THERMAL AGING PERFORMANCE OF DOMESTIC CAST AUSTENITIC STAINLESS STEELS IN NUCLEAR POWER PLANTS

摘要：

　　The domestic cast austenitic stainless steels(CASS)used for PWR main coolant lines face thermal aging phenomenon during long-term service at reactor operating temperatures in the range of 280–320℃.The accelerated thermal aging experiment of CASS at an elevated temperature of 400℃ was carried out.The decrease regularity of absorbed energy of CASS at room temperature was obtained by Charpy impact test,and the variation trend of impacted specimens fracture surfaces of CASS at different aging time was observed by scanning electron microscope.The experimental results show that: after 15,000 hours of accelerated thermal aging,the domestic CASS gradually reaches a thermal aging saturation,and its absorbed energy suffers a dramatic loss,dropping to almost 41-45%of the initial value,but still meets the assessment indicators for unaged state required by design specifications.

关键词： NPP Main Coolant Line Cast Austenitic Stainless Steel Thermal Aging Accelerated Experiment Absorbed Energy

作者: LI Chengliang DENG Xiaoyun YIN Zhiying DUAN Yuangang

作者单位: China Nuclear Power Design Company,LTD Room 2001,Building 5,TianAn Cyberpark,Huangge Road Shenzhen,518172,China

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 481-486

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）