METHOD FOR IN-CORE INSTRUMENTATION WITHDRAWAL FROM THE CORE OF A PRESSURIZED WATER REACTOR

METHOD FOR IN-CORE INSTRUMENTATION WITHDRAWAL FROM THE CORE OF A PRESSURIZED WATER REACTOR

A method of removing the upper internals assembly from a nuclear reactor pressure vessel for refueling that simultaneously disconnects two or more of the in-core instrument thimble assemblies from the reactor vessel penetrations through which their signal cables extend. The signal cables are connect...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: POMIRLEANU, Radu O, HARKNESS, Alexander W
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Beschreibung
Zusammenfassung:A method of removing the upper internals assembly from a nuclear reactor pressure vessel for refueling that simultaneously disconnects two or more of the in-core instrument thimble assemblies from the reactor vessel penetrations through which their signal cables extend. The signal cables are connected to the penetrations with an electrical connector that supports the two or more in-core instrumentation thimble assembly signal leads. Before the electrical connector is disconnected, water in the vessel is lowered below the connection so that the process is performed in a dry environment.