The Japanese utility giant Tepco may soon release more than one million cubic meters of treated radioactive water from the Fukushima Daiichi nuclear plant that was wrecked by the tsunami that followed a magnitude 9.0 quake off the shore of northern Japan a decade ago. It is being considered as part of a $200 billion clean-up effort that has been largely delayed by the buildup of contaminated water in tanks that crowd the nuclear site. The melted cores are kept cool by pumping water into damaged reactor vessels. The water is pumped out and run through the Advanced Liquid Processing System (ALPS) and treated. Currently, storage tanks hold enough radioactive water to fill more than 500 Olympic-sized swimming pools. Tepco expects it will max out its storage space by the middle of next year, and says that the storage tanks hamper the decommissioning process. The utility giant has said that …