工程经验反馈及有关研究表明，轻水反应堆核电厂二回路汽水管道在管道内流体长期作用下，可能会发生流动加速腐蚀、液滴冲击和汽蚀等老化，从而导致管道母材或焊缝发生局部减薄的老化劣化现象。如不进行有效的预防性检测和系统的主动管理，可能会导致管道局部泄漏或破裂。扼要介绍上述老化机理、老化效应、易发生部位、影响因素以及国内外的主要管理方法和实践。重点探讨了检测方法、检测部位、标准化等管理和应对措施的现状、挑战和发展趋势。

Engineering feed-backs and research results show that the secondary loop steam & water piping in light water reactor power plants, with the long-term operation of inner-fluid, may suffer from the following aging and degradation phenomena such as flow accelerated corrosion, liquid droplet impingement, cavitation erosion, etc., which may lead to the localized thinning of base metal or weld joint in the pipeline. Without predictive inspection and proactive aging management, the sensitive pipeline may experience local leakage, fracture or rupture. This paper briefly introduces above mentioned aging mechanism, aging effects, sensitive locations, affecting factors, as well as the management methods and practices at home and abroad. The art of status, application and development trend of pipe wall-thickness thinning inspection methods, inspection location, standardization are discussed in detail.