TOKYO -- Operators of Japan's damaged nuclear power plant have deliberately dumped 10,000 tons of tainted water into the ocean -- to make room at a storage site for water that is even more highly radioactive.
The water that was dumped today has a level of radioactivity about 500 times above the legal limit.
Workers today have also been using a dye to try to help trace the path of radioactive water seeping from the plant.
They discovered a crack in a maintenance pit over the weekend -- the latest evidence that radioactivity is still spilling into the environment. But officials still can't say for sure that the pit is the source of the leak.
They tried over the weekend to clog the leak with a special polymer, sawdust, and even shredded newspapers -- but those efforts failed.
The radioactive water that is pooling around the plant is keeping workers from powering-up the cooling systems that are needed to stabilize the fuel rods.