If his schedule is like most others going to nuke school (only school the Navy has in SC), he will have Friday afternoon and early evening off, then return to RTC at curfew. Chances are he will fly out on Saturday morning, although now and then it is Sunday or Monday.
He will have an opportunity to take leave after A school, before he begins Power School. Coming home directly after boot camp is much more an Army or Marine thing.
I left info on your My Page about the Nuclear Field, including groups and info that will help you to plan PIR weekend.