JPS5857792U

JPS5857792U - nuclear fuel assembly

Info

Publication number: JPS5857792U
Application number: JP1981147774U
Authority: JP
Inventors: 小村　清一
Original assignee: 株式会社東芝
Priority date: 1981-10-06
Filing date: 1981-10-06
Publication date: 1983-04-19

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の核燃料集合体の一部断面斜視図、第２図
は第１図に示す核燃料集合体の拡大平面図、第３図、第
４図は第呻り、結介燃２４畔１ａの要部拡大図、第５図
は第４図の要部平面図、゛′第６図はこの考案に＋る核
燃料集合体の、結合燃料棒の正面１“・・・燃料棒、ｌ
ａ、２１・・・結合燃料棒、２・・・上、部タイプレー
ト、３．２６・・・下部タイプレート、４・・・スペー
サ、５・・・燃料チャン、ネル、２２・・・下部端栓、
２３．３０・・・テーパ部、２４．２９・・・円筒部、
２５．３１・・・すり割溝、２８・・・上部端栓、３３
・・・圧縮コイルばね。　、Fig. 1 is a partial cross-sectional perspective view of a conventional nuclear fuel assembly, Fig. 2 is an enlarged plan view of the nuclear fuel assembly shown in Fig. 1, and Figs. 1a is an enlarged view of the main part, FIG. 5 is a plan view of the main part of FIG.
a, 21... Combined fuel rod, 2... Upper, lower tie plate, 3.26... Lower tie plate, 4... Spacer, 5... Fuel channel, flannel, 22... Lower part. end plug,
23.30...Tapered part, 24.29...Cylindrical part,
25.31... Slit groove, 28... Upper end plug, 33
...Compression coil spring. ,

Claims

[Scope of utility model registration request]

A large number of oval rods each having an upper end plug and a lower end plug fixed to the upper end and one or more water rods are attached to both upper and lower ends through the upper end plug and the lower end plug. are supported in an upright and parallel alignment by an upper tie plate and a lower tie plate, respectively, with their longitudinal intermediate portions sandwiching the fuel rods and the Talorad's longitudinal intermediate portions being spaced apart from each other in the longitudinal direction of the water rods. Multiple lattice-like spaces arranged! In a nuclear fuel assembly which is aligned and supported vertically and parallel to each other and whose outer side is covered with a fuel channel, a plurality of fuel rods forming a combined fuel rod connecting the upper tie plate and the lower tie plate are provided. The upper end portion of the upper end plug of the fuel rod, the lower end portion of the end plug, and the lower end portion of the upper end plug are adjacent to and integral with the lower end portion of the fuel rod. The outer diameter is formed to be elastically compressible by having slot grooves along the length direction at a plurality of locations, and the upper tie plate and the lower tie plate are bent by <, tp, 4 degrees, and the taper is inserted through the cylindrical portion. 1. A nuclear fuel assembly having four compliant holes and a compression spring that presses the upper tie plate against the tapered lower end surface of the upper end plug of the front end fuel rod. ,stomach