Standard Details
Revision of IEEE Std 344-1987 Recommended practices are provided for establishing procedures that will yield data to demonstrate that the Class 1E equipment can meet its performance requirements during and/or following one safe shutdown earthquake event preceded by a number of operating basis earthquake events. This recommended practice may be used to establish tests, analyses, or experienced based evaluations that will yield data to demonstrate Class 1E equipment performance claims or to evaluate and verify performance of devices and assemblies as part of an overall qualification effort. Common methods currently in use for seismic qualification by test are presented. Two approaches to seismic analysis are described, one based on dynamic analysis and the other on static coefficient analysis. Two approaches to experienced-based seismic evaluation are described, one based on earthquake experience and the other based on test experience.
Sponsor Committee | |
Status |
Superseded
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Superseded by | |
Board Approval |
2004-12-08
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History |
Published Date:2005-06-08
Reaffirmed:2009-09-11
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Additional Resources Details
Interpretation | |
PAR | |
Historical Base Standard |
Working Group Details
Working Group |
WG_2.5 - Working Group on Seismic Qualification
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Working Group Chair |
James Parello
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Sponsor Committee | |
Society | |
IEEE Program Manager | |
Active Projects |
This International Standard describes methods for establishing seismic qualification procedures that will yield quantitative data to demonstrate that the equipment can meet its performance requirements. The seismic qualification requirements in this standard, when met, demonstrate and document the ability of equipment to perform safety function(s) during and/or after the specified seismic demand. This standard 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 standard.
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Existing Standards |
Practices are provided for establishing procedures that will yield data to demonstrate that the equipment can meet its performance requirements during and/or following one safe shutdown earthquake event preceded by a number of operating basis earthquake events. This standard may be used to establish tests, analyses, or experienced-based evaluations that will yield data to demonstrate equipment performance claims or to evaluate and verify performance of devices and assemblies as part of an overall qualification effort. Common methods currently in use for seismic qualification by test are presented. Two approaches to seismic analysis are described, one based on dynamic analysis and the other on static coefficient analysis. Two approaches to experienced-based seismic evaluation are described, one based on earthquake experience and the other based on test experience.
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This guide provides direction for establishing procedures that will yield data which verify that the Class I electric equipment can meet its performance requirements during and following a design basis earthquake. This guide may be used by equipment manufactures to establish procedures that will yield data to substantiate performance claims or by equipment users to evaluate and verify performance of representative devices and assemblies as part of an overall qualification efforts.
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These recommended practices provide direction for establishing procedures that will yield data which verify that the class 1E equipment can meet its performance requirements during and following on SSE (safe shutdown earthquake) preceded by a number of OBEs (operating basis earthquakes). This document maybe used by equipment manufactures to establish procedures that will yield data to substantiate performance claims or by equipment users to evaluate and verify performance of representative devices and assemblies as part of an overall qualification effort.
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