Nuclear power plants - Instrumentation and control important to safety - Data communication in systems performing category A functions

IEC 61500:2009 establishes requirements for data communication which is used in systems performing category A functions in nuclear power plants. It covers also interface requirements for data communication of equipment performing category A functions with other systems including those performing category B and C functions and functions not important to safety. This second edition is intended to accomplish the following: - to change the focus from multiplexed data transmission to data communication; - to restrict the scope to communication in systems performing category A functions.

Kernkraftwerke - Leittechnik mit sicherheitstechnischer Bedeutung - Datenkommunikation in Systemen, die Kategorie-A-Funktionen ausführen

Centrales nucléaires de puissance - Instrumentation et contrôle-commande importants pour la sûreté - Communication de données dans les systèmes réalisant des fonctions de catégorie A

La CEI 61500:2009 établit des exigences applicables à la communication de données assurée pour des systèmes réalisant des fonctions de catégorie A dans les centrales nucléaires de puissance. Cela comprend aussi les exigences relatives aux interfaces des équipements de communication de données assurant des fonctions de catégorie A, avec les autres systèmes y compris ceux qui assurent des fonctions de catégories B et C, ainsi que des fonctions non importantes pour la sûreté. L'objectif de cette deuxième édition est de: - modifier le sujet et passer de la transmission multiplexée de données à la communication de données, - de restreindre le domaine à la communication au sein des systèmes réalisant des fonctions de catégories A.

Jedrske elektrarne - Merilna in nadzorna oprema za zagotavljanje varnosti - Podatkovne komunikacije v sistemih, ki izvajajo funkcije A

IEC 61500:2009 vzpostavlja zahteve za podatkovno komunikacijo, ki se uporablja v sistemih, ki izvajajo funkcije kategorije A v jedrskih elektrarnah. Zajema tudi zahteve za vmesnike za podatkovno komunikacijo opreme, ki izvaja funkcije kategorije A, z drugimi sistemi, vključno s tistimi, ki izvajajo funkcije kategorije B in C, ki niso pomembne za zagotavljanje varnosti. S to drugo izdajo želimo doseči naslednje:
- spremeniti osredotočenost s prenosa multipleksiranih podatkov na podatkovno komunikacijo;
- omejiti obseg uporabe na komunikacijo v sistemih, ki izvajajo funkcije kategorije A.

General Information

Status
Withdrawn
Publication Date
11-Aug-2011
Drafting Committee
Parallel Committee
Current Stage
6060 - Document made available
Due Date
12-Aug-2011
Completion Date
12-Aug-2011

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SLOVENSKI STANDARD
SIST EN 61500:2011
01-oktober-2011
Jedrske elektrarne - Merilna in nadzorna oprema za zagotavljanje varnosti -
Podatkovne komunikacije v sistemih, ki izvajajo funkcije A

Nuclear power plants - Instrumentation and control systems important to safety - Data

communication in systems performing A functions
Kernkraftwerke - Leittechnik mit sicherheitstechnischer Bedeutung -
Datenkommunikation in Systemen, die Kategorie-A-Funktionen ausführen

Centrales nucléaires de puissance - Instrumentation et systèmes contrôle-commande

importants pour la sûreté - Communication de données dans les systèmes réalisant des

fonctions de catégorie A
Ta slovenski standard je istoveten z: EN 61500:2011
ICS:
27.120.20 Jedrske elektrarne. Varnost Nuclear power plants. Safety
SIST EN 61500:2011 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61500:2011
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SIST EN 61500:2011
EUROPEAN STANDARD
EN 61500
NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM
ICS 27.120.20
English version
Nuclear power plants -
Instrumentation and control important to safety -
Data communication in systems performing category A functions
(IEC 61500:2009)
Centrales nucléaires de puissance - Kernkraftwerke -
Instrumentation et contrôle-commande Leittechnik mit sicherheitstechnischer
importants pour la sûreté - Bedeutung -
Communication de données dans les Datenkommunikation in Systemen, die
systèmes réalisant des fonctions de Kategorie-A-Funktionen ausführen
catégorie A (IEC 61500:2009)
(CEI 61500:2009)

This European Standard was approved by CENELEC on 2011-08-08. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61500:2011 E
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SIST EN 61500:2011
EN 61500:2011 - 2 -
Foreword

The text of the International Standard IEC 61500:2009, prepared by SC 45A, Instrumentation and control

of nuclear facilities, of IEC TC 45, Nuclear instrumentation, was submitted to the formal vote and was

approved by CENELEC as EN 61500 on 2011-08-08 without any modification.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent

rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2012-08-08
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2014-08-08
with the EN have to be withdrawn

As stated in the nuclear safety directive 2009/71/EURATOM, Chapter 1, Article 2, item 2, Member States

are not prevented from taking more stringent safety measures in the subject-matter covered by the

Directive, in compliance with Community law.

In a similar manner, this European standard does not prevent Member States from taking more stringent

nuclear safety measures in the subject-matter covered by this standard.
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 61500:2009 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60068 series NOTE Harmonized in EN 60068 series (not modified).
IEC 60721 series NOTE Harmonized in EN 60721 series (not modified).
IEC 60964 NOTE Harmonized as EN 60964.
IEC 60965 NOTE Harmonized as EN 60965.
IEC 61158-3-19 NOTE Harmonized as EN 61158-3-19.
IEC 61508-1 NOTE Harmonized as EN 61508-1.
IEC 61508-2 NOTE Harmonized as EN 61508-2.
IEC 61508-3 NOTE Harmonized as EN 61508-3.
IEC 61508-4 NOTE Harmonized as EN 61508-4.
IEC 61784-3 NOTE Harmonized as EN 61784-3.
IEC 62138 NOTE Harmonized as EN 62138.
__________
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SIST EN 61500:2011
- 3 - EN 61500:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60709 - Nuclear power plants - Instrumentation and EN 60709 -
control systems important to safety -
Separation
IEC 60780 1998 Nuclear power plants - Electrical equipment - -
of the safety system - Qualification
IEC 60880 2006 Nuclear power plants - Instrumentation and EN 60880 2009
control systems important to safety - Software
aspects for computer-based systems
performing category A functions
IEC 60980 - Recommended practices for seismic - -
qualification of electrical equipment of the
safety system for nuclear generating stations
IEC 60987 (mod) 2007 Nuclear power plants - Instrumentation and EN 60987 2009
control important to safety - Hardware design
requirements for computer-based systems
IEC 61000 Series Electromagnetic compatibility (EMC) EN 61000 Series
IEC 61226 - Nuclear power plants - Instrumentation and EN 61226 -
control important to safety - Classification of
instrumentation and control functions
IEC 61513 - Nuclear power plants - Instrumentation and - -
control for systems important to safety -
General requirements for systems
IEC 62340 2007 Nuclear power plants - Instrumentation and EN 62340 2010
control systems important to safety -
Requirements for coping with common cause
failure (CCF)
IAEA Safety guide 2002 Instrumentation and control systems important - -
NS-G-1.3 to safety in nuclear power plants
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SIST EN 61500:2011
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SIST EN 61500:2011
IEC 61500
Edition 2.0 2009-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety – Data
communication in systems performing category A functions
Centrales nucléaires de puissance – Instrumentation et contrôle-commande
importants pour la sûreté – Communication de données dans les systèmes
réalisant des fonctions de catégorie A
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 27.120.20 ISBN 978-2-88910-523-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 61500:2011
– 2 – 61500 © IEC:2009
CONTENTS

FOREWORD...........................................................................................................................3

INTRODUCTION.....................................................................................................................5

1 Scope...............................................................................................................................7

2 Normative references .......................................................................................................7

3 Terms and definitions .......................................................................................................8

4 Symbols and abbreviations...............................................................................................9

5 General requirements .......................................................................................................9

5.1 Principles of selection of data communication techniques and equipment................9

5.2 Functional requirements ..........................................................................................9

5.3 Performance requirements ....................................................................................10

5.4 Failure detection ...................................................................................................10

5.5 Communication within division...............................................................................10

5.6 Interfaces to systems of lower importance to safety...............................................10

6 Physical separation and isolation....................................................................................11

6.1 Electrical isolation .................................................................................................11

6.2 Physical separation ...............................................................................................11

7 Functional independence................................................................................................11

8 Reliability .......................................................................................................................12

8.1 Self-supervision and failure mitigation ...................................................................12

8.1.1 Communication error detection ..................................................................12

8.1.2 Response to failure ...................................................................................12

8.2 Test.......................................................................................................................12

8.3 Prevention of failures (including CCF) ...................................................................13

9 Qualification ...................................................................................................................13

10 Maintenance and modification ........................................................................................14

Bibliography..........................................................................................................................15

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SIST EN 61500:2011
61500 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR POWER PLANTS –
INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY –
DATA COMMUNICATION IN SYSTEMS PERFORMING
CATEGORY A FUNCTIONS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61500 has been prepared by subcommittee 45A: Instrumentation

and control of nuclear facilities, of IEC technical committee 45: Nuclear instrumentation.

This second edition cancels and replaces the first edition published in 1996. This edition

constitutes a technical revision.
The revision of the standard is intended to accomplish the following:
• To change the focus from multiplexed data transmission to data communication

• To restrict the scope to communication in systems performing category A functions

• To clarify definitions
• To up-date the reference to new standards published since the first issue.
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SIST EN 61500:2011
– 4 – 61500 © IEC:2009
The text of this standard is based on the following documents:
FDIS Report on voting
45A/772/FDIS 45A/783/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in

the data related to the specific publication. At this date, the publication will be

• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 10 ----------------------
SIST EN 61500:2011
61500 © IEC:2009 – 5 –
INTRODUCTION
a) Technical background, main issues and organization of the standard

The equipment for data communication of on-line plant data can simplify the hardwired cables

connecting distributed systems for instrumentation, control, protection and monitoring needed

for safe Nuclear Power Plants operation. Such communication systems can have advantages

over direct cables, for electrical isolation, for reduction of cable fire loads or other reasons. In

a distributed computer based system, communication equipment is an essential part of the

system. Data communication is usually essential for implementing I&C systems important to

safety in nuclear power plants.

It is intended that the standard be used by operators of NPPs (utilities), manufacturers of data

communication equipment, systems evaluators and by licensors.

b) Situation of the current standard in the structure of the IEC SC 45A standard series

IEC 61500 is the third level IEC SC 45A document tackling the generic issue of data

communication for equipment performing category A functions.

IEC 61500 is to be read in association with IEC 61513, which is the appropriate IEC SC 45A

document providing guidance on general requirements for instrumentation and control

systems important to safety, IEC 60880, which is the appropriate IEC SC 45A document

providing guidance on software aspects for computer based systems performing category A

functions, and IEC 60987 which is the appropriate IEC SC 45A document providing guidance

on hardware aspects for computer based systems .

For more details on the structure of the IEC SC 45A standard series, see item d) of this

introduction.
c) Recommendations and limitations regarding the application of the standard

It is important to note that this standard establishes no additional functional requirements for

safety systems.

Aspects for which special recommendations have been provided in this standard are:

• Requirements for data communication within systems performing category A functions.

• Requirements for data communication between divisions of a system performing category

A functions.

• Requirements for data communication of systems performing category A functions with

systems of lower safety importance.
• Reliability requirements for data communication.

To ensure that the standard will continue to be relevant in future years, emphasis is placed on

principles, rather than on specific technologies.

d) Description of the structure of the IEC SC 45A standard series and relationships

with other IEC documents and other bodies’ documents (IAEA, ISO)

The top-level document of the IEC SC 45A standard series is IEC 61513. It provides general

requirements for I&C systems and equipment that are used to perform functions important to

safety in NPPs. IEC 61513 structures the IEC SC 45A standard series.

IEC 61513 refers directly to other IEC SC 45A standards for general topics related to

categorization of functions and classification of systems, qualification, separation of systems,

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SIST EN 61500:2011
– 6 – 61500 © IEC:2009

defense against common cause failure, software aspects of computer-based systems,

hardware aspects of computer-based systems, and control room design. The standards

referenced directly at this second level should be considered together with IEC 61513 as a

consistent document set.

At a third level, IEC SC 45A standards not directly referenced by IEC 61513 are standards

related to specific equipment, technical methods, or specific activities. Usually these

documents, which make reference to second-level documents for general topics, can be used

on their own.

A fourth level extending the IEC SC 45A standard series, corresponds to the technical reports

which are not normative.

IEC 61513 has adopted a presentation format similar to the basic safety publication

IEC 61508 with an overall safety life-cycle framework and a system life-cycle framework and

provides an interpretation of the general requirements of IEC 61508-1, IEC 61508-2 and

IEC 61508-4, for the nuclear application sector. Compliance with IEC 61513 will facilitate

consistency with the requirements of IEC 61508 as they have been interpreted for the nuclear

industry. In this framework, IEC 60880 and IEC 62138 correspond to IEC 61508-3 for the

nuclear application sector.

IEC 61513 refers to ISO as well as to IAEA GS-R-3 for topics related to quality assurance

(QA).

The IEC SC 45A standards series consistently implements and details the principles and

basic safety aspects provided in the IAEA code on the safety of NPPs and in the IAEA safety

series, in particular the Requirements NS-R-1, establishing safety requirements related to the

design of nuclear power plants, and the Safety Guide NS-G-1.3 dealing with instrumentation

and control systems important to safety in nuclear power plants. The terminology and

definitions used by SC 45A standards are consistent with those used by the IAEA.
---------------------- Page: 12 ----------------------
SIST EN 61500:2011
61500 © IEC:2009 – 7 –
NUCLEAR POWER PLANTS –
INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY –
DATA COMMUNICATION IN SYSTEMS PERFORMING
CATEGORY A FUNCTIONS
1 Scope

This International Standard establishes requirements for data communication which is used in

systems performing catego
...

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