Japan uses colour dye to trace radioactive leak

Emergency crews at Japan's crippled Fukushima nuclear plant are using a colour dye to trace the source of a radioactive leak. It is believed seven tonnes of water with 10,000 times higher radioactivity than normal is escaping from the plant every hour.Emergency crews have tried unsuccessfully to plug a crack in a concrete pit in the plant's second reactor.

There are also plans to dump 11,500 tonnes of radioactive water at sea to free up storage space at the plant. The official told reporters that highly radioactive waste water has been accumulated at turbine buildings at Fukushima Daiichi, especially at the reactor unit 2.There is a need to release already stored water in order to accept the additional waste water. He said the release would take place as soon as necessary preparations are made.