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BS ISO 23467:2020

BS ISO 23467:2020

$142.49

Ice plug isolation of piping in nuclear power plant

Published By Publication Date Number of Pages
BSI 2020 24
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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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 General requirements
4.1 Personnel
4.2 Equipment
4.3 Preconditions
11 4.4 Requirements of process
4.4.1 Material of pipe
4.4.2 Freezing medium
12 4.4.3 Position of ice plug
4.4.1 Ice plug jacket
5 Preparation before operation
5.1 Working environment
5.2 Construction plan
13 5.3 Tools of construction
5.4 Protective measures
5.5 Pipe testing before operation
6 Ice plug construction
6.1 Generation of ice plug
6.2 Judgment of ice plug generation
14 6.3 Removal of ice plug
7 Quality assurance (QA) on ice plugging
7.1 QA before ice plug performance
15 7.2 QA during ice plug performance
7.3 QA after ice plug performance
8 Records and reports
16 Annex A (informative) Reference table of ice plug jacket length
17 Annex B (informative) Ice plug jacket types
22 Annex C (informative) Flow chart to perfomance of ice plug isolation measure (construction plan)
23 Bibliography

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BS ISO 23467:2020
$142.49