Uranium Enrichment Determination Using a New Analysis Code for the U XKα Region: HyperGam-U

Nuclear Engineering and Technology

Junhyuck Kim¹  Hee-Dong Choi¹  Jongho Park² 

[1] Department of Nuclear Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 989 Daedeok-daero, Yuseong-gu, Daejeon 34057, Republic of Korea;

关键词: Attenuation Correction;    Enrichment;    γ- and X-ray Spectroscopy;    HyperGam-U;    True Coincidence Summing Correction;    Uranium;   

DOI  :  10.1016/j.net.2016.01.019

来源: DOAJ

【 摘 要 】

HyperGam-U was recently developed to determine uranium enrichment based on γ- and X-ray spectroscopy analysis. The XKα region of the uranium spectrum contains 13 peaks for 235U and 238U and is used mainly for analysis. To describe the X-ray peaks, a Lorentzian broadened shape function was used, and methods were developed to reduce the number of fitting parameters for decomposing the strongly overlapping peaks using channel-energy, energy-width, and energy-efficiency calibration functions. For validation, eight certified reference material uranium samples covering uranium enrichments from 1% to 99% were measured using a high-resolution planar high-purity germanium detector and analyzed using the HyperGam-U code. When corrections for the attenuation and true coincidence summing were performed for the detection geometry in this experiment, the goodness of fit was improved by a few percent. The enrichment bias in this study did not exceed 2% compared with the certified values for all measured samples.

【 授权许可】

Unknown