2011 Sendai Earthquake And Tsunami, Tōhoku Region, Pacific Ocean

On 13 March the lowest-level state of emergency was declared regarding the Onagawa plant by TEPCO, as radioactivity readings temporarily exceeded allowed levels in the area of the plant. TEPCO stated this was due to radiation from the Fukushima I nuclear accidents and not from the Onagawa plant itself.
Tōkai Nuclear Power Plant
The number 2 reactor was one of eleven nuclear reactors to be shut down automatically. It was reported on 14 March that a cooling system pump for the number 2 reactor had stopped working. Japan Atomic Power Company stated that there was a second operational pump and cooling was working, but that two of three diesel generators used to power the cooling system were out of order.