An on-line instrumented material irradiation rig (MARICO-II) was used for investigating temperature history effect for void swelling behavior in V-Fe binary alloys irradiated at a fast rector, Joyo. Neutron irradiation were performed at 477C with 7.5 dpa in the temperature control capsule (TC capsule) and at 482C maximum temperature with 20.4 dpa in the conventional capsule with monitoring temperature. In the TC capsule, voids was formed and distributed homogeneously, on the other hand a lot of tiny void formation or bimodal void distribution were observed in the conventional capsule, The void swelling rate of V-Fe alloys irradiated in the TC capsule was larger than that in the conventional capsule and it is caused by the imbalance of point defect flux to sink due to void nucleation at the low temperature transient regime in start-up and shutdown period of each cycle in neutron irradiation, that is temperature history effect for swelling behavior of V-Fe binary alloys during neutron irradiation.

使用在线仪器材料辐照装置（MARICO-II）研究温度历史对在快速对流器Joyo上辐照的V-Fe二元合金中空膨胀行为的影响。在温度控制胶囊（TC胶囊）中以7.5 dpa在477°C下进行中子辐照，在常规胶囊中以监测温度在482°C最高温度以20.4 dpa进行中子辐照。在TC胶囊中，形成了空隙并均匀分布，另一方面，在常规胶囊中观察到很多微小的空隙形成或双峰空隙分布，