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DENG Jing-shan1, ZHU Guo-sheng2, ZHOU Cheng-fang1, SONG Lei2, WANG Shi-bai1,WU Si-qing1, SHI Ze-xuan1, SU Shan-jia1, QIN Cheng-li1(1.Zhengzhou Fifth Research and Design Institute of Nuclear Industry, P.O Box 253, Zhengzhou 450052, China;2.Yibin Nuclear Fuel Element Fa. Fuel Rod ~(235)U Enrichment Uniformity Scanner With ~(252)Cf Neutron Activation Method[J]. Atomic Energy Science and Technology, 2003, 37(6): 538-538. DOI: 10.7538/yzk.2003.37.06.0538
Citation: DENG Jing-shan1, ZHU Guo-sheng2, ZHOU Cheng-fang1, SONG Lei2, WANG Shi-bai1,WU Si-qing1, SHI Ze-xuan1, SU Shan-jia1, QIN Cheng-li1(1.Zhengzhou Fifth Research and Design Institute of Nuclear Industry, P.O Box 253, Zhengzhou 450052, China;2.Yibin Nuclear Fuel Element Fa. Fuel Rod ~(235)U Enrichment Uniformity Scanner With ~(252)Cf Neutron Activation Method[J]. Atomic Energy Science and Technology, 2003, 37(6): 538-538. DOI: 10.7538/yzk.2003.37.06.0538
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    • Abstract
  • The developed scanner for scanning fuel rod 235U enrichment uniformity is based on the 252Cf neutron activation method, in which the delay gamma rays emitted by fission products from 235U fission induced by moderated 252Cf neutrons are counted along the fuel rod moved successively through the irradiator containing 252Cf neutron sources and the BGO crystal detectors at a constant speed by a mechanical conveyor. The present equipment has two channels for inspecting two fuel at the same time. When a 252Cf source of 1.2 mg is used, the single offspec pellet which deviates from normal enrichment by ±10% can be detected at the scanning speed of 7 m/min with 97.74% confidence.
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