IEC 61226:2009
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Nuclear power plants - Instrumentation and control important to safety - Classification of instrumentation and control functions
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
English - French
08-07-2009
31-12-2021
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Classification scheme
5.1 General
5.2 Background
5.3 Description of categories
5.3.1 General
5.3.2 Category A
5.3.3 Category B
5.3.4 Category C
5.4 Assignment criteria
5.4.1 General
5.4.2 Category A
5.4.3 Category B
5.4.4 Category C
6 Classification procedure
6.1 General
6.2 Identification of design basis
6.3 Identification and classification of functions
7 Assignment of technical requirements to categories
7.1 General requirements
7.2 Requirements related to functions
7.2.1 Basic requirements
7.2.2 Specific requirements
7.3 Requirements related to I&C systems
7.3.1 Basic requirements
7.3.2 Specific requirements
7.4 Requirements related to equipment
7.4.1 Basic requirements
7.4.2 Specific requirements
7.5 Requirements related to quality aspects
7.5.1 Basic requirements
7.5.2 Specific requirements
Annex A (informative) Examples of categories
Bibliography
IEC 61226:2009 establishes a method of classification of the information and command functions for nuclear power plants, and the instrumentation and control systems and equipment that provide those functions, into categories that designate the importance to safety of the function. The resulting classification then determines relevant design criteria. Is applicable to all the information and command functions and the instrumentation and control systems and equipment that provide those functions. The main changes with respect to the previous edition are listed below:
- to introduce a definition for "non-hazardous stable state";
- to clarify limits of categories;
- to clarify requirements related to equipment used for beyond design events.
| Committee |
TC 45/SC 45A
|
| DevelopmentNote |
Stability Date: 2017. (09/2017)
|
| DocumentType |
Standard
|
| Pages |
64
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| NF EN 61226 : 2010 | Identical |
| NEN EN IEC 61226 : 2010 | Identical |
| I.S. EN 61226:2010 | Identical |
| PN EN 61226 : 2010 | Identical |
| VDE 0491-1 : 2010 | Identical |
| DIN EN 61226 : 2010 | Identical |
| BS EN 61226:2010 | Identical |
| BS IEC 61226 : 2009 | Identical |
| CEI EN 61226 : 2011 | Identical |
| EN 61226:2010 | Identical |
| GOST R IEC 61226 : 2011 | Identical |
| NEN IEC 61226 : 2005 | Identical |
| DIN IEC 61226 : 2005 | Identical |
| UNE-EN 61226:2010 | Identical |
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