阅读说明：本技术 海洋核动力平台反应堆压力容器支撑裙 (Ocean nuclear power flat reaction core pressure vessel supports skirt ) 是由 周梓丞 张晓辉 骆青松 唐宝强 周军城 于 2018-07-03 设计创作，主要内容包括：本发明涉及海洋核动力平台反应堆压力容器支撑裙,包括筒体,其特征是筒体为薄壁圆筒结构,筒体的上部设置有三个以上腰圆形排气孔,所述腰圆形排气孔的长、短轴分别位于垂直、水平方向,各腰圆形排气孔位于同一水平高度,腰圆形排气孔的中心线与筒体顶端的距离为350mm-450mm,筒体的下部设置有一个以上圆形人孔兼进水孔,各人孔兼进水孔位于同一水平高度,人孔兼进水孔的中心线与筒体底端的距离为300mm-600mm,筒体的上、下端面分别与反应堆压力容器和安全壳底板焊接。本发明结构简单、易于热量导出、能降低焊缝和甲板材料辐照劣化并延长使用寿命。(The present invention relates to ocean nuclear power flat reaction core pressure vessels to support skirt, including cylinder, it is characterized in that cylinder is thin-wall tubular structure, there are three the above kidney ellipsoid gas vents for the top setting of cylinder, the length of the kidney ellipsoid gas vent, short axle is located at vertically, horizontal direction, each kidney ellipsoid gas vent is located at same level height, the center line of kidney ellipsoid gas vent is 350mm-450mm at a distance from cylinder top, the lower part of cylinder is provided with more than one round manhole and inlet opening, each manhole and inlet opening are located at same level height, manhole and the center line of inlet opening are 300mm-600mm at a distance from cylinder bottom end, cylinder it is upper, it is welded respectively with reactor pressure vessel and containment bottom plate lower end surface.The configuration of the present invention is simple, be easy to heat derives, weld seam can be reduced and deck materials irradiation deteriorate and prolong the service life.)

1. ocean nuclear power flat reaction core pressure vessel supports skirt, including cylinder (1), it is characterised in that: cylinder (1) is thin-walled Cylindrical structure, the top setting of cylinder (1) there are three the above kidney ellipsoid gas vent (2), the length of the kidney ellipsoid gas vent (2), Short axle is located at vertical, horizontal direction, and each kidney ellipsoid gas vent (2) is located at same level height, kidney ellipsoid gas vent (2) Center line is 350mm-450mm at a distance from cylinder (1) top, and it is simultaneous that the lower part of cylinder (1) is provided with more than one round manhole Inlet opening (3), each manhole and inlet opening (3) are located at same level height, the center line and cylinder (1) of manhole and inlet opening (3) The distance of bottom end be 300mm-600mm, the upper and lower end face of cylinder (1) respectively with reactor pressure vessel (4) and containment bottom plate (5) it is welded to connect.

2. nuclear power flat reaction core pressure vessel in ocean according to claim 1 supports skirt, it is characterised in that: the cylinder Position corresponding with upper end weld seam is provided with shielding fastly (6) in body (1), the upper surface and reactor pressure vessel (4) of cylinder (1) Between be single face welding and double face shaping structure, be the outer groove of skirt between the lower end surface and containment bottom plate (5) of cylinder (1) greater than in skirt The asymmetric groove complete penetraction and fusion in welding structure of the bilateral of groove.

3. nuclear power flat reaction core pressure vessel in ocean according to claim 1 or 2 supports skirt, it is characterised in that: institute Stating kidney ellipsoid gas vent (2) is 12, and the circumferencial direction along cylinder (1) is evenly arranged, and the manhole and inlet opening (3) are 4, Circumferencial direction along cylinder (1) is evenly arranged.

4. nuclear power flat reaction core pressure vessel in ocean according to claim 3 supports skirt, it is characterised in that: described each The area of kidney ellipsoid gas vent (2) is 0.04m²-0.05m², the area of each manhole and inlet opening (3) is 0.16m²- 0.17m²。

5. nuclear power flat reaction core pressure vessel in ocean according to claim 1 or 2 supports skirt, it is characterised in that: institute Kidney ellipsoid gas vent (2) is stated by upper and lower two semi-circular through hole and connects their square through-hole and forms, described two half The diameter of circular through hole is equal and is equal to the side length of the square through-hole.

6. nuclear power flat reaction core pressure vessel in ocean according to claim 3 supports skirt, it is characterised in that: the waist Circular exhausting-gas hole (2) is by upper and lower two semi-circular through hole and connects their square through-hole and forms, described two semicircles The diameter of through-hole is equal and is equal to the side length of the square through-hole.

7. nuclear power flat reaction core pressure vessel in ocean according to claim 4 supports skirt, it is characterised in that: the waist Circular exhausting-gas hole (2) is by upper and lower two semi-circular through hole and connects their square through-hole and forms, described two semicircles The diameter of through-hole is equal and is equal to the side length of the square through-hole.

8. nuclear power flat reaction core pressure vessel in ocean according to claim 7 supports skirt, it is characterised in that: described two The side length of the diameter of a semi-circular through hole and the square through-hole is 200mm, the center line of the kidney ellipsoid gas vent (2) Be 350mm at a distance from cylinder (1) top, the diameter of the manhole and inlet opening (3) is 450mm, the manhole and inlet opening (3) center line is 525mm at a distance from cylinder (1) bottom end.

Technical field

The present invention relates to the carrying of reactor pressure vessel under marine environmental conditions and fixation, specifically ocean core is dynamic Power flat reaction core pressure vessel supports skirt.

Background technique

Reactor pressure vessel generallys use support construction to carry and fix, on the one hand support construction will carry reactor The load that the content and associated mechanisms of pressure vessel, structure are generated and transmitted, while limited reactions core pressure vessel also being wanted to exist Displacement in all directions.The reactor pressure vessel of existing nuclear power plant or nuclear facilities often mainly has circular ring shape branch with supporting form Two kinds of structure of bearing structure and support skirt (thin-walled cylinder).

The reactor pressure vessel of land based nuclear power plant or nuclear facilities generallys use circular ring shape supporting structure, and use state is such as Shown in Fig. 1: several adapter tube support pads are placed in the support groove of reactor pressure vessel bearing at reactor pressure vessel nozzle belt On interior movable plate, reactor pressure vessel bearing includes that several radial extent parts being welded in support ring are (or radial Key), radial key is embedded in the stop block being embedded in concrete, and circular ring shape supporting structure is integrally seated on concrete foundation and holds The supported all kinds of load passed over and the rotation and translation for limiting reactor pressure vessel.Ocean nuclear power platform and each It runs under class ocean floating nuclear facilities Yu Haiyang's environmental condition, is necessarily influenced by factors such as wind, waves, occurred often horizontal Incline, trim, rolling, pitching or the operating conditions such as hang down to, i.e. displacement on any direction will likely occur for reactor pressure vessel, above-mentioned Circular ring shape supporting structure is simply not proposed to marine environment.

The reactor pressure vessel bearing used under marine environment at present is that thin-walled cylinder supports skirt, use state As shown in Figure 2: thin-walled cylinder supports the upper and lower end of skirt to connect respectively with reactor pressure vessel nozzle belt flange and deck welding It connects.This structure type can with limited reactions core pressure vessel in any direction on displacement, be suitable for marine environment, but also It has the disadvantage that 1, since each component neutron irradiation integral dose of reactor is high, causes weld material to deteriorate, and then influence to make Use the service life；2, since support skirt is whole section of closing thin-walled cylinder, when core melt is piled up in bottom (head), heat can not be led in time Out, it possible burn through and reveals, to cause the accident；3, since support skirt is whole section of closing thin-walled cylinder, lower end weld seam when installation Can not back chipping, upper end weld seam is difficult to carry out non-destructive testing, and there are security risks；4, since support skirt is whole section of closing thin-wall circular Cylinder, insulating layer can only be installed on the outside of support skirt, and thermal loss is big, and cannot shield in support skirt to solve at installation heap bottom Certainly deck materials irradiate deterioration problem.

Therefore, design that structure is simple, be easy to heat derives, can reduce weld seam and deck materials irradiation deteriorates and extends makes It is very necessary with the ocean nuclear power flat reaction core pressure vessel support skirt in service life.

Summary of the invention

The object of the present invention is to provide a kind of structures simply, be easy to heat derives, can reduce weld seam and deck materials irradiation The ocean nuclear power flat reaction core pressure vessel support skirt for deteriorating and prolonging the service life.

To achieve the above object, the present invention adopts the following technical scheme: ocean nuclear power flat reaction core pressure vessel branch Skirt, including cylinder are supportted, it is characterized in that cylinder is thin-wall tubular structure, there are three the above kidney ellipsoids to be vented for the top setting of cylinder Hole, the long and short axis of the kidney ellipsoid gas vent are located at vertical, horizontal direction, and each kidney ellipsoid gas vent is located at same level Highly, the center line of kidney ellipsoid gas vent at a distance from cylinder top be 350mm-450mm, the lower part of cylinder be provided with one with Upper circle manhole and inlet opening, each manhole and inlet opening are located at the center line and cylinder of same level height, manhole and inlet opening The distance of bottom end is 300mm-600mm, and the upper and lower end face of cylinder is welded with reactor pressure vessel and containment bottom plate respectively.

Further, position corresponding with upper end weld seam is provided with shielding slab in the cylinder, the upper surface of cylinder with instead It answers for single face welding and double face shaping structure between core pressure vessel, it is big for the outer groove of skirt between the lower end surface and containment bottom plate of cylinder In the asymmetric groove complete penetraction and fusion in welding structure of the bilateral of skirt internal groove.

Further, the kidney ellipsoid gas vent be 12, the circumferencial direction along cylinder is evenly arranged, the manhole and into Water hole is 4, and the circumferencial direction along cylinder is evenly arranged.

Further, the area of each kidney ellipsoid gas vent is 0.04m²-0.05m², each manhole and inlet opening Area be 0.16m²-0.17m²。

Further, the kidney ellipsoid gas vent by upper and lower two semi-circular through hole and connects their square and leads to Hole composition, the diameter of described two semi-circular through hole is equal and is equal to the side length of the square through-hole.

Further, the side length of the diameter of described two semi-circular through hole and the square through-hole is 200mm, described The center line of kidney ellipsoid gas vent is 350mm at a distance from cylinder top, and the diameter of the manhole and inlet opening is 450mm, institute The center line for stating manhole and inlet opening is 525mm at a distance from cylinder bottom end.

Stainless steel shielding slab is arranged close to core region side in back of weld in the present invention, reduces after weld material irradiated Degradation, improve the mechanical property after material is irradiated, improve support skirt connection reliability.The present invention is in cylinder Upper and lower parts kidney ellipsoid gas vent and round manhole and inlet opening is respectively set, in the premise for not influencing cylinder mechanical strength Under, by the Natural Circulation of lower water inlet, upper exhaust, it can take away in time and be piled up in heat caused by the core melt of bottom (head) Amount, to ensure the safety contained in core melt heap under major accident.In addition, since the present invention is in the appropriate position of cylinder It sets and offers gas vent and round manhole and inlet opening, therefore, can meet in codes and standards to the installation of support skirt and inservice inspection Regulation, welding, non-destructive detecting device and personnel can operate critical welding seams, realize lower end soldering seam grinding and upper end weldering Non-destructive testing is stitched, to reduce security risk.Using the present invention, moreover it is possible to which the shielding of installation heap bottom is in support skirt to solve deck materials Irradiate deterioration problem.The configuration of the present invention is simple is easy to heat derives, can reduce weld seam and deck materials irradiation deteriorates and extends and make Use the service life.

Detailed description of the invention

Fig. 1 is the circular ring shape supporting structure use state diagram of land based nuclear power plant reactor pressure vessel；

Fig. 2 is the thin-walled cylinder support skirt use state diagram of reactor pressure vessel under marine environment；

Fig. 3 is structural schematic diagram of the invention；

Fig. 4 is use state diagram of the present invention；

Fig. 5 is single face welding and double face shaping structural schematic diagram of the invention；

Fig. 6 is the asymmetric groove complete penetraction and fusion in welding structural schematic diagram of bilateral of the invention；

Fig. 7 is the kidney ellipsoid vent structure schematic diagram of one embodiment of the invention；

Fig. 8 is the round manhole and inlet opening structural schematic diagram of one embodiment of the invention.

In figure: 1- cylinder；2- kidney ellipsoid gas vent；3- circle manhole and inlet opening；4- reactor pressure vessel；5- safety Shell bottom plate；6-shielding slabs.

Specific embodiment

The present invention is further illustrated with reference to the accompanying drawings and embodiments, but the embodiment should not be construed as to this hair Bright limitation.

Ocean nuclear power flat reaction core pressure vessel as shown in the figure supports skirt, including cylinder 1, and cylinder 1 is thin-wall circular Barrel structure, there are three the above kidney ellipsoid gas vent 2, the long and short axis of the kidney ellipsoid gas vent 2 is distinguished for the top setting of cylinder 1 Positioned at vertical, horizontal direction, each kidney ellipsoid gas vent 2 is located at same level height, the center line and cylinder of kidney ellipsoid gas vent 2 The distance on 1 top is 350mm-450mm, and the lower part of cylinder 1 is provided with more than one round manhole and inlet opening 3, each manhole are simultaneous Inlet opening 3 is located at same level height, and the center line of manhole and inlet opening 3 is 300mm-600mm at a distance from 1 bottom end of cylinder, The upper and lower end face of cylinder 1 is welded to connect with reactor pressure vessel 4 and containment bottom plate 5 respectively.

Preferred embodiment is: in the above scheme, position corresponding with upper end weld seam is provided with shielding in the cylinder 1 Fast 6, it is single face welding and double face shaping structure, the lower end surface of cylinder 1 and peace between the upper surface and reactor pressure vessel 4 of cylinder 1 It is greater than the asymmetric groove complete penetraction and fusion in welding structure of bilateral of skirt internal groove between full shell bottom plate 5 for the outer groove of skirt.

Preferred embodiment is: in the above scheme, the kidney ellipsoid gas vent 2 is 12, along the circumferencial direction of cylinder 1 It is evenly arranged, the manhole and inlet opening 3 are 4, and the circumferencial direction along cylinder 1 is evenly arranged.

Preferred embodiment is: in the above scheme, the area of each kidney ellipsoid gas vent 2 is 0.048m², described The center line of the kidney ellipsoid gas vent 2 of each kidney ellipsoid gas vent 2 at a distance from 1 top of cylinder be 350mm, each manhole and into The area in water hole 3 is 0.16m²。

Preferred embodiment is: in the above scheme, the kidney ellipsoid gas vent 2 by upper and lower two semi-circular through hole with And connect they square through-hole composition, the diameter of described two semi-circular through hole it is equal and be equal to the square through-hole Side length.

Preferred embodiment is: in the above scheme, the diameter of described two semi-circular through hole and the square through-hole Side length be 200mm, the center line of the kidney ellipsoid gas vent 2 is 350mm at a distance from 1 top of cylinder, and the manhole is simultaneous The diameter of inlet opening 3 is 450mm, and the center line of the manhole and inlet opening 3 is 525mm with 1 bottom end of cylinder at a distance from.

The content being not described in detail in this specification, belongs to that well known to a person skilled in the art the prior arts.