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 co...
英字タイトル:
Damping Characteristic Evaluations of BWR Spent Fuel Storage Racks

The massive earthquake struck Onagawa nuclear power plant on March 11, 2011, and the nuclear reactor and the steam turbine was shut-down automatically. As a result of the post-earthquake steam turbine inspection, remarkable damages have been confirmed on the turbine blades and the bearing stands, and currently the restoration works have been conducted. This report introduces the damage status of the steam turbine caused by the earthquake, and activities of restoration work. ...
英字タイトル:
Post-earthquake restoration work of the steam turbine at Onagawa Nuclear Power Plant