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NBN ISO 23467:2021
Ice plug isolation of piping in nuclear power plant
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Summary
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.
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.
Technical characteristics
| Publisher | Bureau de Normalisation Belge (NBN) |
| Publication Date | 06/24/2021 |
| Page Count | 24 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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24/06/2021
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