Remotely installed fuel transfer tube closure system
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United States of America Patent
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Jun 20, 2017
Grant Date -
Mar 12, 2015
app pub date -
Jun 17, 2014
filing date -
Jun 17, 2013
priority date (Note) -
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Abstract
A system, method and apparatus for remotely installing a flange cover assembly on a fuel transfer tube fixed flange in a containment pit in a nuclear power plant is presented. In one example, the flange cover assembly includes J-bolt spring assemblies in which the feet of the J-bolt are rotated between a clamping and non-clamping orientation to engage with the rear face of the fixed flange. A tool frame is lowered into the containment pit to engage with the flange cover assembly to compress the J-bolt springs and extend the J-bolt foot toward and away from the flange cover. Dual acting cylinders move a spring compression frame on the frame tool to compress and relax the J-bolt spring assemblies.
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