isn't radioactive water like cordial, you only need a small amount to change a much larger body of water?
I'm not sure what you mean here. Radioactive water is just water with some radioactive atoms dissolved in it. The total number of radioactive atoms in the million tons of radioactive water is fixed; they don't multiply. (In fact the number gradually decreases as the radioactive atoms decay.)
if that drop is highly radioactive and spreads in the currents, wouldn't that be enough to cause serious damage?
It will get diluted as it spreads; that was my point. The waters off the coast where Fukushima is are certainly not safe to fish in right now; but that's because the radioactivity is concentrated in a much smaller volume of water.
I'm not sure what you mean here. Radioactive water is just water with some radioactive atoms dissolved in it. The total number of radioactive atoms in the million tons of radioactive water is fixed; they don't multiply. (In fact the number gradually decreases as the radioactive atoms decay.)
if that drop is highly radioactive and spreads in the currents, wouldn't that be enough to cause serious damage?
It will get diluted as it spreads; that was my point. The waters off the coast where Fukushima is are certainly not safe to fish in right now; but that's because the radioactivity is concentrated in a much smaller volume of water.