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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]
  1. Los Alamos, NM
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
865323
Patent Number(s):
US 4497769
Assignee:
United States of America as represented by United States (Washington, DC)
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. 1985. "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 = {},
url = {https://www.osti.gov/biblio/865323}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}