Long-cycle Fuel Management Strategy Research of Qinshan Ⅱ NPP

Currently, the annual and OUT-IN reloading strategy is used in Qinshan Ⅱ NPP, which employs 36 new assemblies with 3.7% enrichment. The long-cycle fuel management strategy which uses IN-OUT reloading method and employs 44 fresh assemblies with 4.45% enrichment, is adopted in unit 2 cycle 11 (U2C11). A long-cycle fuel management strategy, adopting IN-OUT reloading method and 48 fresh assemblies with 4.45% enrichment, was presented. The purpose of presented strategy is to extend the cycle length, shorten shutdown time and exalt the utilization rate of power plant. The main attributes of these three fuel management strategies were analyzed and compared. As a result, the presented long-cycle fuel management strategy is the optimized strategy.