重水零功率堆顶部屏蔽的设计经过两个阶段的分析比较,得出了比较合理和现实可行的设计方案。第一阶段分析,采用经验或半经验的辐射穿透计算和散射计算,并在原有实验大厅屋顶厚度和材料不太确切的情况下,假设大厅屋顶为40cm混凝土进行辐射屏蔽计算,根据计算确定在堆芯顶部采用加硼石蜡外套钢板的复合屏蔽体,其重量只受限于大厅吊 The design of the top shield of zero-power reactor for heavy water has been analyzed and compared in two stages, and a more reasonable and realistic design proposal has been obtained. In the first stage of analysis, empirical or semi-empirical calculations of radiation penetration and scattering are used. If the thickness and material of the roof of the original experimental hall are not accurate enough, the ceiling of the hall is assumed to be 40cm of concrete for radiation shielding calculation. Based on the calculation, The core of the top with boron paraffin wax coated steel shield, its weight is limited only by the hall