改进Flower型超临界水冷快堆负空泡反应性初步分析设计  

The Negative Void Reactivity Effect Preliminary Design for the Improved "Flower" Type SCWFR Core

作　　者：彭红花[1] 于涛[1] 谢金森[1] 钱金栋[1] 李庆[2] 夏榜样[2] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]中国核动力研究设计院,四川成都640041

出　　处：《南华大学学报（自然科学版）》2011年第4期13-18,共6页Journal of University of South China：Science and Technology

基　　金：核反应堆系统设计技术国家级重点实验室基金资助项目

摘　　要：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.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.

关 键 词：超临界水冷快堆 冷却剂密度分层 MOX燃料 厚blanket组件盒 负空泡反应性系数 

分 类 号：TL421.1[核科学技术—核技术及应用]