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http://dx.doi.org/10.1016/j.net.2019.10.018

A 235U mass measurement method for UO2 rod assembly based on the n/γ joint measurement system  

Yang, Jianqing (Xi'an Research Institute of Hi-Tech)
Zhang, Quanhu (Xi'an Research Institute of Hi-Tech)
Su, Xianghua (Xi'an Research Institute of Hi-Tech)
Li, Sufen (Xi'an Research Institute of Hi-Tech)
Zhuang, Lin (Xi'an Research Institute of Hi-Tech)
Hou, Suxia (Xi'an Research Institute of Hi-Tech)
Huo, Yonggang (Xi'an Research Institute of Hi-Tech)
Zhou, Hao (China Institute of Atomic Energy)
Liu, Guorong (China Institute of Atomic Energy)
Publication Information
Nuclear Engineering and Technology / v.52, no.5, 2020 , pp. 1036-1042 More about this Journal
Abstract
Fast-Neutron Multiplicity Counter based on Liquid Scintillator Detector can directly measure the fast neutron multiplicity emitted by UO2 rod. HPGe gamma spectrometer; which has superior energy resolution; is routinely used for the gamma energy spectrum measurement. Combing Fast-Neutron Multiplicity Counter and HPGe γ-spectrometer, the n/γ joint measurement system is developed. The fast neutron multiplicity and gamma energy spectrum of UO2 rod assemblies under different conditions are measured by the n/γ joint measurement system. The induced fission rate and the 235U abundance, thereby the 235U mass; can be obtained for UO2 rod assemblies. The 235U mass deviation of the measured value from the reference value is less than 5%. The results show that the n/γ joint measurement system is effective and applicable in the measurement of the 235U mass in samples.
Keywords
Fast-neutron multiplicity counter; $n/{\gamma}$ joint measurement system; Liquid scintillator detector; HPGe ${\gamma}$ spectrometer; $UO_2$ rod assembly; $^{235}U$ mass;
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