CN111627575A - Shielding assembly for reactor and shielding structure thereof - Google Patents
Shielding assembly for reactor and shielding structure thereof Download PDFInfo
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- CN111627575A CN111627575A CN202010529703.9A CN202010529703A CN111627575A CN 111627575 A CN111627575 A CN 111627575A CN 202010529703 A CN202010529703 A CN 202010529703A CN 111627575 A CN111627575 A CN 111627575A
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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
- G21C11/028—Biological shielding ; Neutron or gamma shielding characterised by the form or by the material
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/06—Sealing-plugs
- G21C13/073—Closures for reactor-vessels, e.g. rotatable
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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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Abstract
A shield structure for a reactor containment structure and a shield assembly having the same, wherein the reactor containment structure defines a containment cavity for containing at least a portion of a reactor and having an opening, the shield structure comprising: the shielding body is provided with a connecting part which is used for being connected with the reactor containing structure so that the shielding body covers the opening, and therefore at least part of radiation generated by at least part of the reactor is reduced from leaking out of the containing cavity from the opening. The shielding structure and the shielding assembly with the shielding structure have good radiation shielding effect due to the fact that radiation leaked from the opening to the outside of the containing cavity is reduced, and therefore personal safety and property safety of operating personnel are effectively guaranteed.
Description
Technical Field
The invention relates to the technical field of nuclear reactors, in particular to a shielding assembly for a reactor and a shielding structure thereof.
Background
The accommodating structure of the reactor is used for accommodating the reactor, although the accommodating structure of the reactor can play a certain role in reducing radiation, part of radiation generated by the reactor can still leak outwards through the opening due to the opening of the accommodating structure, and personal and property safety of operators is seriously harmed.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a shield assembly for a reactor and a shield structure thereof that overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a shielding structure for a reactor containment structure, wherein the reactor containment structure defines a containment cavity for containing at least part of a reactor and having an opening, the shielding structure comprising: the shielding body is provided with a connecting part which is used for being connected with the reactor containing structure so that the shielding body covers the opening, and therefore at least part of radiation generated by at least part of the reactor is reduced from leaking out of the containing cavity from the opening.
Optionally, the shield body comprises: at least one first shield and at least one second shield arranged along the extension direction of the containing cavity, wherein the first shield is made of a shielding material for shielding first radiation, and the second shield is made of a shielding material for shielding second radiation different from the first radiation, so that when the shielding body covers the opening, at least part of the first radiation and at least part of the second radiation generated by the at least part of the reactor are reduced to be leaked out of the containing cavity from the opening.
Optionally, each of the first shields includes a plurality of first sub-shields arranged along an extending direction of the opening, and each of the first sub-shields includes: the device comprises a first plate-shaped object, a second plate-shaped object arranged opposite to the first plate-shaped object, a support and a first filler, wherein the support is connected with the first plate-shaped object and the second plate-shaped object so as to define a shielding cavity together with the first plate-shaped object and the second plate-shaped object; and the first filler is arranged in the shielding cavity.
Optionally, the first plate, the second plate and the support are made of a metal material; the first filler comprises concrete.
Optionally, the at least one first shielding body is a plurality of first shielding bodies arranged along the extending direction of the accommodating cavity, and an orthographic projection of the first shielding body arranged relatively far away from the cavity bottom of the accommodating cavity on a vertical plane of the extending direction of the accommodating cavity covers an orthographic projection of the first shielding body arranged relatively close to the cavity bottom of the accommodating cavity on the vertical plane.
Optionally, the contact surfaces between all the first sub-shields do not have intersection points of the plurality of projection lines on the vertical plane.
Optionally, at least a portion of the adjacent first shields are configured to generate a receiving space between the adjacent first shields when disposed in the reactor receiving structure, at least one of the second shields is disposed in the receiving space, and of the adjacent first shields, the first shield near the bottom of the receiving cavity is configured to support all of the second shields disposed in the receiving space, and of all of the second shields in the receiving space, the second shield far from the bottom of the receiving cavity is spaced apart from the first shield far from the bottom of the receiving cavity.
Optionally, each of the second shields includes a plurality of second sub-shields arranged along an extending direction of the opening, and a contact surface between the plurality of second sub-shields at least includes a plurality of sub-contact surfaces having different curved surfaces or extending directions.
Optionally, the connection portion includes at least one connection hole opened in the shield body, the at least one connection hole is used for connecting a connection member, and the connection hole is connected with the reactor accommodating structure through the connection member.
Optionally, the connection portion comprises at least one limiting structure formed on the shielding body, and the at least one limiting structure is configured to cooperate with the reactor accommodating structure to limit movement of the shielding body in at least part of the direction when the shielding body is connected to the reactor accommodating structure.
Optionally, the shielding body still includes detachable hoist and mount portion, hoist and mount portion is used for supplying outside application of force instrument application of force.
Optionally, the shielding body is provided with a through hole, and the through hole is used for enabling another part of the reactor to extend out of the accommodating cavity through the through hole.
Optionally, the shielding structure further includes: the third shielding body is arranged at a position, corresponding to the through hole, on one side, far away from the cavity bottom of the accommodating cavity, of the shielding body, an accommodating space is defined by the third shielding body and the shielding body together, the accommodating space is used for accommodating the other part of the reactor, and the third shielding body is used for reducing at least part of radiation generated by the other part of the reactor from leaking out of the accommodating space.
Optionally, the third shield is made of a shielding material for shielding a third radiation and a shielding material for shielding a fourth radiation different from the third radiation, so that the third shield is used for reducing leakage of at least a part of the third radiation and at least a part of the fourth radiation generated by the other part of the reactor to the outside of the accommodating space.
Optionally, a groove is arranged in a region of the shielding body corresponding to the through hole, and is used for providing an operation space for installing a part of the reactor corresponding to the through hole; and the second filler is used for filling the groove after the part of the reactor corresponding to the through hole is installed.
Optionally, the second filler comprises concrete.
According to another aspect of the present invention, there is provided a shield assembly for a reactor, comprising: a reactor containment structure defining a containment cavity for containing at least a portion of the reactor and having an opening; the shielding structure of any one of the above claims, wherein a shielding body of the shielding structure is configured to cover the opening.
The shielding structure and the shielding assembly with the shielding structure have better radiation shielding effect because radiation leaked from the opening to the outside of the accommodating cavity is reduced, thereby effectively ensuring the personal and property safety of operating personnel.
Drawings
FIG. 1 is a cross-sectional view of a shield assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a shielding structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a shielding structure according to an embodiment of the invention;
FIG. 4 is a schematic view of a portion of a first sub-shield of a first shield of the shielding structure according to the embodiment of the invention;
FIG. 5 is a schematic view of a portion of a first sub-shield of another first shield of the shielding structure according to the embodiment of the invention;
fig. 6 is a schematic diagram illustrating a connection manner of a second sub-shield of a second shield of the shielding structure according to the embodiment of the invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.
Embodiments of the invention first provide a shielding structure 100 for a reactor housing structure 200, fig. 1 is a cross-sectional view of a shielding assembly according to an embodiment of the invention (the shielding assembly in fig. 1 shows the shielding structure 100 of the present embodiment), referring to fig. 1, the reactor housing structure 200 defines a housing cavity 210 for housing at least a part of a reactor 300 and having an opening, and the reactor housing structure 200 may be configured, for example, according to the structural requirements of different types of reactors 300: a concrete reactor cavity of an underground nuclear power station, a pool of a pool reactor, a shielding wall of the nuclear power station and the like.
The shielding structure 100 comprises a shielding body 10, the shielding body 10 has a connecting portion 20, and the connecting portion 20 is used for connecting with the reactor accommodating structure 200, so that the shielding body 10 covers the opening of the reactor accommodating structure 200, thereby reducing at least part of radiation generated by at least part of the reactor 300 from leaking out of the accommodating cavity 210 from the opening. It is understood that the position of the opening of the reactor accommodating structure 200 is not limited to the position of the opening on the top of the accommodating structure 200 shown in fig. 1, and the opening of the reactor accommodating structure 200 may be at any position and even in any shape according to different requirements, and the shielding body 10 may be adjusted accordingly to cover the opening.
The shielding structure 100 of the present embodiment has a better radiation shielding effect due to the reduction of radiation leaking from the opening to the outside of the accommodating cavity 210, thereby effectively ensuring the personal and property safety of the operating personnel, for example, avoiding the malfunction and damage of instruments and meters near the reactor 300.
It will be appreciated by those skilled in the art that the portion of radiation reduced by the shielding structure 100 may be not only nuclear radiation, but also thermal radiation. The region of the shield body 10 corresponding to the reactor accommodating structure 200 may be adapted to the region of the reactor accommodating structure 200 corresponding to the shield body 10 to improve the stability of the connection.
Further, fig. 2 is a schematic structural diagram of the shielding structure 100 according to the embodiment of the invention; fig. 3 is a cross-sectional view of the shielding structure 100 according to an embodiment of the present invention, and referring to fig. 1, 2 and 3, in some embodiments, the shielding body 10 may include at least one first shielding body 11 and at least one second shielding body 12 arranged along the extending direction of the accommodating cavity 210, and in order to meet the requirement of biological shielding, the first shielding body 11 is made of a shielding material for shielding first radiation, and the second shielding body is made of a shielding material for shielding second radiation different from the first radiation, so that when the shielding body 10 covers the opening of the reactor accommodating structure 200, leakage of at least a part of the first radiation and at least a part of the second radiation generated by the reactor 30 in the accommodating cavity 210 to the outside of the accommodating cavity 210 can be reduced.
In some embodiments, the first radiation is photon radiation, the second radiation is neutron radiation, and correspondingly, the shielding material of the first shielding body 11 generally adopts elements with high atomic numbers, such as: steel, lead, ordinary concrete, heavy concrete, etc., the shielding material of the second shielding body 12 is usually neutron-shielded by a substance with a small atomic number or containing a large amount of hydrogen, such as: lithium hydride, boron, graphite, and the like. It is understood that the shielding structure 100 may include any number of the first and second shields 11 and 12 according to different requirements, and may be arranged and arranged in any manner according to actual requirements.
Fig. 4 is a schematic view of a part of the first sub-shield 110 of one first shield 11 of the shielding structure 100 according to the embodiment of the present invention, fig. 5 is a schematic view of a part of the first sub-shield 110 of another first shield 11 of the shielding structure 100 according to the embodiment of the present invention, and in some embodiments, referring to fig. 1 and 4, and 5, for convenience of installation, each first shield 11 includes a plurality of first sub-shields 110 arranged along an extending direction of an opening of the reactor accommodating structure 200, and each first sub-shield 110 includes: the first plate-shaped object 111, the second plate-shaped object 112 arranged opposite to the first plate-shaped object 111, a support 113 and a first filler 114, wherein the support 113 connects the first plate-shaped object 111 and the second plate-shaped object 112 and defines a shielding cavity together with the first plate-shaped object 111 and the second plate-shaped object 112, the first filler 114 is arranged in the shielding cavity, and the modular first sub-shield 110 is arranged to facilitate the installation of the first shield 11. The first plate-shaped object 111 or the second plate-shaped object 112 may be perpendicular to the supporting member 113, so that the cross section of the first plate-shaped object 111 and the supporting member 113 or the cross section of the second plate-shaped object 112 and the supporting member 113 is T-shaped, thereby improving the structural strength.
Further, in some embodiments, the first plate 111, the second plate 112, and the support 113 are made of metal, preferably, steel material, so that the first sub-shield 110 has high strength and the thickness of the first sub-shield 110 can be effectively reduced, the first filler 114 includes concrete to reduce the cost, the materials containing elements with high atomic number have good photon shielding effect, and concrete with different densities can be designed according to the requirements of different shielding energy spectrums. In some embodiments, to facilitate the installation of the first shield 111, the first plate 111, the second plate 112, and the support 113 may be connected to the reactor accommodating structure 200, and then the first filler 114 may be filled.
In some embodiments, in order to improve the connection strength between the first filler 114 and the support 113, the support 113 is configured to further include a plurality of pegs and angles in different directions and numbers, so that the pegs and angles may be left inside the first filler 114 after the first filler 114 is solidified, fixing the first filler 114 and the support 113.
In some embodiments, the shielding structure 100 includes a plurality of first shields 11 arranged along the extending direction of the accommodating chamber 210, refer to fig. 1 to 3, and an orthographic projection of the first shield 11 disposed relatively far away from the bottom of the accommodating chamber 210 on a vertical plane of the extending direction of the accommodating chamber 210 covers an orthographic projection of the first shield 11 disposed relatively close to the bottom of the accommodating chamber 210 on the vertical plane, for example, when the reactor accommodating structure 200 is opened at the top and the opening is circular as shown in fig. 1, the first shield 11 located relatively above has a relatively large diameter, and such an arrangement is that neutrons and photons do not leak from an oblique direction when the plurality of first shields 11 are connected to the reactor accommodating structure 200.
Further, in some embodiments, the shielding structure 100 includes a plurality of first shields 11 arranged along the extending direction of the accommodating cavities 210, each first shield 11 further includes a plurality of first sub-shields 110 arranged along the extending direction of the opening, the contact surface between these first sub-shields 110 has a plurality of projected lines on the vertical plane, which have no intersection point between them, for example, in the shielding structure as shown in fig. 1 to 3, the contact surfaces between the plurality of first sub-shields 110 of the upper first shield 11 and the contact surfaces between the plurality of first sub-shields 110 of the lower first shield 11 are staggered, the projection lines of the contact surfaces on the vertical plane have no intersection, namely, no through part exists in the gap between the upper contact surface and the lower contact surface, thereby preventing radiation from leaking out of the gaps at the interface between these first sub-shields 110.
In some embodiments, at least a portion of the adjacent first shields 11 are configured to generate a receiving space between the adjacent first shields 11 when disposed in the reactor receiving structure 200, at least one second shield 12 is disposed in the receiving space, and, of the adjacent first shields 11, the first shield 11 near the bottom of the receiving cavity 210 is used to support all the second shields 12 disposed in the receiving space, among all the second shields 12 in the receiving space, the second shield 12 far away from the bottom of the receiving cavity 210 is disposed at a distance from the first shield 11 far away from the bottom of the receiving cavity in the adjacent first shields 11, in other words, referring to fig. 1, the second shield 12 is disposed between two adjacent first shields 11 in some embodiments, since the first shielding bodies 11 generally have high weight and strength, the second shielding bodies 12 are arranged to be supported by one of the first shielding bodies 11 and to be spaced apart from the other second shielding body 11, for example, the second shielding body 12 in fig. 1 is supported by the first shielding body 11 located below, and the first shielding body 11 located above is fixed to the reactor accommodating structure 200 to be spaced apart from the first shielding body 11 located below by a predetermined distance, so that it is not required to be supported by the second shielding body 12, and thus the second shielding body 12 is not pressed by the first shielding body 11.
To further facilitate installation, in some embodiments, the second shield 12 may also include a plurality of second sub-shields 120 arranged along the extending direction of the opening of the reactor accommodating structure 200, in order to prevent radiation from leaking from gaps of the contact surfaces of the second sub-shields 120, the contact surface between the second sub-shields 120 is configured to include at least a plurality of sub-contact surfaces with curved surfaces or extending directions different from each other, fig. 6 is a schematic view of a connection manner of the second sub-shields 120 of one kind of second shields 12 of the shielding structure 100 according to an embodiment of the present invention, and fig. 6 shows schematic views of two kinds of sub-contact surfaces, it can be understood that the sub-contact surfaces may be provided in various forms, and only one curved surface may be provided as a contact surface to achieve the same function.
The shielding structure 100 further comprises a connecting portion 20, the connecting portion 20 is used for connecting the shielding structure 100 to the reactor accommodating structure 200, in some embodiments, the connecting portion 20 comprises at least one connecting hole 21 opened in the shielding body 10, the connecting hole 21 is used for connecting a connecting member, the connecting hole 21 is connected with the reactor accommodating structure 200 through the connecting member, and the connecting member can be configured as a bolt, an anchor bolt, or the like, for example. In some embodiments, referring to fig. 4, the first shield 11 is disposed with a plurality of first sub-shields 110, and in these embodiments, at least one connection hole 21 is provided in each of the first sub-shields 110. As will be understood by those skilled in the art, the connecting hole 21 may be formed at a position corresponding to each of the first shields 11 and the second shields 12.
In some embodiments, the connecting portion 20 further includes at least one limiting structure 22 formed with the shielding body 10, and configured to cooperate with a structure formed on the reactor accommodating structure 200 to limit the movement of the shielding body 10 in at least a portion of the direction when the shielding body 10 is connected to the reactor accommodating structure 200, for example, referring to fig. 2 and 5, in some embodiments, the limiting structure 22 is configured as a groove formed on the first shielding body 11, and a corresponding protrusion (not shown) is provided on the reactor accommodating structure 200 to limit the movement of the shielding body 10 in the horizontal plane, and it is understood that the limiting structure 22 may also be a protrusion formed on the shielding body or other structures capable of achieving the same function.
In some embodiments, in order to facilitate the installation of the shielding structure 100, the shielding body 10 further includes a hanging portion 30 detachably disposed for applying force by an external force application tool, for example, referring to fig. 2 to 3, the hanging portion 30 may be configured as a lifting lug and connected to the first shielding body 11 by a bolt, in the illustrated embodiment, the hanging portion 30 is used to cooperate with a lifting device, the first shielding body 11 located below is connected to the reactor accommodating structure 200, then the hanging portion 30 is detached to prevent the interference of the hanging portion with a subsequent installation process, and a hole left by the hanging portion 30 is filled with a first filler 114 to prevent radiation leakage, and then the installation of the second shielding body 12 and the first shielding body 11 above is performed again. In some embodiments, the sling 30 may be connected to the second shield 12 when the second shield 12 is installed, after the installation, the sling 30 is detached and the remaining aperture is filled with the second shield material, and then the sling 30 is connected to the upper first shield 11 and the installation is continued, that is, before the first shield 11 or the second shield 12 is installed each time, the sling 30 of the installed first shield 11 or second shield 12 is detached. Those skilled in the art will appreciate that the sling 30 of the first shield 11 or the second shield 12 away from the bottom of the cavity may be provided non-removable.
In some embodiments, some structures of the reactor 300 need to pass through the shielding structure 100, for example, a pump, an ionization chamber, a liquid level meter, a heat exchanger, a lifter, a refueling machine, and the like, and in these embodiments, referring to fig. 1 and 5, the shielding body 10 is provided with a through hole 13 for extending the structures out of the accommodating cavity 210.
Further, in order to shield the radiation generated by the above-mentioned structure of the reactor 300 extending out of the accommodating cavity 210, in some embodiments, as shown in fig. 1 to 3, the shielding structure 100 further includes a third shielding body 14 disposed at a position corresponding to the through hole 13 on a side of the shielding body 10 away from the bottom of the accommodating cavity, and the third shielding body and the shielding body 10 together define an accommodating space 15 for accommodating the above-mentioned structure and reducing at least part of the radiation generated by the part of the structure from leaking out of the accommodating space 15.
Further, the third shield 14 is made of a shielding material for shielding a third radiation and a shielding material for shielding a fourth radiation different from the third radiation, in some embodiments, the third radiation is equivalent to the first radiation shielded by the first shield 11, the fourth radiation is equivalent to the second radiation shielded by the second shield 12, and in some embodiments, the third radiation and the fourth radiation may be other types of radiation.
The third shield 14 may be composed of an inner steel plate, an intermediate boron-containing plate and an outer steel plate. The side of the third shield 14 may also be provided with a lifting lug for lifting and mounting the third shield 14, and the lower surface is fixed to the surface of the shield body 10 away from the cavity bottom by welding or bolting.
In some embodiments, as shown in fig. 3 and 5, the region of the shield body 10 corresponding to the through hole 13 is provided with a groove 16 for providing an operation space when the reactor 300 is installed through a part of the structure of the through hole 13, so that the installation of the structures can be more conveniently performed, and the structures can be fixed in the through hole by a structure such as a flange. After the installation is completed, the recess 16 is filled with a second filler 17, which second filler 17 on the one hand prevents radiation from leaking out of the recess 16 or the through-hole 13 and on the other hand also enables a further support and fixing of the part of the structure of the reactor 300 that passes through the through-hole 13. Further, the second filler 17 comprises concrete, so that the radiation shielding and supporting functions can be better achieved.
The shielding structure 100 provided by this embodiment can be formed by randomly splicing the first shielding bodies 11 and the second shielding bodies 12 with different numbers of layers according to the requirement of the reactor 300 for radiation shielding, and can effectively shield neutrons, primary photons, secondary photons and thermal radiation. After the concatenation combination, except satisfying the shielding radiation protection requirement, still can provide reliable, safe support for the partial structure of reactor 300, guarantee this partial structure can not produce excessive axial or radial deformation, and then guarantee the function of this partial structure, shielding structure 100 under the prerequisite that satisfies shielding property, simple structure, can arbitrary modularization concatenation equipment, the installation is dismantled conveniently, the cost is with low costs, anti-seismic performance is good.
The present embodiment also provides a shielding assembly, referring to fig. 1, the shielding assembly includes a reactor accommodating structure 200, the reactor accommodating structure 200 defines an accommodating cavity 210 for accommodating at least a part of the reactor 300 and having an opening; the shielding structure 100 of any one of the above embodiments, wherein the shielding body 10 of the shielding structure 100 is used to cover the opening of the accommodating cavity 210.
The shielding assembly of the invention has better radiation shielding effect because radiation leaked from the opening to the outside of the accommodating cavity is reduced, thereby effectively ensuring the personal and property safety of operators, for example, avoiding the failure and damage of instruments and meters near the reactor 300.
It will be appreciated by those skilled in the art that the reactor containment structure 200 may also be made of a material that is shielded from radiation, such as a shielding material that shields neutrons, photons, etc., to reduce leakage of the generated radiation from the reactor 300 in all directions, effectively reducing the radiation to within acceptable dose levels for the radiation protection control zone.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.
Claims (17)
1. A shielding structure (100) for a reactor containment structure (200), wherein the reactor containment structure (200) defines a containment cavity (210) for containing at least part of a reactor (300) and having an opening, the shielding structure (100) comprising:
a shield body (10), the shield body (10) having a connection portion (20), the connection portion (20) being adapted to be connected to the reactor housing structure (200) such that the shield body (10) covers the opening, thereby reducing leakage of at least part of the radiation generated by the at least part of the reactor (300) from the opening to outside the housing cavity (210).
2. The shielding structure (100) according to claim 1, wherein the shielding body (10) comprises:
at least one first shield (11) and at least one second shield (12) arranged along the extension direction of the accommodation chamber (210), wherein
The first shield (11) is made of a shielding material for shielding a first radiation, and the second shield (12) is made of a shielding material for shielding a second radiation different from the first radiation, so that when the shielding body (10) covers the opening, at least part of the first radiation and at least part of the second radiation generated by the at least part of the reactor (300) are reduced from leaking out of the accommodating cavity (210) from the opening.
3. The shielding structure (100) according to claim 2, wherein each of the first shields (11) comprises a plurality of first sub-shields (110) arranged along an extension direction of the opening, each of the first sub-shields (110) comprising:
a first plate-like object (111), a second plate-like object (112) arranged opposite to the first plate-like object (111), a support (113) and a first filler (114), wherein
The support (113) connects the first plate-shaped object (111) and the second plate-shaped object (112) to define a shielding cavity together with the first plate-shaped object (111) and the second plate-shaped object (112); and is
The first filler (114) is disposed in the shielded cavity.
4. The shielding structure (100) according to claim 3, wherein the first plate (111), the second plate (112) and the support (113) are made of a metallic material, the first filler (114) comprising concrete.
5. The shielding structure (100) according to claim 3, wherein the at least one first shield (11) is a plurality of first shields (11) arranged along an extension direction of the receiving cavity (210), and,
the orthographic projection of the first shielding body (11) arranged at the cavity bottom relatively far away from the accommodating cavity (210) on a vertical plane of the extending direction of the accommodating cavity (210) covers
An orthographic projection of the first shield (11) on the vertical plane, disposed relatively close to a cavity bottom of the accommodation cavity (210).
6. The shielding structure (100) according to claim 5, wherein the contact surfaces between all the first sub-shields (110) have no intersection point of the plurality of projection lines on the vertical plane.
7. The shielding structure (100) according to claim 5, wherein at least partially adjacent first shields (11) are configured to
Arranged in the reactor receiving structure to create a receiving space between the adjacent first shields (11), at least one second shield (12) being arranged in the receiving space, and,
of the adjacent first shields (11), the first shield (11) close to the bottom of the accommodating cavity (210) is used for supporting all the second shields (12) arranged in the accommodating space,
in all the second shielding bodies (12) in the accommodating space, the second shielding body (12) far away from the cavity bottom of the accommodating cavity (210) and the first shielding body (11) far away from the cavity bottom of the accommodating cavity in the adjacent first shielding body (11) are arranged at intervals.
8. The shielding structure (100) according to claim 2,
each second shield body (12) comprises a plurality of second sub shield bodies (120) arranged along the extending direction of the opening, and the contact surface among the plurality of second sub shield bodies (120) at least comprises a plurality of sub contact surfaces with different curved surfaces or extending directions.
9. The shielding structure (100) according to claim 1,
the connecting part (20) comprises at least one connecting hole (21) arranged in the shielding body (10), the at least one connecting hole (21) is used for connecting a connecting piece, and the connecting hole (21) is connected with the reactor accommodating structure (200) through the connecting piece.
10. The shielding structure (100) according to claim 1, wherein the connecting portion (20) comprises at least one position-limiting structure (22) formed on the shielding body (10), and
the at least one limiting structure (22) is arranged to cooperate with the reactor receiving structure (200) to limit movement of the shielding body (10) in at least part of a direction when the shielding body (10) is connected to the reactor receiving structure (200).
11. The shielding structure (100) according to claim 1, wherein said shielding body (10) further comprises a detachable sling (30), said sling (30) being adapted to be forced by an external forcing means.
12. Shielding structure (100) according to claim 1, wherein the shield body (10) is perforated with a through hole (13),
the through hole (13) is used for enabling another part of the reactor (300) to extend out of the accommodating cavity (210) through the through hole (13).
13. The shielding structure (100) according to claim 12, wherein the shielding structure (100) further comprises:
a third shield (14) disposed at a position corresponding to the through hole (13) on a side of the shield body (10) away from the bottom of the accommodating chamber, and
the third shielding body (14) and the shielding body (10) jointly define a containing space (15), the containing space (15) is used for containing the other part of the reactor (300), and the third shielding body (14) is used for reducing at least part of radiation generated by the other part of the reactor (300) from leaking out of the containing space (15).
14. The shielding structure (100) according to claim 13, wherein the third shielding body (14) is made of a shielding material for shielding a third radiation and a shielding material for shielding a fourth radiation different from the third radiation, such that the third shielding body (14) is configured to reduce leakage of at least a portion of the third radiation and at least a portion of the fourth radiation generated by the other portion of the reactor (300) out of the receiving space (15).
15. The shielding structure (100) according to claim 12, wherein a region of the shielding body (10) corresponding to the through hole (13) is provided with
A groove (16) for providing an operation space when the portion of the reactor (300) corresponding to the through hole (13) is installed;
and a second filler (17) for filling the groove (16) after the installation of the part of the reactor (300) corresponding to the through hole (13) is completed.
16. The shielding structure (100) according to claim 15, wherein the second filler (17) comprises concrete.
17. A shield assembly for a reactor (300), comprising:
a reactor containment structure (200), the reactor containment structure (200) defining a containment cavity (210) for containing at least part of the reactor (300) and having an opening;
shielding structure (100) according to any one of claims 1 to 16, wherein a shielding body (10) of the shielding structure is adapted to cover the opening.
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