CAJ | 학술논문

超临界水冷快堆结构简化,堆芯功率密度高并且不存在沸腾危机,是一种比较有前途的先进核能系统.但潜在的正空泡反应性系数是需要认真考虑的安全问题.本文建立了改进Flower型超临界水冷快堆堆芯模型,并通过对堆芯分区布置,冷却剂密度分层、MOX燃料合理设计、燃料富集度轴向分层布置,blanket组件盒厚度增加及内部通道采用贫铀冷却的方案,获得了负的空泡反应性系数,初步达到了堆芯的安全设计要求.
초림계수랭쾌퇴결구간화,퇴심공솔밀도고병차불존재비등위궤,시일충비교유전도적선진핵능계통.단잠재적정공포반응성계수시수요인진고필적안전문제.본문건립료개진Flower형초림계수랭쾌퇴퇴심모형,병통과대퇴심분구포치,냉각제밀도분층、MOX연료합리설계、연료부집도축향분층포치,blanket조건합후도증가급내부통도채용빈유냉각적방안,획득료부적공포반응성계수,초보체도료퇴심적안전설계요구.
The Supercritical Water-Cooled Fast Reactor has a characteristic of plant simplification design and high power density,without burnout or drying out crisis.It is a very promising advanced Nuclear Power system.However,the potentially positive void reactivity coefficient requires serious considerations.A model of improved SCWFR core-＂Flower type＂ is established in this paper,negative void reactivity effect is obtained by the ways of core zoning scheme,Axial coolant densities zoning,MOX fuel with reasonable design and axial enrichment zoning,blanket assembly with thick box and solid uranium matrix cooled by internal clad channels,finally the primary demand for reactor safety is met.