I will go out on a limb and say that the Fuku
geology is now saturated with nuclear contamination.
There is continuous flow to the sea.
Only took a couple of years.
When it will end is anyone's guess.

The days when Tepco can hide the true extent of the contamination are quickly fading.




WSJ: Soaring radioactivity levels on coast of Fukushima plant — Nuclear material may have leeched from melted fuel cores and into environment
[link to enenews.com]