原子能科学技术Issue(4)：622-629,8.DOI:10.7538/yzk.2014.48.04.0622
COB RA-Ⅳ对8×8棒束计算的不确定性分析
Uncertainty Analysis on COBRA-Ⅳ Calculation of 8 × 8 Bundle Experiment
摘要
Abstract
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 ,w hich 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 w hich are the most important sub-channels is about -5.5%-6% .关键词
不确定性分析/子通道程序/空泡份额/容忍限Key words
uncertainty analysis/sub-channel code/void fraction/tolerance limit分类
能源科技引用本文复制引用
杜芸,刘晓晶,程旭..COB RA-Ⅳ对8×8棒束计算的不确定性分析[J].原子能科学技术,2014,(4):622-629,8.基金项目
博士点新教师基金资助项目 （）
