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IEC 60744-ed.2.0
Nuclear power plants - Instrumentation and control systems important to safety - Safety logic assemblies used in systems performing category A functions: Characteristics and test methods
Translate name
STANDARD published on 14.5.2018
The information about the standard:
Designation standards: IEC 60744-ed.2.0
Publication date standards: 14.5.2018
SKU: NS-848996
The number of pages: 70
Approximate weight : 210 g (0.46 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60744-ed.2.0 :
IEC 60744:2018 provides requirements and recommendations for the design, construction and test of safety logic assemblies used in safety systems to perform category A safety functions (in accordance with IEC 61226). Safety logic assemblies include logic such as the hardwired logic assembly interfacing computer-based systems to switchgear, actuators or contactors to provide trip or engineered safety feature actuations. Safety logic assemblies are significant parts of a safety system and may include voting logic between redundant channels. This document provides a general description of safety logic assemblies for safety actuators control. The principles to meet dependability objectives are presented. The main features relating to the design requirements are described and explained. This new edition includes the following significant technical changes with respect to the previous edition: a) update of the references to standards published or revised since the issue of the first edition of the current standard, including IEC 61513 and IEC 61226; b) additional requirements for operational and maintenance bypass use; requirements of voting logic; and others. LIEC 60744:2018 specifie les exigences et les recommandations pour la conception, la fabrication et les essais des ensembles logiques de surete utilises dans les systemes de surete pour realiser des fonctions de surete de categorie A (conformement a l’IEC 61226). Les ensembles logiques de surete realisent des fonctions logiques comme, par exemple, la logique cablee faisant l’interface entre la partie programmee et les interrupteurs d’arret du reacteur, les actionneurs ou les contacteurs pour declencher l’arret du reacteur ou les actions de sauvegarde. Les ensembles logiques de surete sont des elements importants dun systeme de surete et peuvent comporter une logique de vote entre des voies redondantes. Le present document decrit de maniere generale les ensembles logiques de surete pour la commande des actionneurs de surete. Il donne les principes permettant datteindre les objectifs de surete de fonctionnement. Il decrit et explicite egalement les principales caracteristiques relatives aux exigences de conception. Cette nouvelle edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) actualisation des references aux normes publiees ou revisees depuis la publication de la premiere edition de la norme actuelle, y compris l’IEC 61513 et l’IEC 61226; b) exigences supplementaires concernant l’utilisation du bipasse de fonctionnement et du bipasse de maintenance; exigences concernant la logique de vote etc.
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