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分别针对一次通过式和闭式燃料循环提出了2种钠冷快堆概念设计,2种堆芯均采用金属燃料以达到更优的增殖性能。首先,设计了高增殖比的快堆堆芯,该方案增殖比可达到1.4,倍增时间约11 a。提出了用于长寿期运行的快堆堆芯,该方案利用倒料的方式实现堆内增殖-焚烧,达到38 a的不换料运行。在此基础上,比较了两种基于不同策略快堆设计的差异,从堆芯参数、资源利用率和经济性等角度对不同理念的快堆设计进行了初步的分析。
Two kinds of sodium-cooled fast reactor concepts are proposed respectively for once-through and closed-cycle fuel cycles. Both of the two reactors adopt metal fuel to achieve better proliferation performance. First of all, a high-RCR reactor was designed with a multiplication ratio of 1.4 and a doubling time of about 11 a. A fast reactor core for long-life operation was proposed. In this project, the reactor was reprocessed and multiplied - incinerated for 38 days without refueling. Based on this, the differences between two kinds of fast reactor designs based on different strategies are compared. The fast reactor design with different concepts is analyzed from the aspects of core parameters, resource utilization and economy.