Nuclear waste water are two fold.<br>Theres the coing water, which is perfectly safe to swim in.<br>And theres the water used to boil and power the turbines, which is not safe. At all!<br>That is the water that leaked in fukushima.<br><br>The cooling water, the water that's used to manage the temperature of the reactor abd that gets turned into the steam clouds comming from the cooling tower, is perfectly safe to use though.<br>The two systems are kept fully seperate and theres protective filters between them both, so theres no sign left that the cooling water was in a nucler power plant.