CN103400618A - Core asymmetric loading method for VVER nuclear power station reactor - Google Patents
Core asymmetric loading method for VVER nuclear power station reactor Download PDFInfo
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- CN103400618A CN103400618A CN2013102706838A CN201310270683A CN103400618A CN 103400618 A CN103400618 A CN 103400618A CN 2013102706838 A CN2013102706838 A CN 2013102706838A CN 201310270683 A CN201310270683 A CN 201310270683A CN 103400618 A CN103400618 A CN 103400618A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to reactor design technology, and more specifically relates to a core asymmetric loading method for a VVER nuclear power station reactor. In the situation that at least one group of fuel assembly is damaged, a new fuel assembly substitutes the damaged fuel assembly when a new cycle begins, and other fuel assemblies are maintained for usage; and the positions of the fuel assemblies are readjusted in the scope of the whole core to flatten distribution of the core power, so that quadrant power inclination of the core is maintained at a level for safe operation. The method provided by the invention can reduce nonuniform distribution of burnup in the assemblies, burnup of a discharging assembly fuel rod and the number of the newly inbuilt fuel assemblies, thereby increasing economical performance of the core.
Description
Technical field
The present invention relates to the reactor designing technique, be specifically related to the asymmetric stowage of a kind of VVER nuclear power station reactor core.
Background technology
The situation that there will be the assembly breakage in the reactor operation process,, in the situation that breakage component needs to change core loading in the original plan at next reactor core of also packing into that circulates, adopt New Parent replacement breakage component.For the VVER reactor core, conventional fuel management mode is to adopt 1/6 symmetric component to arrange, and requires fuel assembly to adjust position in 1/6 quadrant when packing reactor core into.
Reactor core has in the situation of 1 group fuel assembly breakage,, if adopt reactor core 1/6 to be arranged symmetrically with, needs the applicable components of other 5 positions of breakage component symmetry is also replaced, and does like this and causes reactor core economy variation.If only adopt 1 group of New Parent to replace damaged fuel assembly, to fuel assembly only in 1/6 quadrant position adjust, can't meet the Core Design criterion, as the power distribution etc.
Summary of the invention
The object of the invention is to the defect for prior art, provide a kind of VVER nuclear power station reactor core asymmetric stowage, thereby improve the economy of reactor core.
Technical scheme of the present invention is as follows: the asymmetric stowage of a kind of VVER nuclear power station reactor core, when at least one group fuel assembly occurs in damaged situation, when new circulation starts, adopt novel fuel assembly to replace damaged fuel assembly, the remaining fuel assembly continues to keep use, and readjust the position of fuel assembly in full reactor core scope, and flatten core power and distribute, make the reactor core quadrant power tilt remain on safety operation level.
Further, the asymmetric stowage of VVER nuclear power station reactor core as above, wherein, be placed on novel fuel assembly the position of close center element, reduces the asymmetry that core power distributes.
Further, the asymmetric stowage of VVER nuclear power station reactor core as above, wherein, adjust fuel assembly in six quadrants, makes the global reactivity of each quadrant fuel assembly approach.
Further, the asymmetric stowage of VVER nuclear power station reactor core as above, wherein, while readjusting the position of fuel assembly in full reactor core scope, part of fuel assembly in two relative 1/6 quadrant areas is exchanged, reduce discharge component rod burnup.
Beneficial effect of the present invention is as follows: the present invention is by adopting asymmetric core loading, and break the assembly traditional method that only position is adjusted in 1/6 zone, meet the requirement of only adopting novel fuel assembly to replace damaged fuel assembly, the calculating parameter of design reactor core meets the requirement of limiting design value, reduce the power quadrant, reduce burnup nonunf ormity in assembly, and reduce discharge component fuel rod burnup.In addition,, if adopt the only way of alternative breakage component, compare symmetric position and all replace, can also reduce the number of novel fuel assembly, thereby improve the reactor core economy.
Description of drawings
Fig. 1 is that VVER nuclear power station in the embodiment of the present invention (the 6th circulation of No. 1 unit of gulf, field nuclear power station) adopts asymmetric core loading scheme schematic diagram, and in figure, the darker assembly of color represents that burnup is larger.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
In the present embodiment, use No. 1 unit of gulf, field nuclear power station as description object, this method is introduced.Gulf, field nuclear power station is a kind of nuclear power station that adopts VVER heap type, and the 5th circulation of No. 1 unit of gulf, field nuclear power station has 1 group fuel assembly the impermeability forfeiture to occur, in the 6th circulation, adopts 1 group of novel fuel assembly to replace breakage component.In order to meet the requirement of Core Design limit value, reactor core adopts asymmetric stowage, and allows fuel assembly to adjust position in full reactor core scope.
The 6th circulation of No. 1 unit of gulf, field nuclear power station only adopts 1 group of novel fuel assembly to replace breakage component.The assembly of other 5 positions of breakage component symmetry is retained in the core loading of the 6th circulation like this, reduces the novel fuel assembly number of replacing, and has improved the economy of reactor core operation.Owing to only adopting 1 group of novel fuel assembly to replace breakage component, reactor core original 1/6 symmetrical loading pattern changes.
, for Core Design limit value and security, have the technology of following several respects to consider:
1., in order to reduce the impact of novel fuel assembly on the reactor core asymmetry, novel fuel assembly is placed on the position of close center element, the asymmetry that power can be distributed is confined in little zone.
2., for the reactor core security of operation, also require the reactor core quadrant power tilt keeping in certain limit.Therefore, need to adjust fuel assembly in six quadrants, make each quadrant fuel assembly global reactivity approach.For example, at the upper right of the New Parent of packing into 1/6 quadrant, because the novel fuel assembly reactivity is larger, reactive in order to flatten the reactor core quadrant, be respectively charged into reactivity in 98 and 111 positions and be 0.99 and 0.96 fuel assembly, and at other 5 symmetrical regions, the reactivity of packing into is respectively (0.99,1.03), (0.96,1.03), (0.96,1.03), the fuel assembly of (0.96,1.03) and (1.03,0.99).
3. adjust the position of fuel assembly in full reactor core scope, can reduce burnup nonunf ormity in assembly, thereby reduce discharge component rod burnup.If fuel assembly only moves in 1/6 reactor core, so will be greater than the excellent burnup away from reactor core center one side near the fuel rod burnup of reactor core center one side.Therefore, can exchange and reduce discharge component rod burnup by relative 1/6 regional fuel assembly.For example, the 157th position and the 7th place-exchange, the 102nd position and the 62nd place-exchange etc.
Asymmetric core loading mode is adopted in the 6th circulation of No. 1 unit of gulf, field nuclear power station, meet the requirement of only adopting 1 group of novel fuel assembly to replace breakage component, and result of calculation meets all limiting design value requirements.Final design proposal is referring to shown in accompanying drawing 1.
If have the situation of 2 groups of above fuel assembly breakages, also can distribute, reduce from the flattening core power aspect considerations such as reactor core quadrant inclination, the novel fuel assembly that as far as possible will replace is arranged symmetrically at reactor core, and other assemblies of corresponding adjustment, to meet the reactor core safety requirements.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and within modification belongs to the scope of the claims in the present invention and equivalent technology thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (4)
1. asymmetric stowage of VVER nuclear power station reactor core, it is characterized in that: when at least one group fuel assembly occurs in damaged situation, when new circulation starts, adopt novel fuel assembly to replace damaged fuel assembly, the remaining fuel assembly continues to keep use, and readjust the position of fuel assembly in full reactor core scope, and flatten core power and distribute, make the reactor core quadrant power tilt remain on safety operation level.
2. the asymmetric stowage of VVER nuclear power station reactor core as claimed in claim 1, is characterized in that: novel fuel assembly is placed on the position of close center element, reduces the asymmetry that core power distributes.
3. the asymmetric stowage of VVER nuclear power station reactor core as claimed in claim 1 or 2, is characterized in that: adjust fuel assembly in six quadrants, make the global reactivity of each quadrant fuel assembly approach.
4. the asymmetric stowage of VVER nuclear power station reactor core as claimed in claim 1 or 2, it is characterized in that: while readjusting the position of fuel assembly in full reactor core scope, part of fuel assembly in two relative 1/6 quadrant areas is exchanged, reduce discharge component rod burnup.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310270683.8A CN103400618B (en) | 2013-07-01 | 2013-07-01 | The asymmetric stowage of a kind of VVER nuclear power station reactor core |
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| CN201310270683.8A CN103400618B (en) | 2013-07-01 | 2013-07-01 | The asymmetric stowage of a kind of VVER nuclear power station reactor core |
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| CN103400618A true CN103400618A (en) | 2013-11-20 |
| CN103400618B CN103400618B (en) | 2016-04-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105917417A (en) * | 2013-11-21 | 2016-08-31 | 泰拉能源公司 | Method and system for generating a nuclear reactor core loading distribution |
| CN107977504A (en) * | 2017-11-28 | 2018-05-01 | 广东核电合营有限公司 | A kind of asymmetric in-core fuel management computational methods, device and terminal device |
| CN110134906A (en) * | 2019-03-06 | 2019-08-16 | 中国核电工程有限公司 | A kind of asymmetric lower reactor core DNBR calculation method of power distribution |
| CN111584107A (en) * | 2020-04-17 | 2020-08-25 | 岭东核电有限公司 | Recombination substitution method, device, equipment and storage medium for fuel unit of nuclear power station |
| CN114783631A (en) * | 2022-03-01 | 2022-07-22 | 中国核电工程有限公司 | Asymmetric loading method for reactor core of square component nuclear power station |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107545939A (en) * | 2017-07-11 | 2018-01-05 | 中国核电工程有限公司 | A kind of core loading method of long period balanced recycle after nuclear power station hoisting power |
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| CN1042620A (en) * | 1988-10-05 | 1990-05-30 | 英特阿托姆公司 | The discharger of ball fuel nuclear reactor fuel element |
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2013
- 2013-07-01 CN CN201310270683.8A patent/CN103400618B/en active Active
Patent Citations (5)
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| GB897449A (en) * | 1959-01-29 | 1962-05-30 | Atomic Energy Authority Uk | Improvements in or relating to refuelling machines for nuclear reactors |
| CN85101249A (en) * | 1985-04-01 | 1987-01-17 | 西屋电器公司 | From nuclear reactor pressure vessel, remove the instrument of split pin residue |
| CN87106875A (en) * | 1986-10-11 | 1988-06-15 | 于利希核研究有限公司 | From the ball heap, take out the method and apparatus of spherical combustion elements |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105917417A (en) * | 2013-11-21 | 2016-08-31 | 泰拉能源公司 | Method and system for generating a nuclear reactor core loading distribution |
| CN105917417B (en) * | 2013-11-21 | 2018-03-23 | 泰拉能源公司 | For generating the method and system of loading core of nuclear reactor distribution |
| CN107977504A (en) * | 2017-11-28 | 2018-05-01 | 广东核电合营有限公司 | A kind of asymmetric in-core fuel management computational methods, device and terminal device |
| CN107977504B (en) * | 2017-11-28 | 2021-03-16 | 广东核电合营有限公司 | Asymmetric reactor core fuel management calculation method and device and terminal equipment |
| CN110134906A (en) * | 2019-03-06 | 2019-08-16 | 中国核电工程有限公司 | A kind of asymmetric lower reactor core DNBR calculation method of power distribution |
| CN110134906B (en) * | 2019-03-06 | 2024-07-12 | 中国核电工程有限公司 | Reactor core DNBR calculation method under asymmetric power distribution |
| CN111584107A (en) * | 2020-04-17 | 2020-08-25 | 岭东核电有限公司 | Recombination substitution method, device, equipment and storage medium for fuel unit of nuclear power station |
| CN111584107B (en) * | 2020-04-17 | 2022-04-19 | 岭东核电有限公司 | Recombination substitution method, device, equipment and storage medium for fuel unit of nuclear power station |
| CN114783631A (en) * | 2022-03-01 | 2022-07-22 | 中国核电工程有限公司 | Asymmetric loading method for reactor core of square component nuclear power station |
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| Publication number | Publication date |
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| CN103400618B (en) | 2016-04-20 |
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