New Seismic Requirements for Class I Electrical Equipment

The contents and structure of IEEE 344-1973: "Guide for Seismic Qualification of Class I Electric Equipment for Nuclear Power Generating Stations" are reviewed. Important new requirements and concepts introduced during the recent revision of this Guide are discussed in the context of evolving qualification methods. It is suggested that this paper be studied in combination with IEEE 344-1973. This will contribute towards the standardization of acceptable methods of qualification.