ISO 20890-5:2020
(Main)Guidelines for in-service inspections for primary coolant circuit components of light water reactors — Part 5: Eddy current testing of steam generator heating tubes
Guidelines for in-service inspections for primary coolant circuit components of light water reactors — Part 5: Eddy current testing of steam generator heating tubes
This document gives guidelines for pre-service inspection (PSI) and in-service inspections (ISI) by eddy current tests on non-ferromagnetic steam generator heating tubes of light water reactors, whereby the test is carried out using mechanised test equipment outwards from the tube inner side. An in-service eddy current test of steam generator heating tube plugs as a component of the primary circuit is not an object of this document. Owing to the different embodiments of steam generator heating tube plugs, the use of specially adapted test systems to be qualified is necessary. Test systems for the localisation of inhomogeneities (surface) and requirements for test personnel, test devices, the preparation of test and device systems, the implementation of the testing as well as the recording are defined. NOTE Data concerning the test section, test extent, inspection period, inspection interval and evaluation of indications is defined in the nuclear safety standards. It is recommended that the technical specifications are based on experience on U-tube bends with even bend radius (similar to the S/KWU design). To test other kind of tube bends (e.g. U-tube bends with two 90° bends) further qualifications will be provided.
Lignes directrices pour les contrôles périodiques des composants du circuit primaire des réacteurs à eau légère — Partie 5: Essai de tuyaux de chauffage pour générateurs de vapeur par courant de Foucault
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INTERNATIONAL ISO
STANDARD 20890-5
First edition
2020-06
Guidelines for in-service inspections
for primary coolant circuit
components of light water reactors —
Part 5:
Eddy current testing of steam
generator heating tubes
Lignes directrices pour les contrôles périodiques des composants du
circuit primaire des réacteurs à eau légère —
Partie 5: Essai de tuyaux de chauffage pour générateurs de vapeur
par courant de Foucault
Reference number
©
ISO 2020
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Inspection technique. 3
4.1 Preliminary remark . 3
4.2 General . 4
4.3 Standard technique . 4
4.3.1 Multiple frequency technique with internal bobbin probe in differential
arrangement . 4
4.3.2 Linking the signals of multiple frequencies with internal bobbin probe in
differential arrangement (mixed technique) . 5
4.3.3 Multifrequency system with internal bobbin probe in absolute arrangement. 5
4.4 Inspection techniques for more extensive analyses . 5
5 Requirements . 6
5.1 Test personnel . 6
5.1.1 Task of NDT personnel . . 6
5.1.2 Personnel requirements . 6
5.2 Steam generator heating tubes . 7
5.3 Eddy current test equipment . 8
5.3.1 General. 8
5.3.2 Test robot . 8
5.3.3 Eddy current test system . 9
5.3.4 Assistant analysis system .10
5.4 Data storage medium .11
6 Testing .11
6.1 General .11
6.2 Preparations .11
6.3 Implementation .11
6.3.1 General.11
6.3.2 Data acquisition .12
6.3.3 Data analysis .13
6.4 Final measures .15
7 Recording .15
7.1 Test record and test report .15
7.2 Indication list .15
7.3 Findings record .15
Annex A (informative) General test procedure .17
Bibliography .19
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by ISO/TC 85, Nuclear energy, nuclear technologies, and radiological
protection, Subcommittee SC 6, Reactor technology.
A list of all parts in the ISO 20890 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
INTERNATIONAL STANDARD ISO 20890-5:2020(E)
Guidelines for in-service inspections for primary coolant
circuit components of light water reactors —
Part 5:
Eddy current testing of steam generator heating tubes
1 Scope
This document gives guidelines for pre-service inspection (PSI) and in-service inspections (ISI) by eddy
current tests on non-ferromagnetic steam generator heating tubes of light water reactors, whereby the
test is carried out using mechanised test equipment outwards from the tube inner side.
An in-service eddy current test of steam generator heating tube plugs as a component of the primary
circuit is not an object of this document. Owing to the different embodiments of steam generator
heating tube plugs, the use of specially adapted test systems to be qualified is necessary.
Test systems for the localisation of inhomogeneities (surface) and requirements for test personnel, test
devices, the preparation of test and device systems, the implementation of the testing as well as the
recording are defined.
NOTE Data concerning the test section, test extent, inspection period, inspection interval and evaluation of
indications is defined in the nuclear safety standards.
It is recommended that the technical specifications are based on experience on U-tube bends with even
bend radius (similar to the S/KWU design). To test other kind of tube bends (e.g. U-tube bends with two
90° bends) further qualifications will be provided.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 8596, Ophthalmic optics — Visual acuity testing — Standard and clinical optotypes and their
presentation
ISO 9712:2012, Non-destructive testing — Qualification and certification of NDT personnel
ISO 12718, Non-destructive testing — Eddy current testing — Vocabulary
ISO 15548-1, Non-destructive testing — Equipment for eddy current examination — Part 1: Instrument
characteristics and verification
ISO 15548-2, Non-destructive testing — Equipment for eddy current examination — Part 2: Probe
characteristics and verification
ISO 15548-3, Non-destructive testing — Equipment for eddy current examination — Part 3: System
characteristics and verification
ISO 15549, Non-destructive testing — Eddy current testing — General principles
ISO 18490, Non-destructive testing — Evaluation of vision acuity of NDT personnel
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12718 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
analysis system
test system that is used with scanning sensors or segment sensors at steam
generator heating tubes for more precise characterisation of indications (3.2)
3.2
indication
representation or signal from a discontinuity in the format allowed by the NDT method used
[SOURCE: ISO/TS 18173:2005, 2.14]
Note 1 to entry: Signal that is initiated by operationally induced damage mechanisms, geometrical as well as
material or design induced influences.
3.3
evaluation
assessment (3.5) of indications (3.2) revealed by NDT against a predefined level
Note 1 to entry: Inspection of the recorded signals in res
...
INTERNATIONAL ISO
STANDARD 20890-5
First edition
2020-06
Guidelines for in-service inspections
for primary coolant circuit
components of light water reactors —
Part 5:
Eddy current testing of steam
generator heating tubes
Lignes directrices pour les contrôles périodiques des composants du
circuit primaire des réacteurs à eau légère —
Partie 5: Essai de tuyaux de chauffage pour générateurs de vapeur
par courant de Foucault
Reference number
©
ISO 2020
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Inspection technique. 3
4.1 Preliminary remark . 3
4.2 General . 4
4.3 Standard technique . 4
4.3.1 Multiple frequency technique with internal bobbin probe in differential
arrangement . 4
4.3.2 Linking the signals of multiple frequencies with internal bobbin probe in
differential arrangement (mixed technique) . 5
4.3.3 Multifrequency system with internal bobbin probe in absolute arrangement. 5
4.4 Inspection techniques for more extensive analyses . 5
5 Requirements . 6
5.1 Test personnel . 6
5.1.1 Task of NDT personnel . . 6
5.1.2 Personnel requirements . 6
5.2 Steam generator heating tubes . 7
5.3 Eddy current test equipment . 8
5.3.1 General. 8
5.3.2 Test robot . 8
5.3.3 Eddy current test system . 9
5.3.4 Assistant analysis system .10
5.4 Data storage medium .11
6 Testing .11
6.1 General .11
6.2 Preparations .11
6.3 Implementation .11
6.3.1 General.11
6.3.2 Data acquisition .12
6.3.3 Data analysis .13
6.4 Final measures .15
7 Recording .15
7.1 Test record and test report .15
7.2 Indication list .15
7.3 Findings record .15
Annex A (informative) General test procedure .17
Bibliography .19
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by ISO/TC 85, Nuclear energy, nuclear technologies, and radiological
protection, Subcommittee SC 6, Reactor technology.
A list of all parts in the ISO 20890 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
INTERNATIONAL STANDARD ISO 20890-5:2020(E)
Guidelines for in-service inspections for primary coolant
circuit components of light water reactors —
Part 5:
Eddy current testing of steam generator heating tubes
1 Scope
This document gives guidelines for pre-service inspection (PSI) and in-service inspections (ISI) by eddy
current tests on non-ferromagnetic steam generator heating tubes of light water reactors, whereby the
test is carried out using mechanised test equipment outwards from the tube inner side.
An in-service eddy current test of steam generator heating tube plugs as a component of the primary
circuit is not an object of this document. Owing to the different embodiments of steam generator
heating tube plugs, the use of specially adapted test systems to be qualified is necessary.
Test systems for the localisation of inhomogeneities (surface) and requirements for test personnel, test
devices, the preparation of test and device systems, the implementation of the testing as well as the
recording are defined.
NOTE Data concerning the test section, test extent, inspection period, inspection interval and evaluation of
indications is defined in the nuclear safety standards.
It is recommended that the technical specifications are based on experience on U-tube bends with even
bend radius (similar to the S/KWU design). To test other kind of tube bends (e.g. U-tube bends with two
90° bends) further qualifications will be provided.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 8596, Ophthalmic optics — Visual acuity testing — Standard and clinical optotypes and their
presentation
ISO 9712:2012, Non-destructive testing — Qualification and certification of NDT personnel
ISO 12718, Non-destructive testing — Eddy current testing — Vocabulary
ISO 15548-1, Non-destructive testing — Equipment for eddy current examination — Part 1: Instrument
characteristics and verification
ISO 15548-2, Non-destructive testing — Equipment for eddy current examination — Part 2: Probe
characteristics and verification
ISO 15548-3, Non-destructive testing — Equipment for eddy current examination — Part 3: System
characteristics and verification
ISO 15549, Non-destructive testing — Eddy current testing — General principles
ISO 18490, Non-destructive testing — Evaluation of vision acuity of NDT personnel
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12718 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
analysis system
test system that is used with scanning sensors or segment sensors at steam
generator heating tubes for more precise characterisation of indications (3.2)
3.2
indication
representation or signal from a discontinuity in the format allowed by the NDT method used
[SOURCE: ISO/TS 18173:2005, 2.14]
Note 1 to entry: Signal that is initiated by operationally induced damage mechanisms, geometrical as well as
material or design induced influences.
3.3
evaluation
assessment (3.5) of indications (3.2) revealed by NDT against a predefined level
Note 1 to entry: Inspection of the recorded signals in res
...
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