Study on neutron absorption correction technology of the waste drum assay system

ZHOU Zhibo; SUN Shiqi; LIU Likun; ZHANG Haiqing; CHU Quanli; LI Duohong; YANG Lifang; TAN Xizao; LIN Jun; WU Zhaohui

doi:10.11889/j.0253-3219.2021.hjs.44.030402

He jishu (Mar 2021)

Study on neutron absorption correction technology of the waste drum assay system

ZHOU Zhibo,
SUN Shiqi,
LIU Likun,
ZHANG Haiqing,
CHU Quanli,
LI Duohong,
YANG Lifang,
TAN Xizao,
LIN Jun,
WU Zhaohui

Affiliations

ZHOU Zhibo: State Nuclear Security Technology Center, Beijing 102401, China
SUN Shiqi: Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
LIU Likun: State Nuclear Security Technology Center, Beijing 102401, China
ZHANG Haiqing: Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
CHU Quanli: State Nuclear Security Technology Center, Beijing 102401, China
LI Duohong: State Nuclear Security Technology Center, Beijing 102401, China
YANG Lifang: State Nuclear Security Technology Center, Beijing 102401, China
TAN Xizao: State Nuclear Security Technology Center, Beijing 102401, China
LIN Jun: Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
WU Zhaohui: State Nuclear Security Technology Center, Beijing 102401, China

DOI: https://doi.org/10.11889/j.0253-3219.2021.hjs.44.030402
Journal volume & issue: Vol. 44, no. 3
pp. 030402 – 030402

Abstract

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Background Measurement of uranium and plutonium content in the waste drum assay system (WDAS) is affected by the absorption of the matrix in the drum due to the neutron coincidence counting of waste. Purpose This study aims to propose a method for correcting neutron coincidence counting applicable to the classification detection of WDAS. Methods First of all, the calibration function between the absorption correction factor of the external neutron source and the sample in the waste drum was established. Then the coincidence neutron count of plutonium in the waste drum was corrected according the calibration function. Thereby the activity and quality of α waste were accurately measured. Finally, a 252Cf source was taken as external neutron source for experimental verification of neutron absorption correction of WDAS. Results Experimental results show the relative deviation between the corrected 252Cf activity and the standard value is significantly reduced, and the deviation of the experimental correction results is better than 7%. Conclusions The absorption correction method improves the accuracy of the results and provides the basis for the extension and application of the device.

Published in He jishu

ISSN: 0253-3219 (Print)
Publisher: Science Press
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: https://www.hjs.sinap.ac.cn/

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