CE-PA: A user`s manual for determination of controlling earthquakes and development of seismic hazard information data base for the central and eastern United States

Abstract

Portions of thisCE-PA also provides a seismic hazard information data base, including uniform hazard spectra, seismic hazard results for selected magnitude and distance bands, and magnitude-distance distribution functions.. -.The package is comprised of a series of programs that are used sequentially. After performing a probabiktic seismic hazard analysis with the 1993 LLNL methodology, total hazard results and de-aggregated hazard results for a matrix of magnitude-distance pairs are obtained. Then, using total hazard results, CE-PA extracts ground motion levels associated w i t h a user-input reference probability of exceedance for spectral accelerations at lHz, 2.5Hz, SHz, and 1OHz. At these four ground motion levels CE-PA calculates the contribution to the total seismic hazard of earthquakes in a selected set of magnitude and distance bins. Next the package calculates the mean magnitude and distance of the controlling earthquakes for the average of 1 to 2.5 Hz and 5 to 10 Hz.The program can assess controlling earthquakes for a set of pre-compiled seismic hazard data at existing nuclear power plant sites or new sites.

Investigation of techniques for the development of seismic design basis using the probabilistic seismic hazard analysis

“…For this purpose, the software package CE-PA (Short 1995) developed during this project was used. Table 2.14 the values for the controlling earthquakes for soil sites are given based on local site conditions using the sim.plified site correction approach used in the LLNL studies (1989,1993).…”

“…A software package (Short 1995) implementing the procedure described in this section has been developed for estimating the controlling earthquakes in the central and eastern U.S.…”