CN115171926A - Method for establishing reactor shutdown state based on control rod for heavy water reactor - Google Patents
Method for establishing reactor shutdown state based on control rod for heavy water reactor Download PDFInfo
- Publication number
- CN115171926A CN115171926A CN202210696665.5A CN202210696665A CN115171926A CN 115171926 A CN115171926 A CN 115171926A CN 202210696665 A CN202210696665 A CN 202210696665A CN 115171926 A CN115171926 A CN 115171926A
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- Prior art keywords
- reactor
- shutdown
- rod
- establishing
- power supply
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- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 239000002574 poison Substances 0.000 claims abstract description 13
- 231100000614 poison Toxicity 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 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 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/18—Means for obtaining differential movement of control elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear power control, and particularly relates to a method for establishing a reactor shutdown state guaranteed based on a control rod for a heavy water reactor. The method comprises the following steps: step 1: the power supply of the driving motor of the regulating rod is cut off; step 2: manually inserting the shutdown rod into the reactor core and locking the shutdown rod; and step 3: disconnecting a driving motor power supply and a clutch power supply of the shutdown rod; and 4, step 4: manually inserting and locking the mechanical absorption rod into the reactor core; and 5: disconnecting a driving motor power supply and a clutch power supply of the mechanical absorption rod; step 6: adding a poison to the moderator by a poison addition system; and 7: isolating the moderator purification system. The invention has the beneficial effects that: by establishing the method for guaranteeing the shutdown state based on the control rod, the problem that the RBGSS cannot be established by the traditional method of the power plant can be solved, the RBGSS is realized, and the reactor core is in a safe state.
Description
Technical Field
The invention belongs to the technical field of nuclear power control, and particularly relates to a method for establishing a reactor shutdown state guaranteed based on a control rod for a heavy water reactor.
Background
In the original design, the heavy water reactor nuclear power plant only has one method for entering a Guaranteed Shutdown State (GSS), namely, a high-concentration gadolinium nitrate solution is injected into a moderator to cause the moderator to be poisoned excessively, namely, over Poison GSS (OPGSS). However, under some accident conditions (such as moderator poison addition or sampling system failure, gadolinium nitrate precipitation or precipitation, etc.), the OPGSS cannot be implemented, and thus the reactor core cannot be in a safe state.
Aiming at the problem that the traditional method of the current power plant can not establish the RBGSS, a new method for establishing a reactor shutdown state guaranteed based on a control rod needs to be developed to realize the RBGSS.
Disclosure of Invention
The invention aims to provide a method for establishing a reactor shutdown state based on a control rod for a heavy water reactor, which solves the problem that the heavy water reactor has a single GSS entering mode for a long time and increases the flexibility of unit operation.
The technical scheme of the invention is as follows: a method for establishing a control rod-based reactor shutdown guarantee state of a heavy water reactor comprises the following steps:
step 1: disconnecting the power supply of the driving motor of the regulating rod;
and 2, step: manually inserting the shutdown rod into the reactor core and locking the shutdown rod;
and 3, step 3: disconnecting a driving motor power supply and a clutch power supply of the shutdown rod;
and 4, step 4: manually inserting and locking the mechanical absorption rod into the reactor core;
and 5: disconnecting a driving motor power supply and a clutch power supply of the mechanical absorption rod;
step 6: adding a poison to the moderator by a poison addition system;
and 7: isolating the moderator purification system.
The number of the adjusting rods in the step 1 is all 21.
The number of the shutdown rods in the step 2 is 28.
The number of the shutdown rods in the step 3 is 28.
The number of the mechanical absorption rods in the step 4 is 4.
The number of the mechanical absorption rods in the step 5 is 4.
The concentration of the poison in the step 6 is 2.5ppm.
The invention has the beneficial effects that: by establishing the control rod-based method for guaranteeing the shutdown state, the problem that the RBGSS cannot be established in the traditional method of the power plant can be solved, the RBGSS is realized, and the reactor core is in a safe state.
Drawings
FIG. 1 is a flow chart of a method for establishing a control rod-based reactor shutdown state of a heavy water reactor provided by the invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The rods are inserted into the core during normal reactor operation in order to flatten the reactor neutron flux distribution, or to compensate for xenon poisoning during reactor restart, or to provide backup reactivity for the reactor when online refueling is not possible. And the shutdown rods and the mechanical absorption rods are pulled out of the core, so that negative reactivity is provided for the core in an emergency.
When the RBGSS needs to be entered, the shutdown rods and the mechanical absorption rods are inserted into the reactor core, and the regulating rods, the shutdown rods and the mechanical absorption rods are locked in the reactor core and are powered off. To ensure sufficient shut-down depth, a quantity of poison needs to be added to the moderator by the poison addition system while the moderator cleanup system is isolated and RBGSS is established.
As shown in fig. 1, a method for establishing a control rod-based guaranteed shutdown state of a heavy water reactor comprises the following steps:
step 1: the power supply of the driving motors of all 21 regulating rods is cut off;
step 2: manually inserting all 28 shutdown rods into the reactor core and locking;
and 3, step 3: disconnecting the power supplies of the driving motors and the clutch of all 28 shutdown rods;
and 4, step 4: manually inserting all 4 mechanical absorption rods into the reactor core and locking the mechanical absorption rods;
and 5: disconnecting the drive motor power supply and the clutch power supply of all 4 mechanical absorption rods;
step 6: adding a poison with the concentration of 2.5ppm to the moderator through a poison addition system;
and 7: isolating the moderator purification system.
The reactor establishes RBGSS status.
Claims (7)
1. A method for establishing a control rod-based reactor shutdown guarantee state of a heavy water reactor is characterized by comprising the following steps:
step 1: the power supply of the driving motor of the regulating rod is cut off;
step 2: manually inserting the shutdown rod into the reactor core and locking the shutdown rod;
and step 3: disconnecting a driving motor power supply and a clutch power supply of the shutdown rod;
and 4, step 4: manually inserting and locking the mechanical absorption rod into the reactor core;
and 5: disconnecting a driving motor power supply and a clutch power supply of the mechanical absorption rod;
step 6: adding a poison to the moderator by a poison addition system;
and 7: isolating the moderator purification system.
2. A method of establishing a control-rod-based warranty shutdown condition for a heavy water reactor as defined in claim 1, wherein: the number of the adjusting rods in the step 1 is all 21.
3. The method for establishing a control rod-based guaranteed reactor shutdown for a heavy water reactor as claimed in claim 1, wherein: the number of the shutdown rods in the step 2 is 28.
4. The method for establishing a control rod-based guaranteed reactor shutdown for a heavy water reactor as claimed in claim 1, wherein: the number of the shutdown rods in the step 3 is 28.
5. The method for establishing a control rod-based guaranteed reactor shutdown for a heavy water reactor as claimed in claim 1, wherein: the number of the mechanical absorption rods in the step 4 is 4.
6. The method for establishing a control rod-based guaranteed reactor shutdown for a heavy water reactor as claimed in claim 1, wherein: the number of the mechanical absorption rods in the step 5 is 4.
7. The method for establishing a control rod-based guaranteed reactor shutdown for a heavy water reactor as claimed in claim 1, wherein: the concentration of the poison in the step 6 is 2.5ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210696665.5A CN115171926A (en) | 2022-06-20 | 2022-06-20 | Method for establishing reactor shutdown state based on control rod for heavy water reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210696665.5A CN115171926A (en) | 2022-06-20 | 2022-06-20 | Method for establishing reactor shutdown state based on control rod for heavy water reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115171926A true CN115171926A (en) | 2022-10-11 |
Family
ID=83485227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210696665.5A Pending CN115171926A (en) | 2022-06-20 | 2022-06-20 | Method for establishing reactor shutdown state based on control rod for heavy water reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115171926A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075789A1 (en) * | 2010-12-10 | 2012-06-14 | 中国广东核电集团有限公司 | Digitalized control system (dcs) of nuclear power unit, information processing method and device for dcs |
| CN103474098A (en) * | 2012-06-06 | 2013-12-25 | 中国核动力研究设计院 | Core using machinery control rod combination boron injection system as second reactor shutdown system |
| CN104332186A (en) * | 2013-07-22 | 2015-02-04 | 中国核动力研究设计院 | Reactor safe shutdown method |
| CN109215813A (en) * | 2018-09-13 | 2019-01-15 | 中国核动力研究设计院 | Pressurized-water reactor thimble tube complementary shutdown system and method |
| CN212809787U (en) * | 2020-07-20 | 2021-03-26 | 中国核动力研究设计院 | High-efficiency shutdown pebble-bed advanced high-temperature reactor core |
| CN112885492A (en) * | 2021-01-12 | 2021-06-01 | 中国原子能科学研究院 | Zero-power reactor experiment simulation device and method for simulating critical experiment |
| CN113161022A (en) * | 2021-04-29 | 2021-07-23 | 西安热工研究院有限公司 | Hydraulic suspension type reactor shutdown rod and working method thereof |
-
2022
- 2022-06-20 CN CN202210696665.5A patent/CN115171926A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012075789A1 (en) * | 2010-12-10 | 2012-06-14 | 中国广东核电集团有限公司 | Digitalized control system (dcs) of nuclear power unit, information processing method and device for dcs |
| CN103474098A (en) * | 2012-06-06 | 2013-12-25 | 中国核动力研究设计院 | Core using machinery control rod combination boron injection system as second reactor shutdown system |
| CN104332186A (en) * | 2013-07-22 | 2015-02-04 | 中国核动力研究设计院 | Reactor safe shutdown method |
| CN109215813A (en) * | 2018-09-13 | 2019-01-15 | 中国核动力研究设计院 | Pressurized-water reactor thimble tube complementary shutdown system and method |
| CN212809787U (en) * | 2020-07-20 | 2021-03-26 | 中国核动力研究设计院 | High-efficiency shutdown pebble-bed advanced high-temperature reactor core |
| CN112885492A (en) * | 2021-01-12 | 2021-06-01 | 中国原子能科学研究院 | Zero-power reactor experiment simulation device and method for simulating critical experiment |
| CN113161022A (en) * | 2021-04-29 | 2021-07-23 | 西安热工研究院有限公司 | Hydraulic suspension type reactor shutdown rod and working method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘忠国;王文聪;史星金;冯进军;: "秦山CANDU6重水堆应用RBGSS技术的可行性分析", 核科学与工程, no. 05, 15 October 2016 (2016-10-15), pages 590 - 594 * |
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