[pvaldes]

> Water cannot be radioactive

To start, seawater has more things than water. Both Hydrogen and Oxygen have isotopes that can decay and emit radioactivity, so yes, water can definitely be radioactive, by definition. For a relatively short time because is not plutonium of course, but it can be.

And, unlike Plutonium, the problem is that life beings are mostly made of water and we didn't coevolved with a such rare element as tritium is in nature. Water is freely allowed to enter and travel and has granted access to every part of the human body. We trade a big danger for other, but this does not mean that radioactive water can't harm us.

[u320]

Tritium has a biological half-life in humans of 8 days. It's not a "big danger". Japan has gone out of their way to take all the precautions here, but since it's nuclear you know somebody is going to raise a stink anyway.

[pvaldes]

We share the planet with other organisms, and we even eat some of them.

"Is not a danger" here means "we don't know and, as long as liability is impossible to be traced back to us, we don't care".