SYMPOSIA PAPER Published: 01 January 1989
STP10121S

Determination of Gamma-Ray-Induced Displacement Rates

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To define the gamma-ray component of the radiation field in light water reactor (LWR) pressure vessel (PV) environments, gamma-ray spectrometry experiments were conducted in the low power PV mockup at the poolside critical assembly (PCA) at the Oak Ridge National Laboratory (ORNL). Gamma-ray displacement rates can be calculated directly from absolute electron spectra observed with the Janus probe gamma-ray spectrometry. Gamma-ray displacement results are presented for the 1/4-T, 1/2-T, and 3/4-T locations of the 12/13 and 4/12 simulated surveillance capsule (SSC) configurations. In addition, the gamma-ray displacement rate at the SSC location was inferred using thermoluminescent dosimeter (TLD) gamma-ray dosimetry results obtained in the 4/12 SSC configuration at the PCA. Compared with neutron-induced displacement rates, the calculated gamma-ray-induced displacement rates are small at all these LWR-PV locations. The ratio of gamma-ray-induced to neutron-induced displacement rates never exceeds roughly 5 × 10 -3.

Author Information

Gold, R
Westinghouse Hanford Company, Hanford Engineering Development Laboratory, Richland, WA
Roberts, JH
), Richland, WA
Doran, DG
Westinghouse Hanford Company, Hanford Engineering Development Laboratory, Richland, WA
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Details
Developed by Committee: E10
Pages: 603–613
DOI: 10.1520/STP10121S
ISBN-EB: 978-0-8031-5069-0
ISBN-13: 978-0-8031-1184-4