CN112489826A - Pool type shielding device for small-sized reactor - Google Patents
Pool type shielding device for small-sized reactor Download PDFInfo
- Publication number
- CN112489826A CN112489826A CN202011352228.9A CN202011352228A CN112489826A CN 112489826 A CN112489826 A CN 112489826A CN 202011352228 A CN202011352228 A CN 202011352228A CN 112489826 A CN112489826 A CN 112489826A
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- Prior art keywords
- shielding
- pool
- shield
- small
- stack
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/02—Biological shielding ; Neutron or gamma shielding
- G21C11/022—Biological shielding ; Neutron or gamma shielding inside the reactor vessel
- G21C11/024—Biological shielding ; Neutron or gamma shielding inside the reactor vessel structurally combined with the casing
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/02—Biological shielding ; Neutron or gamma shielding
-
- 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
Abstract
The invention discloses a pool type shielding device for a small-sized reactor, which is used for shielding neutrons emitted or scattered from a container and comprises: the shielding water pool is internally provided with an accommodating cavity for accommodating the small-scale reactor pressure vessel, and the accommodating cavity is formed by enclosing an inner side wall; the opening end of the accommodating cavity is provided with a filling shielding layer, and the filling shielding layer is filled in a gap between the outer wall of the pressure vessel for mounting the small reactor and the inner wall of the opening end of the accommodating cavity; establish the high temperature resistant shielding piece at shielding pond top, high temperature resistant shielding piece encloses the periphery that keeps off the part more than small-size pressure vessel is located the shielding pond, and high temperature resistant shielding piece is in succession with the filling shielding layer. The pool type shielding device for the small reactor can solve the problem of neutron beam leakage in a reactor shielding structure; reduced weight and reduced cost.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a pool type shielding device for a small-sized reactor.
Background
In the prior art, a commercial pressurized water reactor nuclear power station mainly depends on a concrete shielding layer to realize shielding of a nuclear reactor, and the irradiation dose of workers is reduced by reducing equipment activation outside shielding strength. The technical problems of the structure are as follows: due to the performance limitation of concrete, an insulating layer is required to be arranged between the shielding wall and the reactor pressure vessel to limit the temperature of the inner surface of the concrete. Therefore, a row of installation spaces and ventilation spaces are reserved between the RPV and the concrete shielding member, which results in an excessively large gap between the RPV and the concrete shielding member, and neutrons in the reactor core leak to the reactor plant area through the gap, thereby affecting the radiation safety of equipment and workers. And the shielding pressure of the reactor plant is greatly increased, and extra shielding weight and cost requirements are brought.
Although the more efficient molten iron shielding or other mixed structure shielding is adopted to replace concrete wall shielding in the marine pile, certain technical problems still exist due to the fact that reasonable structural design does not exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pool type shielding device for a small reactor, which can solve the problem of neutron beam leakage in a reactor shielding structure; reduced weight and reduced cost.
In order to solve the above technical problem, an embodiment of the present invention provides a pool shielding apparatus for a small stack to shield neutrons emitted or scattered from a container, including: the shielding water pool is internally provided with an accommodating cavity for accommodating the small-scale reactor pressure vessel, and the accommodating cavity is formed by enclosing an inner side wall; the opening end of the accommodating cavity is provided with a filling shielding layer, and the filling shielding layer is filled in a gap between the outer wall of the pressure vessel for mounting the small reactor and the inner wall of the opening end of the accommodating cavity; establish the high temperature resistant shielding piece at shielding pond top, high temperature resistant shielding piece encloses the periphery that keeps off the part more than small-size pressure vessel is located the shielding pond, and high temperature resistant shielding piece is in succession with the filling shielding layer.
Wherein, still include: the top shielding layer is arranged at the top of the shielding pool, the lateral shielding layer is arranged on the outer side wall of the shielding pool, and the bottom shielding layer is arranged at the bottom of the shielding pool; the top shielding layer, the lateral shielding layer and the bottom shielding layer shield gamma of the reactor core and secondary gamma generated after neutron shielding, and the top shielding layer is connected with the high-temperature-resistant shielding block.
Wherein, the top shield layer, the lateral shield layer and the bottom shield layer are made of lead and/or stainless steel materials.
Wherein, the upper surface of the core reactor active section in the small reactor pressure vessel is lower than the water surface of the shielding water pool.
The section of the high-temperature resistant shielding block is annular, and the inner wall of the through hole in the middle of the high-temperature resistant shielding block is tightly attached to the outer wall of the small-sized reactor pressure vessel.
Wherein, the high temperature resistant shielding block is made of any one of steel, graphite, boron carbide and boron steel.
Wherein the top of the shielding water pool is sealed by the high-temperature resistant shielding block and the top shielding layer.
Wherein, still include: and the cooling and purifying device is communicated with the shielding water tank through a water drainage pipe and a water inlet pipe respectively.
Wherein the drain pipe and the water inlet pipe penetrate through the lateral shielding layer.
The pool type shielding device for the small-sized pile provided by the invention has the following beneficial effects: the pool type shielding device for the small-sized reactor comprises a shielding water pool, wherein an accommodating cavity for accommodating the pressure container of the small-sized reactor is arranged in the shielding water pool, and the accommodating cavity is formed by enclosing an inner side wall; the opening end of the accommodating cavity is provided with a filling shielding layer, and the filling shielding layer is filled in a gap between the outer wall of the pressure vessel for mounting the small reactor and the inner wall of the opening end of the accommodating cavity; the high-temperature-resistant shielding block is arranged at the top of the shielding water pool, the high-temperature-resistant shielding block is enclosed and blocked at the periphery of the part, above the shielding water pool, of the small reactor pressure vessel, and the high-temperature-resistant shielding block is connected with the filling shielding layer, so that the problem of neutron beam leakage in a reactor shielding structure can be solved; reduced weight and reduced cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view showing the overall structure of a pool type shielding apparatus for a small-sized pile according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, there is shown a first embodiment of the pool shield apparatus of the present invention for use in a mini-stack.
The pool type shielding device for the small reactor in the embodiment is mainly applied to shielding of a small nuclear reactor for a ship, and has the following main functions: the gamma radiation from the neutron leak bundle of the reactor core and the primary main equipment is gradually reduced.
Pool shielding for a mini-stack comprising: the device comprises a shielding water pool 1, wherein an accommodating cavity 10 for accommodating a small-sized reactor pressure container T is arranged in the shielding water pool 1, and the accommodating cavity 10 is surrounded and blocked by an inner side 1a wall; the open end 101 of the accommodating cavity 10 is provided with a filling shielding layer 2, and the filling shielding layer 2 is filled in a space S between the outer wall of the small-sized reactor pressure container T and the inner wall of the open end 101 of the accommodating cavity; establish the high temperature resistant shielding piece 3 at 1 top in shielding pond, high temperature resistant shielding piece 3 encloses the periphery that keeps off the part above 1 pool face A in shielding pond at small-size heap pressure vessel T, and high temperature resistant shielding piece 3 is in succession with filling shielding layer 2.
In specific implementation, the shielding water tank 1 is a facility which is formed by enclosing a bottom wall by side walls and can perform water injection, water drainage and water storage. The containing cavity 10 is located at the middle part, the shape and size of the containing cavity 10 can be adjusted according to the shape of the small stack pressure container T to be placed, the middle part and the bottom part of the small stack pressure container T are placed in the containing cavity 10, but the structure is still partial, for example, the top part of the small stack pressure container T is placed outside the containing cavity 10.
The small reactor pressure vessel T is placed in the accommodating cavity 10, so that water in the shielding water pool 1 can shield the small reactor pressure vessel T and neutrons generated from a reactor core therein. The technical requirements in implementation are as follows: the upper surface T1 of the active core segment in the small reactor pressure vessel T is lower than the pool surface a of the shield pool 1. Therefore, the shielding water tank 1 shields the T part of the small reactor pressure vessel and the active section of the reactor core, and the water in the shielding water tank 1 can effectively shield the neutrons of the reactor core.
Further, other shielding structures are respectively arranged on the side wall and the bottom wall of the shielding pool 1, so that the whole device forms a layered shielding layout, specifically, a lateral shielding layer 1b is also arranged on the outer side wall of the shielding pool 1, a bottom shielding layer 1c is arranged on the bottom wall of the shielding pool 1, a top shielding layer 1d is also arranged on the top of the shielding pool 1,
the top shielding layer 1d, the lateral shielding layer 1b and the bottom shielding layer 1c are arranged to function as: and shielding the gamma of the reactor core and the secondary gamma generated after the neutron shielding. The neutron leakage beam from the reactor core and the gamma radiation of the primary circuit main equipment are gradually reduced, so that a layered shielding layout is formed by matching the filling shielding layer 2 and the high-temperature-resistant shielding block 3, and the shielding layout has the advantages of small occupied space, low weight and the like on the whole.
Preferably, the top shielding layer 1d is connected with the high-temperature resistant shielding block 2 to seal the pool surface A of the shielding pool 1.
Preferably, the top shield layer 1d, the side shield layer 1b, and the bottom shield layer 1c are made of lead and/or stainless material so as to shield the core from gamma and secondary gamma generated by neutron shielding.
Further, the small-sized stack pressure container T is not completely arranged in the accommodating cavity 10, so that a space S exists between the outer wall of the small-sized stack pressure container T and the inner wall of the accommodating cavity. This application is filling shielding layer 2 in the interval S department between the inner wall of holding chamber open end 101 and small-size pressure vessel T' S outer wall, and its effect is: preventing neutrons from leaking out of the beam.
The filling shielding layer 2 is made of materials such as steel, graphite, boron carbide or boron steel, and neutron beam leakage is prevented.
Further, high temperature resistant shielding piece 3 sets up more than the pool face A in shielding pond 1, and high temperature resistant shielding piece 3 encloses the periphery that keeps off and is located 1 above the pool face A in shielding pond at small-size heap pressure vessel T, and high temperature resistant shielding piece 3 is in succession with filling shielding layer 2.
In specific implementation, the section of the high-temperature resistant shielding block 3 is annular, and the inner wall of the middle through hole is tightly attached to the outer wall of the small-sized reactor pressure vessel T. The high temperature resistant shielding block 3 and the top shielding layer 1d seal the pool surface A of the shielding pool 1.
The high-temperature resistant shielding block 3 has the following functions: through setting up to be massive high temperature resistant shielding block 3 for the heat preservation that sets up in the traditional structure can be cancelled to small-size pressure vessel's of piling shield assembly, thereby reaches weight reduction, makes the purpose more sparingly space.
Preferably, the high temperature resistant shielding block 3 is made of any one of steel, graphite, boron carbide and boron steel.
Further, the pool shield apparatus for a small stack in the present embodiment further includes: and the cooling and purifying device 41 is communicated with the shielded water pool 1 through a water outlet pipe 42 and a water inlet pipe 43 respectively. The drain pipe 42 and the inlet pipe 43 pass through the side shield layer 1 b. So in order to practice thrift the space, be convenient for arrange, reduce the influence to other shielding structure installation construction.
In the concrete implementation of the pool type shielding device for the small reactor in the embodiment, the filling shielding layer 2, the high temperature resistant shielding block 3, the top shielding layer 1d, the side shielding layer 1b and the bottom shielding layer 1c are arranged to form a shielding structure above and around the shielding pool 1, so that the hierarchical layout is realized, and the neutron leakage beams from the reactor core and the gamma radiation of the primary equipment of the primary circuit are gradually reduced. In addition, the problem of high irradiation identification dose of equipment at the outer side of the primary shielding of the reactor and the problem of dose of workers at the outer side of the primary shielding of the reactor after the shutdown working condition can be solved.
The pool type shielding device for the small-sized reactor comprises a shielding pool, wherein an accommodating cavity for accommodating a pressure container of the small-sized reactor is arranged in the shielding pool, and the accommodating cavity is formed by enclosing an inner side wall; the opening end of the accommodating cavity is provided with a filling shielding layer, and the filling shielding layer is filled in a gap between the outer wall of the pressure vessel for mounting the small reactor and the inner wall of the opening end of the accommodating cavity; the high-temperature-resistant shielding block is arranged at the top of the shielding water pool, the high-temperature-resistant shielding block is enclosed and blocked at the periphery of the part, above the shielding water pool, of the small reactor pressure vessel, and the high-temperature-resistant shielding block is connected with the filling shielding layer, so that the problem of neutron beam leakage in a reactor shielding structure can be solved; the weight and the cost are reduced, the space is saved, and the overall economy is high.
Claims (9)
1. A pool shield for a mini-stack for shielding neutrons emitted or scattered from within a container, comprising:
the device comprises a shielding water pool, a water tank and a water tank, wherein an accommodating cavity for accommodating a small-sized reactor pressure container is arranged in the shielding water pool, and the accommodating cavity is formed by enclosing an inner side wall; a filling shielding layer is arranged at the opening end of the accommodating cavity and is filled in a gap between the outer wall of the pressure vessel for mounting the small reactor and the inner wall of the opening end of the accommodating cavity;
establish the high temperature resistant shielding piece at shielding pond top, the periphery that keeps off the part above small-size pressure vessel is located shielding pond is enclosed to high temperature resistant shielding piece, high temperature resistant shielding piece with fill shielding layer and be in succession.
2. The pool shield for a mini-stack of claim 1 further comprising: the top shielding layer is arranged at the top of the shielding water pool, the lateral shielding layer is arranged on the outer side wall of the shielding water pool, and the bottom shielding layer is arranged at the bottom of the shielding water pool;
the top shield layer, the lateral shield layer and the bottom shield layer shield gamma of a reactor core and secondary gamma generated after neutron shielding, and the top shield layer is connected with the high-temperature-resistant shield block.
3. The pool shield of claim 2, wherein said top shield, said side shields and said bottom shield are made of lead and/or stainless steel.
4. A pool shield for a mini-stack according to any of claims 1 to 3 wherein the upper surface of the core stack active section of the mini-stack pressure vessel is below the water level of the shield pool.
5. The pool shield for a mini-stack of claim 1, wherein the refractory shield block has a ring-shaped cross-section, and wherein the inner wall of the central through hole is closely attached to the outer wall of the pressure vessel of the mini-stack.
6. The pool shield for a mini-stack of claim 1 or 5, wherein the refractory shield block is made of any one of steel, graphite, boron carbide and boron steel.
7. The pool shield assembly of claim 1 or 5, wherein said refractory shield block together with said top facing shield layer enclose the top of said shielded pool of water.
8. The pool shield for a mini-stack of claim 1 further comprising: and the cooling and purifying device is communicated with the shielding water tank through a drain pipe and a water inlet pipe respectively.
9. The pool screen for a mini-stack of claim 8, wherein the drain pipe and the inlet pipe pass through the lateral screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011352228.9A CN112489826A (en) | 2020-11-26 | 2020-11-26 | Pool type shielding device for small-sized reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011352228.9A CN112489826A (en) | 2020-11-26 | 2020-11-26 | Pool type shielding device for small-sized reactor |
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| Publication Number | Publication Date |
|---|---|
| CN112489826A true CN112489826A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011352228.9A Pending CN112489826A (en) | 2020-11-26 | 2020-11-26 | Pool type shielding device for small-sized reactor |
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| Country | Link |
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| CN (1) | CN112489826A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335065A (en) * | 2008-08-06 | 2008-12-31 | 中国原子能科学研究院 | Neutron shielding device for pool type sodium-cooled fast reactor pit |
| US20150357058A1 (en) * | 2014-06-09 | 2015-12-10 | Babcock & Wilcox Mpower, Inc. | Nuclear reactor neutron shielding |
| CN106782679A (en) * | 2017-02-10 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of multi-tank type reactor |
| US20170162278A1 (en) * | 2015-11-01 | 2017-06-08 | Daniel Laughman | Block-type movable reflector/moderator (RM) for nuclear reactor control |
| CN108010591A (en) * | 2017-12-18 | 2018-05-08 | 中广核研究院有限公司 | A kind of multifunctional pressure container reactor pit structure and reactor safety shell structure |
| CN207474082U (en) * | 2017-12-08 | 2018-06-08 | 中国核动力研究设计院 | A kind of frame-type heap chamber bottom member for the radiation leakage beam shielding of presurized water reactor heap chamber |
| CN108417285A (en) * | 2018-02-06 | 2018-08-17 | 中国核电工程有限公司 | A kind of multiple labyrinth type fuel transfer tube shielding construction |
| CN108922643A (en) * | 2018-07-20 | 2018-11-30 | 中广核研究院有限公司 | A kind of small-sized heap reactor-loop overall structure of compact Layout |
| CN110767329A (en) * | 2019-11-05 | 2020-02-07 | 中国核动力研究设计院 | Pressurized water reactor cavity radiation beam leakage shielding device |
| CN211500416U (en) * | 2019-10-30 | 2020-09-15 | 中国船舶重工集团公司第七一九研究所 | U-shaped radiation-proof penetration shielding door shielding structure |
-
2020
- 2020-11-26 CN CN202011352228.9A patent/CN112489826A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335065A (en) * | 2008-08-06 | 2008-12-31 | 中国原子能科学研究院 | Neutron shielding device for pool type sodium-cooled fast reactor pit |
| US20150357058A1 (en) * | 2014-06-09 | 2015-12-10 | Babcock & Wilcox Mpower, Inc. | Nuclear reactor neutron shielding |
| US20170162278A1 (en) * | 2015-11-01 | 2017-06-08 | Daniel Laughman | Block-type movable reflector/moderator (RM) for nuclear reactor control |
| CN106782679A (en) * | 2017-02-10 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of multi-tank type reactor |
| CN207474082U (en) * | 2017-12-08 | 2018-06-08 | 中国核动力研究设计院 | A kind of frame-type heap chamber bottom member for the radiation leakage beam shielding of presurized water reactor heap chamber |
| CN108010591A (en) * | 2017-12-18 | 2018-05-08 | 中广核研究院有限公司 | A kind of multifunctional pressure container reactor pit structure and reactor safety shell structure |
| CN108417285A (en) * | 2018-02-06 | 2018-08-17 | 中国核电工程有限公司 | A kind of multiple labyrinth type fuel transfer tube shielding construction |
| CN108922643A (en) * | 2018-07-20 | 2018-11-30 | 中广核研究院有限公司 | A kind of small-sized heap reactor-loop overall structure of compact Layout |
| CN211500416U (en) * | 2019-10-30 | 2020-09-15 | 中国船舶重工集团公司第七一九研究所 | U-shaped radiation-proof penetration shielding door shielding structure |
| CN110767329A (en) * | 2019-11-05 | 2020-02-07 | 中国核动力研究设计院 | Pressurized water reactor cavity radiation beam leakage shielding device |
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Application publication date: 20210312 |