IEC 62646:2016

IEC 62646 ®
Edition 2.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Nuclear power plants – Control rooms – Computer-based procedures

Centrales nucléaires de puissance – Salles de commande – Procédures
informatisées
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IEC 62646 ®
Edition 2.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Nuclear power plants – Control rooms – Computer-based procedures

Centrales nucléaires de puissance – Salles de commande – Procédures

informatisées
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.120.20 ISBN 978-2-8322-3650-5

– 2 – IEC 62646:2016 © IEC 2016
CONTENTS
FOREWORD . 5
INTRODUCTION . 8
1 Scope . 11
1.1 Object of this standard . 11
1.2 Context leading to development and use of CPB . 11
1.3 CBP overview . 11
1.4 Use of this standard with related standards . 12
1.5 Organisation of this standard . 12
2 Normative references. 13
3 Terms and definitions . 14
4 Abbreviated terms . 16
5 CBP policy and conceptual requirements. 16
5.1 General . 16
5.2 Computerisation policy . 17
5.2.1 General . 17
5.2.2 Rationale underlying the implementation of CBP . 17
5.2.3 The scope of CBP . 18
5.3 Families of CBP . 19
5.4 Overview of computerisation features . 20
5.4.1 General . 20
5.4.2 Global requirements for computerisation . 20
5.4.3 Provision of guidance to operator . 21
5.4.4 Provision of procedure based automation . 22
5.5 Output documentation . 22
5.6 Design extension conditions . 23
6 Contexts of use of CBP . 23
6.1 General . 23
6.2 Application environments of CBP use . 23
6.2.1 General . 23
6.2.2 Use of CBP in computerised control rooms . 23
6.2.3 Use of CBP in a conventional or hybrid main control room . 24
6.2.4 Use of CBP in conjunction with paper-based procedures . 24
6.2.5 Use of CBP outside the main control room . 25
6.3 Forms of CBP assistance to operator activities . 25
6.3.1 General . 25
6.3.2 Assistance to primary activities of the operator . 25
6.3.3 Assistance to secondary activities of the operator . 25
6.4 Assistance with operator coordination . 26
6.5 Output documentation . 26
7 CBP system and functional requirements . 27
7.1 General . 27
7.2 Safety requirements . 27
7.3 HMI considerations . 28
7.4 Integration of the CBP system into the DPDS . 28
7.5 CBP system implemented externally to the DPDS . 28

7.5.1 General . 28
7.5.2 Sizing and dependability requirements . 29
7.5.3 Connections between the CBP system and the DPDS . 29
7.5.4 Coherent maintenance of both systems . 29
7.6 CBP system failure . 29
7.7 Output documentation . 30
8 Detailed design requirements . 31
8.1 General . 31
8.2 Basic CBP features . 31
8.2.1 General . 31
8.2.2 Basic features necessary for CBP . 31
8.2.3 Presentation rules . 31
8.2.4 CBP display format layout . 32
8.2.5 Requirements for presentation of individual display elements . 32
8.3 Information presented by the CBP . 33
8.3.1 General . 33
8.3.2 Information for Family 1 CBP . 33
8.3.3 Information for Family 2 CBP . 33
8.3.4 Information for Family 3 CBP . 34
8.4 Navigation. 34
8.4.1 General . 34
8.4.2 Navigation for Family 1 CBP . 34
8.4.3 Navigation for Family 2 and Family 3 CBP . 34
8.5 CBP guidance . 35
8.5.1 General . 35
8.5.2 CBP selection, accessibility and execution .
...