BS IEC 61225:2005
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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Nuclear power plants. Instrumentation and control systems important to safety. Requirements for electrical supplies
Hardcopy , PDF
04-03-2019
English
31-01-2006
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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Withdrawn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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