Nuclear plant power checks ordered
Japan's nuclear safety agency has told plant operators to check and improve outside power links to avoid earthquake-related breakdowns similar to those causing the country's current nuclear crisis.
A magnitude-5.9 aftershock has jolted the region north of Tokyo, but there were no initial reports of damage or risks from tsunamis similar to the one last month that crippled the Fukushima Dai-ichi power plant, causing Japan's worst nuclear plant disaster.
Thirteen nuclear plant operators, including Tokyo Electric Power Co (Tepco), which runs the radiation-leaking Fukushima plant, were told to check disaster resistance and report back by May 16, Hidehiko Nishiyama of the Nuclear and Industrial Safety Agency said.
Meanwhile, the newspaper Asahi Shimbun reported that a secret plan to dismantle Tepco was circulating within the government. The proposal calls for putting the privately-held company under close government supervision before putting it into bankruptcy and thoroughly restructuring its assets.
Most government offices are currently closed and the report could not be immediately confirmed.
Power outages during a strong aftershock on April 7 drove home the need to ensure that plants are able to continue to operate crucial cooling systems and other equipment despite earthquakes, tsunamis and other disasters, Mr Nishiyama said.
Utility companies were ordered to reinforce the quake resistance of power lines connected to each reactor or to rebuild them. They also must store all electrical equipment in watertight structures. The massive 46ft wave that swamped Fukushima Dai-ichi last month knocked out emergency generators meant to power cooling systems.
Since then, explosions, fires and other malfunctions have compounded efforts by Tepco to repair the plant and stem radiation leaks.
Earlier, the Nuclear and Industrial Safety Agency had ordered plant operators to store at least two emergency back-up generators per reactor and to install fire pumps and power supply vehicles as further precautions.
The crisis at the Fukushima plant has forced tens of thousands of people to evacuate to avoid exposure to radiation. On Friday Tepco announced plans to pay £7,300 initial compensation to each evacuated household. But many evacuees said the payment would be far too little to offset the losses and costs.