阅读说明：本技术 一种用于紧凑布置小型堆的屏蔽装置 (Shielding device for compactly arranging small stacks ) 是由 魏旭东 彭祥阳 韩万富 邓玺 倪亮 路广遥 刘青松 唐叔建 周建明 侯硕 冯勇 于 2020-11-26 设计创作，主要内容包括：本发明公开了一种用于紧凑布置小型堆的屏蔽装置,沿抑压水池的设备环腔朝内布置,并紧贴抑压水池环腔立面,包括：屏蔽罩体,屏蔽罩体设为多层,每层屏蔽罩体由多块屏蔽模块经拼接及围挡而成,屏蔽罩体上设有多个用以放置反应堆构件的装配位；相邻层的屏蔽罩体之间设有支撑构件,支撑构件的相对两侧紧固在相邻的至少两块屏蔽模块上；以及紧固在支撑构件上和/或底层屏蔽罩体端部的止挡构件,其中：通过止挡构件和支撑构件将屏蔽罩体紧贴在抑压水池的设备环腔的立面上。实施本发明的用于紧凑布置小型堆的屏蔽装置,能够实现模块化分区位拆装,有效利用空间,不影响主设备的在役检查；结构精简,有效降低反应堆二次屏蔽的重量,降低工程造价。(The invention discloses a shielding device for compactly arranging small-sized piles, which is inwards arranged along an equipment annular cavity of a suppression water pool and is tightly attached to a vertical surface of the annular cavity of the suppression water pool, and comprises: the reactor component shielding cover comprises a shielding cover body, wherein the shielding cover body is provided with a plurality of layers, each layer of shielding cover body is formed by splicing and surrounding a plurality of shielding modules, and a plurality of assembling positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and the two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the underlying shielding cage, wherein: the shielding cover body is clung to the vertical surface of the equipment ring cavity of the suppression pool through the stopping component and the supporting component. The shielding device for compactly arranging the small piles can realize modularized position division disassembly and assembly, effectively utilize space and do not influence the in-service inspection of main equipment; the structure is simple, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.)

1. A shielding assembly for a compact deployment mini-stack disposed inwardly along and closely adjacent to a suppression pool annulus elevation, comprising:

the reactor component shielding cover comprises a shielding cover body, wherein the shielding cover body is provided with a plurality of layers, each layer of shielding cover body is formed by splicing and surrounding a plurality of shielding modules, and a plurality of assembling positions for placing reactor components are arranged on the shielding cover body;

a supporting member is arranged between the shielding cover bodies of the adjacent layers, and the two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and

a stop member secured to the support member and/or to an end of an underlying shielding cage, wherein:

the shielding cover body is tightly attached to the vertical surface of the equipment ring cavity of the suppression pool through the stopping component and the supporting component.

2. The shielding device of claim 1, wherein said shielding module is a hollow structure filled with one or more shielding materials in a mosaic arrangement.

3. The shielding apparatus for a compact deployment mini-stack of claim 1 wherein the shielding module is a stainless steel can structure and the weld of the stainless steel can is a continuous, full penetration weld.

4. A screen for a compact arrangement mini-stack as defined in claim 3 wherein the stainless steel enclosure is provided with an aperture for venting air.

5. The shielding device for a compact arrangement of mini-stacks as claimed in claim 1, wherein the plurality of shielding modules are connected in a lap joint or miter joint to ensure a leak-free.

6. The screen apparatus for compact placement of mini-stacks as in claim 1 wherein said support member is a support plate welded to the vertical face of the main equipment cavity of the suppression pool providing a mounting datum for said stop member.

7. The shielding device for compact arrangement of small stacks as claimed in claim 1, wherein said stop member comprises: a bottom stop block and a middle stop block, wherein: one end of the bottom stop block is connected with a structure, and the side surface of the bottom stop block is fastened on the vertical surface of the shielding module;

the middle stop block is connected to the vertical surfaces of two adjacent shielding modules through the supporting member.

8. The shield for a compact deployment mini-stack of claim 1 wherein the top of the shield for a compact deployment mini-stack is secured to a steel platform.

Technical Field

The invention relates to the field of nuclear power, in particular to a shielding device for compactly arranging small stacks.

Background

In order to meet the use requirements of the marine environment and the limitation of narrow arrangement space such as limited arrangement in a cabin, a primary loop nuclear island main device usually adopts a compact arrangement form, such as an integrated design, a short pipe connection and the like. The shielding scheme of the existing small reactor structure is not perfect, and the problems of large design and implementation difficulty of the shielding structure and the like exist.

In addition, the module is rectangular plate, need to adopt the screw to carry out mechanical locking, arrange in the shielding face, the shielding module adopts single face cladding, shielding material to density board etc. this structure can't satisfy this kind of curved surface of heap hole and arranges, can't satisfy the high temperature of nearly heap department, can't satisfy the leakproofness demand of shielding material cladding, can't satisfy the installation location demand in this kind of narrow and small space of heap hole, and the density board can't satisfy neutron shielding demand.

Meanwhile, the existing small reactor cannot be applied to the environment that the distance between main equipment such as a main pump steam generator is narrow, and the requirements for the reactor core and the out-of-reactor shielding are also higher, for example: the existing small reactor generally adopts an integrated or double-layer casing connection mode and the like, the size of a reactor pressure vessel is small, the inner wall of an RPV (resilient pressure vessel) is close to a reactor core, and neutrons reflected by the reactor core are easy to generate irradiation damage to the inner wall of the reactor pressure vessel; and the clearance between the main equipment is narrow, and the main equipment is nearer apart from the reactor core, and the installation that the current shield structure of using often has not been able to adapt to above-mentioned structure.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a shielding device for compactly arranging small heaps, which can realize modularized position division disassembly and assembly, effectively utilize space and does not influence the in-service inspection of main equipment; the structure is simple, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.

To solve the above technical problem, an embodiment of the present invention provides a shielding apparatus for compact arrangement of a small-sized pile, which is arranged inward along an equipment annular cavity of a suppression water tank and closely attached to a vertical surface of the suppression water tank annular cavity, including: the reactor component shielding cover comprises a shielding cover body, wherein the shielding cover body is provided with a plurality of layers, each layer of shielding cover body is formed by splicing and surrounding a plurality of shielding modules, and a plurality of assembling positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and the two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the underlying shielding cage, wherein: the shielding cover body is clung to the vertical surface of the equipment ring cavity of the suppression pool through the stopping component and the supporting component.

The shielding module is of a hollow structure, one or more shielding materials are filled in the shielding module, and the shielding materials are arranged in an embedded mode.

The shielding module is of a stainless steel cladding structure, and the welding line of the stainless steel cladding is a continuous full penetration welding line.

Wherein, the stainless steel ladle shell is provided with an opening for exhausting.

Wherein, the shielding modules are connected in a lap joint or oblique joint mode to ensure no leak.

The supporting component is a supporting plate, the supporting plate is welded with the vertical surface of the main equipment cavity of the suppression pool, and the stopping component provides an installation reference surface.

Wherein, the backstop component includes: a bottom stop block and a middle stop block, wherein: one end of the bottom stop block is connected with a structure, and the side surface of the bottom stop block is fastened on the vertical surface of the shielding module; the middle stop block is connected to the vertical surfaces of two adjacent shielding modules through the supporting member.

Wherein the top of the shielding device for compactly arranging the small stacks is fixed with the steel structure platform.

The shielding device for compactly arranging the small stacks has the following beneficial effects: a shielding device for compact arrangement of a mini-stack comprising: the method comprises the following steps: the reactor component shielding cover comprises a shielding cover body, wherein the shielding cover body is provided with a plurality of layers, each layer of shielding cover body is formed by splicing and surrounding a plurality of shielding modules, and a plurality of assembling positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and the two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the underlying shielding cage, wherein: the shielding cover body is tightly attached to the vertical surface of the equipment ring cavity of the suppression pool through the stop component and the supporting component, so that the modularized position division dismounting and mounting can be realized, the space is effectively utilized, and the in-service inspection of the main equipment is not influenced; the structure is simple, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.

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 shielding apparatus for compactly arranging a small stack according to an embodiment of the present invention.

FIG. 2 is a side schematic view of a shielding device for a compact arrangement of a small stack 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. 1-2, a first embodiment of the shielding device of the present invention for compact arrangement of small stacks is shown.

The shielding device 3 for compactly arranging the small-sized piles in the embodiment is arranged inwards along the equipment annular cavity of the suppression water pool, is tightly attached to the vertical surface of the annular cavity of the suppression water pool, and the top of the shielding device is fixed with the steel structure platform. The method specifically comprises the following steps: the shield cover 31 has a plurality of layers, i.e., upper and lower layers 31a and 31b in the present embodiment, and may have a plurality of layers in other embodiments. Each layer of shielding cover body 31 is formed by splicing and surrounding a plurality of shielding modules T, and a plurality of assembling positions 31c for placing reactor components are arranged on the shielding cover body 31; a supporting member 32 is arranged between the shielding cover bodies 31a and 31b of adjacent layers, and two opposite sides of the supporting member 32 are fastened on at least two adjacent shielding modules; and a stop member 33 secured to the support member 32 and/or the end of the underlying shielding cage, wherein: the shielding cage is held in contact with the vertical surface of the installation ring chamber of the suppression water basin by means of the stop elements 33 and the support elements 32.

The shielding cover body 31 is assembled in a modularized and regional manner, and the basic assembly unit is a shielding module T, so that a limited space is utilized. Meanwhile, the whole device is set to be detachable, and the in-service inspection of the main equipment is not influenced.

During specific implementation, the shielding module T is a hollow stainless steel shell structure, and a welding seam on the stainless steel shell is a continuous and full penetration welding seam. The shielding module T is filled with one or more shielding materials, wherein the shielding materials are in a mosaic arrangement. The shielding module T forms the shielding device 3 after being assembled, and has good self-stability. It can be understood that: the number of the shielding modules T and the splicing mode are not limited, and the shielding modules T can be overlapped or obliquely spliced according to the required shielding effect and the overall shape of the components such as the adapted pressure container and the like so as to ensure no leakage. Wherein: and a stainless steel ladle shell of the shielding module T is provided with an opening for exhausting.

Further, the supporting member 32 is disposed between the shielding cases 31a and 31b of adjacent layers, and the supporting member 32 in this embodiment is a supporting plate, and the supporting plate is welded to the vertical surface of the main equipment chamber of the suppression pool, and provides an installation reference surface for the stopper member 33.

Further, the stopper member 33 includes: a bottom stop block 331 and a middle stop block 332, wherein: one end of the bottom stop block 331 is connected to the structure, and the side surface thereof is fastened to the vertical surface of the shielding module T; the middle stop 332 is connected to the vertical faces of two adjacent shielding modules by the support member 32.

The shielding device 3 in the embodiment can reduce neutrons and photons scattered out of the reactor cabin, and reduce irradiation damage to equipment in the connected cabin section; the shielding device 3 can protect the safety of workers and maintainers in a power plant, reduce neutrons and photons leaked out of a reactor cabin, lighten the activation of materials outside a shielding case, reduce the activation source item in safety during shutdown, and more effectively reduce the weight of secondary shielding of the reactor so as to reduce the construction cost.

The implementation of the shielding device for compactly arranging small stacks of the invention has the following beneficial effects: a shielding device for compact arrangement of a mini-stack comprising: the method comprises the following steps: the reactor component shielding cover comprises a shielding cover body, wherein the shielding cover body is provided with a plurality of layers, each layer of shielding cover body is formed by splicing and surrounding a plurality of shielding modules, and a plurality of assembling positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and the two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the underlying shielding cage, wherein: the shielding cover body is tightly attached to the vertical surface of the equipment ring cavity of the suppression pool through the stop component and the supporting component, so that the modularized position division dismounting and mounting can be realized, the space is effectively utilized, and the in-service inspection of the main equipment is not influenced; the structure is simple, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.