Response of TLD-albedo and nuclear track dosimeters exposed to plutonium sources

Technical Report · Sun Dec 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/5926091· OSTI ID:5926091

Brackenbush, L W; Baumgartner, W V; Fix, J J

Neutron dosimetry has been extensively studied at Hanford since the mid-1940s. At the present time, Hanford contractors use thermoluminescent dosimeter (TLD)-albedo dosimeters to record the neutron dose equivalent received by workers. The energy dependence of the TLD-albedo dosimeter has been recognized and documented since introduced at Hanford in 1964 and numerous studies have helped assure the accuracy of dosimeters. With the recent change in Hanford's mission, there has been a significant decrease in the handling of plutonium tetrafluoride, and an increase in the handling of plutonium metal and plutonium oxide sources. This study was initiated to document the performance of the current Hanford TLD-albedo dosimeter under the low scatter conditions of the calibration laboratory and under the high scatter conditions in the work place under carefully controlled conditions at the Plutonium Finishing Plant (PFP). The neutron fields at the PFP facility were measured using a variety of instruments, including a multisphere spectrometer, tissue equivalent proportional counters, and specially calibrated rem meters. Various algorithms were used to evaluate the TLD-albedo dosimeters, and the results are given in this report. Using current algorithms, the dose equivalents evaluated for bare sources and sources with less than 2.5 cm (1 in.) of acrylic plastic shielding in high scatter conditions typical of glove box operations are reasonably accurate. Recently developed CR-39 track etch dosimeters (TEDs) were also exposed in the calibration laboratory and at the PFP. The results indicate that the TED dosimeters are quite accurate for both bare and moderated neutron sources. Until personnel dosimeter is available that incorporates a direct measure of the neutron dose to a person, technical uncertainties in the accuracy of the recorded data will continue.

• Research Organization: Pacific Northwest Lab., Richland, WA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5926091
• Report Number(s): PNL-7881; ON: DE92006875
• Country of Publication: United States
• Language: English

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ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ALBEDO-NEUTRON DOSEMETERS
ALPHA DECAY RADIOISOTOPES
CALIBRATION
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
CHALCOGENIDES
DOSE EQUIVALENTS
DOSEMETERS
DOSES
DOSIMETRY
ELEMENTS
EQUIPMENT
EVEN-EVEN NUCLEI
GLOVEBOXES
HANFORD RESERVATION
HE-3 COUNTERS
HEAVY NUCLEI
ISOTOPES
LABORATORY EQUIPMENT
LUMINESCENT DOSEMETERS
MEASURING INSTRUMENTS
METALS
MONITORING
NATIONAL ORGANIZATIONS
NEUTRON DETECTORS
NEUTRON DOSIMETRY
NEUTRON SOURCES
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PARTICLE SOURCES
PERFORMANCE
PERSONNEL MONITORING
PLUTONIUM
PLUTONIUM COMPOUNDS
PLUTONIUM OXIDES
PROPORTIONAL COUNTERS
QUALITY ASSURANCE
RADIATION DETECTORS
RADIATION DOSES
RADIATION MONITORING
RADIATION SOURCES
RADIOISOTOPES
SPONTANEOUS FISSION RADIOISOTOPES
THERMOLUMINESCENT DOSEMETERS
TRANSURANIUM COMPOUNDS
TRANSURANIUM ELEMENTS
US DOE
US ERDA
US ORGANIZATIONS
YEARS LIVING RADIOISOTOPES