19/30402591 DC - BS ISO 20890-1.2. Guidelines for in-service inspections for primary coolant circuit components of light water reactors. Part 1. Mechanized ultrasonic testing

19/30402591 DC

BS ISO 20890-1.2. Guidelines for in-service inspections for primary coolant circuit components of light water reactors. Part 1. Mechanized ultrasonic testing

Status : Current, Draft for public comment   Published : September 2019

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This document gives guidelines for pre-service-inspections (PSI) and in-service inspections (ISI) with mechanized ultrasonic test (UT) devices on components of the reactor coolant circuit of light water reactors. This document is also applicable on other components of nuclear installations.

Mechanized ultrasonic inspections are carried out in order to enable an evaluation in case of

  • fault indications (e.g. on austenitic weld seams or complex geometry),

  • indications due to geometry (e.g. in case of root concavity),

  • complex geometries (e.g. fitting weld seams), or

  • if a reduction in the radiation exposure of the test personnel can be attained in this way.

Ultrasonic test methods are defined for the validation of discontinuities (volume or surface open), requirements for the ultrasonic test equipment, for the preparation of test and device systems, for the implementation of the test and for the recording.

This document is applicable for the detection of indications by UT using normal-beam probes and angle-beam probes both in contact technique. It is to be used for UT examination on ferritic and austenitic welds and base material as search techniques and for comparison with acceptance criteria by the national referencing nuclear safety standards. Immersion technique and techniques for sizing are not in the scope of this document and should be independent qualified.

NOTE

Data concerning the test section, test extent, inspection period, inspection interval and evaluation of indications is defined in the applicable national nuclear safety standards.

Unless otherwise specified in national nuclear safety standards the minimum requirements of this International Standard are applicable. This Standard does not define:

—   Extent of examination and scanning plans

—   Acceptance criteria

—   UT techniques dissimilar welds and for sizing (have to be qualified separately)

—   Immersion techniques

It is recommended that UT examinations are nearly related to the component, the type and size of defects to be considered and must be reviewed in specific national inspection qualifications.




Standard Number19/30402591 DC
TitleBS ISO 20890-1.2. Guidelines for in-service inspections for primary coolant circuit components of light water reactors. Part 1. Mechanized ultrasonic testing
StatusCurrent, Draft for public comment
Publication Date04 September 2019
Normative References(Required to achieve compliance to this standard)ISO 8596, ISO 16811:2012, EN 12668-2, ISO 9712, EN 12668-1, ISO 18563-2, ISO 18490, ISO 5577, ISO 18563-1
Informative References(Provided for Information)EN 1330-2, ISO 7963, ISO 2400, ISO/TS 18173, EN 1330-4:2010
International RelationshipsISO/DIS 20890-1.2
Draft Expiry Date22 September 2019
DescriptorsQualification approval, Fusion welding, Steels, Metals, Mechanical testing, Approval testing, Nickel, Arc welding, Gas welding, Nickel alloys, Process specification, Welding
ICS27.120.10
Title in FrenchTitre matre — Partie 1: Contrôle mechanique par ultrasons
CommitteeE/-
PublisherBSI
FormatA4
DeliveryYes
Pages40
File Size621 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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