Alpha particles (high energy bare Helium nuclei actually) and beta particles (high energy electrons actually) don't "go into your blood", they are just absorbed

Alpha particles (high energy bare Helium nuclei actually) and beta particles (high energy electrons actually) don't "go into your blood", they are just absorbed by atoms in your skin and they break a few molecules those atoms were part of along the way. If they go deep enough they make break up some DNA in you skin cells. If they would get to the blood they would just be absorbed by the blood itself and break some molecules that float in the blood - which would be pretty harmless. If the dose is really big they may even turn some atoms in your skin's cell radioactive and yeah, these could then go around your body, but at such a dose you'd have burns on your skin already. Her biggest problem from holding something like that radioactive grain in hand would be the gamma rays causing mutations in the cells in her hand that would then lead to cancer in the log term. Like I'd imagine she will be sick with some bone cancer or leukemia or a random sarcoma in like 10 - 15 years from now. Maybe even longer if she has inherited some good DNA-repair genes and anti-cancer-immunity genes. Or sooner if she wasn't so lucky at the genetic lottery and if she has other risk factors too... And then there's the radioactive dust... I'd imagine she has inhaled quite a lot of it along her trips, and this is probably her biggest short term (think "less than 10 years") concern.