BS IEC 61225:2005
Withdrawn
View Superseded by
Nuclear power plants. Instrumentation and control systems important to safety. Requirements for electrical supplies
Hardcopy , PDF
English
01-31-2006
03-04-2019
FOREWORD
0 Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 System requirements
4.1 Function and description
4.2 System divisions
4.3 System boundaries
5 Requirements for redundancy, physical separation,
and independence
5.1 General
5.2 Redundancy
5.3 Physical separation
5.4 Independence
5.5 Reliability
6 Functional requirements for I&C power supplies
6.1 Power supplies for I&C systems important to safety
6.2 Batteries and chargers
6.3 Inverters and converters
7 Requirements for distribution system design
7.1 System aspects
7.2 Load allocation
7.3 Electrical aspects
8 Effects of loads on supply quality
8.1 Electromagnetic interference
8.2 Transients
8.3 Load current
8.4 Safety loads and non-safety loads
9 Characteristics of supplies given to individual loads
9.1 DC supplies
9.2 AC supplies
10 Monitoring and protection
10.1 Monitoring
10.2 Protection
11 Qualification of equipment
12 Testing
13 Maintenance
Annex A (informative) Examples of specifications
Specifies the performance and the functional characteristics of the electrical supply systems required for the instrumentation and control (I&C) systems important for safety of a nuclear power plant.
| Committee |
NCE/8
|
| DevelopmentNote |
Supersedes BS 7674(1993) and 04/30115723 DC. (02/2006) Reviewed and confirmed by BSI, March 2015. (03/2015)
|
| DocumentType |
Standard
|
| Pages |
36
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| SupersededBy | |
| Supersedes |
Specifies the performance and the functional characteristics of the electrical supply systems required for the instrumentation and control (I&C) systems important to safety of a nuclear power plant. Gives also guidance on the possible use of these supplies for other I&C systems. Defines the methods of application of the relevant IAEA Safety Guide NS-G-1.3.
| Standards | Relationship |
| IEC 61225:2005 | Identical |
| IEC 60038:2009 | IEC standard voltages |
| IEC 61226:2009 | Nuclear power plants - Instrumentation and control important to safety - Classification of instrumentation and control functions |
| IEC 62138:2004 | Nuclear power plants - Instrumentation and control important for safety - Software aspects for computer-based systems performing category B or C functions |
| IEC 60980:1989 | Recommended practices for seismic qualification of electrical equipment of the safety system for nuclear generating stations |
| IEC 60146-2:1999 | Semiconductor converters - Part 2: Self-commutated semiconductor converters including direct d.c. converters |
| IEC 60880:2006 | Nuclear power plants - Instrumentation and control systems important to safety - Software aspects for computer-based systems performing category A functions |
| IEC 60780:1998 | Nuclear power plants - Electrical equipment of the safety system - Qualification |
| IEC 61513:2011 | Nuclear power plants - Instrumentation and control important to safety - General requirements for systems |
| IEC 60709:2004 | Nuclear power plants - Instrumentation and control systems important to safety - Separation |
| IEC 60686:1980 | Stabilized power supplies, a.c. output |
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