CN109545402A - A kind of method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant - Google Patents
A kind of method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant Download PDFInfo
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- CN109545402A CN109545402A CN201811273482.2A CN201811273482A CN109545402A CN 109545402 A CN109545402 A CN 109545402A CN 201811273482 A CN201811273482 A CN 201811273482A CN 109545402 A CN109545402 A CN 109545402A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/28—Selection of specific coolants ; Additions to the reactor coolants, e.g. against moderator corrosion
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
-
- 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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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention provides a kind of method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant, it is included in nuclear power station unit station startup stage, after the temperature of coolant to preset medium temperature threshold value, ammonium hydroxide is injected into primary Ioops, until the ammonia content of coolant reaches predetermined value, it is further continued for injection potassium hydroxide solution, until pH value=10；After nuclear power station unit station goes upward to the Operation at full power stage, the pH value of coolant is periodically detected, and when detecting pH value lower than 10, continuing to inject ammonium hydroxide and potassium hydroxide solution, the ammonia content until coolant maintains predetermined value and until pH value maintains 10；Ammonium hydroxide and potassium hydroxide are basifier, and ammonium hydroxide can decompose ammonification root and hydroxide ion in the unit starting stage, be illuminated in the Operation at full power stage and decomposite nitrogen and hydrogen, potassium hydroxide auxiliary adjustment pH.Implement the present invention, do not add boric acid, only plus ammonium hydroxide and potassium hydroxide, saves the preparation and carrying cost of boric acid and hydrogen.
Description
Technical field
A kind of water chemistry the present invention relates to nuclear safety technical field more particularly to nuclear power station based on no soluble boron coolant
The method that environment is adjusted.
Background technique
In one loop of nuclear power station coolant in the high temperature and pressure of major loop and high radiation field with cracking speed loop, no
Only while completing heat transmission function, the radioactive product that also reactor core is formed, the corrosion product especially activated moves to one
Each position in circuit, forms the radiation field outside reactor core.The coolant can be irradiated while degraded neutron and decomposite hydrogen
Gas and oxygen, and carried impurity can cause the corrosion of fuel can and structural material again.For that purpose it is necessary to be returned to nuclear power station one
Coolant is handled in road.
Currently, to the method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant, specifically by one
Potassium hydroxide is injected in the coolant of circuit as basifier and boric acid and adjusts pH value as reactive moderator is controlled, and is subtracted
Few corrosion to fuel can and structural material, meanwhile, also inhibit irradiation to decompose by injecting hydrogen into primary Ioops coolant
Carry out deoxygenation.But the equipment that the boric acid injected into primary Ioops coolant needs to establish preparation, storage, addition, recycling and filtering
And system, it not only causes process flow and device configuration extremely complex, also takes up space, increase input cost；Meanwhile to one time
The hydrogen injected in the coolant of road also needs setting preparation to increase industrial risk with the related system and equipment of storage.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of nuclear power station based on no soluble boron coolant
The method that chemical environment of water is adjusted, no longer addition boric acid are only added ammonium hydroxide and potassium hydroxide and are adjusted in primary Ioops as basifier
The pH value of coolant reduces the corrosion to fuel can and structural material, and using ammonium hydroxide electrolysis hydrogen ion come deoxygenation,
Save the preparation and carrying cost of boric acid and hydrogen.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of nuclear power stations based on no soluble boron coolant
The method that chemical environment of water is adjusted, the described method comprises the following steps:
In nuclear power station unit station startup stage, the temperature for obtaining coolant in one loop of nuclear power station is gradually risen to preset medium temperature threshold
After value, ammonium hydroxide is injected into primary Ioops by filling pipeline on preset on the reactor coolant loop RCS of nuclear power station, until one
Until the ammonia content of coolant reaches predetermined value in circuit, and further by the reactor coolant loop RCS of nuclear power station
It fills pipeline on preset to continue to inject potassium hydroxide solution into primary Ioops, until the pH value of coolant is equal to 10 in primary Ioops
Only；Wherein, coolant is free of boron ion and lithium ion before and after injection ammonium hydroxide and potassium hydroxide solution in the primary Ioops；Place
In the nuclear power station unit station startup stage ammonium hydroxide and potassium hydroxide as basifier, and ammonium hydroxide coolant in the primary Ioops
Ammonia radical ion and hydroxide ion are resolved into interior ionization；
After nuclear power station unit station goes upward to the Operation at full power stage, the pH value of coolant in primary Ioops is periodically detected,
And when detecting the pH value of coolant in primary Ioops lower than 10, pass through the reactor coolant loop RCS of nuclear power station
It is upper it is preset on fill pipeline and continue to inject ammonium hydroxide and potassium hydroxide solution into primary Ioops, until the ammonia of coolant contains in primary Ioops
Until amount maintains the predetermined value, and pH value can maintain 10；Wherein, it is in the nuclear power station unit station Operation at full power stage
Ammonium hydroxide be oxygen inhibitor, be illuminated the production for resolving into nitrogen and hydrogen to inhibit oxygen in coolant in the primary Ioops
It is raw.
Wherein, the method further includes:
The ammonia of coolant in primary Ioops is contained by probe tube preset on the reactor coolant loop RCS of nuclear power station every time
Amount and pH value are detected.
Wherein, coolant only includes desalination deoxygenation before nuclear power station unit station startup stage injects ammonium hydroxide in the primary Ioops
Water.
Wherein, the predetermined value is 6mg/l；The preset medium temperature threshold value is 80 DEG C.
Wherein, when the nuclear power station unit station Operation at full power stage, the temperature of coolant is increased in the primary Ioops
310℃。
The implementation of the embodiments of the present invention has the following beneficial effects:
1, in embodiments of the present invention, due in primary Ioops coolant do not add boric acid, thus be omitted the preparation of boric acid, storage
Deng saving cost and occupied space；
2, in embodiments of the present invention, due to the characteristic using ammonium hydroxide electrolysis ammonification radical ion and hydroxide ion, using ammonium hydroxide
The pH value of coolant in primary Ioops is adjusted as basifier with potassium hydroxide, to reduce to fuel can and structural material
Corrosion, while ammonium hydroxide being utilized to generate the characteristic of nitrogen and hydrogen under Elevated temperature irradiation, pressed down using ammonium hydroxide as oxygen inhibitor
In primary Ioops processed in coolant oxygen generation, save the preparation and carrying cost of hydrogen；
3, it in embodiments of the present invention, due to will not adjust boric acid concentration as the means of reactivity control, can remove
Introduced by boric acid positive reactivity temperature coefficient (the reactive temperature effect of nuclear power station be it is negative, i.e., increase can spontaneously for temperature
Cause reactive reduction), so that further increasing for temperature is controlled, it is more advantageous to safety.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without any creative labor, according to
These attached drawings obtain other attached drawings and still fall within scope of the invention.
Fig. 1 is the method that nuclear power station provided in an embodiment of the present invention is adjusted based on the chemical environment of water of no soluble boron coolant
Flow chart.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
As shown in Figure 1, for water chemistry of a kind of nuclear power station based on no soluble boron coolant in the embodiment of the present invention, provided
The method that environment is adjusted, the described method comprises the following steps:
Step S1, in nuclear power station unit station startup stage, the temperature for obtaining coolant in one loop of nuclear power station is gradually risen to default
Medium temperature threshold value after, ammonia is injected into primary Ioops by filling pipeline on preset on the reactor coolant loop RCS of nuclear power station
Water until the ammonia content of coolant in primary Ioops reaches predetermined value, and further passes through the reactor coolant of nuclear power station
On system RCS it is preset on fill pipeline and continue to inject potassium hydroxide solution into primary Ioops, until in primary Ioops coolant pH
Until value is equal to 10；Wherein, coolant is free of boron ion before and after injection ammonium hydroxide and potassium hydroxide solution in the primary Ioops
And lithium ion；Ammonium hydroxide and potassium hydroxide in the nuclear power station unit station startup stage are as basifier, and ammonium hydroxide is described one
Ammonia radical ion and hydroxide ion are resolved into ionization in coolant in circuit；
Step S2, after nuclear power station unit station goes upward to the Operation at full power stage, is carried out to the pH value of coolant in primary Ioops the period
Property detection, and once detect coolant in primary Ioops pH value be lower than 10 when, pass through the reactor coolant of nuclear power station
On system RCS it is preset on fill pipeline and continue to inject ammonium hydroxide and potassium hydroxide solution into primary Ioops, until cooling in primary Ioops
Until the ammonia content of agent maintains the predetermined value, and pH value can maintain 10；Wherein.In the nuclear power station unit station full power
The ammonium hydroxide of operation phase is oxygen inhibitor, is illuminated and resolves into nitrogen and hydrogen to inhibit in the primary Ioops oxygen in coolant
The generation of gas.
Detailed process is, before step S1, i.e., before nuclear power station unit station starting, should configure coolant in primary Ioops,
And the coolant is free of boron ion and lithium ion.Wherein, coolant only includes desalination deaerated water.
In step sl, i.e., after nuclear power station unit station starting, the temperature of coolant is with nuclear power station unit station in one loop of nuclear power station
Temperature raising also gradually rises.The temperature to be checked for measuring coolant in primary Ioops reach preset medium temperature threshold value (such as 80 DEG C or its
Its temperature) after, ammonium hydroxide is injected into primary Ioops by filling pipeline on preset on RCS, until the ammonia of coolant contains in primary Ioops
Until amount reaches predetermined value, ammonium hydroxide is as basifier at this time, and ammonia radical ion and hydrogen are resolved into ionization in coolant in primary Ioops
Oxygen radical ion.In order to promote the alkaline environment of coolant in primary Ioops, impurity carried by coolant is to combustion in reduction primary Ioops
The corrosion for expecting involucrum and structural material fills pipeline to inject potassium hydroxide solution into primary Ioops (complementary by preset on RCS
Promote pH value alkalinity), until the pH value of coolant in primary Ioops is equal to 10, potassium hydroxide is used as auxiliary basifier at this time,
To adjust the pH value of coolant in primary Ioops.
At this point, the predetermined value of ammonia content is to be rationally designed out by the machine set type of different nuclear power station, and be somebody's turn to do
Predetermined value is also the nuclear power station Operation at full power stage, and when pH value=10 remain unchanged, the fixation designed according to actual needs
Value.In one embodiment, predetermined value 6mg/l, the predetermined value are obtained according to the actual motion environment of small-sized presurized water reactor.
In step s 2, in primary Ioops the ammonia content of coolant because of nuclear power station unit station uplink, and go upward to full power fortune
Row order section changes due to high temperature and irradiation are broken down into nitrogen and hydrogen, need to pass through setting detection cycle and to primary Ioops
The pH value and ammonia content of middle coolant are periodically detected.Wherein, when the nuclear power station unit station Operation at full power stage, in primary Ioops
The temperature of coolant can be increased to 310 DEG C or other high temperature for being greater than 310 DEG C.
In detection process each time, when detecting the pH value of coolant in primary Ioops lower than 10, RCS will be passed through
The upper preset pipeline that fills continues to inject ammonium hydroxide and potassium hydroxide solution into primary Ioops, up to the ammonia content of coolant in primary Ioops
Until constant is predetermined value (6mg/l of such as small-sized presurized water reactor design), and pH value=10 remain unchanged, ammonium hydroxide can be made again in this way
As oxygen inhibitor, inhibit the generation of oxygen in coolant in primary Ioops by being illuminated the hydrogen resolved into, simultaneously also
It can ensure that coolant is constantly in alkaline environment in primary Ioops, reduces the corrosion to fuel can and structural material.
It should be noted that the stage of nuclear power station unit station uplink and not up to Operation at full power, it may not be necessary to one time
Ammonium hydroxide and potassium hydroxide solution are injected in road.
It should be noted that the pH value of coolant and being periodically detected for ammonia content can be according to actual needs in primary Ioops
Time setting at equal intervals or the setting of unequal interval time are carried out, while the starting point of cycle detection can be nuclear power station unit station uplink simultaneously
Just when arrival to Operation at full power state, after being also possible to nuclear power station unit station Operation at full power for a period of time.Meanwhile in primary Ioops
Coolant is under all operating statuses of nuclear power station unit station, until beginning all be free of boron ion and lithium ion to whole.
In embodiments of the present invention, regardless of what stage the operation of nuclear power station unit station is located at, then coolant in primary Ioops
Ammonia content and pH value are detected after being sampled by probe tube preset on RCS every time.
To sum up, the method that the nuclear power station of the embodiment of the present invention is adjusted based on the chemical environment of water of no soluble boron coolant, it is first
It first need to only carry out 1 grade of Chemical Control to adjust, i.e., the pH of coolant in primary Ioops directly be maintained 10, can completed to primary Ioops
The stability contorting of coolant pH；Secondly as using no soluble boron coolant, within the nuclear power station entire phase in longevity, in primary Ioops not
Boric acid is added, preparation, storage of boric acid etc. is omitted, saves cost and occupied space；Finally, because of coolant in primary Ioops
PH maintains 10, allows primary Ioops part-structure material using carbon steel, cost-saved.
The implementation of the embodiments of the present invention has the following beneficial effects:
1, in embodiments of the present invention, due in primary Ioops coolant do not add boric acid, thus be omitted the preparation of boric acid, storage
Deng saving cost and occupied space；
2, in embodiments of the present invention, due to the characteristic using ammonium hydroxide electrolysis ammonification radical ion and hydroxide ion, using ammonium hydroxide
The pH value of coolant in primary Ioops is adjusted as basifier with potassium hydroxide, to reduce to fuel can and structural material
Corrosion, while ammonium hydroxide being utilized to generate the characteristic of nitrogen and hydrogen under Elevated temperature irradiation, pressed down using ammonium hydroxide as oxygen inhibitor
In primary Ioops processed in coolant oxygen generation, save the preparation and carrying cost of hydrogen；
3, it in embodiments of the present invention, due to will not adjust boric acid concentration as the means of reactivity control, can remove
Introduced by boric acid positive reactivity temperature coefficient (the reactive temperature effect of nuclear power station be it is negative, i.e., increase can spontaneously for temperature
Cause reactive reduction), so that further increasing for temperature is controlled, it is more advantageous to safety.
Those of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, the program can be stored in a computer readable storage medium,
The storage medium, such as ROM/RAM, disk, CD.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (5)
1. a kind of method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant, which is characterized in that the method
The following steps are included:
In nuclear power station unit station startup stage, the temperature for obtaining coolant in one loop of nuclear power station is gradually risen to preset medium temperature threshold
After value, ammonium hydroxide is injected into primary Ioops by filling pipeline on preset on the reactor coolant loop RCS of nuclear power station, until one
Until the ammonia content of coolant reaches predetermined value in circuit, and further by the reactor coolant loop RCS of nuclear power station
It fills pipeline on preset to continue to inject potassium hydroxide solution into primary Ioops, until the pH value of coolant is equal to 10 in primary Ioops
Only；Wherein, coolant is free of boron ion and lithium ion before and after injection ammonium hydroxide and potassium hydroxide solution in the primary Ioops；Place
In the nuclear power station unit station startup stage ammonium hydroxide and potassium hydroxide as basifier, and ammonium hydroxide coolant in the primary Ioops
Ammonia radical ion and hydroxide ion are resolved into interior ionization；
After nuclear power station unit station goes upward to the Operation at full power stage, the pH value of coolant in primary Ioops is periodically detected,
And when detecting the pH value of coolant in primary Ioops lower than 10, pass through the reactor coolant loop RCS of nuclear power station
It is upper it is preset on fill pipeline and continue to inject ammonium hydroxide and potassium hydroxide solution into primary Ioops, until the ammonia of coolant contains in primary Ioops
Until amount maintains the predetermined value, and pH value can maintain 10；Wherein；
Ammonium hydroxide in the nuclear power station unit station Operation at full power stage is oxygen inhibitor, is illuminated and resolves into nitrogen and hydrogen
To inhibit the generation of oxygen in coolant in the primary Ioops.
2. the method that nuclear power station as described in claim 1 is adjusted based on the chemical environment of water of no soluble boron coolant, feature
It is, the method further includes:
The ammonia of coolant in primary Ioops is contained by probe tube preset on the reactor coolant loop RCS of nuclear power station every time
Amount and pH value are detected.
3. the method that nuclear power station as described in claim 1 is adjusted based on the chemical environment of water of no soluble boron coolant, feature
It is, coolant only includes desalination deaerated water before nuclear power station unit station startup stage injects ammonium hydroxide in the primary Ioops.
4. the method that nuclear power station as described in claim 1 is adjusted based on the chemical environment of water of no soluble boron coolant, feature
It is, the predetermined value is 6mg/l；The preset medium temperature threshold value is 80 DEG C.
5. the method that nuclear power station as described in claim 1 is adjusted based on the chemical environment of water of no soluble boron coolant, feature
It is, when the nuclear power station unit station Operation at full power stage, the temperature of coolant is increased to 310 DEG C in the primary Ioops.
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| CN201811273482.2A CN109545402A (en) | 2018-10-30 | 2018-10-30 | A kind of method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant |
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| CN201811273482.2A CN109545402A (en) | 2018-10-30 | 2018-10-30 | A kind of method that nuclear power station is adjusted based on the chemical environment of water of no soluble boron coolant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110136858A (en) * | 2019-04-25 | 2019-08-16 | 中国船舶重工集团公司第七一九研究所 | Suitable for small-sized heap without boron list lithium alkalescent water quality adjusting system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110136858A (en) * | 2019-04-25 | 2019-08-16 | 中国船舶重工集团公司第七一九研究所 | Suitable for small-sized heap without boron list lithium alkalescent water quality adjusting system and method |
| CN110136858B (en) * | 2019-04-25 | 2022-11-01 | 中国船舶重工集团公司第七一九研究所 | Boron-free single-lithium alkalescent water quality adjusting system and method suitable for small-sized reactor |
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