聚变驱动的次临界系统嬗变MA的研究

Minor Actinide Transmutation Analysis of Fusion-Driven Subcritical System

一种嬗变次锕系核素(MA)的聚变驱动次临界包层的概念设计被提出。利用MCNP+ORIGEN2对次临界嬗变包层的能量放大倍数(M)、氚增殖比(TBR)、第一壁负载等中子学参数进行了分析。在保证这些参数满足设计要求的前提下,分析了两种不同的装载方案对MA嬗变能力的影响,最终MA的嬗变率能达24.3%,嬗变支持比为28。研究表明,该聚变驱动次临界嬗变包层能有效嬗变MA。

A conceptual design of a subcritical blanket which was driven by a fusion neutron source was proposed for the transmutation of minor actinides.The neutronics parameters of transmutation blanket were carried out by a code package coupling the Monte-Carlo transport code and ORIGEN2 depletion code,which mainly included the energy multiplication factor（M）,the tritium breeding ratio（TBR） and the first neutron wall loading.The transmutation capabilities of two loading patterns were performed and compared under the condition of the neutronics parameters to meet the design requirements.The final transmutation fraction of MA can reach 24.3%,and support ratio of MA transmutation can reach 28.The study result shows that the fusion-driven subcritical transmutation blanket can effectively burn MA.