Eleventh ORNL personnel dosimetry intercomparison study, May 22-23, 1985

Technical Report · Tue Jul 01 04:00:00 EDT 1986

DOI:https://doi.org/10.2172/5379596· OSTI ID:5379596

Swaja, R E; Oyan, R; Sims, C S

The Eleventh Personnel Dosimetry Intercomparison Study was conducted at the Oak Ridge National Laboratory (ORNL) during May 22-23, 1985. Dosimeter badges from 44 participating organizations were mounted on Lucite block phantoms and exposed to four mixed-radiation fields with neutron dose equivalents around 5 mSv and gamma dose equivalents between 0.1 and 0.7 mSv. Results of this study indicated that no participants had difficulty obtaining measurable indication of neutron exposure at the provided dose equivalent levels, and very few had difficulty obtaining indication of gamma exposure at dose equivalents as low as 0.10 mSv. Average neutron results for all dosimeter types were within 20% of reference values with no obvious spectrum dependence. Different dosimeter types (albedo, direct interaction TLD, film, recoil track, and combination albedo-track) with 10 or more reported measurements provided average results within 35% of reference values for all spectra. With regard to precision, about 80% of the reported neutron results had single standard deviations within 10% at the means which indicates that precision is not a problem relative to accuracy for most participants. Average gamma results were greater than reference values by factors of 1.07 to 1.52 for the four exposures with TLD systems being more accurate than film. About 80% of all neutron results and 67% of all gamma results met regulatory standards for measurement accuracy and approximately 70% of all neutron data satisfied national dosimetry accreditation criteria for accuracy plus precision. In general, neutron dosimeter performance observed in this intercomparison was much improved compared to that observed in the prior studies while gamma dosimeter performance was about the same.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5379596
• Report Number(s): ORNL-6296; ON: DE86013815
• Country of Publication: United States
• Language: English

Related Subjects

440102 -- Radiation Instrumentation-- Radiation Dosemeters
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
ACCURACY
AIR COOLED REACTORS
DOSEMETERS
DOSIMETRY
ENRICHED URANIUM REACTORS
EPITHERMAL REACTORS
FAST REACTORS
GAMMA DOSIMETRY
GAS COOLED REACTORS
HPRR REACTOR
INTERLABORATORY COMPARISONS
MEASURING INSTRUMENTS
MOCKUP
NEUTRON DOSIMETRY
PERSONNEL DOSIMETRY
PHANTOMS
PULSED REACTORS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
STRUCTURAL MODELS