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Abstract INTRODUCTION .. In Egypt the electric energy demand in the last two decades is increasing at an average rate of 12.8% and it is expected that th1s trend will continue but with slightly lower rate to meet growing needs of electric energy required for industry, agriculture and social development. Arab Republic of Egypt plans to construct a nuclear power plant (N.P.P.) based on pressured water reactor IPWR) using enriched Uranium as a fuel • EL.-Dabaa,has been chosen -~s a suitable site since 1982 for building a first N.P.P in Egypt. Earthquake activity and seismic hazard studies are important components of the seismic aspects of nuclear power plant siting. ror this reason a study of the effect of earthquakes at EL-Dabaa will be carried out. An Earthquake has been a greatest fury of nature and has caused an immense damage of life and property from time to time in various areas of the world. In Egypt the history of strong destructive earthquakes goes back to 2800 B.C,when a destructive shock happened at east of the Nile Delta. Its maximu’Tl intensity was 7 MMS (modefied mercall scale), Sieberg (1932B). Ambraseys (1961) reported that Egypt was shaken on April 955 A.D by an earthquake. Poirier and Taher (1980) dated it as lst,January 950 and estimated its intensity at Alexandria as 8 MMS. Ambraseys (1961) reported that Egypt and in particular Cilro was shaken’by seven earthquakes and many persons lo~t their lives ill 15 June 1211, Poirier and Taber (19 80) estimated the main shock intensity to De 8 MMS at Cairo and its date to be 2 may 1 |