1.1 本指南涵盖了在运行的核电站中建立监控涂层服务等级III衬里（和涂层）系统性能的程序。监测是评估在役衬砌系统状况的持续过程。 1.2 受本指南约束的涂层服务三级衬里系统通常适用于包括原水、冷凝水质量水或燃油润湿（即完全或间歇浸入）表面的金属基材，该系统可能包括: 1.2.1 安全相关部件上游的厂用水管道， 1.2.2 厂用水泵内部构件（尾水管、蜗壳和扩散器）， 1.2.3 厂用水热交换器，包括通道、通道隔板、管板、端盖和盖 1.2.4 厂用水过滤器， 1.2.5 反应堆水储罐（RWST）， 1.2.6 换料腔储水箱， 1.2.7 反应堆补给水系统， 1.2. 8. 设备冷却水系统， 1.2.9 安全相关设备的润滑油箱，以及 1.2.10 应急柴油燃油系统。 1.3 本指南旨在为制定衬砌监测计划提供推荐依据，而不是为所有计划规定单一依据。根据许可承诺，本指南中所述程序的变更或简化可能适用于任何给定的运行核电站。类似的指南可能适用于某些涂层服务级别II应用，如流体浸泡系统。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 建立在役衬里监测计划允许根据需要规划和优先安排衬里维护工作，以保持核涂层服务三级系统中的衬里完整性和性能。参考ASTM MNL-8， 核电站维护涂层手册 , 7. 和指南 D7230 ，为安全相关衬里系统的新施工或维护选择衬里材料提供指导。 4.2 衬砌监测计划能够早期识别和检测衬砌系统中的潜在问题。一些涂层服务等级为三级的衬里系统可能事先被发现可疑、有缺陷或退化。监测衬砌性能将有助于制定后续程序，以解决与衬砌工程相关的任何重大缺陷。 4.3 在正常操作和测试过程中，或在可能对安全性能产生不利影响的失常条件下，劣化衬里可能会产生碎屑- 相关系统。在大多数情况下，碎屑产生的后果是流阻塞、基本传热减少或两者兼而有之；最终导致设备或系统性能下降。可能需要一个衬里监测计划来履行涂层服务三级衬里工作的许可承诺。

1.1 This guide covers procedures for establishing a program to monitor the performance of Coating Service Level III lining (and coating) systems in operating nuclear power plants. Monitoring is an ongoing process of evaluating the condition of the in-service lining systems. 1.2 Coating Service Level III lining systems subject to this guide are generally those applied to metal substrates comprising raw water, condensate-quality water, or fuel oil wetted (that is, full or intermittent immersion) surfaces in systems that may include: 1.2.1 Service water piping upstream of safety-related components, 1.2.2 Service water pump internals (draft tube, volutes, and diffusers), 1.2.3 Service water heat exchangers including the channels, pass partitions, tubesheets, end bells, and covers 1.2.4 Service water strainers, 1.2.5 Reactor water storage tanks (RWSTs), 1.2.6 Refuel cavity water storage tanks, 1.2.7 Reactor makeup water system, 1.2.8 Component cooling water system, 1.2.9 Lube oil tanks for safety-related equipment, and 1.2.10 Emergency diesel fuel oil system. 1.3 It is the intent of this guide to provide a recommended basis for establishing a linings monitoring program, not to mandate a singular basis for all programs. Variations or simplifications of the program described in this guide may be appropriate for any given operating nuclear power plant depending on its licensing commitments. Similar guidelines may be applicable for certain Coating Service Level II applications such as fluid immersion systems. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Establishment of an in-service linings monitoring program permits planning and prioritization of lining maintenance work as needed to maintain lining integrity and performance in nuclear Coating Service Level III systems. Refer to ASTM MNL-8, Manual on Maintenance Coatings for Nuclear Power Plants , 7 and Guide D7230 , which provides guidance for selecting lining materials for new construction or maintenance of safety-related lining systems. 4.2 A linings monitoring program enables early identification and detection of potential problems in lining systems. Some Coating Service Level III lining systems may be known in advance to be suspect, deficient, or degraded. Monitoring lining performance will assist in developing follow-up procedures to resolve any significant deficiency relative to lining work. 4.3 Degraded linings may generate debris under normal operation and testing or during upset conditions that could adversely affect the performance of safety-related systems. In most cases, the consequence of the debris generation is flow blockage, essential heat transfer reduction, or both; ultimately leading to degradation of equipment or system performance. A linings monitoring program may be required to fulfill licensing commitments for Coating Service Level III lining work.