This is a fascinating process. I had an isolated room for about 3 days . No one could come in. I had a telephone line, lots of books,, dvds, radio and tv. It was a case of drinking gallons of water and peeing out the radiation in a special hospital suit. I really enjoyed it in an odd way.
It is so odd being alone but at one time I imagined I was joined by a very chatty bunch of dead female relatives headed by my old mum. Weird but fun.
The more you drink, the quicker they let you go home ,after testing you with Geiger counter.
I think I had 3 weeks off teaching as I couldn't be near children.