Testing of a prototype PWR design gamma thermometer for use as a local power monitor in the thimble tube of a nuclear reactor

Conference · Wed Feb 01 00:00:00 EST 1984 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:7122621

LeVert, F E; Bell, D L; Kress, R L

Out-of-pile tests were performed on a 0.185-in. OD gamma thermometer (GT) designed for insertion in existing thimble tubes of W pressurized water reactors (PWR). The experimental measurements were conducted with the GT inserted in a simulated thimble tube. The measurements were performed to examine the effect on the sensitivity, response time, and repeatability of the GT output signal when surrounded by an air- and a water-filled thimble tube with random and controlled physical contact between the two units. The results showed that the linearity of the instrument is not affected when operated in an airor water-filled thimble tube. However, the response time of the GT to a step change in power increased from 9 s to about 30 s for water and dry thimble tube conditions respectively. Results are also presented which show that the sensitivity, mV/W/cm/sup 3/, of the GT with and without controlled physical contact between the inner surface of the simulated thimble tube and the outer surface of the GT did not vary significantly.

• Research Organization: Technology for Energy Corporation One Energy Center, Pellissippi Parkway Knoxville, Tennessee 37922
• OSTI ID: 7122621
• Report Number(s): CONF-831015-; TRN: 84-011331
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Vol. 31:1; Conference: Nuclear science symposium, San Francisco, CA, USA, 19 Oct 1983
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
IN CORE INSTRUMENTS
THERMOMETERS
POWER COEFFICIENT
MONITORING
PWR TYPE REACTORS
PERFORMANCE TESTING
AIR
EXPERIMENTAL DATA
GAMMA DETECTION
RESPONSE FUNCTIONS
SENSITIVITY
SIGNALS
SIMULATION
TIMING PROPERTIES
TUBES
WATER
DATA
DETECTION
FLUIDS
FUNCTIONS
GASES
HYDROGEN COMPOUNDS
INFORMATION
MEASURING INSTRUMENTS
NUMERICAL DATA
OXYGEN COMPOUNDS
RADIATION DETECTION
REACTIVITY COEFFICIENTS
REACTOR INSTRUMENTATION
REACTORS
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
220400* - Nuclear Reactor Technology- Control Systems
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments