Structural Integrity for the RPV of French NPP During the LRA
Most of the French Nuclear Power Plants (NPPs) are currently embarking upon efforts to renew their operating license,while the pressurized thermal shock (PTS) events and environmentally assisted fatigue (EAF) pose potentially significant challenges to the structural integrity of the reactor pressure vessel (RPV) which has the potential to be NPP life-limiting conditions.In the assessment of the PTS events,the deterministic fracture mechanics (DFM) is still used as the basic mechanics in most countries except for the USA.While the maximum nil-ductility-transition temperature (RTNDT) is about 80oC for 54 French RPVs after 40 years operation,the maximum allowable RTNDT is only about 70 oC and 80 oC for the typical PTS events in the IAEA and NEA reports,respectively.On the other hand,the effects of light water reactor (LWR) environmental (other than moderate environment in the code) were not considered in the original design,while the effects of LWR environmental are needed to be considered in the LRA according to the USA regulations.In this paper,the challenges of the PTS and EAF are discussed,and some suggestions are also given for the LRA.
reactor pressure vessel structural integrity LRA PTS EAF
Chen Mingya Yu Weiwei Shi Jinhua Wang Rongshan Lu Feng Xue Fei Chen Zhilin
Suzhou Nuclear Power Research Institute,Suzhou,Jiangsu Province,P.R.China Amec Foster Wheeler,Gloucester GL2 4NF,UK
国际会议
2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)
天津
英文
453-457
2016-05-26（万方平台首次上网日期，不代表论文的发表时间）