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Title: Portable instrument for inspecting irradiated nuclear fuel assemblies

A portable instrument for measuring induced Cerenkov radiation associated with irradiated nuclear fuel assemblies in a water-filled storage pond is disclosed. The instrument includes a photomultiplier tube and an image intensifier which are operable in parallel and simultaneously by means of a field lens assembly and an associated beam splitter. The image intensifier permits an operator to aim and focus the apparatus on a submerged fuel assembly. Once the instrument is aimed and focused, an illumination reading can be obtained with the photomultiplier tube. The instrument includes a lens cap with a carbon-14/phosphor light source for calibrating the apparatus in the field.
Authors:
 [1] ;  [1] ;  [1] ;  [2]
  1. (Los Alamos, NM)
  2. (Santa Fe, NM)
Publication Date:
OSTI Identifier:
865323
Report Number(s):
US 4497769
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
portable; instrument; inspecting; irradiated; nuclear; fuel; assemblies; portable; instrument; measuring; induced; cerenkov; radiation; associated; irradiated; nuclear; fuel; assemblies; water-filled; storage; pond; disclosed; instrument; photomultiplier; tube; image; intensifier; operable; parallel; simultaneously; means; field; lens; assembly; associated; beam; splitter; image; intensifier; permits; operator; aim; focus; apparatus; submerged; fuel; assembly; instrument; aimed; focused; illumination; reading; obtained; photomultiplier; tube; instrument; lens; cap; carbon-14; phosphor; light; source; calibrating; apparatus; field; portable instrument; portable instrument; image intensifier; image intensifier; lens assembly; irradiated nuclear; irradiated nuclear; fuel assemblies; fuel assemblies; beam splitter; light source; nuclear fuel; nuclear fuel; fuel assembly; photomultiplier tube; photomultiplier tube; cerenkov radiation; storage pond; field lens; multiplier tube; multiplier tube /376/250/976/