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Nuclear reactor pressure vessel top cover and installation method thereof

A pressure vessel and nuclear reactor technology, applied in the field of nuclear power, can solve problems such as welding deformation and large residual stress, and achieve the effects of eliminating structural deformation, reducing welding filling, and wide applicability

Active Publication Date: 2018-07-20
中广核工程有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a nuclear reactor pressure vessel top cover and its installation method to solve the problems of welding deformation and residual stress in the prior art, and to eliminate the structural deformation caused by welding in the connection area between the penetrating piece and the head

Method used

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  • Nuclear reactor pressure vessel top cover and installation method thereof
  • Nuclear reactor pressure vessel top cover and installation method thereof
  • Nuclear reactor pressure vessel top cover and installation method thereof

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Embodiment Construction

[0034] In order to make the purpose of the invention, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0035] Please refer to image 3 and Figure 4 As shown, the nuclear reactor pressure vessel top cover of the present invention includes: a head 20, the head 20 is provided with a through hole (not marked) and a boss 22 arranged around the through hole, and the boss 22 is provided with a horizontal platform at the end away from the head 20 23; and a penetrating piece 24, the penetrating piece 24 is accommodated in the through hole, the penetrating piece 24 is provided with a flange 26 corresponding to the horizontal pla...

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Abstract

The invention discloses a nuclear reactor pressure vessel cap, comprising: a sealing head provided with a through hole and a boss arranged around the through hole, wherein one end, far away from the sealing head, of the boss is provided with a horizontal platform; and a penetrating part received in the through hole and provided with a flange corresponding to the horizontal platform, wherein a gap between the horizontal platform and the flange is filled with a seam. Compared with the prior art, the nuclear reactor pressure vessel cap can be arranged anywhere on the inner surface of the sealing head with no influence from the structure of the sealing head and the position of the penetrating part, and the nuclear reactor pressure vessel cap is widely applicable; a traditional asymmetric J-shaped seam is turned into an annular seam for the nuclear reactor pressure vessel cap, welding filling quantity is greatly reduced, and the previous problem of excessive welding deformation and residual stress is solved; in addition, the invention also provides a mounting method of the nuclear reactor pressure vessel cap.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to a nuclear reactor pressure vessel top cover and an installation method thereof. Background technique [0002] In the operation of nuclear power plants, it is necessary to open several through holes in the top cover of the reactor pressure vessel to pass through the measuring instrument (instrument socket) and the reactor control component (CRDM socket). In order to realize this function, it is necessary to set up a tubular penetrating piece to connect with the corresponding opening on the head, so as to accommodate related control instruments or components, and at the same time play the role of a pressure-bearing boundary. [0003] Due to the large difference between the thickness of the head of the pressure vessel and the wall thickness of the penetration, it is impossible to set a full penetration groove on the top cover. Therefore, on typi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C13/073G21C13/036
CPCG21C13/036G21C13/073Y02E30/30
Inventor 刘刚冉小兵刘东杰刘言午杨景超许洪朋胡大芬王春发周万云陈莲
Owner 中广核工程有限公司
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