Nuclear accident dosimetry intercomparison studies

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Health Physics; (USA)

DOI:https://doi.org/10.1097/00004032-198909000-00010· OSTI ID:5406481

Sims, C S ^[1]

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1. Oak Ridge National Lab., TN (USA)

Twenty-two nuclear accident dosimetry intercomparison studies utilizing the fast-pulse Health Physics Research Reactor at the Oak Ridge National Laboratory have been conducted since 1965. These studies have provided a total of 62 different organizations a forum for discussion of criticality accident dosimetry, an opportunity to test their neutron and gamma-ray dosimetry systems under a variety of simulated criticality accident conditions, and the experience of comparing results with reference dose values as well as with the measured results obtained by others making measurements under identical conditions. Sixty-nine nuclear accidents (27 with unmoderated neutron energy spectra and 42 with eight different shielded spectra) have been simulated in the studies. Neutron doses were in the 0.2-8.5 Gy range and gamma doses in the 0.1-2.0 Gy range. A total of 2,289 dose measurements (1,311 neutron, 978 gamma) were made during the intercomparisons. The primary methods of neutron dosimetry were activation foils, thermoluminescent dosimeters, and blood sodium activation. The main methods of gamma dose measurement were thermoluminescent dosimeters, radiophotoluminescent glass, and film. About 68% of the neutron measurements met the accuracy guidelines (+/- 25%) and about 52% of the gamma measurements met the accuracy criterion (+/- 20%) for accident dosimetry.

• OSTI ID: 5406481
• Journal Information: Health Physics; (USA), Journal Name: Health Physics; (USA) Vol. 57:3; ISSN 0017-9078; ISSN HLTPA
• Country of Publication: United States
• Language: English

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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACCIDENTS
BARYONS
COMPARATIVE EVALUATIONS
CRITICALITY
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NEUTRON SPECTRA
NEUTRONS
NUCLEONS
RADIATION DOSES
RADIATION MONITORING
RADIATIONS
REACTOR ACCIDENTS
REACTORS
SIMULATION
SPECTRA
THERMOLUMINESCENT DOSEMETERS