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U.S. Department of Energy
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Helium production measurements for neutron dosimetry and damage correlations

Conference ·
OSTI ID:6670086
Helium accumulation fluence monitors (HAFM's), consisting of miniature vanadium capsules containing small, accurately-known amounts of /sup 10/B or /sup 6/Li, are being used routinely for neutron dosimetry measurements in breeder reactor environments. Additionally, solid wires of Al, Fe and Cu have been irradiated by 14.8-MeV neutrons from the d-T reaction, and measurements of the helium production along these wires have given detailed neutron fluence profiles. Additional materials with relatively high (n,..cap alpha..) cross sections are being tested in a wide variety of neutron environments to select HAFM sets that will provide spectral information by unfolding techniques. The mass spectrometric helium measurement technique has been demonstrated to produce results with better than 2% (1 sigma) absolute accuracy. Intercomparisons with other laboratories have demonstrated good correlations with radiometric and fission chamber dosimetry results.
Research Organization:
Atomics International Div., Canoga Park, CA (USA); Hanford Engineering Development Lab., Richland, WA (USA)
DOE Contract Number:
EY-76-C-14-2170
OSTI ID:
6670086
Report Number(s):
HEDL-SA-1309; CONF-771036-16
Country of Publication:
United States
Language:
English