为使反应堆处于运行状态时 ,对辐射源的屏蔽满足辐射安全的要求 ,以及对堆的各部件和材料满足辐射限制的要求 ,必须设计堆的主屏蔽层。介绍了主屏蔽的设计与计算方法 ,以研究堆为设计实例 ,给出了主屏蔽的主要计算结果表明 ,以池水和重混凝土作生物屏蔽能满足辐射安全限值的要求 ,设计的主屏蔽层是适宜的 In order for the reactor to be operational, the shield of the radiation source meets the requirements of radiation safety and the radiated emission limits of the various components and materials of the stack must be designed. The main shield of the stack must be designed. The main shield design and calculation method are introduced. Taking the research reactor as a design example, the main calculation results of the main shield are given. The main shield of the designed main shield is that the biological shield of the pool water and heavy concrete can meet the requirements of radiation safety limits. Is suitable