文献类型：期刊文献

英文题名：Evaluation of irradiation embrittlement of the weld metals in the Chinese RPV

作者：Cao, Yupeng[1]; Huang, Yifeng[1]; Yu, Yan[1]; Hui, Hu[2]; He, Yinbiao[1]; Wang, Binxi[1]; Li, Hui[1]

机构：[1] Department of Component Research and Design, Shanghai Nuclear Engineering Research and Design Institute, Shanghai, 200233, China; [2] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2020

卷号：2

外文期刊名：International Conference on Nuclear Engineering, Proceedings, ICONE

收录：EI(收录号：20204509464348)

基金：The financial support of the National Science and Technology Major Project of the Ministry of Science and Technology of China (2010ZX06001-002, 2011ZX06002-002 and 2012ZX06004-021) is gratefully acknowledged.

语种：英文

外文关键词：Neutron irradiation - Radiation - Nuclear fuels - Tensile testing - Welds - Degradation - Nuclear power plants - Embrittlement - Fracture toughness - Charpy impact testing - Pressure vessels

摘要：Reactor pressure vessel (RPV) operates under high temperatures and pressures and is exposed to relatively high neutron radiation. RPV is considered to be irreplaceable, which is the most limiting factor for the lifetime of a nuclear power plant. As the most severe ageing degradation mechanism in RPV materials, irradiation embrittlement is a major issue affecting the integrity through the service life of a RPV. Our previous paper (ASME PVP2019-93615[1]) introduced our project for assessment of irradiation embrittlement of the materials for the Chinese RPVs to verify the 60-year design life, in which the specimens made of the RPV base material manufactured in China, the SA-508 Gr.3 Cl.1 forging, and the different types of weld metals were irradiated in the high fluence engineering test reactor (HFETR). The paper analyzed extent irradiation damage of the forging in terms of mechanical properties. As another part of the project, this paper concentrates on the evaluation of the weld metals in the same project. Tensile tests, Charpy impact tests and fracture toughness tests by master curve approach were carried out for the three types of weld metals subjected to different irradiation fluences (2.6E19n/cm2, 8.9E19n/cm2). Comparison of the mechanical properties of the irradiated and the unirradiated materials is made. The irradiation resistance of the weld metals in our project is also compared with the data in the literatures. Copyright ? 2020 ASME