Seventh Personnel Dosimetry Intercomparison Study

Technical Report · Tue Dec 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/5561459· OSTI ID:5561459

Swaja, R. E.; Sims, C. S.; Greene, R. T.

The Seventh Personnel Dosimetry Intercomparison Study was conducted March 31-April 10, 1981, at the Oak Ridge National Laboratory. Dosimeters from 34 participating agencies were mounted on anthropomorphic phantoms and exposed to a range of low-level dose equivalents (1.5-15.0mSv neutron and 0.1-2.8 mSv gamma) which could be encountered during routine personnel monitoring in mixed radiation fields. The Health Physics Research Reactor, operating in the steady-state mode, served as the source of radiation for two equivalent sets of six separate exposures. Lucite and concrete shields along with the unshielded reactor provided three different neutron and gamma spectra for five of the exposures in each set. Results reported by the participating agencies showed that no single type of neutron dosimeter exhibited acceptable performance characteristics for all mixed-field environments encountered in this study. Film, TLD, and TLD-albed dosimeters were found to be inadequate for neutron dose equivalent measurements when large numbers of slow neutrons are present unless significant corrections are made to measured results. Track dosimeters indicated the least sensitivity to spectral characteristics, but did not always yield to the most accurate results. Gamma dose measurements showed that TLD-700 dosimeters produced significantly more accurate results than film dosimeters which tend to overestimate gamma doses in mixed radiation fields.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5561459
• Report Number(s): ORNL/TM-8080; ON: DE82004937
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
AIR COOLED REACTORS
BIOLOGICAL SHIELDS
COMPARATIVE EVALUATIONS
DATA
DOSE EQUIVALENTS
DOSEMETERS
DOSIMETRY
ENRICHED URANIUM REACTORS
EPITHERMAL REACTORS
EXPERIMENTAL DATA
FAST REACTORS
GAS COOLED REACTORS
HPRR REACTOR
INFORMATION
MEASURING INSTRUMENTS
MOCKUP
NUMERICAL DATA
PERFORMANCE TESTING
PERSONNEL DOSIMETRY
PHANTOMS
PULSED REACTORS
RADIATION SOURCES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SHIELDS
STRUCTURAL MODELS
TESTING