@engineer,
the 700K tons, will it be a stream or a batch? If its a batch Id be concernd because the Kurishio currents are clockwise and will be in the areas of Hawaii and our West Coast . 3H, a weak ionizer, is still a problem if ingested and since its acting just as water itll all pass through the urogenital tract to be eliminated.
If ingested or otherwise taken internally, its a problem that would require it to be addressed as a contaminant.
I recall all the building emergency Exit signs that were taken to the Freshkills Landfill after 9/11. Someone finally noted that the reason the phosphors were glowing in the landfill was because there was no special handling at first.
Still, for Fukushima, thats a lot of Tritiated water, I think they should keep it out the current. Markets being what they are, noone will listen to the "its ok, beta int as bad as gamma or alpha". I wouldnt buy tock in Mrs Paul's