Mortgage - Radioactive not Toxic

The above is from my home loan that I signed.

I'm not allowed to have radioactive materials at my house.At the same time, elsewhere on some other document that I initialed (that I don't seem to have any more) indicated that I would have a smoke detector.The interesting thing with that is the average smoke detector uses a few micro-curies of Americium as an alpha particle source to detect the smoke.I was really reading this. It's the biggest transaction that I've done up to that point (and in fact the biggest to date still).I pointed this out to the loan agent -- the fact that the documents are in conflict.He looked at me with an annoyed look and pointed at the where I should keep on initialing.Sometimes reading this stuff really doesn't do you any good I guess.