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A Summary of the Seismic Qualification Utilities Group (SQUG) Program

by Peter I. Yanev, EQE Inc, San Francisco, CA, USA,
Sam W. Swan, EQE Inc, San Francisco, CA, USA,
Neil P. Smith, EQE Inc, San Francisco, CA, USA,



Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities

Abstract:

In 1980, the Nuclear Regulatory Commission (NRC) designated Unresolved Safety Issue (USI) A-46 to address the seismic safety of equipment in operating nuclear power plants. In 1982, the Seismic Qualification Utilities Group (SQUG) was formed with the purpose of trying a new, innovative approach by using experience data in lieu of rigorous seismic qualification for nuclear power plant equipment. Numerous power and industrial sites in California were visited that had experienced peak ground accelerations in the range of 0. 35g to 0. 60g. It was shown that rigorous seismic qualification of the classes of equipment studied will not be necessary in view of the successful performance of these classes in past destructive earthquakes.

Subject Headings: Seismic tests | Seismic effects | Power plants | Equipment and machinery | Nuclear power | Electrical equipment | Utilities | California | United States

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