Kyodo news reports:
Tokyo Electric Power Co. on Monday took the unprecedented measure of dumping 10,000 tons of low-level radioactive water in the Pacific Ocean from a facility at its crippled Fukushima Daiichi nuclear power complex to make room for the storage of more highly contaminated water, which is hampering restoration work at the plant.
Nishiyama also said that it had become necessary to release 1,500 tons of groundwater, also containing radioactive materials, found near the Nos. 5 and 6 reactor turbine buildings out of concern that the water could drown safety-related equipment.
Of course, the government said there was "no major health risk", even though:
The level of radioactive substances in the water is up to 500 times the legal limit permitted for release in the environment.