I, too, had taken a "vacation" from the nuke world for several years. When I came back into the fold, I had to redo my fingerprints, pass the NUF/NEU exam and get over my trepidations as to what all I thought I had forgotten.
Once back in the plant all dressed out in my PCs and a meter hanging off my shoulder, it all came flooding back and I did just fine - well, I thought I did but there might be differing opinions out there.
Really, there ain't nothing for it but to just do it. Have fun.
Michael