The Hanford Critical Radiation Dosimeter

Glenn, R. D.; Bramson, P.E.

doi:10.2172/1069231

Cited by 4 publications

(4 citation statements)

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“…The PNNL FNAD is a new design based on the Hanford FNAD which has been used since the 1960s at both Hanford and PNNL. The historical Hanford FNAD is described in Hanford historical documents (Bramson 1963, Glen andBramson 1977). The new PNNL FNAD design uses the same types of neutron activation detectors, and activation reactions for neutron dose assessment as the Hanford FNAD.…”

Section: Pnnl Fnadmentioning

confidence: 99%

PNNL Measurement Results for the 2016 Criticality Accident Dosimetry Exercise at the Nevada National Security Stite (IER-148)

Rathbone

Morley

Stephens

2017

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The Pacific Northwest National Laboratory (PNNL) participated in a criticality accident dosimetry intercomparison exercise held at the Nevada National Security Site (NNSS) May 24-27, 2016. The exercise was administered by Lawrence Livermore National Laboratory (LLNL) and utilized the Godiva-IV critical assembly housed in the Device Assembly Facility (DAF) situated on the NNSS site. The exercise allowed participants to test the ability of their nuclear accident dosimeters to meet the performance criteria in ANSI/HPS N13.3-2013, Dosimetry for Criticality Accidents and to obtain new measurement data for use in revising dose calculation methods and quick sort screening methods where appropriate. PNNL participated with new prototype Personal Nuclear Accident Dosimeter (PNAD) and Fixed Nuclear Accident Dosimeter (FNAD) designs as well as the existing historical PNAD design. The new prototype designs incorporate optically stimulated luminescence (OSL) dosimeters in place of thermoluminescence dosimeters (TLDs), among other design changes, while retaining the same set of activation foils historically used. The default dose calculation methodology established decades ago for use with activation foils in PNNL PNADs and FNADs was used to calculate neutron dose results for both the existing and prototype dosimeters tested in the exercise. The results indicate that the effective cross sections and/or dose conversion factors used historically need to be updated to accurately measure the operational quantities recommended for nuclear accident dosimetry in ANSI/HPS N13.3-2013 and to ensure PNAD and FNAD performance meets the performance criteria given in the standard. The operational quantities recommended for nuclear accident dosimetry are personal absorbed dose, D p (10), and ambient absorbed dose, D*(10).

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Section: Pnnl Fnadmentioning

confidence: 99%

PNNL Measurement Results for the 2016 Criticality Accident Dosimetry Exercise at the Nevada National Security Stite (IER-148)

Rathbone

Morley

Stephens

2017

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“…These components are used collectively to provide the best estimate of the neutron and gamma dose resulting from a criticality. The neutron activation foils are used to estimate the neutron fluence in several energy ranges, as follows: Bramson (1962) and by Glenn and Bramson (1977). The paraffin moderator of the Hanford FNAD is 30 cm high by 23 cm in diameter with 10-cm-thick paraffin walls.…”

Section: Fixed Nuclear Accidentmentioning

confidence: 99%

Hanford External Dosimetry Technical Basis Manual PNL-MA-842

Rathbone¹

2011

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“…The successful use of thermoluminescence as a means of measuring radiation dose has been demonstrated for many years (ICRU 1992). Hanford has used TLDs for personnel dosimetry since 1971 (Wilson 1987), for environmental dosimetry since 1972 (Denham et al 1972), and for nuclear accident dosimetry since 1977 (Glenn and Bramson 1977).…”

Section: Characteristics Of Tld Phosphors Used In Hedp Dosimetersmentioning

confidence: 99%

“…General features of FNADs are presented in this section. Original design features of the Hanford FNAD are presented in reports by Bramson (1962) and by Glenn and Bramson (1977). The paraffin moderator of the Hanford FNAD is 30 cm high by 23 cm in diameter with 10-cm-thick paraffin walls.…”

Section: Fixed Nuclear Accidentmentioning

confidence: 99%

Hanford External Dosimetry Technical Basis Manual PNL-MA-842

Rathbone¹

2005

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The Hanford External Dosimetry Program (HEDP) provides support to the U.S. Department of Energy's Richland Operations Office (RL), Office of River Protection (ORP), Pacific Northwest Site Office (PNSO), and DOE contractor radiation protection organizations in determining doses-of-record from external sources of radiation. The Pacific Northwest National Laboratory (PNNL) (a) administers the HEDP in coordination with Hanford contractor radiation protection organizations to ensure consistent site-wide implementation of external dosimetry practices for Hanford workers and visitors. Coordination of dosimetry practices at Hanford is accomplished through the Hanford Personnel Dosimetry Advisory Committee (HPDAC). Technical services provided by the HEDP include personnel, area, nuclear accident, and environmental dosimetry capabilities that comply with DOE requirements in 10 CFR 835, the DOE Laboratory Accreditation Program (DOELAP) performance standard (DOE 1986a) and DOELAP handbook (DOE 1986b) as well as selected DOE guidance in the Radiological Control standard (DOE 1999a), and the External Dosimetry Program Guide (DOE 1999b).The primary purposes of this Hanford External Dosimetry Technical Basis Manual are to document the design and implementation of the external dosimetry system used at Hanford, and to document the rationale for the methods used. This manual includes documentation of the technical basis for the dosimeter design, processing protocols, dose calculation methodology, and recommended dosimeter use in the field, in a manner intended to demonstrate compliance with 10 CFR 835 and Hanford requirements and to ensure the defensibility of the doses of record. A secondary purpose of this manual is to provide general information on dosimeter response characteristics and guidance on the proper use and limitations

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The Hanford Critical Radiation Dosimeter

Cited by 4 publications

References 1 publication

PNNL Measurement Results for the 2016 Criticality Accident Dosimetry Exercise at the Nevada National Security Stite (IER-148)

PNNL Measurement Results for the 2016 Criticality Accident Dosimetry Exercise at the Nevada National Security Stite (IER-148)

Hanford External Dosimetry Technical Basis Manual PNL-MA-842

Hanford External Dosimetry Technical Basis Manual PNL-MA-842

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