    Sentence 1: Regional utility Tohoku Electric Power  Co Inc said an 825,000-kilowatt ( KW ) nuclear  reactor , the Onagawa No.3 unit near Sendai  automatically shut down due to the quake         Sentence 2: Japan 's Tohoku Electric Power Co  Inc said an 825,000-kilowatt ( kW ) nuclear  reactor , the Onagawa No.3 unit in northern  Japan , automatically shut down due to the  quake