Reads like a scary novel.. but, it's real.

"With just centimeters remaining before the radioactive water overtops its storage, however, another release of contaminated water into the ocean looks ever more likely. Already, pools of this water burned at least two workers at the plant when they stepped in the puddles, and TEPCO was forced to dump more than 11,000 metric tons of such contaminated water in early April."
http://www.scientificamerican.com/article.cfm?id=fukushima-meltdown-radioactive-flood

11,000 metric tons of water...11 000 000 kilograms = 24,250,848.84 pounds 

At 8.35 gal/lb = 2,904,293.27 gallons/660,000 gallons = 4.5 OLYMPIC SWIMMING POOLS.

Water hot enough to burn...A cubic mile is one trillion gallons.  

If this water is, say, 1000ppm radioactive, that would be an additional .001 radioactive stuff per gallon.

The radiation in one gallon will be spread to 1,000,000 gallons, still sounds like a lot to me!

HazMat folk say: "The solution to pollution is dilution" and, unfortunately we may find out if that's true in this case...

They will be spraying coolant on these reactors for several decades, minimum...

FRISH