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Nuclear power plants —Instrumentation and controlimportant to safety —Selection and use of industrial digital devices of limited functionality

BS IEC 62671:2013

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National foreword

This British Standard is the UK implementation of IEC 62671:2013.

The UK participation in its preparation was entrusted to Technical CommitteeNCE/8, Reactor instrumentation.

A list of organizations represented on this committee can be obtained onrequest to its secretary.

This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.

© The British Standards Institution 2013

Published by BSI Standards Limited 2013

ISBN 978 0 580 71956 1

ICS 27.120.20

Compliance with a British Standard cannot confer immunity fromlegal obligations.

This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2013.

Amendments issued since publication

Amd. No. Date Text affected

BRITISH STANDARDBS IEC 62671:2013

This is a preview of "BS IEC 62671:2013". Click here to purchase the full version from the ANSI store.

https://webstore.ansi.org/Standards/BSI/BSIEC626712013?source=preview

IEC 62671 Edition 1.0 2013-02

INTERNATIONAL STANDARD NORME INTERNATIONALE

Nuclear power plants – Instrumentation and control important to safety – Selection and use of industrial digital devices of limited functionality Centrales nucléaires de puissance – Instrumentation et contrôle-commande importants pour la sûreté – Sélection et utilisation des appareils numériques à fonctionnalités limitées

INTERNATIONAL ELECTROTECHNICAL COMMISSION

COMMISSION ELECTROTECHNIQUE INTERNATIONALE XA ICS 27.120.20

PRICE CODE CODE PRIX

ISBN 978-2-83220-630-0

® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale

®

Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

BS IEC 62671:2013

This is a preview of "BS IEC 62671:2013". Click here to purchase the full version from the ANSI store.

https://webstore.ansi.org/Standards/BSI/BSIEC626712013?source=preview

– 2 – 62671 © IEC:2013

CONTENTS

FOREWORD ........................................................................................................................... 4 INTRODUCTION ..................................................................................................................... 6 1 Scope ............................................................................................................................... 9

1.1 General ................................................................................................................... 9 1.2 Background ........................................................................................................... 10 1.3 Use of this standard .............................................................................................. 10 1.4 Framework ............................................................................................................ 11

2 Normative references ..................................................................................................... 12 3 Terms and definitions ..................................................................................................... 13 4 Symbols and abbreviations ............................................................................................. 19 5 General requirements ..................................................................................................... 19

5.1 General ................................................................................................................. 19 5.2 Application of this standard ................................................................................... 20

5.2.1 General ..................................................................................................... 20 5.2.2 Applicability criteria for this standard ......................................................... 20

5.3 General requirements on the evaluation process ................................................... 21 5.3.1 Evaluation process .................................................................................... 21 5.3.2 Evaluation and Application Plan (EAP) ...................................................... 22 5.3.3 Evaluation and Application Report (EAR) ................................................... 23 5.3.4 Application of clauses of this standard ....................................................... 24

6 Criteria for functional and performance suitability ........................................................... 25 6.1 General ................................................................................................................. 25 6.2 Functional competence of the primary function ...................................................... 25 6.3 Ancillary functions ................................................................................................. 26 6.4 Configurability ....................................................................................................... 26 6.5 Superfluous functions ............................................................................................ 27 6.6 Hardware robustness ............................................................................................ 28 6.7 Reliability, maintainability and testability ............................................................... 28 6.8 Cyber security ....................................................................................................... 30 6.9 User documentation for safety ............................................................................... 30

7 Criteria for dependability – Evidence of correctness ....................................................... 31 7.1 General ................................................................................................................. 31 7.2 Previous certification ............................................................................................. 33 7.3 Avoidance of systematic faults .............................................................................. 34 7.4 Evidence of quality in the design process .............................................................. 36

7.4.1 General ..................................................................................................... 36 7.4.2 Product designer’s QA program ................................................................. 36 7.4.3 Design and development process .............................................................. 37 7.4.4 Design configuration management ............................................................. 38 7.4.5 Design change control ............................................................................... 38 7.4.6 Design documentation ............................................................................... 39

7.5 Evidence of quality in manufacturing ..................................................................... 40 7.6 Product stability ..................................................................................................... 41 7.7 Operating experience ............................................................................................ 42 7.8 Complementary testing and/or analysis (verification) ............................................. 43

BS IEC 62671:2013

This is a preview of "BS IEC 62671:2013". Click here to purchase the full version from the ANSI store.

https://webstore.ansi.org/Standards/BSI/BSIEC626712013?source=preview