PD R009-004:2001
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
Railway specifications. Systematic allocation of safety integrity requirements
Hardcopy , PDF
29-06-2007
English
15-09-2001
Important note : Users cannot be edited or removed once added to your Multi user PDF.
Introduction
1 Scope
2 References
2.1 Supporting standards
2.2 Informative references
3 Definitions
4 Symbols and abbreviations
5 Safety integrity levels allocation framework
5.1 Prerequisites
5.2 Overview of the methodology
5.3 Definition of safety of integrity levels
5.4 Qualitative vs. quantitative methods
6 System definition
7 Hazard identification
7.1 General principles
7.2 Empirical hazard identification methods
7.3 Creative hazard identification methods
7.4 Hazard ranking
7.5 Existing hazard lists
8 Risk analysis
8.1 Risk tolerability
8.2 Determination of tolerable hazard rate
9 System design analysis
9.1 Appointment of safety integrity requirements
to functions
9.2 Use of SIL tables
9.3 Identification and treatment of new hazards
arising from design
9.4 Determination of function and subsystem SIL
9.5 Determination of safety integrity requirements
for system elements
Annex A Single-line signalling system example
Annex B Level crossing example
Annex C Comparison of demand and continuous mode
Annex D Proposed changes for annex A of ENV 50129
Annex E Frequently asked questions
Gives a method to determine the required safety integrity level of railway signalling equipment.
| Committee |
GEL/9
|
| DocumentType |
Standard
|
| Pages |
114
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| R009-004 : 2001 | Identical |
| ISO/IEC 15026:1998 | Information technology System and software integrity levels |
| R009-001 : 1997 | RAILWAY APPLICATIONS COMMUNICATION, SIGNALLING AND PROCESSING SYSTEMS HAZARDOUS FAILURE RATES AND SAFETY INTEGRITY LEVELS (SIL) |
| EN 50128:2011/AC:2014 | RAILWAY APPLICATIONS - COMMUNICATION, SIGNALLING AND PROCESSING SYSTEMS - SOFTWARE FOR RAILWAY CONTROL AND PROTECTION SYSTEMS |
| ISA 84.01 : 1996 | APPLICATION OF SAFETY INSTRUMENTED SYSTEMS FOR THE PROCESS INDUSTRIES |
| ENV 50129 : DRAFT 98 | RAILWAY APPLICATIONS - SAFETY RELATED ELECTRONIC SYSTEMS FOR SIGNALLING |
| DEFSTAN 00-56/1(1991) : 1991 | HAZARD ANALYSIS AND SAFETY CLASSIFICATION OF THE COMPUTER AND PROGRAMMABLE ELECTRONIC SYSTEM ELEMENTS OF DEFENCE EQUIPMENT |
| IEC 61508-1:2010 | Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General requirements (see Functional Safety and IEC 61508) |
| EN 50126 : 1999 | RAILWAY APPLICATIONS - THE SPECIFICATION AND DEMONSTRATION OF RELIABILITY, AVAILABILITY, MAINTAINABILITY AND SAFETY (RAMS) |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.