation tank detected by the chemical method, and if the concentration of the soluble neutron poison in the preparation tank reaches a preset concentration, the controller controls the second valve to be opened.
Preferably, the concentration of the soluble neutron poison in the preparation tank is detected by the chemical method according to the controller, and the sampling analysis is carried out at least twice, so that the sampling analysis result is uniform.
Preferably, if the concentration of the soluble neutron poison in the tank body detected by the chemical method and the concentration of the soluble neutron poison measured and calculated by the nuclear measuring instrument are both preset concentrations, the controller controls the first valve to be opened.
Preferably, the concentration of the soluble neutron poison in the tank body of the measuring tank is detected by the chemical method according to the controller, and the sampling analysis is carried out at least twice, so that the sampling analysis result is uniform.
Preferably, the preparing groove comprises a first annular groove and a second annular groove arranged on the periphery of the first annular groove, and the nuclear measuring instrument is arranged on the outer wall of the second annular groove, wherein the first annular groove is used for filling a filler for absorbing neutrons, and the second annular groove is used for containing the prepared soluble neutron poison solution.
Preferably, the metering tank body is a flat tank.
Preferably, the preparation tank comprises a preparation tank body and a first bubbling stirring pipe arranged in the preparation tank body, wherein the first bubbling stirring pipe is used for bubbling and stirring the soluble neutron poison solution in the preparation tank body;
the metering tank body is internally provided with a second bubbling stirring pipe which is used for bubbling and stirring the soluble neutron poison solution in the metering tank body.
Preferably, the feeding device of the soluble neutron poison further comprises:
the first storage tank is used for storing water, and the outlet of the first storage tank is connected with the preparation tank;
the second storage tank is used for storing acid, and the outlet of the first storage tank is connected with the preparation tank;
and the third storage tank is used for storing the soluble neutron poison, and the outlet of the first storage tank is connected with the preparation tank.
Preferably, the feeding device of the soluble neutron poison further comprises:
the first air lifter is arranged on a connecting pipeline between the preparation tank and the metering tank body and is used for lifting the soluble neutron poison solution into the metering tank body;
the second air lifter is arranged on a connecting pipeline between the discharge port of the metering tank body and the reactor, and the second air lifter is used for lifting the soluble neutron poison solution into the reactor.
Compared with the prior art, the invention has the beneficial effects that:
(1) The feeding device of the soluble neutron poison is adopted to control the nuclear critical safety, the processing capacity of the reactor is improved, the limit of the nuclear critical safety on the geometric dimension of equipment is reduced or even eliminated, the diameter of the reactor can be increased, the height of the reactor can be reduced, and the height of the equipment chamber and the hot chamber can be reduced, so that the investment of a factory building and the running cost can be reduced.
(2) After the soluble neutron poison enters the metering tank, the concentration of the soluble neutron poison in the feed liquid added into the reactor can be determined, so that the critical safety of the reactor is ensured.
(3) The discharge of the metering tank has unique directivity to the reactor, and the problems of material mixing and the like can be avoided in process arrangement, so that the concentration of soluble neutron poison is reduced, and further, the critical accident of the reactor is caused.
Drawings
FIG. 1 is a schematic diagram of the structure of a feeding device for a soluble neutron poison in example 2 of the present invention;
FIG. 2 is a front view of the preparation tank in example 2 of the present invention;
FIG. 3 is a top view of the preparation tank in example 2 of the present invention;
fig. 4 is a front view of the metering tank in embodiment 2 of the present invention.
In the figure: 1-a preparation tank; 2-a metering tank; 3-measuring the groove body; 4-nuclear gauge; 5-a first valve; 6-a second valve; 7-a first annular groove; 8-a second annular groove; 9-filling; 10-a first bubbling agitating pipe; 11-a second bubbling agitating pipe; 12-a first call pipe; 13-a second call pipe; 14-a first reservoir; 15-a second reservoir; 16-a third sump; 17-a first air lifter; 18-a second air lifter; 19-reactor.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present invention to those skilled in the art.
Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.
Example 1
The embodiment provides a feeding device of soluble neutron poison, including:
a formulation tank for formulating a soluble neutron poison solution;
a metering tank, comprising: the reactor comprises a metering tank body, a nuclear measuring instrument connected with the metering tank body and used for detecting the concentration of soluble neutron poison in the metering tank body, wherein the metering tank body is connected with a preparation tank, the nuclear measuring instrument is used for measuring and calculating the concentration of the soluble neutron poison in the metering tank body by a nuclear physical method, and a metering tank body discharge hole used for feeding a reactor is arranged on the metering tank body;
and the controller is used for receiving the concentration of the calculated soluble neutron poison measured by the nuclear measuring instrument, measuring and calculating the concentration of the soluble neutron poison in the metering tank body according to the concentration of the soluble neutron poison in the metering tank body detected by a chemical method and the concentration of the soluble neutron poison in the metering tank body measured by the nuclear measuring instrument, and controlling the opening and closing of a first valve on a connecting pipeline between a discharge port of the metering tank body and the reactor.
Compared with the prior art, the invention has the beneficial effects that:
(1) The feeding device of the soluble neutron poison is adopted to control the nuclear critical safety, the processing capacity of the reactor is improved, the limit of the nuclear critical safety on the geometric dimension of equipment is reduced or even eliminated, the diameter of the reactor can be increased, the height of the reactor can be reduced, and the height of the equipment chamber and the hot chamber can be reduced, so that the investment of a factory building and the running cost can be reduced.
(2) After the soluble neutron poison enters the metering tank, the concentration of the soluble neutron poison in the feed liquid added into the reactor can be determined, so that the critical safety of the reactor is ensured.
(3) The discharge of the metering tank has unique directivity to the reactor, and the problems of material mixing and the like can be avoided in process arrangement, so that the concentration of soluble neutron poison is reduced, and further, the critical accident of the reactor is caused.
Example 2
As shown in fig. 1, this embodiment provides a feeding device for soluble neutron poison, including:
a preparation tank 1 for preparing a soluble neutron poison solution;
a metering tank 2 comprising: the device comprises a metering tank body 3, a nuclear measuring instrument 4 connected with the metering tank body 3 and used for detecting the concentration of soluble neutron poison in the metering tank body 3, wherein the metering tank body 3 is connected with a preparation tank 1, the nuclear measuring instrument 4 is used for measuring and calculating the concentration of the soluble neutron poison in the metering tank body 3 by a nuclear physical method, and a discharge hole of the metering tank body 3 used for feeding a reactor 19 is arranged on the metering tank body 3;
and the controller is used for receiving the concentration of the calculated soluble neutron poison measured by the nuclear measuring instrument 4, measuring and calculating the concentration of the soluble neutron poison in the metering tank body 3 by the nuclear measuring instrument 4 according to the concentration of the soluble neutron poison in the metering tank body 3 detected by a chemical method, and controlling the opening and closing of the first valve 5 on a connecting line between a discharge port of the metering tank body 3 and the reactor 19. The discharge port of the metering tank body 3 has unique directivity to the reactor 19, i.e. the metering tank body 3 has only one discharge port pointing to the reactor 19.
Preferably, the soluble neutron poison is gadolinium nitrate and/or chromium nitrate. The method for charging using the charging device in this embodiment includes the steps of: firstly, determining the required concentration of the soluble neutron poison, adding the soluble neutron poison and the solvent into a preparation tank 1, uniformly mixing in the preparation tank 1, then entering a metering tank 2, controlling the opening and closing of a first valve 5 through a controller, and controlling the solution of the soluble neutron poison to enter a reactor 19 again.
The water used in the preparation tank 1 is widely available and may contain radioactivity according to the principle that the water in the engineering sub-item is fully utilized.
Preferably, the controller is further configured to control the opening and closing of the second valve 6 on the connection line between the preparation tank 1 and the metering tank body 3 according to the concentration of the soluble neutron poison in the preparation tank 1 detected by the chemical method, and if the concentration of the soluble neutron poison in the preparation tank 1 reaches a preset concentration, the controller controls the second valve 6 to be opened.
Preferably, the concentration of the soluble neutron poison in the preparation tank 1 is detected by the chemical method according to the controller, and the sampling analysis is carried out at least twice, so that the sampling analysis result is uniform.
Preferably, if the concentration of the soluble neutron poison in the metering tank body 3 detected by the chemical method and the concentration of the soluble neutron poison measured and calculated by the nuclear measuring instrument 4 are both preset concentrations, the controller controls the first valve 5 to be opened.
Preferably, the concentration of the soluble neutron poison in the metering tank body 3 is detected by the chemical method according to the controller and is at least two sampling analysis, and the sampling analysis results reach uniformity.
As shown in fig. 2 to 4, the preparation tank 1 preferably comprises a first annular groove 7 and a second annular groove 8 arranged at the periphery of the first annular groove 7, and the nuclear measuring instrument 4 is arranged on the outer wall of the second annular groove 8, wherein the first annular groove 7 is used for filling a filling 9 for absorbing neutrons, and the second annular groove 8 is used for containing prepared soluble neutron poison solution. Specifically, the filler 9 absorbing neutrons in this embodiment is boron-containing cement, which is used to ensure nuclear critical safety.
Preferably, the metering tank body 3 is a flat tank. The metering tank body 3 has a simple structure, the liquid level in the metering tank body is high, the liquid level is convenient to monitor, and the critical safety of the core can be controlled by the geometric dimension.
Preferably, the preparing tank 1 comprises a preparing tank body and a first bubbling stirring pipe 10 arranged in the preparing tank body, wherein the first bubbling stirring pipe 10 is used for bubbling and stirring the soluble neutron poison solution in the preparing tank body;
the second bubbling stirring pipe 11 is arranged in the metering tank body 3, and the second bubbling stirring pipe 11 is used for bubbling and stirring the soluble neutron poison solution in the metering tank body 3. The material liquid in the tank body of the preparation tank is uniformly distributed by stirring through the first bubbling stirring pipe 10. The dispensing tank body is also provided with a first call pipe 12 for exhausting air. The second bubbling stirring pipe 11 is arranged in the metering tank body 3, and the second bubbling stirring pipe 11 is used for bubbling and stirring the soluble neutron poison solution in the metering tank body 3. A second discharge pipe 13 for discharging air is provided in the metering tank body 3.
Preferably, the feeding device of the soluble neutron poison further comprises:
a first tank 14 for storing water, an outlet of the first tank 14 being connected to the preparation tank 1;
a second tank 15 for storing acid, the outlet of the first tank 14 being connected to the preparation tank 1;
a third reservoir 16 for storing soluble neutron poison, the outlet of the first reservoir 14 being connected to the compounding tank 1.
Preferably, the feeding device of the soluble neutron poison further comprises:
a first air lifter 17, which is arranged on a connecting pipe line between the preparation tank 1 and the metering tank body 3, and the first air lifter 17 is used for lifting the soluble neutron poison solution into the metering tank body 3;
and a second air lifter 18 is arranged on a connecting line between the discharge port of the metering tank body 3 and the reactor 19, and the second air lifter 18 is used for lifting the soluble neutron poison solution into the reactor 19.
The preparation tank 1 is connected to a plurality of nozzles and process equipment, wherein there are a first tank 14, a second tank 15, and a third tank 16. If the pressure of the medium in the process pipeline is too high or too low, the feed liquid can be mixed with air and water in the pipeline, and the risk of material mixing exists, so that the concentration of the soluble neutron poison in the preparation tank 1 is reduced. A first air lifter 17 is arranged on a connecting pipe line between the preparation tank 1 and the metering tank body 3 to lift feed liquid into the metering tank 2, so that material mixing can be prevented. The metering tank 2 is separately arranged in a room, the concentration of the soluble neutron poison is measured by the nuclear measuring instrument 4, and the controller meters and controls the discharge amount. And (3) carrying out multiple sampling analysis in the metering tank body 3 and combining the nuclear measuring instrument 4 to determine the uniformity and effectiveness of the concentration and distribution of the soluble neutron poison, and ensuring that the concentration of the soluble neutron poison reaches a critical safety requirement value and then enters the reactor 19 through the second air lifter 18.
The concentration of the soluble neutron poison is critical to the nuclear critical safety control of the reactor 19, in this embodiment, whether the concentration of the soluble neutron poison meets the requirement of the nuclear critical safety control is confirmed by two independent methods, the first is the chemical method detection concentration: the uniformity of soluble neutron poison concentration and distribution is first determined. After the sampling port is arranged in the preparation tank 1 and bubbling and stirring are uniform, the high-resolution mass spectrometer is used for measuring the concentration of the soluble neutron poison in the sampling feed liquid, a certain allowance (for example, more than 3 g/L) is ensured, and the sampling feed liquid can enter the metering tank 2 after sampling analysis for multiple times until the requirement is met.
A sampling port is also provided in the metering tank 2, and sampling analysis is performed again for a plurality of times before the sample is added into the reactor 19, so as to determine the concentration of the soluble neutron poison. If the multiple sampling feed solution concentrations are the same and within the target range (e.g., 0.3-3 g/L), the concentration and uniformity of the soluble neutron poison can be ensured in order to ensure that the feed solution fed to reactor 19 meets the nuclear critical safety requirements.
The second is the detection concentration of the nuclear measurement method: since the preparing groove 1 is an annular groove, the accuracy of the nuclear measuring device is affected by the boron-containing cement, and therefore, the nuclear measuring instrument 4 is arranged on the outer wall of the second annular groove 8. The neutron source is arranged in the nuclear measuring instrument 4, the neutron number is measured according to the condition of the flux change of neutrons after the measuring tank 2, and the algorithm converts the neutron number into the concentration of the soluble neutron poison. By the two methods, the concentration and uniformity of the soluble neutron poison entering the reactor 19 are confirmed to meet the nuclear critical safety requirements.
The amount of soluble neutron poison in the feed solution is considered a margin when the feed solution is prepared in the preparation tank 1, and the concentration of soluble neutron poison is further verified in the metering tank 2 even if the cross-feed occurs after the sampling analysis. When the sampling analysis and the nuclear measurement in the metering tank 2 meet the requirements, stopping the feeding process of the preparation tank 1, and then feeding the feed liquid in the metering tank 2 into the reactor 19 to participate in the reaction.
Compared with the prior art, the invention has the beneficial effects that:
(1) The adoption of the feeding device of the soluble neutron poison to control the nuclear critical safety improves the processing capacity of the reactor 19, reduces or even eliminates the limit of the nuclear critical safety on the geometric dimension of the equipment, can increase the diameter of the reactor 19 and reduce the height, and is beneficial to reducing the heights of the equipment room and the hot room and reducing the investment and the running cost of a factory building.
(2) After the soluble neutron poison enters the metering tank 2, the concentration of the soluble neutron poison in the feed liquid fed into the reactor 19 can be determined, so that the critical safety of the reactor 19 is ensured.
(3) The discharge of the metering tank 2 has unique directivity to the reactor 19, and problems such as material mixing and the like can be avoided in process arrangement, so that the concentration of soluble neutron poison is reduced, and further, critical accidents of the reactor 19 are caused.
(4) The chemical sampling analysis is carried out on the solution of the soluble neutron poison in the metering tank 2 and the measurement is carried out by combining with the nuclear measuring instrument 4, so that the uniformity and the effectiveness of the distribution of the soluble neutron poison in the feed liquid after being added into the reactor 19 are ensured.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (8)
1. A loading apparatus for a soluble neutron poison, comprising:
a formulation tank for formulating a soluble neutron poison solution;
a metering tank, comprising: the reactor comprises a metering tank body, a nuclear measuring instrument connected with the metering tank body and used for detecting the concentration of soluble neutron poison in the metering tank body, wherein the metering tank body is connected with a preparation tank, the nuclear measuring instrument is used for measuring and calculating the concentration of the soluble neutron poison in the metering tank body by a nuclear physical method, and a metering tank body discharge hole used for feeding a reactor is arranged on the metering tank body;
the controller is used for receiving the concentration of the soluble neutron poison measured and calculated by the nuclear measuring instrument, measuring and calculating the concentration of the soluble neutron poison in the metering tank body by the nuclear measuring instrument according to the concentration of the soluble neutron poison in the metering tank body detected by a chemical method, and controlling the opening and closing of a first valve on a connecting pipeline between a discharge port of the metering tank body and the reactor;
the controller is also used for controlling the opening and closing of a second valve on a connecting pipeline between the preparation tank and the metering tank body according to the concentration of the soluble neutron poison in the preparation tank detected by a chemical method, and if the concentration of the soluble neutron poison in the preparation tank reaches a preset concentration, the controller controls the second valve to be opened;
the preparation groove comprises a first annular groove and a second annular groove arranged on the periphery of the first annular groove, and the nuclear measuring instrument is arranged on the outer wall of the second annular groove, wherein the first annular groove is used for filling a filling material for absorbing neutrons, and the second annular groove is used for containing prepared soluble neutron poison solution.
2. The feeding device for soluble neutron poison according to claim 1, wherein the concentration of the soluble neutron poison in the preparation tank is detected by the controller according to a chemical method, and the concentration is analyzed by at least two samples, and the results of the sampling analysis reach uniformity.
3. The feeding device for soluble neutron poison according to any one of claims 1 to 2, wherein the controller controls the first valve to be opened if the concentration of the soluble neutron poison in the tank body of the metering tank detected by the chemical method and the concentration of the soluble neutron poison calculated by the measurement of the nuclear measuring instrument are both preset concentrations.
4. The feeding device for the soluble neutron poison according to claim 3, wherein the concentration of the soluble neutron poison in the tank body of the metering tank is detected by the controller according to a chemical method, and the sampling analysis is carried out at least twice, so that the sampling analysis results are uniform.
5. The feeding device for soluble neutron poison according to any one of claims 1 to 2 and 4, wherein the metering tank body is a flat tank.
6. The feeding device of the soluble neutron poison according to any one of claims 1 to 2 and 4, wherein the preparing tank comprises a preparing tank body and a first bubbling stirring pipe arranged in the preparing tank body, and the first bubbling stirring pipe is used for bubbling and stirring the soluble neutron poison solution in the preparing tank body;
the metering tank body is internally provided with a second bubbling stirring pipe which is used for bubbling and stirring the soluble neutron poison solution in the metering tank body.
7. The feeding device for soluble neutron poison according to any one of claims 1 to 2 and 4, further comprising:
the first storage tank is used for storing water, and the outlet of the first storage tank is connected with the preparation tank;
the second storage tank is used for storing acid, and the outlet of the first storage tank is connected with the preparation tank;
and the third storage tank is used for storing the soluble neutron poison, and the outlet of the first storage tank is connected with the preparation tank.
8. The soluble neutron poison charging device of claim 7, further comprising:
the first air lifter is arranged on a connecting pipeline between the preparation tank and the metering tank body and is used for lifting the soluble neutron poison solution into the metering tank body;
the second air lifter is arranged on a connecting pipeline between the discharge port of the metering tank body and the reactor, and the second air lifter is used for lifting the soluble neutron poison solution into the reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314000.0A CN112712909B (en) | 2020-11-20 | 2020-11-20 | Feeding device for soluble neutron poison |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314000.0A CN112712909B (en) | 2020-11-20 | 2020-11-20 | Feeding device for soluble neutron poison |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112712909A CN112712909A (en) | 2021-04-27 |
| CN112712909B true CN112712909B (en) | 2024-01-23 |
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| JP2011209028A (en) * | 2010-03-29 | 2011-10-20 | Toshiba Corp | Apparatus and method for inspecting homogeneity of neutron poison |
| CN104730139A (en) * | 2015-03-31 | 2015-06-24 | 清华大学 | Method for analyzing fluorine ion concentration under radioactive condition |
| WO2022017884A1 (en) * | 2020-07-21 | 2022-01-27 | Rolls-Royce Power Engineering Plc | Nuclear reactor and method of opening a nuclear reactor |
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| FR2792079B1 (en) * | 1999-04-08 | 2001-05-25 | Commissariat Energie Atomique | METHOD AND DEVICE FOR ANALYZING RADIOACTIVE OBJECTS |
| US20110002432A1 (en) * | 2009-07-01 | 2011-01-06 | Westinghouse Electric Company Llc | Incore instrument core performance verification method |
| US9266756B2 (en) * | 2012-04-19 | 2016-02-23 | Westinghouse Electric Company Llc | Mobile boration system |
| FR3077412B1 (en) * | 2018-02-01 | 2021-07-23 | Framatome Sa | PROCESS FOR REGULATING THE OPERATING PARAMETERS OF A NUCLEAR REACTOR AND CORRESPONDING NUCLEAR REACTOR |
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| JP2011209028A (en) * | 2010-03-29 | 2011-10-20 | Toshiba Corp | Apparatus and method for inspecting homogeneity of neutron poison |
| CN104730139A (en) * | 2015-03-31 | 2015-06-24 | 清华大学 | Method for analyzing fluorine ion concentration under radioactive condition |
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