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IEC 61226-ed.4.0
Nuclear power plants - Instrumentation, control and electrical power systems important to safety - Categorization of functions and classification of systems
Translate name
STANDARD published on 29.4.2020
The information about the standard:
Designation standards: IEC 61226-ed.4.0
Publication date standards: 29.4.2020
SKU: NS-992372
The number of pages: 80
Approximate weight : 240 g (0.53 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 61226-ed.4.0 :
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. lIEC 61226:2020 etablit, pour les centrales nucleaires de puissance , une methode daffectation en categories des fonctions specifiees pour la centrale, sur la base de leur importance pour la surete. Le classement, sur la base de la categorie attribuee, des systemes dI&C et dalimentation electrique assurant ou contribuant a la realisation de ces fonctions determine alors les criteres de conception appropries. Les criteres de conception, des lors quils sont appliques, garantissent que chaque fonction est realisee selon son importance pour la surete. Les criteres retenus dans le present document concernent la fonctionnalite, la fiabilite, les performances, la qualification aux conditions environnementales (par exemple, la qualification sismique) et lassurance qualite (AQ). Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: - lalignement sur les exigences, les recommandations et la terminologie de lAIEA, surtout la prise en compte du document SSR 2/1 (ayant remplace le NS-R-1) et du guide SSG 30; - lextension du domaine dapplication aux systemes dalimentation electrique; - le deplacement des exigences detaillees applicables aux fonctions et aux systemes dI&C dans une annexe normative, qui sera supprimee a lissue de la mise a jour de lIEC 61513.
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