RE:M6.7 quake hits Hokkaido Three reactors at the Tomari nuclear plant were offline, but they are running on backup generators after losing external power because of the island-wide blackouts that also caused power loss at all 2.9 million households and disrupted traffic, Japan’s Nuclear Regulation Authority said. Spent fuel in storage pools was safely cooled on backup power that can last for a week, the agency said.
The 2011 earthquake and tsunami in northern Japan destroyed both external and backup power to the Fukushima Dai-ichi nuclear plant, causing meltdowns.