Godiva-IV leakage dose characterization

Abstract

International audienceAs new nuclear accident dosimetrists are being trained by their respective institutions, there was a need for nuclear accident dosimeter (NAD) ntercomparison exercises. This required a reference neutron and photon dose for nuclear accident dosimetrists to test their dosimeters and analysis. The U.S. Department of Energy (DOE) Nuclear Criticality Safety Program (NCSP) supported an experimental campaign to characterize the Godiva-IV leakage dose in 2014 to support future exercises. A Passive Bonner Sphere Spectrometer (PBSS) was deployed by Atomic Weapons Establishment (AWE) to measure the neutron spectrum. CaF thermoluminescent dosimeters (TLDs) were used to measure the photon doses. The results were documented in a report at that time but this paper reanalyzed and updated those results with other measurements in the interim. This work established updated reference neutron and photon doses as a function of radial distance from the center of Godiva-IV, which will be used for future NAD intercomparison exercises