GAMMA-RAY ISOTOPIC MEASUREMENTS FOR ASSAY OF PLUTONIUM FUELS

Year
1976
Author(s)
J. F. Lemming - Mound Laboratory
Francis X. Haas - Monsanto Research Corporation
Abstract
The data presented in this paper summarizes our experience in obtaining plutonium and americium isotopic data using two systems: a 70 cc Ge(Li) system with 1.8 keV resolution at 1332 keV for acquisition of spectra up to 700 keV gamma-ray energy and a 1 cc planar system with 600 eV resolution at 122 keV for the acquisition of spectra up to 220 keV. Plutonium samples include ash samples with plutonium-240 concentrations of 9 to 20%; plutonium metal samples 6% - pl'utonium-240; ZPPR fuel pins; and various waste categories of 6% - plutonium-240 material. Nondestructive isotopic ratios obtained by gamma-ray spectroscopy are compared to chemical data obtained from these samples.