TEPCO to open second Fukushima reactor building

Of the six reactors at the Fukushima Daiichi plant, reactors one to four were heavily damaged by the 9.0-magnitude earthquake and deadly tsunami on March 11.

Last month, TEPCO opened a door for the structure housing reactor number one, and began work to build a system to cool it stably.

Junichi Matsumoto, TEPCO's nuclear official said the entrance to the reactor number two building would slowly be opened from Sunday evening "to make sure dust inside the building will not fly away".

"We believe this action should result in no impact to the environment," he said, adding that it should lower the 99.9-percent humidity inside the building.

Workers will then enter the facility to check on measuring tools inside and eventually start work to inject nitrogen into the reactor to prevent an explosion.

The world's worst nuclear accident since Chernobyl in 1986 has caused radioactive material to spew into the air, ground and sea and forced the evacuation of 80,000 people in a 20-kilometre radius.

Workers have pumped water into reactor cores and fuel rod pools, leaving more than 100,000 tonnes of contaminated water in basements, drains and ditches, some of which has leaked into the ocean.

Copyright AFP (Agence France-Presse), 2011