CN107068223B - A kind of CPR1000 nuclear power plant boron recovery system reducing dosage rate - Google Patents

A kind of CPR1000 nuclear power plant boron recovery system reducing dosage rate Download PDF

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Publication number
CN107068223B
CN107068223B CN201710175425.XA CN201710175425A CN107068223B CN 107068223 B CN107068223 B CN 107068223B CN 201710175425 A CN201710175425 A CN 201710175425A CN 107068223 B CN107068223 B CN 107068223B
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China
Prior art keywords
coolant
desalination
valve
pipeline
boron
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CN201710175425.XA
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Chinese (zh)
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CN107068223A (en
Inventor
张士朋
周富涛
李琪
张文利
蒲江
那福利
贺群武
陈秋炀
杨腊腊
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China General Nuclear Power Corp
CGN Power Co Ltd
Daya Bay Nuclear Power Operations and Management Co Ltd
Lingdong Nuclear Power Co Ltd
Guangdong Nuclear Power Joint Venture Co Ltd
Suzhou Nuclear Power Research Institute Co Ltd
Original Assignee
China General Nuclear Power Corp
CGN Power Co Ltd
Daya Bay Nuclear Power Operations and Management Co Ltd
Lingdong Nuclear Power Co Ltd
Guangdong Nuclear Power Joint Venture Co Ltd
Suzhou Nuclear Power Research Institute Co Ltd
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Application filed by China General Nuclear Power Corp, CGN Power Co Ltd, Daya Bay Nuclear Power Operations and Management Co Ltd, Lingdong Nuclear Power Co Ltd, Guangdong Nuclear Power Joint Venture Co Ltd, Suzhou Nuclear Power Research Institute Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN201710175425.XA priority Critical patent/CN107068223B/en
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    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21DNUCLEAR POWER PLANT
    • G21D1/00Details of nuclear power plant
    • G21D1/02Arrangements of auxiliary equipment
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin

Abstract

The present invention relates to the technical fields of the demineralizer of nuclear power plant's boron recovery system, there is provided the CPR1000 nuclear power plant boron recovery system for reducing dosage rate comprising coolant collecting pipeline, desalination device, deaerator, intermediate storage water tank, boron separator, water container, boric acid container, recycles pipeline, bypass line, bypath valve and desalination valve at preposition storage water tank.When nuclear power plant is in coolant degassing process operating condition, by opening bypath valve and closing desalination valve, coolant flow is set to flow into deaerator again after bypass line, which obviate coolant flows to be absorbed through LiOH when desalination device by desalination device, reduce LiOH dosage, it is ensured that the pH value of coolant balances, and reduces cooling circuit corrosion product deposition, dosage rate during reduction overhaul, reduces cost.

Description

A kind of CPR1000 nuclear power plant boron recovery system reducing dosage rate
Technical field
The invention belongs to the technical fields of the demineralizer of nuclear power plant's boron recovery system, more particularly to reduce dosage rate CPR1000 nuclear power plant boron recovery system.
Background technique
Currently, need to be de-gassed to the coolant in the primary Ioops at reactor core before entering the cold shutdown of nuclear power station Processing.When the fuel assembly in reactor core occurs damaged, the degassing process time is 15 days before power station solution is netted;And when combustion When expecting that component is normal, in the hydrogen in the solution net exhaust gas of power station and degassing process in 12 hours before oxygen separation.Due to one time LiOH can be dissolved in the coolant of road, for controlling the pH value of coolant, reduce the deposition of the corrosion product in primary coolant circuit pipe. But in existing design, primary Ioops coolant has to flow through the desalination device of boron recovery system (TEP) when being de-gassed, this will Cause the LiOH dissolved in primary Ioops coolant to be absorbed by desalination device, to cause the loss of LiOH, leads to the pH value of coolant It reduces, destroys the balance of pH value.Influence of the concentration of LiOH to primary Ioops coolant pH value is more sensitive, the summary of LiOH concentration Microvariations will cause pH value tempestuously to change very much, this brings difficulty to the control of running primary Ioops coolant pH value. It is unstable due to pH value, so that the deposition that will lead to corrosion product in primary Ioops increases, the increase of dosage rate during overhaul, at This height.
Summary of the invention
The purpose of the present invention is to provide a kind of CPR1000 nuclear power plant boron recovery systems for reducing dosage rate, it is intended to solve Dosage rate is big and at high cost during there is LiOH loss, overhaul when existing nuclear power plant's boron recovery system desalination.
In order to solve the above technical problems, the present invention provides a kind of CPR1000 nuclear power plant boron for reducing dosage rate to recycle system System, comprising:
Coolant collecting pipeline, for receiving coolant;
Preposition storage water tank, for caching the coolant for the shape that is in a liquid state;
Desalination device, for being filtered desalination to the coolant;
Deaerator, for removing the gas in the coolant;
Intermediate storage water tank, for caching the coolant for the shape that is in a liquid state;
Boron separator, for in the coolant boric acid and water separate;
Water container, the water for storing liquid shape;
Boric acid container, the boric acid for storing liquid shape;
Pipeline is recycled, the boric acid and the water can be transported to reactor coolant loop;
Bypass line, for bypassing the pipeline of the desalination device;
Bypath valve, for controlling the isolation or unlatching of the bypass line;
Desalination valve, for controlling the isolation or unlatching of the desalination device.
The coolant collecting pipeline, the preposition storage water tank, the desalination device, the deaerator, the intermediate storage Water tank and the boron separator are sequentially connected by pipeline, the boron separator by pipeline and the water container and The boric acid container connection, the water container and boric acid storage are connected to by pipeline with pipeline is recycled.
Bypass line is also communicated between the preposition storage water tank and the deaerator, the bypass line is equipped with side Port valve door, the pipeline between the preposition storage water tank and the desalination device are equipped with desalination valve, the reduction dosage rate CPR1000 nuclear power plant boron recovery system further includes connecting and with the bypath valve and the desalination valve in degassing process respectively The bypath valve is opened when operating condition and closes the controller of the desalination valve.
It is provided by the invention reduce dosage rate CPR1000 nuclear power plant boron recovery system the utility model has the advantages that
The CPR1000 nuclear power plant boron recovery system of above-mentioned reduction dosage rate uses bypass line, bypath valve, desalination valve Door and controller, the circulation path of coolant have two, and one is: when cooling circuit is in the operating condition other than degassing process When, controller will open desalination valve and close bypath valve, and coolant is followed by coolant collecting pipeline, preposition storage water Case, desalination valve, desalination device, deaerator, intermediate storage water tank, boron separator, the water that boron separator is isolated flow into water Container, boric acid flow into boric acid container, and water and boric acid flow into that recycle pipeline to be transported to reactor cold according still further to special ratios But agent system.Another is: when cooling circuit is in degassing process operating condition, controller will open bypath valve and close desalination Valve so that coolant flow is to bypass line, without flowing to desalination device, at this point, coolant followed by coolant collecting pipeline, Preposition storage water tank, bypass line, deaerator, intermediate storage water tank, boron separator, the water that boron separator is isolated flow into Water container, boric acid flow into boric acid container, water and boric acid and recycle pipeline to be transported to reactor according still further to special ratios inflow Coolant system;In this way, when cooling circuit is in degassing process operating condition, by using controller, bypass line, bypath valve And desalination valve, which obviate coolant flows to be absorbed through LiOH when desalination device by desalination device, causes the loss of LiOH, and will not lead Causing the pH value of coolant reduces, it is ensured that the balance of pH value reduces the deposition of corrosion product in cooling circuit, reduces agent during overhaul Dose rate reduces cost.
Detailed description of the invention
Fig. 1 is the structural representation of the CPR1000 nuclear power plant boron recovery system provided in an embodiment of the present invention for reducing dosage rate Figure.
Description of symbols:
11- coolant collecting pipeline, the preposition storage water tank of 12-, 13- desalination device, 14- deaerator, 15- intermediate storage water Case, 16- boron separator, 17- water container, 18- boric acid container, 19- recycle pipeline, 20- bypass line, 21- bypass Valve, 22- desalination valve.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
As shown in Figure 1, being preferred embodiment provided by the invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.
It should also be noted that, the positional terms such as left and right, upper and lower in the present embodiment, be only each other relative concept or It is reference with the normal operating condition of product, and should not be regarded as restrictive.
As shown in Figure 1, the CPR1000 nuclear power plant boron recovery system provided in this embodiment for reducing dosage rate, comprising:
Coolant collecting pipeline 11, for receiving coolant;
Preposition storage water tank 12, for caching the coolant for the shape that is in a liquid state;
Desalination device 13, for being filtered desalination to the coolant;
Deaerator 14, for removing the gas in the coolant;
Intermediate storage water tank 15, for caching the coolant for the shape that is in a liquid state;
Boron separator 16, for in the coolant boric acid and water separate;
Water container 17, the water for storing liquid shape;
Boric acid container 18, the boric acid for storing liquid shape;
Pipeline 19 is recycled, boric acid and water can be transported to reactor coolant loop;
Bypass line 20, for bypassing the pipeline of desalination device;
Bypath valve 21, for controlling the isolation or unlatching of bypass line;
Desalination valve 22, for controlling the isolation or unlatching of desalination device.
Coolant collecting pipeline 11, preposition storage water tank 12, desalination device 13, deaerator 14, intermediate storage water tank 15 and boron Separator 16 is sequentially connected by pipeline, and boron separator 16 is connected by pipeline and water container 17 and boric acid container 18 Logical, water container 17 and boric acid container 18 are connected to by pipeline with pipeline 19 is recycled.
Bypass line 20 is also communicated between preposition storage water tank 12 and deaerator 14, bypass line 20 is equipped with by-passing valve Door 21, the pipeline between preposition storage water tank 12 and desalination device 13 are equipped with desalination valve 22, reduce the CPR1000 core of dosage rate Power plant's boron recovery system further includes connecting and opening when degassing process operating condition other with bypath valve 21 and desalination valve 22 respectively Port valve door 21 and the controller for closing desalination valve 22.
The CPR1000 nuclear power plant boron recovery system of above-mentioned reduction dosage rate uses bypass line 20, bypath valve 21, removes Salt valve 22 and controller, the circulation path of coolant have two, and one is: when nuclear power plant is in the work other than degassing process When condition, when coolant is by operating condition other than cooling circuit is in degassing process, controller will open desalination valve 22 and close Bypath valve 21, coolant followed by coolant collecting pipeline 11, preposition storage water tank 12, desalination valve 22, desalination device 13, Deaerator 14, intermediate storage water tank 15, boron separator 16, the water that boron separator 16 is isolated flow into water container 17, boron Acid flows into boric acid container 18, water and boric acid and recycles pipeline 19 to be transported to reactor coolant system according still further to special ratios inflow System.Another is: when cooling circuit is in degassing process operating condition, controller will open bypath valve 21 and close desalination valve 22, so that coolant flow is to bypass line 20, without flowing to desalination device 13, at this point, coolant is followed by coolant collecting pipe Line 11, preposition storage water tank 12, bypass line 20, deaerator 14, intermediate storage water tank 15, boron separator 16, the separation of boron water The water that device 16 is isolated flows into water container 17, and boric acid flows into boric acid container 18, water and boric acid and flows into according still further to special ratios Pipeline 19 is recycled to be transported to reactor coolant loop;In this way, when cooling circuit is in degassing process operating condition, by using Controller, bypass line 20, bypath valve 21 and desalination valve 22, which obviate coolant flows to be removed through LiOH when desalination device 13 Salt device 13 absorbs, and causes the loss of LiOH, and the pH value that not will lead to coolant reduces, it is ensured that the balance of pH value reduces cooling The deposition of corrosion product in circuit reduces dosage rate during overhaul, reduces cost.
It should be noted that CPR1000 is technical field of nuclear power idiom, CPR1000 represents Chinese modified Three links theory Presurized water reactor.
It should be noted that degassing process operating condition is the common operating condition at reactor core in technical field of nuclear power.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.

Claims (1)

1. a kind of CPR1000 nuclear power plant boron recovery system for reducing dosage rate, comprising:
Coolant collecting pipeline, for receiving coolant;
Preposition storage water tank, for caching the coolant for the shape that is in a liquid state;
Desalination device, for being filtered desalination to the coolant;
Deaerator, for removing the gas in the coolant;
Intermediate storage water tank, for caching the coolant for the shape that is in a liquid state;
Boron separator, for in the coolant boric acid and water separate;
Water container, the water for storing liquid shape;
Boric acid container, the boric acid for storing liquid shape;
Pipeline is recycled, the boric acid and the water can be transported to reactor coolant loop;
Bypass line, for bypassing the pipeline of the desalination device;
Bypath valve, for controlling the isolation or unlatching of the bypass line;
Desalination valve, for controlling the isolation or unlatching of the desalination device;
The coolant collecting pipeline, the preposition storage water tank, the desalination device, the deaerator, the intermediate storage water Case and the boron separator are sequentially connected by pipeline, and the boron separator passes through pipeline and the water container and described The connection of boric acid container, the water container and the boric acid container are connected to by pipeline with pipeline is recycled;
Bypass line is also communicated between the preposition storage water tank and the deaerator, the bypass line is equipped with by-passing valve Door, the pipeline between the preposition storage water tank and the desalination device are equipped with desalination valve, the reduction dosage rate CPR1000 nuclear power plant boron recovery system further includes connecting and with the bypath valve and the desalination valve in degassing process respectively The bypath valve is opened when operating condition and closes the controller of the desalination valve.
CN201710175425.XA 2017-03-22 2017-03-22 A kind of CPR1000 nuclear power plant boron recovery system reducing dosage rate Active CN107068223B (en)

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CN109166636A (en) * 2018-08-06 2019-01-08 广东核电合营有限公司 A kind of system and method that compacted clay liners primary Ioops uninterruptedly purify
CN112145966B (en) * 2020-08-28 2022-05-27 岭东核电有限公司 Deaerator starting control method, device and equipment and deaeration system for nuclear power plant

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US7708890B2 (en) * 2006-12-11 2010-05-04 Diversified Technologies Services, Inc. Method of rendering a radioactive and aqueous heat transfer liquid in a nuclear reactor to a reduced radwaste quantitative state and returning the remaining waste water volumes to an environmental release point for liquid effluents
WO2009156547A1 (en) * 2008-06-26 2009-12-30 Acciona Agua, S.A.U. Method for performing desalination and eliminating boron from water and equipment for implementing said method
CN101521050A (en) * 2008-12-22 2009-09-02 中国广东核电集团有限公司 Method for connecting and controlling pipelines of boron recovery system during overhaul
CN101625908B (en) * 2009-07-22 2012-06-27 中国广东核电集团有限公司 Boron recovery system of nuclear power plant
EP2670712A4 (en) * 2011-01-31 2015-05-20 Avantech Inc Boron recovery treatment method
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