VIEWS: 0 PAGES: 1 POSTED ON: 7/20/2012
Passive Time Coincidence Measurements with HEU Oxide Fuel Pins Seth McConchie, Paul Hausladen, and John Mihalczo Oak Ridge National Laboratory Brandon Blackburn Idaho National Laboratory Passive time coincidence measurements have been performed on HEU oxide fuel pins at the Idaho National Laboratory Power Burst Facility. These experiments evaluate HEU detection capability using passive coincidence counting when fast liquid scintillators. Pulse shape discrimination was used with the liquid scintillators to distinguish neutrons from gamma-rays. Data acquisition was performed with the Nuclear Material Identification System (NMIS) to calculate the neutron and gamma coincidence time distributions. The amounts of HEU measured were 1 kg, 4 kg, and 8 kg in sealed 55- gallon drums. Data collected with the liquid scintillators include gamma-ray energy thresholds at low energy (160 keV) and high energy (3 MeV) to evaluate the ability to detect the presence of HEU using gamma-ray coincidences. This paper presents results from the measurements.
Pages to are hidden for
"Alpha Detector Pixelization Affects on NMIS Imaging"Please download to view full document