Device for closing a drive casing pipe
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Aug 9, 2013
filing date -
Sep 19, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a device for closing a pipe opening, opening upwards, of a drive casing pipe accommodating the control rod drive of a boiling water reactor, said device comprising a closure plug with a plug housing, opening downwards, a sealing element guided axially so as to be movable within the plug housing, which element has a sealing face providing a sealing contact with an annular counter face defining the pipe opening, a locking element provided to fix the plug housing on the drive casing pipe, and a spring, which is supported by the upper end thereof on the plug housing and by the lower end thereof on the sealing element and holds said element in a lower end position.
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