抄録
To consider measures for protecting severe accident, the evaluation of equipment damage caused by tsunami debris in a nuclear power plant is necessary. The purpose of this study is to establish a method to evaluate the condition of the equipment hit by tsunami debris. In the condition evaluation, it is necessary to set the impact force appropriately. In this study, we focused on FEMA’s formula, which is one of the evaluation formulas to estimate impact forces of tsunami debris. Added mass and velocity necessary for the calculation in the formula was investigated by impact experiment in the tank with water. The increase of the force due to the added mass was not observed in the stationary water, rather the decrease of the force due to the influence of water on the impacted object. The decrease of the velocity was confirmed when the flat surface impacted against each other with water.
