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HUANG De bao, ZHANG Wen liang, LU Zhao, ZHANG Xiao hong, ZHAO Rong sheng, LIU Da ming, LI Ji min, TONG Bo ting (China Institute of Atomic Energy, P.O.Box 275 48, Beijing 102413, China). Pedestrian Portal Monitor for Special Nuclear Material[J]. Atomic Energy Science and Technology, 2000, 34(5): 445-445. DOI: 10.7538/yzk.2000.34.05.0445
Citation: HUANG De bao, ZHANG Wen liang, LU Zhao, ZHANG Xiao hong, ZHAO Rong sheng, LIU Da ming, LI Ji min, TONG Bo ting (China Institute of Atomic Energy, P.O.Box 275 48, Beijing 102413, China). Pedestrian Portal Monitor for Special Nuclear Material[J]. Atomic Energy Science and Technology, 2000, 34(5): 445-445. DOI: 10.7538/yzk.2000.34.05.0445
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  • A pedestrian portal monitor for special nuclear material (SNM) and its software are developed. Its performances are as follows:detection sensitivities are 1.03 g and 0.031 8 g respectively for high enrichment uranium and low burned plutonium; false alarm probability is 1/5 500. The portal monitor for SNM is used to prevent unauthorized removal of fissile materials such as 235 U and 239 Pu in protected area. The monitor uses a personal computer to provide automatic operation. The sequential probability ratio test(SPRT) algorithm is used to determine the presence of SNM over background.
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