Final Design for an International Intercomparison Exercise for Nuclear Accident Dosimetry at the DAF Using Godiva-IV: IER-148 CED-2 Report

Heinrichs, D.; Beller, Tim; Burch, J.; Cummings, Rick; Duluc, Matthieu; Gadd, Milan S.; Goda, Joetta; Hickman, D.; McAvoy, Doug; Rathbone, Bruce A.; Sullivan, R.E.; Trompier, F.; Veinot, K. G.; Ward, Dann C.; Will, Rashelle; Wilson, Chris; Zieziulewicz, Thomas

doi:10.2172/1171342

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“…A previous value of C n = 4.27 had been determined for use with an earlier prototype of the PNNL PNAD that was documented in the IER-148 CED-2 intercomparison exercise final design report (Heinrichs et. al.…”

Section: Notementioning

confidence: 99%

“…Naval Dosimetry Center (NDS), NNSS, Pacific Northwest National Laboratory (PNNL), Sandia National Laboratory (SNL), Savannah River Site (SRS), the Atomic Weapons Establishment (AWE) from the United Kingdom, and the Institute for Radiological Protection and Nuclear Safety (IRSN) from France. The final planned experimental design is described in IER-148 CED-2 Report (Heinrichs, et. al.…”

Section: Introductionmentioning

confidence: 99%

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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: Notementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%