The earthquake-crippled Fukushima No. 1 nuclear plant suffered a dangerous radiation leak Tuesday in the wake of two new explosions and a fire as officials on site scrambled to avert a meltdown.
At 10:22 a.m., a radioactivity monitoring post near the No. 3 reactor showed 400 millisieverts per hour, 400 times the amount an ordinary person is exposed to in a year.
The figure was 100 millisieverts per hour near the No. 4 reactor and 30 millisieverts per hour between the No. 2 and No. 3 reactors.