CN113948224A - Reactor and shielding assembly thereof - Google Patents
Reactor and shielding assembly thereof Download PDFInfo
- Publication number
- CN113948224A CN113948224A CN202111229812.XA CN202111229812A CN113948224A CN 113948224 A CN113948224 A CN 113948224A CN 202111229812 A CN202111229812 A CN 202111229812A CN 113948224 A CN113948224 A CN 113948224A
- Authority
- CN
- China
- Prior art keywords
- mounting plate
- shielding
- mounting
- assembly
- reactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
A reactor (1) and a shield assembly (10) therefor. The reactor (1) includes a reactor vessel (20) and a core (30) disposed within the reactor vessel (20), the shield assembly (10) including: a first mounting plate (121) mounted within the stack container (20); a second mounting plate (122) mounted within the reactor vessel (20) and between the first mounting plate (121) and the second mounting plate (122) for receiving a portion of a shielding device (125), the shielding device (125) for shielding neutrons generated by the core (30); and a fixing member (126) fixedly connecting the first mounting plate (121) and the second mounting plate (122). The shielding assembly (10) and the reactor (1) are fixedly connected with the first mounting plate (121) and the second mounting plate (122) through the fixing piece (126), so that the whole structure is stable, the anti-seismic effect is good, and the safety of the reactor can be ensured.
Description
Technical Field
The application relates to the technical field of reactors, in particular to a reactor and a shielding assembly thereof.
Background
The reactor is also called a nuclear reactor or a nuclear reactor, and is a device capable of maintaining a controllable self-sustaining chain type nuclear fission reaction so as to realize nuclear energy utilization. The reactor core of the reactor generates neutrons during a nuclear reaction, and the reactor in the related art has a shielding assembly for shielding neutrons, but the shielding assembly has poor stability, so that the safety of the reactor cannot be guaranteed.
Disclosure of Invention
The present application provides in one aspect a shield assembly for a reactor, the reactor including a reactor vessel and a core disposed within the reactor vessel, the shield assembly including: a first mounting plate mounted within the stack container; a second mounting plate mounted in the reactor vessel, the first mounting plate and the second mounting plate being configured to receive a portion of a shielding device for shielding neutrons generated by the core; the fixing piece is fixedly connected with the first mounting plate and the second mounting plate.
Another aspect of the present application provides a reactor comprising: a stack container; a core disposed within the reactor vessel; the reactor core comprises a reactor core, a shielding assembly, a first mounting plate and a second mounting plate of the shielding assembly, wherein the first mounting plate and the second mounting plate of the shielding assembly are mounted in the reactor vessel, and a shielding device of the shielding assembly is used for shielding neutrons generated by the reactor core.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 is a schematic diagram of a reactor configuration according to one embodiment of the present application;
FIG. 2 is an assembly view of a first mounting plate, a second mounting plate, and a fixture according to one embodiment of the present application;
FIG. 3 is an assembly view of a first mounting plate and attachment members according to one embodiment of the present application;
FIG. 4 is an assembly view of the first mounting plate, first fastener, and outer barrel according to one embodiment of the present application;
FIG. 5 is an assembly view of a second mounting plate, a second fastener, and an inner barrel according to one embodiment of the present application;
FIG. 6 is an assembly view of the first mounting plate, the third fastener, and the filler element according to one embodiment of the present application.
It is noted that the drawings are not necessarily to scale and are merely illustrative in nature and not intended to obscure the reader.
Description of reference numerals:
1. a reactor; 10. a shielding assembly; 101. a radially outer shield; 102. a radially inner shield; 103. shielding the middle part; 104. an upper shield; 105. a lower shield; 20. a stack container; 30. a core; 40. an intermediate heat exchanger; 50. a grid plate header; 60. a drive unit; 70. in-pile support; 71. supporting the upper plate; 72. a support plate; 73. a support floor; 121. a first mounting plate; 122. a second mounting plate; 123. a third mounting plate; 124. a fourth mounting plate; 125. a shielding device; 126. a fixing member; 127. a connecting member; 107. an outer cylinder; 106. an inner cylinder; 181. a first fastener; 182. a second fastener; 183. a third fastener; 184. and a filling member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
Embodiments of the present application first provide a shielding assembly 10 of a reactor 1, fig. 1 is a schematic structural view of the reactor 1 according to an embodiment of the present application; FIG. 2 is an assembly view of the first mounting plate 121, the second mounting plate 122, and the fixture 126 according to one embodiment of the present application; FIG. 3 is an assembly view of the first mounting plate 121 and the connector 127 according to one embodiment of the present application; FIG. 4 is an assembly view of the first mounting plate 121, the first fastener 181, and the outer barrel 107 according to one embodiment of the present application; FIG. 5 is an assembly view of the second mounting plate 122, the second fastener 182, and the inner barrel 106 according to one embodiment of the present application; FIG. 6 is an assembly view of the first mounting plate 121, the third fastener 183, and the filler member 184 according to one embodiment of the present application.
The reactor 1 includes a reactor vessel 20 and a core 30 disposed in the reactor vessel 20, and the shield assembly 10 includes a first mounting plate 121, a second mounting plate 122, and a fixing member 126.
A first mounting plate 121 is mounted within the stack 20; a second mounting plate 122 mounted in the reactor vessel 20, and a shielding device 125 is accommodated between the first mounting plate 121 and the second mounting plate 122, wherein the shielding device 125 is used for shielding neutrons generated by the core 30; the fixing member 126 is fixedly connected to the first mounting plate 121 and the second mounting plate 122.
Wherein the shielding device 125 may shield neutrons generated from the core 30 by reflecting and/or slowing the neutrons. For example, the shielding device 125 may be composed of a plurality of shields forming a multi-turn structure, and the shielding device 125 may include a stainless steel shield and/or a graphite shield, each turn of the stainless steel shield being composed of a plurality of stainless steel rods surrounding a turn. The outer side of each stainless steel rod is coated with a steel pipe, and each circle of graphite shielding piece consists of a plurality of graphite rods which are enclosed into a circle. The outer side of each graphite rod is coated with a steel pipe. The stainless steel rod mainly functions to reflect neutrons (collision of the stainless steel rod with neutrons, if elastic collision, macroscopically neutrons are reflected, and if inelastic collision, neutrons lose part of energy and have slow speed). The graphite rod is used for slowing down neutrons; that is, the energy of neutrons is reduced and the speed is lowered. The smaller the neutron energy, the more likely it is for the desired and monitoring controlled reaction to occur, so the presence of the graphite rod is more conducive to neutron monitoring. And the smaller the neutron energy is, the more difficult the neutron energy is to escape outwards, the neutron leakage can be reduced, and the service efficiency of the reactor core neutrons is improved. Wherein, the graphite rod can be the graphite shielding stick that contains boron, and these graphite shielding stick that contains boron and stainless steel stick can form closed radiation protection structure with regular triangle form staggered arrangement to promote shielding effect, that is to say, adjacent three graphite shielding stick that contains boron and stainless steel stick are arranged with regular triangle form. The fixing of these shielding bars in the stack is safe and reliable.
In some embodiments, the first mounting plate 121 is formed by splicing a plurality of sub-mounting plates, and the shielding assembly 10 includes a connecting member 127, wherein the connecting member 127 connects the plurality of sub-mounting plates, so that the first mounting plate 121 formed by splicing the plurality of sub-mounting plates closes the upper end of the accommodating space. From this, not only guarantee the shielding effect, can also improve the structural strength of first mounting panel 121. The connecting member 127 (which may be a bolt) is used to connect the first mounting plates 121 of the blocks, and fix the sub-mounting plates on the first mounting plates 121. The direct fit of the shielding bar and the sub-mounting plate can be clearance fit, the force in the horizontal direction is transmitted to the shielding bar during earthquake, and the connecting piece 127 is not stressed; and under the working condition of an earthquake SL-2, the vertical direction of the earthquake is pulled upwards by the sub-mounting plate.
In the related art, the first mounting plate and the second mounting plate are directly connected to the reactor, and the first mounting plate and the second mounting plate are not connected to each other, so that the structure is unstable, and the shielding assembly 10 provided by the embodiment of the present application is fixedly connected to the first mounting plate 121 and the second mounting plate 122 through the fixing members 126, so that the whole structure is stable, the anti-seismic effect is good, and the safety of the reactor can be ensured. Under the working condition of earthquake, the earthquake force in the horizontal direction is transmitted to the fixing piece 126 (which can be a stud) through the first mounting plate 121 and the second mounting plate 122 during earthquake, and the fixing piece 126 is subjected to bending stress; the fixing piece 126 is not stressed in the vertical direction under the working condition of the earthquake SL-1; the fastener 126 is vertically tensioned during an earthquake condition SL-2.
The reactor 1 may be a fast reactor, for example, a sodium-cooled fast reactor. The sodium-cooled fast reactor can comprise a reactor vessel 20, a reactor core 30 arranged in the reactor vessel 20, an intermediate heat exchanger 40, a grid plate header 50, a driving unit 60 for driving the flow of liquid sodium and the like.
In some embodiments, the second mounting plate 122 is disposed below the first mounting plate 121, and the shielding assembly 10 further includes a third mounting plate 123 and a fourth mounting plate 124. A third mounting plate 123 is mounted within the stack 20 and below the second mounting plate 122; a fourth mounting plate 124 is mounted within the stack 20 and is positioned below the third mounting plate 123; and another partial shielding device 125 is received between the second mounting plate 122 and the third mounting plate 123 and between the third mounting plate 123 and the fourth mounting plate 124, and the first mounting plate 121, the second mounting plate 122, the third mounting plate 123, the fourth mounting plate 124, the partial shielding device 125, and the another partial shielding device 125 form a receiving space for receiving the core 30. Therefore, the shielding assembly 10 has a good shielding effect, and the reactor 1 has a high space utilization rate.
That is, the shielding assembly 10 may include: and a radially outer shield 101 (composed of a third mounting plate 123, a fourth mounting plate 124, and a shield 125 disposed between the third mounting plate 123 and the fourth mounting plate 124) provided radially outside the core 30 and extending in the axial direction. In some embodiments, the shield assembly 10 may also include a radially inner shield 102 disposed between the core 30 and the radially outer shield 101 for reflecting neutrons. The radially inner shield 102 is a radial first pass shield located outside the core shroud. The radially inner shield 102 may be made of stainless steel. In the embodiment shown in the figures, the radially inner shield 102 is tailored by welding a plurality of layers of stainless steel sheet coils into a concentric sleeve. The radially inner shield 102 has a plurality of through holes formed in a lower portion thereof for fluid to flow therethrough.
The radially outer shield 101 and the radially inner shield 102 together form a radiation-blocking shield in the radial direction, and play a role in ensuring the maximum neutron fluence rate in the intermediate heat exchanger 40. Depending on the neutron detection requirements of the in-stack ionization chamber and the out-of-stack detector, it may be desirable to open the radially inner shield 102 and provide the radially outer shield 101 with an open configuration. On a side wall facing the drive unit 60 radially outside the radially outer shield 101, a stainless steel shield layer is provided for reducing radiation of neutrons to the drive unit 60.
The lower end of the radially inner shield 102 is substantially flush with the lower end of the radially outer shield 101, both lower than the lower end of the core 30; the upper end of the radially inner shield 102 is higher than the upper end of the core 30; the upper end of the radially inner shield 102 is higher than the upper end of the radially outer shield 101.
The shielding assembly 10 further includes: a middle shield 103 (composed of a second mounting plate 122, a third mounting plate 123, and a shielding device 125 disposed between the second mounting plate 122 and the third mounting plate 123) disposed above the radially outer shield 101, an upper end of the middle shield 103 being higher than an upper end of the radially inner shield 102. The middle shield 103 may have the same structure as the radially outer shield 101. It will be understood by those skilled in the art that the radially outer shield 101 and the middle shield 103 could theoretically be provided integrally, and the middle shield 103 is an extension of the radially outer shield 101, but the radially outer shield 101 and the middle shield 103 are provided separately due to the limitations of the manufacturing process. The number of turns of the shielding means of the radially outer shield 101 and the middle shield 103 may be 3-6 turns, such as 4 or 5 turns. Those skilled in the art will readily appreciate that the radially outer shield 101 and the central shield 103 may be similar or identical in construction, but may be different in height.
The shield assembly 10 may further include an upper shield 104 (composed of a first mounting plate 121, a second mounting plate 122, and a shield 125 disposed between the first mounting plate 121 and the second mounting plate 122) disposed above the middle shield 103 for blocking neutrons from leaking obliquely above into the upper portions of the intermediate heat exchanger 40 and the separate heat exchangers, serving to reduce the activity of secondary sodium.
In some embodiments, the upper shield 104 may comprise a plurality of turns of stainless steel shield (the shield arrangement may comprise a stainless steel shield and/or a graphite shield), each turn of stainless steel shield consisting of a plurality of stainless steel rods surrounding one turn. The outer side of each stainless steel bar is coated with a steel pipe.
The shielding assembly 10 may further include an outer cylinder 107, the outer cylinder 107 is disposed inside the stack container 20, the outer cylinder 107 is disposed outside the accommodating space, and the outer cylinder 107 and the first mounting plate 121 are connected by a first fastening member 181. The first fastening member 181 may be a bolt, thereby making the entire structure stable. The first fastener 181 is used to secure the first mounting plate 121 to the outer cylinder 107. During earthquake, the earthquake force in the horizontal direction acts on the first mounting plate 121 and then is transmitted to the first fastening member 181, and the first fastening member 181 is subjected to a shear force in the horizontal direction; the vertical direction is pulled upwards by the first mounting plate 121 under the earthquake working condition SL-2.
In some embodiments, the outer cylinder 107 may be an outer steel cylinder disposed radially outward of the upper shield 104 for fixedly mounting the middle shield 103 as well as the upper shield 104.
The shielding assembly 10 may further include an inner cylinder 106, the inner cylinder 106 is disposed in the accommodating space, and a bracket is formed on an outer surface of the inner cylinder 106 and connected to the second mounting plate 122 and/or the third mounting plate 123 by a second fastening member 182. The second fastening member 182 may be a bolt, thereby making the entire structure stable. The second fastening member 182 is used to fasten the second and third mounting plates. During earthquake, the horizontal earthquake force applied to the shielding rod is transmitted to the second mounting plate and the third mounting plate through the shielding rod, and the second fastening piece 182 is subjected to the horizontal shearing force of the second mounting plate and the third mounting plate; and under the working condition of an earthquake SL-2, the second mounting plate and the third mounting plate are pulled upwards in the vertical direction.
In some embodiments, the inner cylinder 106 may be an inner steel cylinder disposed between the radially outer shield 101 and the radially inner shield 102 for fixedly mounting the radially outer shield 101, the radially inner shield 102, and the middle shield 103.
The upper end of the inner steel cylinder is basically flush with the upper end of the middle shield 103, the lower end of the inner steel cylinder is basically flush with the lower end of the radial outer shield 101, and a plurality of through holes for fluid to flow are formed in the side wall of the inner steel cylinder, which is higher than the radial inner shield 102. The upper end of the outer steel cylinder is basically flush with the upper end of the upper shield, and the lower end of the outer steel cylinder is lower than the upper end of the radial inner shield.
The first mounting plate 121 may be mounted on the upper rim of the outer steel cylinder. The radial inner side of the second mounting plate 122 is mounted on the upper edge of the inner steel cylinder, and the radial outer side of the second mounting plate 122 is mounted at the middle lower part of the outer steel cylinder. The radially inner side of the third mounting plate 123 is mounted in the middle of the inner steel cylinder. The radially inner side of the fourth mounting plate 124 is mounted to the lower end of the inner steel cylinder.
It is understood that the above embodiments have been described with the inner and outer steel cylinders as the respective support members, but in other embodiments, the mounting plates may be supported by the steel cylinders of other internals.
The first mounting plate 121, the second mounting plate 122, the third mounting plate 123, and the fourth mounting plate 124 are provided with mounting holes for mounting the corresponding shielding devices 125. Therefore, the installation of the shielding device 125 is convenient, and the fixing effect is ensured.
In some embodiments, the mounting holes form a clearance fit with the corresponding shielding devices 125, thereby providing room for thermal expansion. These shielding bars do not deform in harmony when the internals thermally expand, thereby generating thermal stress.
A filling member 184 is disposed between the mounting hole of the first mounting plate 121 and the corresponding shielding device 125, and the filling member 184 is connected to the corresponding shielding device 125 through a third fastening member 183. Therefore, the stability of the whole structure is improved. The filling piece can be a steel ring, the horizontal direction earthquake force acts on the filling piece during earthquake, the filling piece and the third fastening piece 183 (which can be a bolt) deform together, and the horizontal direction is not stressed during earthquake; the vertical direction third fastening member 183 is deformed together with the shielding bar during an earthquake and is not subjected to a force.
The mounting holes of the second mounting plate 122 and/or the third mounting plate 123 are used for simultaneously mounting two shielding devices 125 arranged in the vertical direction. Therefore, the space utilization rate can be effectively improved. One of the two shielding means 125 is provided with a boss and the other of the two shielding means 125 is provided with a groove, the boss and the groove being clearance-fitted, whereby a space can be provided for thermal expansion.
The method for mounting the upper and lower shield structures will be briefly described below by taking the middle shield 103 and the upper shield 104 as examples. One end of the steel pipe is provided with a containing groove, a steel ring fixed by a bolt is arranged in the containing groove, the other end of the steel pipe is provided with a protruding structure, and a threaded hole is formed in the protruding structure. The containing groove of top steel pipe lower extreme stretches into the mounting hole downwards, and the protruding structure of below steel pipe upper end stretches into the containing groove, through the cooperation of bolt and screw thread with the top steel pipe and the same mounting hole that below steel pipe installed on. The mounting plate is used for bearing and is fixed on the inner steel cylinder through the bracket. Specifically, the support is welded on the inner steel cylinder, the mounting plate is fixed through a slotted screw, and the slotted screw and the bolt are reinforced through anti-loosening spot welding. The assembling manner of each shielding structure is similar, and is not described herein.
In some embodiments, the shield assembly 10 may further include a lower shield 105 (consisting of a fourth mounting plate 124, a fifth mounting plate disposed below the fourth mounting plate 124, and a shielding means between the fourth mounting plate 124 and the fifth mounting plate) disposed at a radial periphery of the grid header 50 below the radially outer shield 101 for shielding neutrons from entering the grid header 50, and the number of turns of the shield in the lower shield 105 may be 2 to 3 turns.
The lower shield 105 is provided with a plurality of passages for allowing pressure tubes of the sodium-cooled fast reactor to pass through. In order to facilitate the opening of the channel, the lower shield is not provided with a stainless steel bar or a graphite shielding bar at the position provided with the channel, but is provided with a shielding steel plate. The lower shield 105 may be disposed in a lower support of the in-stack support 70. The shielding around the core 30 penetrates through the in-core ionization chamber channel, the sodium level gauge and the thermocouple, and the in-core ionization chamber cooling channel, the sodium level gauge channel and the thermocouple channel can be arranged on the corresponding shielding structure according to the requirement.
The reactor 1 may further comprise an in-reactor support 70, the in-reactor support 70 comprising an upper support plate 71 at the upper part, a support plate 72 at the middle part and a support floor 73 at the bottom. The supporting upper plate 71 for supporting the driving unit 60 and the intermediate heat exchanger 40; a support plate 72 provided in the stack 20 to support the fourth mounting plate 124 and the core 30, thereby ensuring the overall structural strength and stability; the support floor 73 serves to support the header 50. The fourth mounting plate 124 may be mounted on the support plate 72; the fifth mounting plate may be mounted on the support base plate 73; the lower end of the radially inner shield 102 may be mounted on the support plate 72; the lower end of the inner steel cylinder may be mounted on the support plate 72.
The embodiment of the present application further provides a reactor 1, where the reactor 1 includes: a reactor vessel 20, a core 30, and any of the shield assemblies 10 described above. A core 30 disposed within the reactor vessel 20; the first and second mounting plates 121 and 122 of the shield assembly 10 are mounted in the reactor vessel 20, and the shield 125 of the shield assembly 10 shields neutrons generated from the core 30.
The shielding assembly 10 provided by the embodiment of the application can be used as a primary shielding connecting structure of a fast reactor, the shielding rods of the shielding assembly 10 can be safely and reliably fixed in the reactor (a large number of shielding rods in the reactor are radially and axially constrained and fixed, and the constrained and fixed are safe and reliable under various working conditions), and deformation incompatibility is not caused when members in the reactor are thermally expanded, so that thermal stress is generated. In some embodiments, the shielding device may have a total of 3 layers (coils) including 2 layers of boron-containing graphite shielding rods and 1 layer of steel shielding rods stacked on the in-stack support via 4 layers of mounting plates, which may be grid plates. All the bolts and studs connected with the grid plate can keep the initial connection relation and structural integrity through stress analysis. The embodiment of this application can have the support in the welding on outer barrel and/or interior barrel, and the mounting panel passes through the bolt fastening on the support. For the steel cylinder without supportable periphery, the upper mounting plate and the lower mounting plate can be connected through a long stud. The mounting plate is provided with mounting holes, the shielding rods penetrate through the mounting holes formed in the mounting plate through matching sizes, and the mounting can be facilitated through the arrangement of the matching sizes. The upper layer of the shielding rod can be seated on the lower layer of the shielding rod, and the seat connection part can adopt the clearance fit of the shaft hole. The upper end of the graphite rod can be in threaded connection with a circular nut, and the outer diameter of the nut is in clearance fit with the mounting hole of the mounting plate on the upper layer, so that the shielding rod is fixed radially. And a matching steel ring can be fixed on the end head of the shielding rod on the uppermost layer through a bolt and passes through the mounting hole on the mounting plate on the uppermost layer through clearance fit. The lower end of the graphite rod is arranged on the lower support plate in the reactor in a clearance fit with the mounting hole of the mounting plate at the lowest layer. Because the temperature of the inner steel cylinder is lower than that of the outer steel cylinder during normal operation, a sufficient gap is reserved between the head of the shielding rod and the mounting plate for deformation coordination during thermal expansion. The bolts and studs used for connecting the mounting plates can keep the initial connection relationship under earthquake load, and the structural integrity is kept.
It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.
Claims (13)
1. A shield assembly (10) for a reactor (1), the reactor (1) including a reactor vessel (20) and a core (30) disposed within the reactor vessel (20), the shield assembly (10) comprising:
a first mounting plate (121) mounted within the stack container (20);
a second mounting plate (122) mounted within the reactor vessel (20) and between the first mounting plate (121) and the second mounting plate (122) for receiving a portion of a shielding device (125), the shielding device (125) for shielding neutrons generated by the core (30);
and a fixing member (126) fixedly connecting the first mounting plate (121) and the second mounting plate (122).
2. The shielding assembly (10) according to claim 1, wherein the second mounting plate (122) is disposed below the first mounting plate (121), the shielding assembly (10) further comprising:
a third mounting plate (123) mounted within the stack container (20) and located below the second mounting plate (122);
a fourth mounting plate (124) mounted within the stack container (20) and located below the third mounting plate (123); and is
The second mounting plate (122) and the third mounting plate (123) and the fourth mounting plate (124) are configured to accommodate another shielding device (125), and the first mounting plate (121), the second mounting plate (122), the third mounting plate (123), the fourth mounting plate (124), the shielding device (125) and the another shielding device (125) form an accommodation space for accommodating the core (30).
3. The shielding assembly (10) according to claim 2, wherein the first mounting plate (121) is spliced from a plurality of sub-mounting plates, the shielding assembly (10) comprising:
and the connecting piece (127) is connected with the plurality of sub-mounting plates, so that the first mounting plates (121) formed by splicing the plurality of sub-mounting plates seal the upper ends of the accommodating spaces.
4. The shielding assembly (10) according to claim 2, further comprising:
an outer cylinder (107) disposed in the stack container (20), and the outer cylinder (107) disposed outside the accommodation space, the outer cylinder (107) and the first mounting plate (121) are connected by a first fastener (181).
5. The shielding assembly (10) according to claim 2, further comprising:
the inner cylinder body (106) is arranged in the accommodating space, a support is formed on the outer surface of the inner cylinder body (106), and the support is connected with the second mounting plate (122) and/or the third mounting plate (123) through a second fastener (182).
6. The shielding assembly (10) of claim 2,
the first mounting plate (121), the second mounting plate (122), the third mounting plate (123) and the fourth mounting plate (124) are provided with mounting holes for mounting the corresponding shielding devices (125).
7. The shielding assembly (10) of claim 6,
the mounting holes form a clearance fit with the corresponding shielding means (125).
8. The shielding assembly (10) of claim 6,
and a filling piece (184) is arranged between the mounting hole formed in the first mounting plate (121) and the corresponding shielding device (125), and the filling piece (184) is connected with the corresponding shielding device (125) through a third fastener (183).
9. The shielding assembly (10) of claim 6,
the mounting holes formed in the second mounting plate (122) and/or the third mounting plate (123) are used for simultaneously mounting two shielding devices (125) arranged in the vertical direction.
10. The shielding assembly (10) according to claim 9,
one of the two shielding devices (125) is provided with a boss, the other of the two shielding devices (125) is provided with a groove, and the boss is in clearance fit with the groove.
11. The shielding assembly (10) according to claim 2, further comprising:
and a support plate (72) provided in the stack tank (20) and supporting the fourth mounting plate (124) and the core (30).
12. The shielding assembly (10) according to claim 1,
the shielding device (125) shields the neutrons generated by the core (30) by reflecting and/or moderating the neutrons.
13. A reactor (1) comprising:
a stack container (20);
a core (30) disposed within the reactor vessel (20);
the shielding assembly (10) of any one of claims 1 to 12, a first mounting plate (121) and a second mounting plate (122) of the shielding assembly (10) being mounted within the stack (20), a shielding device (125) of the shielding assembly (10) being for shielding neutrons generated by the core (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111229812.XA CN113948224A (en) | 2021-10-22 | 2021-10-22 | Reactor and shielding assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111229812.XA CN113948224A (en) | 2021-10-22 | 2021-10-22 | Reactor and shielding assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113948224A true CN113948224A (en) | 2022-01-18 |
Family
ID=79332079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111229812.XA Pending CN113948224A (en) | 2021-10-22 | 2021-10-22 | Reactor and shielding assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113948224A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115862902A (en) * | 2022-09-22 | 2023-03-28 | 中国原子能科学研究院 | Reactor with a reactor core |
-
2021
- 2021-10-22 CN CN202111229812.XA patent/CN113948224A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115862902A (en) * | 2022-09-22 | 2023-03-28 | 中国原子能科学研究院 | Reactor with a reactor core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11120919B2 (en) | Small modular reactor fuel assembly | |
| Carelli et al. | The design and safety features of the IRIS reactor | |
| CA2808425C (en) | Compact nuclear reactor with integral steam generator | |
| US20080084957A1 (en) | Nuclear reactor fuel assemblies | |
| US10825571B2 (en) | Nuclear reactor support and seismic restraint with core retention cooling features | |
| CN112768093B (en) | Shielding structure, shielding assembly and sodium-cooled fast reactor | |
| CN109801719B (en) | Double-pressure-vessel type integrated nuclear reactor structure | |
| ZA200902918B (en) | A nuclear core component hold-down assembly | |
| US4751043A (en) | Radial neutron reflector | |
| CN113948224A (en) | Reactor and shielding assembly thereof | |
| JP2013540271A (en) | Retaining spring for nuclear fuel assembly | |
| JP2001188093A (en) | Liquid metal-cooled nuclear reactor and liquid metal- cooled nuclear power plant | |
| JPH0321878B2 (en) | ||
| US20080159465A1 (en) | Fast reactor | |
| EP2661751B1 (en) | Nuclear fuel rod plenum spring assembly | |
| US3311540A (en) | Integral boiling and superheating nuclear reactor and pressure tube assembly therefor | |
| EP2511909A2 (en) | Nuclear fuel pellet | |
| KR102468162B1 (en) | Pressurized water reactor fuel assembly | |
| US20130114780A1 (en) | Nuclear core component | |
| EP2839485B1 (en) | Small modular reactor control rod guide assembly | |
| RU2242810C2 (en) | Fuel assembly for water-moderated water-cooled reactor | |
| EP1213725B1 (en) | Ring plate around openings in reinforced concrete containment vessel | |
| CN115410728A (en) | Full natural circulation reactor body system | |
| RU2248629C2 (en) | Water-moderated water cooled-reactor core | |
| Riley | ADVANCED PRODUCTS OPERATION |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |