Seismic Qualification of Equipment in Operating Nuclear Power Plants. Unresolved Safety Issue A-46

摘要

The report summarizes the work accomplished on Unresolved Safety Issue A-46 by the Nuclear Regulatory Commission staff and its contractors. In addition, the collection and review of seismic experience data and existing seismic test data by the SQUG and EPRI respectively, and the review and recommendations of the SSRAP are presented. The principal technical finding of USI A-46 is that seismic experience data, supplemented by existing seismic test data, applied in accordance with the guidelines developed, provides the most reasonable alternative to current qualification criteria to verify the seismic adequacy of equipment in operating nuclear plants.