2020 年 17 巻 1 号 p. 3-14
In March 2013, the Central Disaster Management Council (Cabinet Office) announced "Damage assumption of Nankai Trough Earthquake (Second Report)", and in May "Measures against Nankai Trough Earthquake (Final Report)". However, in the final report, the only information on tsunamis was "List of maximum tsunami heights by prefecture and municipality (Appendix 1-2)". There was no tsunami forecast data for the addresses (specific areas) of thermal power plants. In April 2002, Geospatial Information Authority of Japan (GSI) started operation of the “hazard map portal site”. In June 2018, the new hazard map portal site "Overlapping Hazard Map" was completed. It has a "risk display by address search" function that displays "power station location" data and "maximum tsunami inundation depth" data.
This study consists of four parts. First, analyze the relationship between damage and recovery period of thermal power plants due to earthquake motion and tsunamis in the Great East Japan Earthquake. Second, use the "overlapping hazard map" to predict damage to thermal power plants due to ground motion and tsunamis from Nankai Trough Earthquake. Third, simulate the transition of recovery. Finally, analyze the power supply structure after Great East Japan Earthquake Disaster, which highly adds weight to toward thermal power generation.