摘要
采用MCNP程序对锂冷热管式锂冷空间快堆建立中子学计算模型,对其中子通量密度和功率分布、有效增殖因子等进行了计算,采用分区燃料布置,得到满足长寿命运行要求的分区装载方案,利用ORIGEN2程序进行燃耗校核,计算了转鼓的价值和转鼓转角随运行时间的变化情况。模型分析结果表明:分区装料后的堆芯满足临界安全设计和不均匀系数要求;堆芯的过剩反应性足够7年不换料满功率运行;意外发射失败掉入湿沙或海水中,由于有谱移吸收体铼,堆芯仍然保持足够的次临界度;转鼓的价值可以保证堆芯在整个寿期内安全的停堆和正常的启动;热管式锂冷空间快堆基本物理特性合理,满足设计要求。
Neutronics models have been set up for heat piped lithium cooled space fast reactor in different core arrangements based on MCNP code.The flux and power pinaverage to core-average ratio,effective multiplication constant,etc.are calculated.Optimized arrangement is made for the final reactor core,satisfying the demand of long life operation.ORIGEN2 code is used to validate the burn up process.Control drums’reactivity value and the relation between drums’rotation and operating time are calculated.The result indicates that optimized reactor satisfies the criterion of criticality safety and pin-average to core-average ratio,excess reactivity is enough for seven years full power operation without refueling.The reactor core can keep subcritical during submersion in seawater and wet sand because of the spectrum shift absorber Re.The value of control drums ensures the safe shutdown and normal startup during the whole life.The basic characteristics of heat piped lithium cooled space fast reactor fulfill the design criterion.
出处
《核科学与工程》
CSCD
北大核心
2014年第4期448-453,共6页
Nuclear Science and Engineering
