摘要
综合现有不确定性分析方法的原理及特点,采用Wilks公式确定需要计算的最小次数,研究针对子通道程序不确定性的分析方法,并编写程序。运用该程序对8×8棒束的出口空泡份额实验的子通道计算进行了不确定性分析与研究,得到了每个子通道出口空泡份额的计算预测值,以及满足容忍限的不确定性上、下限。计算结果表明：边角子通道的计算不确定性较小,约为±5.5%;而水棒周围不规则形状的子通道的不确定性较大,约为±9%。堆芯热工水力问题中最关注的高空泡子通道的出口空泡份额,其不确定性为-5.5%~6%。
For the uncertainty analysis,the Wilks’ formula was employed to identify the minimum runs and the upper and lower limits of the calculation.An uncertainty analysis method and program for sub-channel code were developed based on the existing uncertainty analysis method.The void fraction predicted by the sub-channel code was compared with the uncertainty limit.The results show that the uncertainty of the side and the corner sub-channel is smaller,which is about±5.5%;the uncertainty of the sub-channel around the water rod inside the bundle is bigger,which is about±9%.The uncertainty of high void fraction sub-channels which are the most important subchannels is about-5.5%-6%.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2014年第4期622-629,共8页
Atomic Energy Science and Technology
基金
博士点新教师基金资助项目(20110073120045)
关键词
不确定性分析
子通道程序
空泡份额
容忍限
uncertainty analysis
sub-channel code
void fraction
tolerance limit
