CN110322975A - A kind of passive starting method of nuclear reactor initial core - Google Patents
A kind of passive starting method of nuclear reactor initial core Download PDFInfo
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- CN110322975A CN110322975A CN201910499183.9A CN201910499183A CN110322975A CN 110322975 A CN110322975 A CN 110322975A CN 201910499183 A CN201910499183 A CN 201910499183A CN 110322975 A CN110322975 A CN 110322975A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/34—Control of nuclear reaction by utilisation of a primary neutron source
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The present invention provides a kind of passive starting method of nuclear reactor initial core, it includes the following steps: to be evenly arranged the fuel assembly that at least two burnups are crossed in nuclear reactor initial core periphery, and the fuel assembly crossed by least two burnups generates neutron in nuclear reactor initial core；Using the neutron count rate of the heap external source range detector measurement nuclear reactor initial core of nuclear reactor, judge whether neutron count rate is greater than or equal to setting value, when neutron count rate is greater than or equal to setting value, then determines that heap external source range detector works normally；When heap external source range detector works normally, whether judged in nuclear reactor initial core charging process using neutron count rate in subcritical；And realize that nuclear reactor starts using the neutron that the burnup of loading crosses fuel assembly generation.Method provided by the invention can charge and start without using neutron source, improve the economy of nuclear power plant.
Description
Technical field
The present invention relates to technical field of nuclear power more particularly to a kind of passive starting methods of nuclear reactor initial core.
Background technique
Nuclear reactor initial core is usually made of entire new components, and fresh fuel is also generated without radioactivity without spontaneous fission.
When entering reactor core from first component, in order to guarantee heap external source range detector measurement counting rate it is necessary >=requirement of 2c/s, it is existing
Technology is to place neutron source in first component of loading, and the neutron emitted by neutron source excites fresh fuel generation core to split
Become and generate neutron, to realize the neutron measurement of heap external source range detector, and according to decrement rate and fuel stack number of packages
Relation curve is to confirm the subcritical state of reactor core.Fig. 1 describes prior art 15*15 pressurized-water reactor nuclear power plant reactor
Core fuel assembly and starting neutron source arrangement schematic diagram.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of passive starting method of nuclear reactor initial core, it can not
It is charged and is started using neutron source, improve the economy of nuclear power plant.
A kind of passive starting method of nuclear reactor initial core provided by the invention comprising following step:
It is evenly arranged the fuel assembly that at least two burnups are crossed in nuclear reactor initial core periphery, passes through described at least two
The fuel assembly that a burnup is crossed generates neutron in the nuclear reactor initial core；
The neutron count rate of nuclear reactor initial core described in heap external source range detector measurement using nuclear reactor, sentences
Whether the neutron count rate that breaks is greater than or equal to setting value, when the neutron count rate is greater than or equal to the setting value,
Then determine that the heap external source range detector works normally；
When the heap external source range detector works normally, at the beginning of judging the nuclear reactor using the neutron count rate
Whether beginning reactor core is in charging process in subcritical and anti-using the neutron realization core that the burnup of loading crosses fuel assembly generation
Heap is answered to start.
Preferably, described that the fuel assembly that at least two burnups are crossed, tool are evenly arranged in nuclear reactor initial core periphery
Body are as follows:
The combustion that the fuel assembly or four burnups crossed in described two burnups of nuclear reactor initial core peripheral disposition are crossed
Component is expected, when the fuel assembly crossed in described two burnups of nuclear reactor initial core peripheral disposition, at the beginning of the nuclear reactor
It is symmetrical that the geometry of beginning reactor core meets half；When what is crossed in described four burnups of nuclear reactor initial core peripheral disposition
When fuel assembly, it is symmetrical that the geometry of the nuclear reactor initial core meets a quarter.
Preferably, further include following step:
When the fuel assembly that described two burnups of nuclear reactor initial core peripheral disposition are crossed, what described two burnups were crossed
The corresponding two heap external source range probe angles of the position of fuel assembly, to guarantee heap external source range explorer count,
Before the nuclear reactor initial core charging terminates, the fuel assembly that the two burnups are crossed is removed, then in the two burnup mistakes
The corresponding situ of fuel assembly be packed into the component of former design reactor core project arrangement.
Preferably, when the fuel assembly that described four burnups of nuclear reactor initial core peripheral disposition are crossed, in nuclear reaction
After heap starting, the fuel assembly for continuing to cross four burnups is as the fuel assembly of nuclear reactor.
Preferably, the fuel assembly that at least two burnup is crossed is sent out using residue fission and actinium series nucleic spontaneous fission
Son is hit, realizes nuclear reactor starting.
The invention has the following beneficial effects: method provided by the invention, the fuel assembly that can be crossed using burnup
Fission given-ioff neutron can charge and start without using neutron source, simplify and operate, improve the economy of nuclear power plant.
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 creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is pressurized-water reactor nuclear power plant reactor core fuel assembly provided by the invention and starting neutron source arrangement signal
Figure.
Fig. 2 is the flow chart of the passive starting method of nuclear reactor initial core provided by the invention.
Fig. 3 is nuclear reactor initial core novel fuel assembly provided by the invention and the fuel assembly arrangement signal that burnup is crossed
Figure one.
Fig. 4 is nuclear reactor initial core novel fuel assembly provided by the invention and the fuel assembly arrangement signal that burnup is crossed
Figure two.
Specific embodiment
The present invention provides a kind of passive starting method of nuclear reactor initial core, as shown in Fig. 2, this method includes following steps
It is rapid:
It is evenly arranged the fuel assembly that at least two burnups are crossed in nuclear reactor initial core periphery, passes through at least two combustions
The fuel assembly consumed generates neutron in nuclear reactor initial core；The fuel assembly that at least two burnup is crossed utilizes
Residue fission and actinium series nucleic spontaneous fission given-ioff neutron realize nuclear reactor starting.
Using the neutron count rate of the heap external source range detector measurement nuclear reactor initial core of nuclear reactor, in judgement
Whether sub-count rate is greater than or equal to setting value (such as the setting value can be 2c/s), sets when neutron count rate is greater than or equal to
When definite value, then determine that heap external source range detector works normally.Out-pile range detector is pre-set, in arrangement burnup
When the fuel assembly crossed, fuel stack that the fuel assembly that burnup is crossed can be crossed with out-pile range detector face or the burnup
Part can deviate some positions of out-pile range detector.
When heap external source range detector works normally, judge that nuclear reactor initial core is charging using neutron count rate
Whether it is in subcritical in the process, to guarantee the safety of nuclear reactor, and is crossed in fuel assembly generation using the burnup of loading
Son realizes nuclear reactor starting.
When the neutron count rate of out-pile range detector measurement is less than setting value, the then fuel assembly that adjustable burnup is crossed
Position and/or the fuel assembly that current burnup is crossed is substituted using the fuel assembly that other burnups are crossed so that out-pile range
The neutron count rate of detector measurement is greater than or equal to setting value, for example, the position for the fuel assembly that adjustable burnup is crossed, makes
It is closer apart from out-pile range detector.
Nuclear reactor initial core is usually made of entire new components, and the starting first step is that New Parent is packed into reactor core.To hundred
Ten thousand multikilowatt pressurized-water reactor nuclear power plants, during core loading, when reactor core geometry does not change, it is desirable that at least one heap
External source range detector must work normally, and counting rate it is necessary >=2c/s.When first component enters reactor core, it is necessary to horse
Upper measurement neutron count rate, and counting rate is measured always during entire core loading.Detector meter must be recorded
Digit rate, and draw decrement rate and the relation curve of fuel stack number of packages (is all made the counting rate in 5 Nuclear Instrument channels
Figure), to ensure that reactor core is in subcritical, judge whether reactor core is in subcritical and belongs to those skilled in the art according to neutron count rate
The common knowledge of member, is not described herein.It, must if reactor core geometry is constant, and when apparent variation has occurred in counting rate
Reason must be found out, to ensure the criticality safety of reactor core.
Further, it is evenly arranged the fuel assembly that at least two burnups are crossed in nuclear reactor initial core periphery, specifically
Are as follows:
The fuel stack that the fuel assembly or four burnups crossed in two burnups of nuclear reactor initial core peripheral disposition are crossed
Part, when the fuel assembly crossed in two burnups of nuclear reactor initial core peripheral disposition, the geometry of nuclear reactor initial core
Structure meets that half is symmetrical, and when the fuel assembly crossed in four burnups of nuclear reactor initial core peripheral disposition, core is anti-
The geometry of heap initial core is answered to meet a quarter symmetrical.Half is symmetrical, refers to the reactor core of nuclear reactor is second-class
Point, it is all identical between each equal part；A quarter is symmetrical, refers to the reactor core quartering of nuclear reactor, between each equal part all
It is identical.
Since initial core is usually made of entire new components, fuel stack is crossed in four burnups of initial core peripheral disposition
Part will change the design of initial core.In order to reduce on intrinsic influence, when in nuclear reactor initial core peripheral disposition four
When the fuel assembly that a burnup is crossed, burnup cross fuel assembly may be selected than original position fuel assembly initial enrichment be higher by it is more but
The component of one or two circulation burnup is lived through, remaining degree of enrichment and original position fuel assembly initial enrichment connect after burnup
Closely, two such component reactivity also close to, do not needed before core loading terminates yet the fuel assembly for crossing burnup removal, because
This changes original design reactor core scheme little.Fig. 3 describes 15*15 pressurized-water reactor nuclear power plant reactor core fresh fuel group of the present invention
The fuel assembly arrangement schematic diagram one that part and burnup are crossed.
When the fuel assembly that four burnups of nuclear reactor initial core peripheral disposition are crossed, after nuclear reactor starting,
Continue the fuel assembly for crossing this four burnups as the fuel assembly of nuclear reactor, the fuel assembly reaction that this four burnups are crossed
Property differed within 300pcm with the reactivity of the component of the former design reactor core project arrangement on its position.Due to initial heap
Core is usually made of entire new components, therefore is crossed fuel assembly in four groups of burnups of reactor core peripheral disposition and will be changed its initial designs.For
It reduces on intrinsic influence, the burnup of such as arrangement crosses fuel assembly and former design New Parent reactivity is close, sets to original
The influence for counting reactor core scheme will be smaller.
The passive starting method of nuclear reactor initial core further includes following step:
When the fuel assembly crossed in two burnups of nuclear reactor initial core peripheral disposition, fuel that the two burnups are crossed
The corresponding two heap external source range probe angles of the position of component, guarantee heap external source range explorer count in this way, in core
Before the charging of reactor initial core terminates, the fuel assembly that the two burnups are crossed is removed, then the fuel crossed in the two burnups
The corresponding situ of component is packed into the component of former design reactor core project arrangement.This embodiment is not related to former design reactor core side
Case changes.
Fuel assembly, the corresponding two heap external sources of position are crossed in two burnups of nuclear reactor initial core peripheral disposition
The angle of range detector, guarantee heap external source range detector measurement, which counts, in this way is greater than or equal to 2c/s.In this embodiment, only
It is initially introduced into the fuel assembly that the two burnups are crossed, during core loading to guarantee heap external source range detector measurement counting rate
It meets the requirements.The fuel assembly that charging crosses two burnups before terminating removes, and is reloaded into former design reactor core scheme position meter
Draw the component of arrangement.This embodiment is not related to former design reactor core scheme and changes.Fig. 4 describes 15*15 compressed water reactor nuclear power of the present invention
Stand reactor core novel fuel assembly and fuel assembly arrangement schematic diagram two that burnup is crossed.
Method provided by the invention can not use neutron using the fuel assembly fission given-ioff neutron that burnup is crossed
Source charging and starting, simplify operation, improve the economy of nuclear power plant.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (5)
1. a kind of passive starting method of nuclear reactor initial core, which is characterized in that include the following steps:
It is evenly arranged the fuel assembly that at least two burnups are crossed in nuclear reactor initial core periphery, is fired by described at least two
The fuel assembly consumed generates neutron in the nuclear reactor initial core；
The neutron count rate of nuclear reactor initial core described in heap external source range detector measurement using nuclear reactor, judges institute
It states whether neutron count rate is greater than or equal to setting value, when the neutron count rate is greater than or equal to the setting value, then sentences
The fixed heap external source range detector works normally；
When the heap external source range detector works normally, the initial heap of the nuclear reactor is judged using the neutron count rate
Whether core is in subcritical in charging process, and realizes nuclear reactor using the neutron that the burnup of loading crosses fuel assembly generation
Starting.
2. the passive starting method of nuclear reactor initial core according to claim 1, which is characterized in that described in nuclear reaction
Heap initial core periphery is evenly arranged the fuel assembly that at least two burnups are crossed, specifically:
The fuel stack that the fuel assembly or four burnups crossed in described two burnups of nuclear reactor initial core peripheral disposition are crossed
Part, when the fuel assembly crossed in described two burnups of nuclear reactor initial core peripheral disposition, the initial heap of nuclear reactor
It is symmetrical that the geometry of core meets half；When the fuel crossed in described four burnups of nuclear reactor initial core peripheral disposition
When component, it is symmetrical that the geometry of the nuclear reactor initial core meets a quarter.
3. the passive starting method of nuclear reactor initial core according to claim 2, which is characterized in that further include following steps
It is rapid:
When the fuel assembly that described two burnups of nuclear reactor initial core peripheral disposition are crossed, fuel that described two burnups are crossed
The corresponding two heap external source range probe angles of the position of component, to guarantee heap external source range explorer count, described
Before the charging of nuclear reactor initial core terminates, the fuel assembly that the two burnups are crossed is removed, then the combustion crossed in the two burnups
Expect that the corresponding situ of component is packed into the component of former design reactor core project arrangement.
4. the passive starting method of nuclear reactor initial core according to claim 2, which is characterized in that when the nuclear reaction
When the fuel assembly that four burnups of heap initial core peripheral disposition are crossed, after nuclear reactor starting, continue to fire described four
Fuel assembly of the fuel assembly consumed as nuclear reactor.
5. the passive starting method of nuclear reactor initial core according to claim 1, which is characterized in that described at least two
The fuel assembly that burnup is crossed realizes nuclear reactor starting using residue fission and actinium series nucleic spontaneous fission given-ioff neutron.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111312419A (en) * | 2020-03-27 | 2020-06-19 | 江苏核电有限公司 | Core loading method for pressurized water reactor primary reactor core without additional primary neutron source |
| CN112599268A (en) * | 2020-09-07 | 2021-04-02 | 中核核电运行管理有限公司 | Unloading method for replacing secondary neutron source component with central fuel component |
| CN115472321A (en) * | 2022-09-20 | 2022-12-13 | 中国核动力研究设计院 | Reactor core loading critical supervision method for first-cycle loading of low-fuel-consumption fuel assemblies |
| CN115831412A (en) * | 2022-11-30 | 2023-03-21 | 中国原子能科学研究院 | Method and system for charging reactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111312419A (en) * | 2020-03-27 | 2020-06-19 | 江苏核电有限公司 | Core loading method for pressurized water reactor primary reactor core without additional primary neutron source |
| CN111312419B (en) * | 2020-03-27 | 2021-12-14 | 江苏核电有限公司 | Core loading method for pressurized water reactor primary reactor core without additional primary neutron source |
| CN112599268A (en) * | 2020-09-07 | 2021-04-02 | 中核核电运行管理有限公司 | Unloading method for replacing secondary neutron source component with central fuel component |
| CN115472321A (en) * | 2022-09-20 | 2022-12-13 | 中国核动力研究设计院 | Reactor core loading critical supervision method for first-cycle loading of low-fuel-consumption fuel assemblies |
| CN115831412A (en) * | 2022-11-30 | 2023-03-21 | 中国原子能科学研究院 | Method and system for charging reactor |
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Application publication date: 20191011 |