本文件规定了核电厂金属管道上使用液氮或干冰作为制冷剂（低温介质）的冰塞技术的要求。冷冻液可以是水或水混合物（例如硼酸混合物）。 本文件规定了冰塞生成、地层判断和移除的技术要求，冰塞前、冰塞中和冰塞后的措施，以及对人员和无损检测的要求。 原则上不允许在覆层管道或带有内部涂层的管道上应用冰塞隔离技术。压力试验的申请不在本文件的范围内，将单独进行鉴定。

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.