Recently hired Exelon Direct SRO ILT here. Starting salary was in the six figures, five figure signing bonus, plus annual profit sharing bonuses; also when you're in class you'll receive a percentage of your annual SRO license bonus, also when you're on shift you'll get a shift work Premium. They also offered up to $10k in moving assistance (but I had to ask for it, they did not initially offer it). Keep in mind, different plants may have different offerings, based on their manning needs.
Nothing will be paid until you actually start work (and you'll have to pass all of the psych and physical exams before your first day of work). The moving assistance is handled through a 3rd party, so unless your move costs more than the $10,000 you won't pay anything out of pocket.
emcwife20+, if you have any questions about the process I'd love to answer them for you.
Hope that helps.