为在中国实验快堆（CEFR）上开展国产快堆包壳材料的辐照试验，进行了CEFR首个结构材料辐照装置的设计。材料辐照装置的创新设计基于CEFR的辐照条件和堆芯组件的基本结构，通过在辐照装置内部设置不同气隙尺寸的辐照罐，实现了在快堆不同功率稳态运行条件下（40％和100％额定功率）对材料样品不同辐照温度（450～600℃）的要求。辐照装置具有样品辐照温度与中子注量率的非在线监测功能，其结构具有通用性，能满足材料辐照标准试样最大装载的需要。通过对辐照装置进行热工分析和堆外的传热验证试验、流阻特性和结构稳定性验证试验，保证了辐照装置的设计能满足材料辐照任务的要求。%The first structural material irradiation rig used in China Experimental Fast Reactor (CEFR) was designed in order to carry out irradiation test for domestically pro‐duced fast reactor cladding material .The innovated design of irradiation rig was based on both the CEFR irradiation conditions and the basic configuration of CEFR fuel assem‐bly .T he irradiation rig w hich had special sizes of inner gas gaps could irradiate material samples at different irradiation temperatures (450‐600 ℃) during different powers (40%and 100% rated powers) of CEFR steady state operation .There are indicating samples inside the irradiation capsule for monitoring temperature range and neutron fluence rate . The irradiation rig has a general configuration which can realize the maximum loading for the standard irradiation samples and be used as a standard irradiation device for reac‐tor structural material irradiation in CEFR .T he design of irradiation rig can satisfy the requirement of material irradiation by means of thermal‐hydraulic analysis and relevant out‐of‐pile heat transfer ,flow resistance and structure stability verification tests .
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