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Title: Threshold self-powered gamma detector for use as a monitor of power in a nuclear reactor

A self-powered gamma monitor for placement near the core of a nuclear reactor comprises a lead prism surrounded by a coaxial thin nickel sheet, the combination forming a collector. A coaxial polyethylene electron barrier encloses the collector and is separated from the nickel sheet by a vacuum region. The electron barrier is enclosed by a coaxial stainless steel emitter which, in turn, is enclosed within a lead casing. When the detector is placed in a flux of gamma rays, a measure of the current flow in an external circuit between emitter and collector provides a measure of the power level of the reactor.
Authors:
 [1] ;  [2]
  1. (Chicago, IL)
  2. (Darien, IL)
Publication Date:
OSTI Identifier:
863094
Report Number(s):
US 4091288
Resource Type:
Patent
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
threshold; self-powered; gamma; detector; monitor; power; nuclear; reactor; placement; near; core; comprises; lead; prism; surrounded; coaxial; nickel; sheet; combination; forming; collector; polyethylene; electron; barrier; encloses; separated; vacuum; region; enclosed; stainless; steel; emitter; casing; placed; flux; rays; measure; current; flow; external; circuit; provides; level; external circuit; gamma rays; gamma ray; power level; nuclear reactor; stainless steel; current flow; reactor comprises; self-powered gamma; vacuum region; gamma detector; /250/