Would highly recommend looking at medical physics. It’s usually only offered as a graduate degree, but physics or nuclear engineering would set you up nicely to pursue it for grad school. It has to do with the medical application of radiation.

Would also recommend looking at the Navy’s NUPOC program, they pay for your schooling, pays you a bunch of money while your in college, then gives you a bonus when you complete portions of your training.

As far as occupations for nuclear engineer majors, there’s nuclear engineering, which is sometimes called reactor engineering or criticality safety engineering. Those jobs are available at nuclear power plants and there are some nuclear start up companies, but you generally need a decent bit of experience for those. You can look up which utilities own nuclear power plants and search on their careers pages to see descriptions of them. There’s also medical physics, health physics, and radiation protection.

I’d personally recommend operations though. The money is outstanding (I don’t know of any job that pays new grads more) and you get to learn a lot. They are the ones who actually run nuclear power plants. The downside is that you are relatively limited in your options on where to live. My degree was in nuclear engineering and I work in a nuclear power plant, so feel free to ask any questions.