Honestly? 120R in a hotwell?
Actually I think it has been in there for a while. We had some bad fuel leakers at BFN a few years ago, and we had some memorable hot spots under the condensers of both Units 1 and 2, and in other rooms. There was a place in the Reactor steam vault on U3 that had 1700 R/hr contact...it was in the overhead in a drain line. That one vanished, but it is out there someplace. I recall one of the condenser hot spots vanished after a couple cycles - perhaps it is this 120 R one and it was hung up somewhere inside and finally got back down into the hotwell.
Edit to add this: BFN often drains down the cavity to the condensers, so whatever nasty stuff was in the vessel area ends up in the hotwells.