摘要
为评价输入参数对反应堆压力容器特定运行事件下失效概率计算结果的影响,建立了反应堆压力容器概率断裂力学计算模型,对计算所用主要参数进行敏感性分析,得到了缺陷类型及形状、辐照脆化程度、材料化学成分及温预应力对容器失效概率的影响,并分析了各参数的敏感程度.结果表明:输入参数的可靠性是保证概率断裂力学分析结果可靠有效的前提,材料化学成分及缺陷深度等参数对计算结果有重要影响.
To evaluate probability under speci the effects of input parameters on the calculation results of reactor vessel failure fie operation conditions, a calculation model for probabilistic fracture mechanics of reactor pressure vessel(RPV) was established for sensitivity analysis on main parameters applied in the cal- culation, so as to study the influence of various factors on the RPV failure probability, such as the defect type and shape, irradiation embrittlement degree, material chemical composition and warm pre-stressing, etc. , and to analyze the sensitivity of each parameter. Results show that reliable input parameters are the prerequisite to ensure the reliability and validity of analysis results for probabilistic fracture mechanics. In addition, the material chemical composition and defect depth are key factors influencing the calculation results.
出处
《动力工程学报》
CAS
CSCD
北大核心
2017年第2期163-166,172,共5页
Journal of Chinese Society of Power Engineering
基金
国家科技重大专项资助项目(2015ZX06002005)
关键词
反应堆压力容器
概率断裂力学
参数
不确定性
reactor pressure vessel
probabilistic fracture mechanics
parameter
uncertainty