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分析了球床式高温气冷堆几种可能的初装堆方案的特点,选取石墨球与燃料球均匀混合作为10MW高温气冷实验堆(HTR10)的初装堆方案.利用高温气冷堆物理设计程序VSOP进行计算,分析了HTR10从初始装料向平衡态过渡过程中的倒换料方式、最大单球功率及最大燃耗变化情况.结果表明:石墨球与燃料球均匀混合装料,采用改变加料速度的方式,可使堆在keff比较稳定的状态下运行,且最大单球功率和最大燃耗不超过设计限值.所以,HTR10初装堆设计中采用石墨球与燃料球均匀混合装料方案是可行的.
The characteristics of several possible initial stack schemes for ball bed HTGRs were analyzed. The graphite balls and fuel balls were uniformly mixed as the initial stack solution for the 10MW high temperature gas cooled reactor (HTR-10). Using high-temperature gas-cooled reactor physical design program VSOP calculation, analysis of the HTR 10 from the initial charge to the equilibrium state of the process of switching material, the maximum single-ball power and maximum fuel consumption changes. The results show that the graphite ball and the fuel ball are uniformly mixed and charged, and the method of changing the feeding speed can make the reactor operate under a relatively stable keff condition, and the maximum single-ball power and the maximum fuel consumption do not exceed the design limits. Therefore, HTR 10 initial heap design using graphite ball and fuel ball uniform mixing charging scheme is feasible.