Yes, I'm asking that. Because all sea water is irradiated anyway, the effects depend on the amount of radiation in the water. So, what problems is this water entering the sea causing?
My understanding is not all isotopes are equally hazardous. The stuff coming with the reactor-contaminated water is particularly harmful to the marine environment and people of Japan, and not normally present at such levels in the surrounding waters.
The half-life as I understand it is relatively short for the especially harmful stuff, but that's not so helpful if leaks are ongoing.
The half-life as I understand it is relatively short for the especially harmful stuff, but that's not so helpful if leaks are ongoing.