BWR使用済燃料貯蔵ラックの減衰特性評価
Damping Characteristic Evaluations of BWR Spent Fuel Storage Racks
著者:
草階 達朗 Tatsuo KUSAKAI 飯田 純 Jun IIDA 長坂 直 Naoshi NAGASAKA 渡邊 和 Urara WATANABE 前田 学 Manabu MAEDA
発刊日:
公開日:
BWRDamping ConstantNuclearSeismicShake testSpent Fuel Storage Rack
概要
The damping constant of the BWR spent fuel storage racks have been applied 1 % to evaluate seismic resistance, based on “Technical Guide for Seismic Design of Nuclear Power Plants” (JEAG 4601-1991) published by Japan Electric Association. Although some of nuclear operators in Japan that own similar racks have been applied 7% based on the past experiments results, the acceleration levels given to the racks were not high enough considering the scale of the current ground motion. Therefore, in order to confirm damping characteristics under conditions of higher acceleration and evaluate seismic resistant of the racks, we performed underwater shake tests using the simulant racks and fuels. As a result of the tests, we confirmed that there are tendency that the damping constant of the racks become bigger depending on the increase of the response acceleration, and it is more than 7% under the current ground motion conditions.
