JPS5932994U

JPS5932994U - shielding plug

Info

Publication number: JPS5932994U
Application number: JP1982128210U
Authority: JP
Inventors: 伊藤　重朗
Original assignee: 株式会社東芝
Priority date: 1982-08-25
Filing date: 1982-08-25
Publication date: 1984-02-29

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図および第２図は従来例を示す図で第１図はループ
形高速増殖炉の縦断面図、第２図は第１図の一部拡大図
、第３図および第４図は本考案の一実施例を示す図で第
３図はループ形高速増殖炉の縦断面図、第４図は第３図
の一部拡大図である。１０１・・・原子炉容器、１０１Ａ・・・原子炉容器の
上部開口、１０４・・・遮蔽プラグ、１０５・・・固定
プラグ、１０６・・・大回転プラグ、１０７・・・小回
転プラグ、１１３・・・シール桶、１１３Ａ・・・シー
ル桶の環状溝、１１６・・・仕切板、１１７・・・低融
点合金、１２４・・・溢流防止機構。Figures 1 and 2 show conventional examples. Figure 1 is a longitudinal cross-sectional view of a loop fast breeder reactor, Figure 2 is a partially enlarged view of Figure 1, and Figures 3 and 4 are from the book. FIG. 3 is a longitudinal sectional view of a loop-type fast breeder reactor, and FIG. 4 is a partially enlarged view of FIG. 3, showing an embodiment of the invention. 101... Reactor vessel, 101A... Upper opening of reactor vessel, 104... Shielding plug, 105... Fixed plug, 106... Large rotation plug, 107... Small rotation plug, 113. ... Seal tub, 113A... Annular groove of seal tub, 116... Partition plate, 117... Low melting point alloy, 124... Overflow prevention mechanism.

Claims

[Scope of utility model registration request]

(1) A fixed plug provided at the upper opening of the reactor vessel, a rotary plug rotatably provided in this fixed plug, and a lower part interposed at the fitting part of this rotary plug and the fixed plug. a seal tub having an annular groove for accommodating a low melting point alloy as a sealing material; a partition plate protruding from the rotating plug into the annular groove to partition the low melting point alloy in the annular groove; and an annular groove provided in the seal tub. A shielding plug comprising an overflow prevention mechanism that prevents a low melting point alloy contained therein from overflowing into a reactor vessel.

(2) The overflow prevention mechanism includes an annular reserve bucket provided above the inner annular portion of the seal bucket, an opening formed at the lower part of the outer peripheral side wall of the reserve bucket, and the inner peripheral side wall of the reserve bucket connected to the outer circumference. Registration of a utility model characterized in that the low-melting point alloy that overflows from the annular groove is returned to the annular groove through an opening in a reserve bucket that is erected higher than the side wall and whose upper part is inclined so as to cover the outer circumferential side wall. A shielding plug according to claim 1.