发明名称 |
Method and apparatus for use to exchange O-ring interposed between in-core housing and in-core flange in nuclear reactor |
摘要 |
This invention concerns a method and apparatus for use to exchange an O-ring interposed between an in-core housing disposed at the lower end of a guide tube for an in-core monitor for monitoring the operation of a nuclear reactor and an in-core flange attached to the housing. The apparatus comprises a drain system adapted to be connected to the lower end of the flange for draining reactor water, a split cylindrical guide member adapted to be suspended from an upper grid located in a pressure vessel after removing the in-core monitor, an operating mechanism to be inserted into the guide member, the operating member being hung down from a platform of the reactor, and a tubular repairing tool secured to the lower portion of the operating mechanism, the repairing tool being provided with a valve member which is to be water-tightly engaged with a valve seat formed for the housing when the operating mechanism is lowered into the guide member.
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申请公布号 |
US4243484(A) |
申请公布日期 |
1981.01.06 |
申请号 |
US19780964667 |
申请日期 |
1978.11.29 |
申请人 |
TOKYO SHIBAURA DENKI KABUSHIKI KAISHA |
发明人 |
TSUJI, TERUAKI;WATANABE, SHIGERU |
分类号 |
G21C19/02;G21C13/028;G21C19/20;G21C19/26;(IPC1-7):G21C19/00 |
主分类号 |
G21C19/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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