You have the same I&C background as when I started, so here's my advice,....
You need to take nuclear industry training next. A lot of people don't know this, but you can take classes at your nearest DOE site. Because they are funded by public money, they are open to all. It comes at a price $, but the instructers there will help get you in. If I were you, I'd go the non-manual route and take Passport or SAP classes and think about being a planner or engineering support roles. The industry of late, will hire people directly off the street for these and other non-manual positions because they're more concerned about how efficent you are with a computer than what you know about a nuclear plant. It's a faster route.
If you're thinking about contracting as an I&C tech, the certification process to be a level II, or journeyman, as a supplemental was a very long and complicated process that took years, and I don't think the industry offers it anymore. So you'll have to go in-house. They're very touchy about who they let work on their plant equipment, especially I&C. I recently found out there were less than a hundred of us left from the old days, and many have been kicked upstairs to these non-manual roles. The best you can hope for is being a helper.
