Japan orders utility to release radioactive vapour to save nuke reactor, emergency at another

TOKYO - Japan has declared a state of emergency at another nuclear power plant after a cooling system at its three reactor units failed following a massive earthquake. There has been no radiation leak.

Japan's nuclear safety agency is also set to order a plant operator of another plant to release slightly radioactive vapour to protect the reactor from damage.

Altogether, five reactor units - two at the Fukushima No. 1 plant and three at nearby Fukushima No. 2 plant - are in a state of emergency. All five plants have shut down after the massive quake Friday.

Officials said earlier that only one of the two Fukushima No. 1 plant's units had cooling problems resulting from power outages. They now say both units are troubled.