百万千瓦级环形MOX燃料堆芯设计

摘要

Computing methods of assembly-parameters were studied for annular UO2 fuel and annular MOX fuel .A mixed core pattern containing 193 annular UO2 and MOX fuel assemblies was designed to possess an 18-month refueling cycle .Key physical parame-ters of the core were analyzed ,and the burnup calculation was performed for each cycle . The results show that while the core's electric power reaches 1 000 MWt ,a long refue-ling cycle can be obtained by loading about 30% MOX assemblies . The core can be transferred from an initial loading pattern to an equilibrium pattern ,and key physical parameters of each cycle meet all design requirements .Therefore ,the designed core and fuel management program are safe and feasible .%对环形UO2 燃料及环形MOX燃料组件参数的计算方法进行了研究.设计了包含193盒环形UO2 和MOX燃料组件的混合型长周期(18个月)堆芯方案.对设计的堆芯的重要物理参数进行了分析 ,并对各循环进行了燃耗计算.结果表明 ,装载约30% M OX组件的堆芯可在百万千瓦功率下实现长周期换料.堆芯从初装载可安全过渡到平衡循环 ,各循环的重要物理参数均满足设计要求 ,说明设计的堆芯及燃料管理方案是安全可行的.