ISO 4917-4:2024
(Main)Design of nuclear power plants against seismic events — Part 4: Components
Design of nuclear power plants against seismic events — Part 4: Components
This document applies to nuclear power plants with water cooled reactors. For other nuclear facilities check the applicability of the document in advance, before it might be applied correspondingly. This document specifies the requirements for the earthquake safety of components. The operation-specific safety-related requirements for each component, e.g. load-bearing capacity (stability), integrity and functionality (see 4.1) are not the subject of this document. With regard to analysing the mechanical behaviour of the individual components and verifying the fulfillment of their safety related functions, additionally, the respective component-specific standards need to be consulted. In this document, the term "mechanical components" refers to components such as vessels, heat exchangers, pumps, valves, lifting gear, distribution systems and pipe lines including their support structures in as far as these components are not considered to be civil structures in accordance with ISO 4917-3. Liners, crane runways, platforms and scaffoldings are not considered as being part of these mechanical components. In this document, the term electrical components refers to the combination of electrical devices including all electrical connections and their support structures (e.g. cabinets, frames, consoles, brackets, suspensions or supports). Supplementary to this document the seismic qualification of electrical components is reported in IEC/IEEE 60980-344. NOTE This document is independent of national standards. Recommendations, given in Annex A, are mainly based on the Eurocodes-Design-Philosophy and European Standards. Alternatively other equivalent standards or regulations can be used in case the general requirements given in this document together with Annex A can be met.
Conception parasismique des installations nucléaires — Partie 4: Composants
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ISO 4917-4
First edition
Design of nuclear power plants
2024-03
against seismic events —
Part 4:
Components
Conception parasismique des installations nucléaires —
Partie 4: Composants
Reference number
ISO 4917-4:2024(en) © ISO 2024
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ISO 4917-4:2024(en)
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© ISO 2024
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© ISO 2024 – All rights reserved
ii
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ISO 4917-4:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 3
4.1 Basics .3
4.2 Verification procedure . . .4
4.3 Verification methods .5
5 Verification by analysis . 6
5.1 Summary .6
5.2 Excitation at the location of installation .6
5.2.1 Basics .6
5.2.2 Secondary responses .6
5.2.3 Tertiary responses . .7
5.2.4 Design spectra .7
5.3 Modeling .8
5.3.1 System characteristics .
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FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4917-4
ISO/TC 85/SC 6
Design of nuclear power plants against
Secretariat: DIN
seismic events —
Voting begins on:
2023-12-07
Part 4:
Voting terminates on:
Components
2024-02-01
Conception parasismique des installations nucléaires —
Partie 4: Composants
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 4917-4:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
---------------------- Page: 1 ----------------------
ISO/FDIS 4917-4:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4917-4
ISO/TC 85/SC 6
Design of nuclear power plants against
Secretariat: DIN
seismic events —
Voting begins on:
Part 4:
Voting terminates on:
Components
Conception parasismique des installations nucléaires —
Partie 4: Composants
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 4917-4:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 4917-4:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 3
4.1 Basics . 3
4.2 Verification procedure . . . 4
4.3 Verification methods . 5
5 Verification by analysis . 6
5.1 Summary . 6
5.2 Excitation at the location of installation .
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ISO/FDIS 4917-4:2023(E)
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ISO/TC 85/SC 6/WG 3 .
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Secretariat: DIN
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Design of nuclear power plants against seismic events —
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Part 4: Style Definition
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Components .
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Conception parasismique des installations nucléaires —
Partie 4: Composants
FDIS stage
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ISO/FDIS 4917-4:2023(E)
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ISO copyright office
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CP 401 • Ch. de Blandonnet 8 • CP 401
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CH-1214 Vernier, Geneva, Switzerland
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© ISO 2023 – All rights reserved
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© ISO 2023 – All rights reserved iii
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ISO/FDIS 4917-4:2023(E)
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Contents Page
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Foreword . viii
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Introduction.ix
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements . 3
4.1 Basics . 3
4.2 Verification procedure . 5
4.3 Verification method
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