I work in the nuclear industry and have worked with quite a number of individuals who have come from the US Navy nuclear program. They were, all of them, excellent workers and extremely knowledgeable.
The US nuclear navy program has an excellent history of performance. US navy reactors have a stellar record.
One of the keys to that success is strict procedural compliance. Procedures drive everything. Everything that is done is done based on a documented, reviewed and approved procedure. If a situation is encountered not covered by procedure, no one is permitted to come up with a work-around or improvisation. No one (not even the CO) has the authority to deviate from procedures.