压水堆核电厂堆内构件结构材料优化选择

摘要

堆内构件是反应堆内部的关键设备，属安全相关级。由于长期工作在高温、高压和高辐照的环境条件，对堆内构件材料的要求较高。结合不同国家堆内构件常用牌号的几种不锈钢材料，分析了它们的耐腐蚀性能、焊接性以及辐照性能等，从而给出了推荐的材料选择。%As a key equipment, reactor vessel internals (RVI) influence the safety of nuclear power plant. There is a rigid requirement for the structural material of reactor vessel inter-nals because of the high temperature, high pressure and high dose irradiation. Combining the stainless steel usually used in different nations, the paper analyzes the corrosion resistance prop-erty, weldability and irradiation property and recommends the optimum stock option.