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BSI BS EN IEC 61226:2021

Nuclear power plants. Instrumentation, control and electrical power systems important to safety. Categorization of functions and classification of systems
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BSI BS EN IEC 61226:2021

Nuclear power plants. Instrumentation, control and electrical power systems important to safety. Categorization of functions and classification of systems

PUBLISH DATE 2021
PAGES 46
BSI BS EN IEC 61226:2021
IEC 61226:2020 establishes, for nuclear power plants , a method of assignment of the functions specified for the plant into categories according to their importance to safety. Subsequent classification of the I&C and electrical power systems performing or supporting these functions, based on the assigned category, then determines relevant design criteria.
The design criteria, when applied, ensure the achievement of each function in accordance to its importance to safety. In this document, the criteria are those of functionality, reliability, performance, environmental qualification (e.g. seismic) and quality assurance (QA).
This edition includes the following significant technical changes with respect to the previous edition:
- to align on IAEA requirements, recommendations and terminology, particularly to take into account the replacement of NS-R-1 by SSR 2/1 and publication of SSG 30;
- to extend the scope to electrical power systems;
- to move the detailed requirements applying to functions and I&C systems to a normative annex, which will be removed after updating IEC 61513.
SDO BSI: British Standards Institution
Document Number IEC 61226
Publication Date July 29, 2021
Language en - English
Page Count 46
Revision Level
Supercedes
Committee NCE/8
Publish Date Document Id Type View
July 29, 2021 BS EN IEC 61226:2021 Revision
Sept. 30, 2009 BS IEC 61226:2009 Revision
Aug. 31, 2007 BS IEC 61226:2005 Revision
Nov. 30, 2007 BS IEC 61226:2005 Consolidated