IEC/IEEE 60980-344-ed.1.0

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Označenie: IEC/IEEE 60980-344-ed.1.0

Dátum vydania: 20.10.2020

Stránok: 82

Krajina: Medzinárodná technická norma

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IEC/IEEE 60980-344:2020 describes methods for establishing seismic qualification procedures that will yield quantitative data to demonstrate that the equipment can meet its performance requirements. This document is applicable to electrical, mechanical, instrumentation and control equipment/components that are used in nuclear facilities. This document provides methods and documentation requirements for seismic qualification of equipment to verify the equipment’s ability to perform its specified performance requirements during and/or after specified seismic demands. This document does not specify seismic demand or performance requirements. Other aspects, relating to quality assurance, selection of equipment, and design and modification of systems, are not part of this document. As seismic qualification is only a part of equipment qualification, this document is used in conjunction with IEC/IEEE 60780-323. The seismic qualification demonstrates equipment’s ability to perform its safety function(s) during and/or after the time it is subjected to the forces resulting from at least one safe shutdown earthquake (SSE/S2). This ability is demonstrated by taking into account, prior to the SSE/S2, the ageing of equipment and the postulated occurrences of a given number of lower intensity operating basis earthquake (OBE/S1). Ageing phenomena to be considered, if specified in the design specification, are those which could increase the vulnerability of equipment to vibrations caused by an SSE/S2. IEC/IEEE 60980-344:2020 decrit les methodes detablissement des procedures de qualification sismique permettant dobtenir des donnees quantitatives visant a demontrer que lequipement peut satisfaire a ses exigences de performance. Le present document sapplique aux equipements/composants electriques, mecaniques, dinstrumentation et de controle commande utilises dans les installations nucleaires. Il donne les methodes et exigences de documentation relatives a la qualification sismique des equipements afin de verifier laptitude de ces derniers a satisfaire a leurs exigences de performances specifiees pendant et/ou apres les sollicitations sismiques specifiees. Le present document ne specifie aucune sollicitation sismique ni exigence de performances. Les autres aspects, relatifs a lassurance qualite, au choix des equipements et a la conception et la modification des systemes ne relevent pas du present document. La qualification sismique ne representant quune partie de la qualification des equipements, le present document est utilise conjointement avec lIEC/IEEE 60780-323. La qualification sismique demontre laptitude de lequipement a executer sa ou ses fonctions de surete pendant et/ou apres avoir ete soumis aux efforts dau moins un seisme majore de securite (SSE/S2). Cette aptitude est demontree en tenant compte, avant le seisme de reference en exploitation SSE/S2, du vieillissement de lequipement et des eventuelles occurrences dun certain nombre de seismes de reference en exploitation de moindre intensite (OBE/S1). Les phenomenes de vieillissement a prendre en consideration, sils sont indiques dans la specification de conception, sont ceux qui peuvent augmenter la vulnerabilite des equipements aux vibrations provoquees par un SSE/S2. Cette nouvelle edition annule et remplace la premiere edition de lIEC 60980, parue en 1989, et constitue une revision technique. Elle remplace egalement la norme IEEE 344TM-2013.