Tube lane pivoting device for nuclear steam generator with superposed elements
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United States of America Patent
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Jun 25, 1996
Grant Date -
N/A
app pub date -
Oct 11, 1994
filing date -
Oct 8, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Tube lane blocking is accomplished by a plurality of removable blocks which can be fitted and extracted from the central region, in the inner casing of the steam generator. The blocks are superposed in a stack resting on the tube plate, and are immobilized at their ends by a holding fixture. An anti-liftoff blocking member at opposite ends of the blocks prevents them from being lifted off the tube plate. When maintenance or repair of the tube plate is required, the holding fixture and anti-liftoff blocking member can be withdrawn in order to permit access to the tube plate and the adjacent tube bundle.
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