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Fuel assembly positioning grillwork, fuel assembly and reactor core

A fuel assembly and positioning grid technology, which is applied in the direction of reactor fuel elements, fuel element assembly, reactors, etc., can solve problems such as easy cracks, achieve the effects of eliminating gaps, reducing bending risks, and improving reliability

Active Publication Date: 2021-09-28
CHINA NUCLEAR POWER TECH RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide a fuel assembly positioning grid, a fuel assembly and a core for the problem that the SiC composite cladding on the nuclear fuel using the SiC composite cladding is prone to cracks.

Method used

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  • Fuel assembly positioning grillwork, fuel assembly and reactor core
  • Fuel assembly positioning grillwork, fuel assembly and reactor core
  • Fuel assembly positioning grillwork, fuel assembly and reactor core

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Embodiment Construction

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0033] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counte...

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Abstract

The invention relates to a fuel assembly positioning grillwork, a fuel assembly and a reactor core, the fuel assembly positioning grillwork comprises: fuel rod positioning grids; interlocking assemblies which are arranged on the outer strips of the fuel rod positioning grids wherein the adjacent fuel rod positioning grids can be mutually locked through the interlocking assemblies. According to the scheme provided by the invention, after the fuel assemblies are arranged in the reactor core, the bulges on the fuel assembly positioning grillwork on each fuel assembly are matched with the grooves in the fuel assembly positioning grillwork on the adjacent fuel assembly so that the adjacent fuel assemblies can be mutually locked and positioned through the structure; therefore, the fuel assemblies in the whole reactor core are interlocked into a whole, the transverse bending rigidity of the whole structure is obviously higher than that of a single fuel assembly, and the possibility that the SiC composite cladding cracks due to bending can be effectively reduced by applying the fuel rod based on the SiC composite cladding on the basis of the structure.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel, in particular to a fuel assembly positioning grid, a fuel assembly and a core. Background technique [0002] The traditional fuel assembly consists of a rigid frame and fuel rods. The rigid frame includes a stirring grid, an upper tube base, a lower tube base and a guide tube. The mixing grid is composed of regularly arranged cells for accommodating and holding fuel rods. Composition; the guide tube is longer than the fuel rods, it protrudes from the end of the fuel rod bundle, and is fixed on the upper tube base and the lower tube base; the lower tube base is located at the lower part of the fuel assembly, and the lower tube base has some supporting legs and a The matching plate, which has some holes for fixing the guide tube and the coolant flow channel penetrates the matching plate; the other end of the fuel assembly, that is, the upper tube seat at the upper end of the fuel assembly, inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/34G21C3/332G21C3/32
CPCG21C3/34G21C3/332G21C3/32Y02E30/30
Inventor 卢志威谢亦然温建
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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