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A Sheath Breach Detector For Use in Fixed In-Vessel Instrumentation Assemblies

A SHEATH BREACH DETECTOR FOR USE IN FIXED IN-VESSEL INSTRUMENTATION ASSEMBLIES

The intent of the paper is to introduce a simple and economical detector capable of monitoring the hermetic integrity of an in-vessel detector assembly's outer sheath. Presently, utilities have no means to inspect the outer sheaths of installed assemblies for cracks, fissures or separations. The sheath breach detector provides an early warning signal that an assembly sheath's pressure bearing integrity has been compromised.


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