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加速器驱动次临界(accelerator driven subcritical system,ADS)系统由加速器、散裂靶、反应堆3部分组成,被认为是安全处理核废料最具前景的技术方案.其中,散裂靶用结构材料需要同时具有耐高温、抗辐照、抗液态金属腐蚀等性能.针对这一挑战研发了新型核用(9%~12%)Cr马氏体耐热钢——SIMP钢.通过制衡(9%~12%)Cr马氏体耐热钢中C,Cr,Si等元素含量对耐高温、抗辐照、抗液态金属腐蚀性能的影响,获得了SIMP钢优化的化学成分,极好地平衡了SIMP钢耐高温、抗辐照、抗液态金属腐蚀3方面性能.对1 t和5 t SIMP钢各项性能进行测试,结果表明,SIMP钢是ADS系统中散裂靶的首选结构材料.
Accelerator-driven subcritical system (ADS) system consists of three parts: accelerator, spalling target and reactor, which is considered as the most promising solution for safely treating nuclear waste, in which the structural material for spallation target needs to have both (9% ~ 12%) Cr martensite heat-resisting steel, SIMP steel, has been developed to meet the challenge through balancing (9% ~ 12% ) Cr martensitic heat-resistant steel C, Cr, Si and other elements on the high temperature, anti-radiation, liquid metal corrosion resistance obtained SIMP steel optimized chemical composition, excellent balance of SIMP steel resistance High temperature, radiation resistance and liquid metal corrosion resistance.All the performances of 1t and 5t SIMP steels were tested.The results show that SIMP steels are the preferred structural materials for spallation targets in ADS system.