The Re-evaluation of the Potential Seismic Hazard in Relation to Nuclear Power Plants of Korea

다국어 초록 (Multilingual Abstract)

The seismic hazard of the southeastern part of the Korean peninsula is re-evaluated in relation to safety of nuclear power plants.
We take into account two main factors such as seismic hazard with active faults and tsunami occurrences. Major seismic hazardre-evaluation is performed by mechanism of earthquakes and relocation of active faults including tsunami phenomena. The basicrelationship between an earthquake strong motion in terms of gravity (g) and magnitude is clearly demonstrated for an earthquakeresistant design in nuclear power plants. At present we are operating 23 nuclear power plants and we will increase more nuclearpower plants in the next decade. Nevertheless the nuclear power plants in the southeastern part of Korea are not free from seismichazard in the light of recent seismicity - Pohang Earthquake on April 15, 1981 (M=5.3), Yeongwol Earthquake on December 13,1996 (M=4.8), Gyeongju Earthquake on June 26, 1997 (M=4.7), Uljin Earthquake on May 29, 2004 (M=5.2) and Mt. Odae Earthquakeon January 20, 2006 (M=4.8), including many large historical earthquakes in the Gyeongju area which gave severe damageto houses and loss of people in the Shilla Dynasty. The compelling reason of this study is to suggest the seismic hazard re-evaluationin relation to the over-saturated spent fuels as well as nuclear power plants in order to reduce the seismic disaster from theforthcoming earthquakes.

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