摘要
针对反应堆压力容器承压热冲击分析中较普遍采用的结构临界失效状态下材料韧脆转变温度(RTNDT)参数存在局限性的问题,和同时分析热应力载荷与内压载荷时难以区分不同载荷类型对结构安全性能影响差别的问题,基于结构安全裕量准则,通过三维数值模拟,分别研究了热应力载荷与内压载荷对反应堆压力容器堆芯筒体段裂纹前沿最深点和界面点(母材与堆焊层界面处)处的起裂和止裂性能的影响。分析中考虑了裂纹尺寸、裂纹前沿温度和中子注量沿容器壁厚方向上分布等因素的影响。
Focused on the two questions of the pressured thermal shock （PTS） of the reactor pressure vessel （RPV）： 1） there are some limitations for the commonly used parameter of the critical ductile-brittle transition temperature （RTNDT）; 2） and it is difficult to distinguish the influence between the thermal load and the pressure load in the combined analysis, the safety margin （SM） parameter is used to assess the safety of the crack deepest points and interface points along the crack front through 3-D finite element method in this paper. Both crack initiation assessment and crack arrest assessment are considered. A series of crack models are established, and the influence of the distribution of neutron fluence and temperature along the thickness direction are also included in the analysis.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第20期5272-5277,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(51435012
51275338)~~
关键词
反应堆压力容器
承压热冲击
确定性断裂力学
安全裕量
有限元
reactor pressure vessel
pressured thermalshock
deterministic fracture mechanics
safety margin
finiteelement
