Twenty-Second ORNL Intercomparison of Criticality Accident Dosimetry Systems, August 12-16, 1985

Conference · Tue Aug 12 04:00:00 EDT 1986

OSTI ID:5482342

Swaja, R. E. ^[1]; Oyan, R. ^[1]; Sims, C. S. ^[1]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The twenty-second in a series of criticality accident dosimetry intercomparison studies was conducted at the Oak Ridge National Laboratory's Dosimetry Applications Research Facility during August 12-16, 1985. The Health Physics Research Reactor operated in the pulse mode over Storage Pit No. 1 was used to simulate three criticality accidents with different radiation fields. Participants from nine organizations measured neutron doses between 0.36 and 3.78 Gy and gamma doses between 0.22 and 0.80 Gy at area monitoring stations and on phantoms. Approximately 68% of all neutron dose estimates based on foil activation, thermoluminescent, hair activation, and blood sodium activation methods were within +-25% of reference values. About 44% of all gamma results measured using thermoluminescent dosimeters (TLD-700 or CaSO₄ phosphors) were within 20% of reference doses. The generally poor measurement accuracy exhibited in this study indicates a need for continuing ORNL accident dosimetry intercomparison and training programs.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5482342
• Report Number(s): ORNL--6276; CONF-850822-Summs.; ON: DE86011671
• 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
96 KNOWLEDGE MANAGEMENT AND PRESERVATION
ACCIDENTS
ACTIVATION DETECTORS
CRITICALITY
Criticality Accident Dosimetry Intercomparison Studies
DOSEMETERS
DOSIMETRY
GAMMA DOSIMETRY
INTERLABORATORY COMPARISONS
LUMINESCENT DOSEMETERS
MEASURING INSTRUMENTS
NEUTRON DETECTORS
NEUTRON DOSIMETRY
Nuclear Criticality Safety Program (NCSP)
RADIATION ACCIDENTS
RADIATION DETECTORS
SIMULATION
THERMOLUMINESCENT DOSEMETERS
Thermoluminescent