CN110299215A - A kind of command bundle rods for nuclear reactors component - Google Patents
A kind of command bundle rods for nuclear reactors component Download PDFInfo
- Publication number
- CN110299215A CN110299215A CN201910597317.0A CN201910597317A CN110299215A CN 110299215 A CN110299215 A CN 110299215A CN 201910597317 A CN201910597317 A CN 201910597317A CN 110299215 A CN110299215 A CN 110299215A
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- Prior art keywords
- neutron
- absorber
- reactivity
- reactor
- nuclear
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Classifications
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- 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
-
- 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
- G21C7/10—Construction of control elements
-
- 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)
- 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 invention belongs to nuclear reactor reactivity control technology fields, more particularly to a kind of command bundle rods for nuclear reactors component, including the cylindrical control rod being arranged in cylindrical involucrum (7), the main body of control rod is made of neutron reflector (6), one side of neutron absorber (8) composition control rod, neutron reflector (6) is used to reflect fission neutron to reactor core, and then improve the reactivity of nuclear reactor, neutron absorber (8) is used to absorb the neutron of reactor core fission diffusion, and then reduces the reactivity of nuclear reactor.The command bundle rods for nuclear reactors component needs be only arranged at nuclear reactor periphery, without occupying active lattice, the reactivity and power of nuclear reactor are controlled in face of the angle of reactor core using its rotation and adjustment neutron absorber and neutron reflector, nuclear reactor starting, the functional requirement of power regulation and shutdown can be met, structure is simple, safe and reliable.
Description
Technical field
The invention belongs to nuclear reactor reactivity control technology fields, and in particular to a kind of command bundle rods for nuclear reactors component.
Background technique
C&P systems are nuclear reactor reactivity control units, the C&P systems used on nuclear power station at present be all by
It absorbs the very capable material of neutron to be made, utilizes the rate of its position control nuclear fission for being inserted into reactor core.In normal conditions,
They are for starting nuclear reactor, adjusting heap power and shutdown.Under accident conditions, under control rod relies on self gravity quick
It inserts, makes nuclear reactor emergency shut-down in a very short period of time, to guarantee nuclear reactor safety.
But many research nuclear reactor types in home and abroad are more and more, and core structure is extremely compact, and heap in-core removes fuel
It outside component, is only capable of that a small amount of C&P systems are arranged, for the starting and shutdown of nuclear reactor, and power regulation then relies on outside reactor core
Side component, such C&P systems structure is special, cannot be entirely the very strong material composition of neutron absorption capability, and existing maturation is answered
Requirement is not satisfied in C&P systems.
Summary of the invention
The object of the present invention is to provide a kind of C&P systems of nuclear reactor reactivity control, C&P systems arrangements
In reactor core periphery, neutron reflector and neutron absorber are wrapped in inside according to physical Design result using involucrum, it is normal to transport
When row, by its rotation, and then neutron absorber and neutron reflector are adjusted in face of the angle of reactor core to control reactivity, adjust core
Reactor capability, when shutdown, the quick spinning reduction of C&P systems, neutron absorber faces reactor core completely, realizes nuclear reactor
Close down.The C&P systems meet nuclear reactor starting, the functional requirement of power regulation and shutdown, and structure is simple, safe and reliable.
To achieve the above objectives, the technical solution adopted by the present invention is that a kind of command bundle rods for nuclear reactors component, wherein including
Cylindrical control rod in cylindrical involucrum is set, and the main body of the control rod is made of neutron reflector, and neutron is inhaled
Acceptor constitutes a side of control rod, and the neutron reflector is used to reflect fission neutron to the reactor core, and then improves institute
The reactivity of nuclear reactor is stated, the neutron absorber is used to absorb the neutron of the reactor core fission diffusion, and then described in reduction
The reactivity of nuclear reactor.
Further, the cross section of the neutron absorber is arc-shaped, the side of the neutron reflector be equipped with it is described
The adaptable cutting of neutron-absorbing shape, the neutron absorber are arranged in the one of the neutron reflector by the cutting
Side constitutes the cylindrical control rod together with the side of the neutron reflector.
Further, the neutron reflector is used for reflected neutron, and material includes beryllium or beryllium oxide；The neutron absorber is used
In absorbing neutron, material includes the boron carbide or silver-indium-cadmium alloy of the high degree of enrichment of boron 10.
Further, the C&P systems have negative reactivity and shutdown reactivity；The negative reactivity refers to when described
Nuclear reactor have maximum positive reactivity introduce when, can make the nuclear reactor enter under all operating conditions it is subcritical simultaneously
Maintain subcritical state；The shutdown reactivity refers to when the nuclear reactor is under all operating statuses and accident conditions,
The nuclear reactor can be made to enter subcritical, and maintain the subcritical state of enough shutdown depth.
Further, the top of the involucrum is equipped with upper end plug, and the bottom end of the involucrum is equipped with lower end plug.
Further, reflecting layer holddown spring is equipped between the upper end plug and the top of the neutron reflector, in institute
It states and is provided with absorber end holddown spring between the upper and lower ends of neutron absorber and the neutron reflector, in the neutron
Absorber side compression spring, the reflecting layer holddown spring and described are equipped between the two sides of absorber and the neutron reflector
Absorber end holddown spring and the absorber side compression spring are for compensating thermal expansion deformation and buffering vibration and impact.
Further, one clump weight is set in the outer surface of the upper end plug or the outer surface of the lower end plug, is used for
The center of gravity of the control rod is adapted on the axis of the control rod.
Further, the clump weight and the upper end plug or the lower end plug are integrally formed, or are welded in the upper end
On the outer surface of plug or the lower end plug.
Further, gas vent is set on the involucrum.
The beneficial effects of the present invention are:
The command bundle rods for nuclear reactors component needs be only arranged at nuclear reactor periphery, without occupying active lattice, utilizes
Its rotation and adjustment neutron absorber and neutron reflector control the reactivity and power of nuclear reactor in face of the angle of reactor core,
Nuclear reactor starting, the functional requirement of power regulation and shutdown can be met, structure is simple, safe and reliable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of command bundle rods for nuclear reactors component described in the specific embodiment of the invention；
Fig. 2 is the cross-sectional view of command bundle rods for nuclear reactors component described in the specific embodiment of the invention；
In figure: 1- clump weight, 2- upper end plug, the reflecting layer 3- holddown spring, 4- gas vent, 5- absorber end compress bullet
Spring, 6- neutron reflector, 7- involucrum, 8- neutron absorber, end plug under 9-, 10- absorber side compression spring.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, 2, a kind of command bundle rods for nuclear reactors component (hereinafter referred to as C&P systems) provided by the invention, packet
Include clump weight 1, upper end plug 2, reflecting layer holddown spring 3, absorber end holddown spring 5, neutron reflector 6, involucrum 7, neutron
The components such as absorber 8, lower end plug 9, absorber side compression spring 10.
Involucrum 7 is cylinder, and cylindrical control rod is arranged in inside, and the main body of control rod is made of neutron reflector 6, in
Sub- absorber 8 constitutes a side of control rod, and neutron reflector 6 is used to reflect fission neutron to reactor core, and then it is anti-to improve core
The reactivity of heap is answered, neutron absorber 8 is used to absorb the neutron of reactor core fission diffusion, and then reduces the reactivity of nuclear reactor.
The cross section of neutron absorber 8 is arc-shaped, and the side of neutron reflector 6 is equipped with and 8 shape phase of neutron absorber
The side of neutron reflector 6 is arranged in by cutting for the cutting of adaptation, neutron absorber 8, together with the side of neutron reflector 6
Constitute cylindrical control rod.
Neutron reflector 6 is used for reflected neutron, and material includes beryllium perhaps beryllium oxide or other suitable for neutron reflection
Functional material.For neutron absorber 8 for absorbing neutron, material includes the boron carbide or silver-indium-cadmium of the high degree of enrichment of boron 10
Alloy or other strong neutron absorber pellets.
Neutron reflector 6 and neutron absorber 8 inside C&P systems are changed according to physical Design and structure design
The calculated result in generation, C&P systems have enough negative reactivities and enough shutdown reactivities；Negative reactivity, which refers to, works as core
When there is reactor maximum positive reactivity to introduce, nuclear reactor can be made to enter under all operating conditions subcritical and maintained
Subcritical state；Shutdown reactivity refers to when nuclear reactor is under all operating statuses and accident conditions, can make nuclear reactor into
Enter subcritical state that is subcritical, and maintaining enough shutdown depth.
The top of involucrum 7 is arranged in upper end plug 2, and the bottom end of involucrum 7 is arranged in lower end plug 9.
Reflecting layer holddown spring 3 is arranged between upper end plug 2 and the top of neutron reflector 6, and absorber end compresses bullet
Spring 5 is arranged between the upper and lower ends of neutron absorber 8 and neutron reflector 6, and absorber side compression spring 10 is arranged in neutron
Between the two sides and neutron reflector 6 of absorber 8, reflecting layer holddown spring 3 and absorber end holddown spring 5 and side is absorbed
Holddown spring 10 is used to compensate nuclear reactor temperature when operating normally and increases the thermal expansion deformation generated and buffering installation, transport
Or vibration influence with impact to neutron reflector 6 and neutron absorber 8 of shutdown when quickly rotating.
The outer surface of upper end plug 2 or the outer surface (quantity is one) of lower end plug 9 is arranged in clump weight 1, for that will control
The center of gravity of stick processed is adapted on the axis of control rod.Neutron reflector 6 is different with the density of material of neutron absorber 8, and size is not
Together, it varying in weight, after assembling, center of gravity is inevitable eccentric, not in central axes, assembly positioning is influenced, according to eccentric moment calculated result,
One clump weight 1 is set in the outer end face of upper end plug 2 or lower end plug 9, guarantees the dynamic balancing of C&P systems.
Clump weight 1 and upper end plug 2 or lower end plug 9 are integrally formed, or are welded in the outer surface of upper end plug 2 or lower end plug 9
On.
Gas vent 4 is also set up on involucrum 7, when nuclear reactor operates normally, core temperature is gradually risen, and is controlled in drum component
Portion's gas expansion, air pressure increase, and gas vent 4 can avoid a possibility that involucrum 7 generates swelling or bursts.
A kind of practical application of command bundle rods for nuclear reactors component provided by the present invention is as follows:
Nuclear reactor starts preceding original state, and the neutron absorber 8 on control rod faces reactor core, nuclear reactor starting completely
When, C&P systems rotation is driven by the driving device of connection C&P systems, neutron absorber 8 slowly produces reactor core position,
And neutron reflector 6 is increasing in face of the volume of reactor core, is faced by constantly regulate neutron absorber 8 and neutron reflector 6
The position of reactor core, and then the watt level of nuclear reactor is adjusted, until nuclear reactor reaches critical full power.Nuclear reactor is normal
When shutdown or accident conditions emergency shut-down, kinetic energy is equally inputted by the driving device of connection C&P systems, makes C&P systems
Quickly rotation in a very short period of time, so that the neutron absorber 8 on control rod faces reactor core completely, nuclear reactor realization is closed down.
Device of the present invention is not limited to embodiment described in specific embodiment, those skilled in the art according to
Technical solution of the present invention obtains other embodiments, also belongs to the scope of the technical innovation of the present invention.
Claims (9)
1. a kind of command bundle rods for nuclear reactors component, it is characterized in that: including the cylindrical control being arranged in cylindrical involucrum (7)
The main body of stick processed, the control rod is made of neutron reflector (6), and neutron absorber (8) constitutes a side of control rod, institute
Neutron reflector (6) are stated for reflecting fission neutron to the reactor core, and then improve the reactivity of the nuclear reactor, it is described in
Sub- absorber (8) is used to absorb the neutron of the reactor core fission diffusion, and then reduces the reactivity of the nuclear reactor.
2. command bundle rods for nuclear reactors component as described in claim 1, it is characterized in that: the cross section of the neutron absorber (8)
For arc-shaped, the side of the neutron reflector (6) is equipped with the cutting being adapted with the neutron absorber (8) shape, described
Neutron absorber (8) is arranged by the cutting in the side of the neutron reflector (6), with the neutron reflector (6)
Side constitutes the cylindrical control rod together.
3. command bundle rods for nuclear reactors component as claimed in claim 2, it is characterized in that: the neutron reflector (6) is for reflecting
Neutron, material include beryllium or beryllium oxide；For the neutron absorber (8) for absorbing neutron, material includes the high degree of enrichment of boron 10
Boron carbide or silver-indium-cadmium alloy.
4. command bundle rods for nuclear reactors component as claimed in claim 3, it is characterized in that: the C&P systems have negative reactivity and
Shutdown reactivity, the negative reactivity refers to when there is the nuclear reactor maximum positive reactivity to introduce, and can make the core
Reactor enters subcritical under all operating conditions and maintains subcritical state；The shutdown reactivity refers to when the core
Reactor can be such that the nuclear reactor enters subcritical under all operating statuses and accident conditions, and maintained and stopped enough
The subcritical state of heap depth.
5. command bundle rods for nuclear reactors component as claimed in claim 2, it is characterized in that: the top of the involucrum (7) is equipped with upper end
It fills in (2), the bottom end of the involucrum (7) is equipped with lower end plug (9).
6. command bundle rods for nuclear reactors component as claimed in claim 4, it is characterized in that: in the upper end plug (2) and the neutron
Between the top in reflecting layer (6) be equipped with reflecting layer holddown spring (3), the neutron absorber (8) upper and lower ends with it is described
Absorber end holddown spring (5) is provided between neutron reflector (6), the neutron absorber (8) two sides with it is described
Absorber side compression spring (10), the reflecting layer holddown spring (3) and the absorption body end are equipped between neutron reflector (6)
Portion's holddown spring (5) and the absorber side compression spring (10) are for compensating thermal expansion deformation and buffering vibration and impact.
7. command bundle rods for nuclear reactors component as claimed in claim 3, it is characterized in that: the upper end plug (2) outer surface or
A clump weight (1) is arranged in the outer surface of lower end plug (9) described in person, for the center of gravity of the control rod to be adapted to the control
On the axis of stick.
8. command bundle rods for nuclear reactors component as claimed in claim 7, it is characterized in that: the clump weight (1) and the upper end plug
(2) or the lower end plug (9) is integrally formed, or is welded on the outer surface of the upper end plug (2) or the lower end plug (9).
9. command bundle rods for nuclear reactors component as described in claim 1, it is characterized in that: gas vent is arranged on the involucrum (7)
(4)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910597317.0A CN110299215A (en) | 2019-07-04 | 2019-07-04 | A kind of command bundle rods for nuclear reactors component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910597317.0A CN110299215A (en) | 2019-07-04 | 2019-07-04 | A kind of command bundle rods for nuclear reactors component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110299215A true CN110299215A (en) | 2019-10-01 |
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ID=68030267
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910597317.0A Pending CN110299215A (en) | 2019-07-04 | 2019-07-04 | A kind of command bundle rods for nuclear reactors component |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111161895A (en) * | 2020-01-02 | 2020-05-15 | 中国原子能科学研究院 | Support device for a nuclear reactor assembly and positioning method |
| CN111986823A (en) * | 2020-09-01 | 2020-11-24 | 中国原子能科学研究院 | Neutron reflection structure and reactor core assembly |
| CN113178268A (en) * | 2021-03-18 | 2021-07-27 | 中国核电工程有限公司 | Horizontal high-temperature-resistant multi-section control drum |
| CN113192657A (en) * | 2021-04-29 | 2021-07-30 | 西南科技大学 | Non-uniform control rod with reflecting layer |
| CN113241201A (en) * | 2021-04-29 | 2021-08-10 | 西南科技大学 | Non-uniform control rod with non-uniform reflecting layer |
| CN113782231A (en) * | 2021-08-30 | 2021-12-10 | 中国原子能科学研究院 | Control rod assembly and nuclear reactor |
| TWI816560B (en) * | 2022-09-26 | 2023-09-21 | 行政院原子能委員會核能研究所 | Design method of lattice enrichment of nuclear fuel bundle of boiling water reactor |
| WO2023184891A1 (en) * | 2022-03-31 | 2023-10-05 | 中广核研究院有限公司 | Control rod and control rod assembly |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111161895A (en) * | 2020-01-02 | 2020-05-15 | 中国原子能科学研究院 | Support device for a nuclear reactor assembly and positioning method |
| CN111986823A (en) * | 2020-09-01 | 2020-11-24 | 中国原子能科学研究院 | Neutron reflection structure and reactor core assembly |
| CN113178268A (en) * | 2021-03-18 | 2021-07-27 | 中国核电工程有限公司 | Horizontal high-temperature-resistant multi-section control drum |
| CN113178268B (en) * | 2021-03-18 | 2023-12-15 | 中国核电工程有限公司 | Horizontal high temperature resistant multisection formula control drum |
| CN113192657A (en) * | 2021-04-29 | 2021-07-30 | 西南科技大学 | Non-uniform control rod with reflecting layer |
| CN113241201A (en) * | 2021-04-29 | 2021-08-10 | 西南科技大学 | Non-uniform control rod with non-uniform reflecting layer |
| CN113241201B (en) * | 2021-04-29 | 2022-03-04 | 西南科技大学 | Non-uniform control rod with non-uniform reflecting layer |
| CN113192657B (en) * | 2021-04-29 | 2022-11-04 | 西南科技大学 | Non-uniform control rod with reflecting layer |
| CN113782231A (en) * | 2021-08-30 | 2021-12-10 | 中国原子能科学研究院 | Control rod assembly and nuclear reactor |
| CN113782231B (en) * | 2021-08-30 | 2024-05-31 | 中国原子能科学研究院 | Control rod assembly and nuclear reactor |
| WO2023184891A1 (en) * | 2022-03-31 | 2023-10-05 | 中广核研究院有限公司 | Control rod and control rod assembly |
| TWI816560B (en) * | 2022-09-26 | 2023-09-21 | 行政院原子能委員會核能研究所 | Design method of lattice enrichment of nuclear fuel bundle of boiling water reactor |
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Application publication date: 20191001 |