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Title: Guidelines for ground motion definition for the eastern United States

Guidelines for the determination of earthquake ground motion definition for the eastern United States are established here. Both far-field and near-field guidelines are given. The guidelines were based on an extensive review of the current procedures for specifying ground motion in the United States. Both empirical and theoretical procedures were used in establishing the guidelines because of the low seismicity in the eastern United States. Only a few large- to great-sized earthquakes (M/sub s/ > 7.5) have occurred in this region, no evidence of tectonic surface ruptures related to historic or Holocene earthquakes has been found, and no currently active plate boundaries of any kind are known in this region. Very little instrumented data have been gathered in the East. Theoretical procedures are proposed so that in regions of almost no data, a reasonable level of seismic ground motion activity can be assumed. The guidelines are to be used to develop the safe shutdown earthquake (SSE). A new procedure for establishing the operating basis earthquake (OBE) is proposed, in particular for the eastern United States. The OBE would be developed using a probabilistic assessment of the geological conditions and the recurrence of seismic events at a site. These guidelines shouldmore » be useful in development of seismic design requirements for future reactors. 17 refs., figs., tabs.« less
Authors:
; ;
Publication Date:
OSTI Identifier:
5580033
Report Number(s):
ORNL-6138
ON: DE85015079
DOE Contract Number:
AC05-84OR21400
Resource Type:
Technical Report
Research Org:
Oak Ridge National Lab., TN (USA)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 58 GEOSCIENCES; EARTHQUAKES; RISK ASSESSMENT; EAST COAST; SEISMICITY; GROUND MOTION; SPECIFICATIONS; NUCLEAR POWER PLANTS; REACTOR SAFETY; RECOMMENDATIONS; SITE SELECTION; MOTION; NORTH AMERICA; NUCLEAR FACILITIES; POWER PLANTS; SAFETY; SEISMIC EVENTS; THERMAL POWER PLANTS; USA 220900* -- Nuclear Reactor Technology-- Reactor Safety; 580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989); 220501 -- Nuclear Reactor Technology-- Environmental Aspects-- Siting