GC, so if I went the sub route I would do my 3 year sea tour and then do 2 shore duty at NR if I did well on the PNEO? Would there be any way to study for the PNEO before hand? I've always been good at science so I'm sure I'll do well during A-School and NNPS. Also, my nuclear recruiter told me that I was eligible for ET(N), do you know if that that would possibly help with STA-21? And would you recommend ET(N) in the event I don't get picked up for STA-21? I've done some research on it and it looks like a good deal but I would just like the opinion of someone who's been in the nuclear field.
You are correct on JO career path....3 year sea tour, two year shore duty. Getting a shore duty at NR is as much about timing as it is doing well on your PNEO exam. There has to be a billet open for you to go in to.
PNEO exam consists of a reactor theory section, a fluids section, an electrical section, a chem/radcon section, and an operational section. It consists of written test, and oral exam which is in DC at NR Headquarters. The written test will always have reactor theory. The oral exam will always have operations. Whatever section you don't get written will be your other oral section.
So, you can effectively start studying for your PNEO exam the day you start A School

Anyway, all rates have their pluses and minuses....I've known good officers who were prior from every rate.
Cheers,
GC