磁约束聚变堆次临界包层概念设计研究进展

为使磁约束聚变堆实现能量放大与氚自持,在其等离子体区周围设置次临界包层和产氚包层。采用天然铀合金燃料、轻水作冷却剂兼慢化剂,内嵌压力管式的次临界包层设计方案,通过对包层物理性能、结构概念设计、热工水力性能和安全分析,表明该方案可将聚变能量放大10倍以上,氚增殖比大于1.15,具有天然的临界安全性和良好余热安全性能。立足于近中期可利用的聚变技术,力争实现聚变能源的提前商用,为我国能源可持续发展提供一种有竞争力的技术选项。

Research development on conceptual design of subcritical blanket driven by magnetic fusion reactor

In order to achieve tritium self-sustaining and energy amplification of the magnetic confinement fusion reactors, sub-critical blanket and tritium breeding blanket were set around the plasma region. We adopted natural uranium alloy as fuel, light water as coolant and moderator and embedded pressure tube sub-critical blanket as blanket design. By the analysis of neutronic physical properties, structural concept design, thermal-hydraulic performance and reactor safety, it shows that the multiplication factor may reach 10, tritium breeding ratio is greater than 1.15, and the blanket keeps in a deep sub-critical state and shows good heat safety performance. Based on the recently available fusion technology, we are striving to achieve the early commercial use of fusion energy and provide a competitive technology options for the sustainable development of China's energy.