Lower pipe seat and bottom device of light-water reactor nuclear fuel assembly

A technology for nuclear fuel assemblies and bottom devices, which is applied in the assembly of fuel elements, nuclear power generation, and reduction of greenhouse gases to achieve the effect of improving performance

Active Publication Date: 2013-01-09
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the lower tube base

Method used

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  • Lower pipe seat and bottom device of light-water reactor nuclear fuel assembly
  • Lower pipe seat and bottom device of light-water reactor nuclear fuel assembly
  • Lower pipe seat and bottom device of light-water reactor nuclear fuel assembly

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.

[0025] figure 1 A light water reactor nuclear fuel assembly 1 in some embodiments of the present invention is shown. The fuel assembly 1 includes a bottom device 10 , an upper device 20 , several guide tubes 30 , several grids 40 and several fuel rods 50 . The guide pipe 30 is vertically arranged, and its two ends are respectively fixed in the bottom device 10 and the upper device 20 , the bottom device 10 is for cooling water to enter the fuel assembly 1 , and the upper device 20 is for cooling water to come out of the fuel assembly 1 . The grids 40 are arranged transversely and are fixed at intervals along the length direction of the guide tube 30 . The grid 40 has several grids (not shown in the figure), and the fuel rods 50 are respectively passed through the corresponding grids. The fuel assembly 1 is placed vertically when in use,...

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Abstract

The invention provides a lower pipe seat of a light-water reactor nuclear fuel assembly. The lower pipe seat comprises a frame body, a plurality of first main ribs, a plurality of second main ribs, and a plurality of pipe fitting installation parts, wherein the first main ribs are arranged in the frame body in parallel at intervals, the second main ribs are arranged in the frame body in parallel at intervals, the frame body comprises a first diagonal line and a second diagonal line which is intersected with the first diagonal line, a plurality of first main ribs and/or a plurality of second main ribs are parallel to the first diagonal line and/or the second diagonal line, a plurality of first main ribs and a plurality of second main ribs are intersected to divide the interior of the frame body into a plurality of through drain holes; and a plurality of pipe fitting installation parts are respectively arranged at positions where a plurality of first main ribs and a plurality of second main ribs are intersected. The invention further provides a bottom device of the light-water reactor nuclear fuel assembly. According to the lower pipe seat, a plurality of first main ribs and/or a plurality of second main ribs are parallel to the first diagonal line and/or the second diagonal line respectively, so that the performance of the lower pipe seat can be effectively prompted.

Description

technical field [0001] The invention relates to a light water reactor, in particular to a lower pipe seat and a bottom device of a light water reactor nuclear fuel assembly. Background technique [0002] A light water reactor consists of a core consisting of a number of prismatic fuel assemblies arranged side by side in a vertical position. The fuel assembly comprises a framework consisting of longitudinal ducts and grids and secured by two header means, within which fuel rods are seated. One of the fuel assembly's two header assemblies, known as the bottom assembly, sits on the lower core plate, which has holes drilled at the location of each fuel assembly to allow the reactor's cooling water to flow vertically upwards through the core. With long-term operation, some large foreign objects such as screws, nuts, and metal cuttings are easily mixed into the cooling water. If these foreign objects enter the fuel assembly, they will easily cause abrasion to the fuel rods drive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/32
CPCY02E30/40Y02E30/30
Inventor 李伟才周跃民刘雨利郭严庞铮铮
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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