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Uranium Enrichment Analysis with Gamma-ray Spectroscopy  

Eom, Sung-Ho (Korea Atomic Energy Research Institute)
Jeong, Hye-Kyun (Korea Advanced Institute of Science and Technology)
Park, Jun-Sic (Korea Atomic Energy Research Institute)
Park, Se-Hwan (Korea Atomic Energy Research Institute)
Shin, Hee-Sung (Korea Atomic Energy Research Institute)
Publication Information
Journal of Radiation Protection and Research / v.36, no.1, 2011 , pp. 16-23 More about this Journal
Abstract
Accurate measurement of uranium enrichment is very important in nuclear material accountability. The analysis uncertainty of the uranium enrichment measurement with gamma-ray analysis was studied in the present work. FRAM (Fixed energy Response function Analysis with Multiple efficiencies) code was used to determine the uranium enrichment. If the shield materials were placed between the detector and the sample, the error was measured and analyzed. Measurement time was varied and the dependency of the analysis uncertainty on the measurement time was studied. Transmitted gamma-ray intensities and FWHMs of the peaks in the energy spectrum were measured as the shield thickness was varied. The transmitted gamma-ray intensity follows shape of the exponential function, and the FWHM was almost independent of the shield thickness. The uncertainty of FRAM analysis was studied when the thick shield material was placed between the detector and the sample. Our work could be helpful in analysis of the fissile material in uranium sample.
Keywords
FRAM; uranium; enrichment;
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