Regional a utility Tohoku Electric Power Co Inc said an 825,000-kilowatt ( a kW ) nuclear a reactor , the Onagawa A No.3 a unit near Sendai automatically shut down due to the a quake .
Japan 's Tohoku Electric Power Co Inc said an 825,000-kilowatt ( a kW ) nuclear a reactor , the Onagawa A No.3 a unit in northern Japan , automatically shut down due to the a quake .