TEPCO April 14, to combat an aftershock of a nuclear power plant in Fukushima and began working for multiplexing external power supply route. Ceased temporarily supply of external power in the earthquake of intensity 6 lower on April 11, happens to stop over about 50 minutes the injection to the reactor, they become a pressing need to develop a system for ensuring the supply of emergency or.Currently, external power supply or two at the side of Unit No. 3 and 4 have been supplied by different routes. Together these two supply routes, to work for a power plant can be switched. Even if such an earthquake off one power line, make an arrangement that can be powered back up the other route.As a measure tsunami heights move irrigation pumps for temporary emergency diesel generator and reactor. Unit 1 is located around 10 meters above sea level, both moved to the hill about 20 meters. The height of the tsunami that hit the East first Fukushima earthquake was about 14 - 15 meters. Currently, the emergency power switch to perform manually, and it is impossible if a tsunami warning, there is a problem that workers away from the scene. By moving to a hill near the generator building and Kaname Shigeru Isolation of refuge workers, aims to restore power quickly.
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