BS EN 62340:2010 - Nuclear power plants. Instrumentation and control systems important to safety. Requirements for coping with common cause failure (CCF) – BSI British Standards

BS EN 62340:2010

Nuclear power plants. Instrumentation and control systems important to safety. Requirements for coping with common cause failure (CCF)

Status : Current   Published : March 2008

Format
PDF

Format
HARDCOPY



BS EN 62340:2010 Nuclear power plants. Instrumentation and control systems important to safety. Requirements for coping with common cause failure (CCF)

I&C systems important to safety may be designed using conventional hard-wired equipment, computer-based equipment or by using a combination of both types of equipment. BS EN 62340 is an International Standard which provides requirements and recommendations1 for the overall architecture of I&C systems, which may contain either or both technologies.

The scope of this standard is:

a) To give requirements related to the avoidance of CCF of I&C systems that perform category A functions;

b) To additionally require the implementation of independent I&C systems to overcome CCF, while the likelihood of CCF is reduced by strictly applying the overall safety principles of
IEC SC 45A (notably IEC 61226, IEC 61513, IEC 60880 and IEC 60709);

c) to give an overview of the complete scope of requirements relevant to CCF, but not to overlap with fields already addressed in other standards. These are referenced.

This standard emphasises the need for the complete and precise specification of the safety functions, based on the analysis of design basis accidents and consideration of the main plant safety goals. This specification is the pre-requisite for generating a comprehensive set of detailed requirements for the design of I&C systems to overcome CCF.

Contents of BS EN 62340:

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Conditions and strategy to cope with CCF
5.1 General
5.2 Characteristics of CCF
5.3 Principal mechanisms for CCF of digital I&C systems
5.4 Conditions to defend against CCF of individual I&C systems
5.5 Design strategy to overcome CCF
6 Requirements to overcome faults in the requirements specification
6.1 Deriving the requirements specification for the I&C from the plant safety design base
6.2 Application of the defence-in-depth principle and functional diversity
6.3 CCF related issues at existing plants
7 Design measures to prevent coincidental failure of I&C systems
7.1 The principle of independence
7.2 Design of independent I&C systems
7.3 Application of functional diversity
7.4 Avoidance of failure propagation via communications paths
7.5 Design measures against system failure due to maintenance activities
7.6 Integrity of I&C system hardware
7.7 Precaution against dependencies from external dates or messages
7.8 Assurance of physical separation and environmental robustness
8 Tolerance against postulated latent software faults
9 Requirements to avoid system failure due to maintenance during operation
Annex A (informative) Relation between IEC 60880 and this standard
Annex ZA (normative) Normative references to international publications with their corresponding European publications

 




Standard NumberBS EN 62340:2010
TitleNuclear power plants. Instrumentation and control systems important to safety. Requirements for coping with common cause failure (CCF)
StatusCurrent
Publication Date31 March 2008
Normative References(Required to achieve compliance to this standard)IEC 60671, IEC 60709, IEC 60780, IEC 60880, IEC 60980, IEC 61000-4, IEC 61226, IEC 61513, IAEA NS-G-1.3, IAEA SG-D11, IAEA Safety Glossary:2006, EN 60709, EN 60880, EN 61000-4
Informative References(Provided for Information)IEC 60880, IEC 60880-2:2000
International RelationshipsEN 62340:2010,IEC 62340:2007
Amended ByCorrigendum, July 2010.
Draft Superseded By05/30064104 DC
DescriptorsNuclear-electric power stations, Nuclear reactors, Nuclear power, Equipment safety, Instruments, Control systems, Control equipment, Control technology, Computer applications, Computer software, Nuclear safety, Electrical equipment, Data processing, Errors
ICS27.120.20
Title in FrenchCentrales nucléaires de puissance. Systèmes d'instrumentation et de contrôle-commande importants pour la sûreté. Exigences permettant de faire face aux défaillance de cause commune (DCC)
Title in GermanKernkraftwerke. Leittechnische Systeme mit sicherheitstechnischer Bedeutung Anforderungen zur Beherrschung von Versagen aufgrund gemeinsamer Ursache (CCF)
CommitteeNCE/8
ISBN978 0 580 68114 1
PublisherBSI
FormatA4
DeliveryYes
Pages26
File Size781.6 KB
Price£182.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Collaborate, Innovate, Accelerate.


Worldwide Standards
We can source any standard from anywhere in the world


BSOL

The faster, easier way to work with standards