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Title: Portable instrument for inspecting irradiated nuclear fuel assemblies

Abstract

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.

Inventors:
 [1];  [1];  [1];  [2]
  1. (Los Alamos, NM)
  2. (Santa Fe, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865323
Patent Number(s):
4497769
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
portable; instrument; inspecting; irradiated; nuclear; fuel; assemblies; measuring; induced; cerenkov; radiation; associated; water-filled; storage; pond; disclosed; photomultiplier; tube; image; intensifier; operable; parallel; simultaneously; means; field; lens; assembly; beam; splitter; permits; operator; aim; focus; apparatus; submerged; aimed; focused; illumination; reading; obtained; cap; carbon-14; phosphor; light; source; calibrating; portable instrument; image intensifier; lens assembly; irradiated nuclear; fuel assemblies; beam splitter; light source; nuclear fuel; fuel assembly; photomultiplier tube; cerenkov radiation; storage pond; field lens; multiplier tube; /376/250/976/

Citation Formats

Nicholson, Nicholas, Dowdy, Edward J., Holt, David M., and Stump, Jr., Charles J. Portable instrument for inspecting irradiated nuclear fuel assemblies. United States: N. p., 1985. Web.
Nicholson, Nicholas, Dowdy, Edward J., Holt, David M., & Stump, Jr., Charles J. Portable instrument for inspecting irradiated nuclear fuel assemblies. United States.
Nicholson, Nicholas, Dowdy, Edward J., Holt, David M., and Stump, Jr., Charles J. Tue . "Portable instrument for inspecting irradiated nuclear fuel assemblies". United States. https://www.osti.gov/servlets/purl/865323.
@article{osti_865323,
title = {Portable instrument for inspecting irradiated nuclear fuel assemblies},
author = {Nicholson, Nicholas and Dowdy, Edward J. and Holt, David M. and Stump, Jr., Charles J.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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