重水堆压力管延迟氢化物开裂行为研究进展  

Research Progress on Delayed Hydrides Cracking Behavior of Heavy Water-Reactor Pressure Tube

作　　者：潘春婷 明洪亮 石秀强[3] 鲍一晨[3] 王俭秋 韩恩厚[2,4] AN Chunting;MING Hongliang;SHI Xiuqiang;BAO Yichen;WANG Jianqiu;HAN En-Hou(School of Materials of Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Shanghai Nuclear engineering Research and Design Institute Co.,Ltd.,Shanghai 200233,China;Institute of Corrosion Science and Technology,Guangzhou 510530,China)

机构地区：[1]中国科学技术大学材料科学与工程学院,沈阳110016 [2]中国科学院金属研究所,沈阳110016 [3]上海核工程研究设计院股份有限公司,上海200233 [4]广东腐蚀科学与技术创新研究院,广州510530

出　　处：《中国腐蚀与防护学报》2025年第2期307-318,共12页Journal of Chinese Society For Corrosion and Protection

基　　金：中国科学院青年创新促进会(2022187)。

摘　　要：压力管是重水堆中重要的结构部件,其服役性能是确保重水堆安全稳定运行的关键。延迟氢化物开裂(DHC)是压力管服役过程中最重要的潜在风险之一,因此研究压力管的DHC行为具有重要的意义。本文就DHC行为测试的实验方法、机理和模型以及DHC行为的影响因素等方面的研究进展进行综述,并指出目前研究存在的不足和未来的发展趋势。Zr-2.5Nb alloy pressure tubes are important structural components in heavy-water reactor.During operation of a heavy-water reactor,a large amount of hydrogen isotopes is produced by the corrosion reaction between the pressure tubes and the heavy-water coolant.Some of the hydrogen isotopes can be absorbed into the pressure tube.When the concentration of hydrogen atoms exceeds the solid solubility of hydrogen in Zr-2.5Nb alloy,hydrides are precipitated.The precipitation of hydrides will lead to deterioration of mechanical properties of Zr-2.5Nb alloy,and then leads to the expansion of microcracks inside the pressure tubes.The phenomenon is called Delayed hydrides cracking(DHC)which is one of the most important potential risks during the service of pressure tubes.Therefore,it is of great significance to study the DHC behavior of pressure tube.In this paper,the research progress on the testing methods for DHC behavior,the relevant mechanisms and models as well as the influencing factors of DHC behavior are reviewed, and the shortcomings of current researches and the future development trends are pointed out.

关 键 词：重水堆 压力管 Zr-2.5Nb合金 延迟氢化物开裂 

分 类 号：TG174[金属学及工艺—金属表面处理]