Re: Anyone for a swim?
Depends if it's a nice clean one or an old one where the "stuff" in it has been corroding for the last 50 years and no one recalls what the "stuff" was in the first place an. In some the water is as opaque as milk of magnesia.
http://www.world-nuclear-news.org/uploadedImages/wnn/Images/PFSP%20metal%20removal%20460%20(Sellafield).jpg