南海トラフ巨大地震の津波を起因とした化学物質流出の防止対策と仮想流出時のリスク評価

抄録

In case the Nankai megathrust earthquake occurs, there is a risk that a tsunami has the tanks move or buckle on the premises of chemical factories on the Pacific Ocean side, resulting in the chemical release. This study aims to evaluate the measures to prevent chemical release by the tsunami caused by the Nankai megathrust earthquake and to assess the human health effects caused by this chemical accident. For the former, we used the method of release probability to evaluate two measures: keeping the storage rate of the tank high and raising the storage floor of the tank. For the latter, we assumed seven release cases with different storage rates and different raised heights of floor, and calculated atmospheric concentration after the accident. The results showed that the combined risk of release probability and human health effects is smallest when storage rate is 60% and raised height is 1.5 m.