【摘要】 基于后处理生产的~3He中子探测器，开展了桶型中子探测效率标定装置的材料选择及功能结构设计分析，使用MCNP程序构建了装置及~3He探测器的相关计算模型，根据生产过程及设计需求，分别分析了桶型中子探测效率标定装置慢化层的慢化效果，及不同位置多根~3He管中子探测器的探测效率，并计算了源管、探测器上方及屏蔽体周围的剂量，结果表明该装置的慢化能力及屏蔽效果良好，放射性剂量水平满足辐射防护要求。更多还原

【Abstract】 In this paper, the material selection and functional structure design of ~3He tube barrel neutron detection efficiency calibration device for spent-fuel reprocessing are carried out. The calculation models of the device and ~3He detector are built based on MCNP program, the moderating ability and effect of the moderating layer of the device are calculated, the detection efficiency of several ~3He tube neutron detectors at different positions and the dose above the source tube, detector and around the shield are calculated. The results show the calibration and shielding effect of the device are good, and the radioactive dose level meets the requirements of radiation protection.更多还原