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Title: Optical gamma thermometer

Abstract

An optical gamma thermometer includes a metal mass having a temperature proportional to a gamma flux within a core of a nuclear reactor, and an optical fiber cable for measuring the temperature of the heated metal mass. The temperature of the heated mass may be measured by using one or more fiber grating structures and/or by using scattering techniques, such as Raman, Brillouin, and the like. The optical gamma thermometer may be used in conjunction with a conventional reactor heat balance to calibrate the local power range monitors over their useful in-service life. The optical gamma thermometer occupies much less space within the in-core instrument tube and costs much less than the conventional gamma thermometer.

Inventors:
; ;
Issue Date:
Research Org.:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1089396
Patent Number(s):
8503599
Application Number:
12/259,931
Assignee:
General Electric Company (Niskayuna, NY)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01K - MEASURING TEMPERATURE
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
DOE Contract Number:  
FC07-07ID14778
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Koster, Glen Peter, Xia, Hua, and Lee, Boon Kwee. Optical gamma thermometer. United States: N. p., 2013. Web.
Koster, Glen Peter, Xia, Hua, & Lee, Boon Kwee. Optical gamma thermometer. United States.
Koster, Glen Peter, Xia, Hua, and Lee, Boon Kwee. Tue . "Optical gamma thermometer". United States. https://www.osti.gov/servlets/purl/1089396.
@article{osti_1089396,
title = {Optical gamma thermometer},
author = {Koster, Glen Peter and Xia, Hua and Lee, Boon Kwee},
abstractNote = {An optical gamma thermometer includes a metal mass having a temperature proportional to a gamma flux within a core of a nuclear reactor, and an optical fiber cable for measuring the temperature of the heated metal mass. The temperature of the heated mass may be measured by using one or more fiber grating structures and/or by using scattering techniques, such as Raman, Brillouin, and the like. The optical gamma thermometer may be used in conjunction with a conventional reactor heat balance to calibrate the local power range monitors over their useful in-service life. The optical gamma thermometer occupies much less space within the in-core instrument tube and costs much less than the conventional gamma thermometer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 06 00:00:00 EDT 2013},
month = {Tue Aug 06 00:00:00 EDT 2013}
}

Works referenced in this record:

Fiber optic sensor for detecting multiple parameters in a harsh environment
patent, February 2008


Fiber optic sensor technology: an overview
journal, May 2000


Randomly sampled apodization in Bragg gratings
journal, April 2006


Measurement of nuclear reactor local heat rates by optical fiber infrared emission
journal, August 1997


Fixed in-core calibration devices for BWR flux monitors
patent, May 1991