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Optical Engineering

Measurement of nuclear reactor local heat rates by optical fiber infrared emission
Author(s): Fredrik B. H. Jensen; Tsunemi Kakuta; Tatsuo Shikama
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Paper Abstract

Gamma thermometers have been in routine use in nuclear power plants for power distribution monitoring for more than 35 years. These instruments depend upon the heating of a metal block by gamma rays. The generated heat is proportional to the specific power of nearby fuel rods. Usually heat is allowed to escape to a sink through a controlled heat path and the temperature drop is measured by thermocouples. If the heat sink is at a known temperature, a single thermocouple may be employed to measure the temperature of the metal block.

Paper Details

Date Published: 1 August 1997
PDF: 3 pages
Opt. Eng. 36(8) doi: 10.1117/1.601424
Published in: Optical Engineering Volume 36, Issue 8
Show Author Affiliations
Fredrik B. H. Jensen, Univ. of Tokyo (Switzerland)
Tsunemi Kakuta, Japan Atomic Energy Research Institute Tokai (Japan)
Tatsuo Shikama, Tohoku Univ. (Japan)


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