Power transmission problems temporarily halted cooling systems for spent nuclear fuel facilities at both the Fukushima No. 1 and No. 2 nuclear plants Tuesday afternoon, as well as nitrogen injections into the wrecked No. 1 plant’s crippled reactors, Tokyo Electric Power Co. said.
The power glitch also disrupted contaminated water treatment systems at the two plants, Tepco said.
The systems were halted after a power facility in Tamura, Fukushima Prefecture, experienced difficulties at around 4:10 p.m. Tuesday, reducing the supply of electricity to the two power stations.
But engineers were able to restart nitrogen injections into the containment vessels of the three destroyed reactors at the No. 1 plant — necessary to prevent hydrogen explosions — at around 5 p.m., and the systems for spent fuel cooling and water treatment at both plants resumed later in the day as power was gradually restored.