CLC/TR 50451:2007

Railway applications - Systematic allocation of safety integrity requirements

The scope of this Technical Report is to define a method to determine the required Safety Integrity Level of railway signalling equipment taking in consideration • the operational conditions of the railway, and • the architecture of the signalling system. From a mechanistic point of view the task of this Technical Report is to define a method of calculation, which determines the integrity requirements (qualitatively and quantitatively) from the inputs stated above.

Bahnanwendungen — Systematische Zuordnung von Sicherheitsintegritätsanforderungen

Applications ferroviaires - Allocation systématique des exigences d'intégrité de la sécurité

Železniške naprave – Sistematična razporeditev zahtev varnostne integritete

General Information

• Status: Withdrawn
• Publication Date: 15-May-2007
• ICS: 45.020 - Railway engineering in general
• ICS: 93.100 - Construction of railways
• Technical Committee: CLC/TC 9X - Electrical and electronic applications for railways
• Drafting Committee: CLC/SC 9XA - Communications, signalling and processing systems
• Parallel Committee: IEC/TC 9 - IEC_TC_9
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 24-Oct-2018
• Ref Project: SIST-TP CLC/TR 50451:2007 - Railway applications - Systematic allocation of safety integrity requirements

Relations

• Replaced By: EN 50129:2018 - Railway applications - Communication, signalling and processing systems - Safety related electronic systems for signalling
• Effective Date: 26-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TP CLC/TR 50451:2007
01-oktober-2007
1DGRPHãþD
SIST R009-004:2002
äHOH]QLãNHQDSUDYH±6LVWHPDWLþQDUD]SRUHGLWHY]DKWHYYDUQRVWQHLQWHJULWHWH
Railway applications - Systematic allocation of safety integrity requirements
Bahnanwendungen — Systematische Zuordnung von
Sicherheitsintegritätsanforderungen
Applications ferroviaires - Allocation systématique des exigences d'intégrité de la
sécurité
Ta slovenski standard je istoveten z: CLC/TR 50451:2007
ICS:
45.020 Železniška tehnika na Railway engineering in
splošno general
SIST-TP CLC/TR 50451:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CLC/TR 50451:2007

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SIST-TP CLC/TR 50451:2007


TECHNICAL REPORT
CLC/TR 50451

RAPPORT TECHNIQUE
May 2007
TECHNISCHER BERICHT

ICS 45.020;93.100 Supersedes R009-004:2001


English version


Railway applications –
Systematic allocation of safety integrity requirements



Applications ferroviaires –  Bahnanwendungen –
Allocation systématique des exigences Systematische Zuordnung von
d'intégrité de la sécurité Sicherheitsintegritätsanforderungen







This Technical Report was approved by CENELEC on 2006-02-18.

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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TR 50451:2007 E

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SIST-TP CLC/TR 50451:2007
CLC/TR 50451:2007 - 2 -
Foreword

This Technical Report was prepared by SC 9XA, Communication, signalling and processing systems, of
Technical Committee CENELEC TC 9X, Electrical and electronic applications for railways.

The text of the draft was circulated for vote in accordance with the Internal Regulations, Part 2,
Subclause 11.4.3.3 and was approved by CENELEC as CLC/TR 50451 on 2006-02-18.

This Technical Report supersedes R009-004:2001.
__________

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SIST-TP CLC/TR 50451:2007
- 3 - CLC/TR 50451:2007
Contents

Executive summary . 4
Introduction . 7
1 Scope. 8
2 References. 9
2.1 Normative references. 9
2.2 Informative references. 9
3 Definitions. 10
4 Symbols and abbreviations . 17
5 Safety Integrity Levels allocation framework . 18
5.1 Prerequisites. 18
5.2 Overview of the methodology . 18
5.3 Definition of Safety Integrity Levels. 22
5.4 Qualitative vs quantitative methods . 23
5.4.1 Qualitative assessment.23
5.4.2 Quantitative assessment.24
5.5 EN 50126-1 lifecycle context .
...