Tepco’s ill-considered efforts to change soil permeability and water flow have caused severe problems at the site … including highly radioactive groundwater bubbling up to the surface.
NHK notes:
The vice governor of Fukushima Prefecture has asked the government to take the lead in handling the matter and stop the leakage. Masao Uchibori told an official from the Nuclear Regulation Authority that some of Tepco’s measures have increased the risk of further leaks.
The Wall Street Journal’s Michael Arnold says:
Obviously this is a massive public health issue … if it gets into the ocean obviously this could be spread throughout the Pacific, could also get into the food supply.
But there is another – stunning – threat.
Specifically, BBC points out:
Engineers are now facing a new emergency. The Fukushima plant sits smack in the middle of an underground aquifer. Deep beneath the ground, the site is rapidly being overwhelmed by water.
What happens when you pour hundreds of thousands of tons of water (400 metric tons each day times 2.5 years times 365 days in a year equals 365,000 metric tons of water) onto soil which sits above a massive aquifer?