基于示范快堆的ADS次临界快堆堆芯研究

ADS Sub-critical Fast Reactor Core Research Based on Demonstration Fast Reactor

选取中国示范快堆作为次临界快堆参考堆芯,研究次临界快堆作为嬗变PWR(U)乏燃料中次锕系元素的可行性。中国示范快堆堆芯设计是参考目前正在建设的俄罗斯示范快堆BN-800。次临界快堆堆芯在示范快堆堆芯基础上去掉中间7盒组件放置铅靶组件,控制棒组件用含贫铀和次锕系元素(MA)的组件代替,转换区组件用反射层组件代替。采用MCNPX和ORIGEN2程序作为计算软件。计算结果表明:次临界快堆中加入MA后能够保持一定的次临界度且具有较好的嬗变效果,因此,选取示范快堆堆芯作为ADS次临界快堆的参考堆芯研究是可行的。

China Demonstration Fast Reactor（CDFR） was chosen for the reference core of ADS sub-critical fast reactor,mainly studying on the feasible of transmutation minor actinides from the spent fuel of PWR（U）.The design of CDFR referred to the BN-800 which is on construction of Russia.In the sub-critical fast reactor core,the inner 7 subassemblies of CDFR were replaced with lead target subassembly,the control rod subassemblies were replaced with the subassemblies which contain MA and depleted uranium,and the radial blanket of CDFR were replaced with reflect subassembly.MCNPX and ORIGEN2 code were used in the calculation.The calculation and analysis show that the sub-critical fast reactor is feasible for transmutation of minor actinides and can remain sub-critical when it adds some MA,it is feasible to choose the CDFR for the sub-critical fast reactor research.