TOKYO - The operator of Japan's crippled Fukushima Dai-ichi nuclear plant is preparing to open a door of a reactor building to allow workers to install a cooling system and equipment to prevent an explosion.
Tokyo Electric Power Co. says radiation that will be released by ventilating the Unit 2 reactor Sunday will be too small to threaten human health.
Meanwhile, more radioactive water is pooling at the tsunami-hit nuclear plant as workers scramble to restart a key cleanup system. It was shut down Saturday, hours after beginning full operations, because a component reached its radioactivity limit faster than expected.
Contaminated water could overflow within two weeks if action is not taken. At one location, water is 14 centimetres from spilling.
