标准摘要
[中文适用范围]： 本文件规定了以液氮或干冰作为制冷剂（冷冻媒介）在核动力厂金属管道上应用的冰塞技术的要求。所用的冷冻液体可以是水或水混合物（如硼酸混合液）。本文件规定了冰塞生成、形成判断及取出的技术要求，以及冰塞前、冰塞中和冰塞后的措施，并对人员和无损检测提出了要求。 禁止在内衬管或内部有涂层的管道上应用冰塞隔离技术。压力试验的应用不在本文件范围内，将另行 qualification。 [外文原描述]： This document specifies requirements for the ice plug technique with liquid nitrogen or dry ice as refrigerant (cryogenic medium) on metal pipes of nuclear power plants. The freezing liquid can be water or water mixture (e.g. boric acid mixture). This document specifies technical requirements of ice plug generation, formation judgment and removal, measures before, during and after ice plugging and requirements for personnel and non-destructive testing. The application of the ice plug isolation technique is principally not allowed on cladded pipes or pipes with internal coatings. The application for pressure test is not in the scope of this document and will be qualified separately.
英文名称Ice plug isolation of piping in nuclear power plant