I have never worked in corrections but I did work in inpatient psych (we cared for many inmates) & the style of nursing & environment is VERY similar - high level of verbal & nonverbal respect, no shoelaces, paper clips, belts, etc. In terms of safety, I feel it is safer than being in a hospital. I have been assaulted waaay more by patients in a hospital, but got socked in my arm ONCE during my stint as an inpatient psych nurse. Allow me to say that it was MY FAULT because I let my guard down - the patient was in a wheelchair & I could feel that she was about to hit me on her way into the seclusion room, but I didn't trust my gut & when she rolled by me I ignored all instincts to move out of the way & then she punched me HARD in my arm.
When I became an RN, I seriously considered working in corrections because I found much satisfaction in such a structured & safe environment, but the application process was too extensive & time consuming, so if you really want to work out here I suggest you get the process started pronto.
The only bad thing I have to say about corrections up here in NorCal is that I've heard of facilities having mandates. Good luck in your search