CENELEC
Project
| Reference | CLC/TR 50126-2:2007 |
|---|---|
| Title | Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Guide to the application of EN 50126-1 for safety |
| Project Number | 15359 |
| Abstract/Scope | 1.1 This Technical Report provides guidance on specific issues, listed under 1.3 below, for applying the safety process requirements in EN 50126 1 to a railway system and for dealing with the safety activities during the different system life cycle phases. The guidance is applicable to all systems covered within the scope of EN 50126-1. It assumes that the users of the report are familiar with safety matters but need guidance on the application of EN 50126-1 for safety issues that are not or could not be addressed in the standard in detail. 1.2 EN 50126-1 is the top-level basic RAMS standard. This application guide, CLC/TR 50126 2 forms an informative part of EN 50126-1 dealing explicitly with safety aspects as limited by the scope defined in 1.3 below. 1.3 Limitation of scope The scope is limited to providing guidance only for the following issues related to EN 50126 1. i) Production of a top-level generic risk model for the railway system down to its major constituents (e.g., signalling, rolling stock, infrastructure, etc.) with definition of the constituents of the model and their interactions. ii) Development of a checklist of common functional hazards within a conventional railway system (including high speed lines, Light Rail Train’s, metro’s, etc.). iii) Guidance on the application of the risk acceptance principles in EN 50126-1. iv) Guidance on the application of functional safety in railway systems and qualitative assessment of tolerable risk with examples. v) Guidance for specifying relevant functional safety requirements and apportionment of safety targets to the requirements for sub-systems (e.g. for rolling stock: door systems, brake systems, etc.). vi) Guidance on the application of safety integrity level concept, through all the life cycle phases of the system. vii) Guidance on methods for combining probabilistic and deterministic means for safety demonstration. viii) Guidance on the essentials (incl. maintenance, operation, etc.) for documented evidence or proof of safety (safety case) with proposals for a common structure for such documentation. |
| Status |
Published
|
Status
| Current Stage code | 6060 |
|---|---|
| Current Stage code date | 2007-02-22 |
| Current Stage code deadline | |
| Deadline date for vote | 2007-07-31 |
Legal
| Directive(s) | |
|---|---|
| Mandate(s) | |
| Order Voucher |
Details
| IEC Technical Body | IEC/TC 9 |
|---|---|
| Reference Document | |
| ICS | 45.020 - Railway engineering in general |
| Keywords | Railway; Reliability; Availability; Maintainability; RAMS |
| Note | |
| A-Deviation(s) | |
| Special National Condition(s) |
Environment
|
Clause
|
Categories - Aspects
|
Product Life Cycle
|
Information
|
|---|---|---|---|
| All | Risks to the environment from accidents or misuse | Use | B2B, B2C |
History
Implementation Dates
| date of Ratification (DOR) (1) | 2007-01-22 |
|---|---|
| date of Availability (DAV) (2) | 2007-02-22 |
| date of Announcement (DOA) (3) | - |
| date of Publication (DOP) (4) | - |
| date of Withdrawal (DOW) (5) | - |
Relations
| Supersedes | |
|---|---|
| Superseded by | prEN 50126-1:2012 |
| Normative reference (6) | ISO/IEC Guide 51:1999 EN 50126-1:1999 CLC/TR 50126-3:2006 EN 50128:2001 EN 50129:2003 CLC/TR 50506-1:2007 IEC 60050-191:1990 EN 60300-3-1:2004 IEC 60300-3-9:1995 HD 485 S1:1987 HD 617 S1:1992 EN 61078:1993 EN 61160:2005 IEC 61165:1995 EN 61508-1:2001 EN 61703:2002 IEC 61882:2001 |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
