Year
2008
Abstract
Passive time coincidence measurements have been performed on highly enriched uranium (HEU) oxide fuel pins at the Idaho National Laboratory Power Burst Facility. These experiments evaluated HEU detection capability using passive coincidence counting with moderated 3He tubes. Data acquisition was performed with the Nuclear Materials Identification System (NMIS) to calculate the neutron coincidence time distributions. The amounts of HEU measured were 1, 4, and 8 kg in sealed 55 gal drums. Data collected with the 3He tubes also included passive measurement of 31 kg of depleted uranium (DU) to determine the ability to distinguish HEU from DU. This paper presents results from these measurements.