Cheap is good. Sloglo is right. If you contact the site (or the contract companies site coordinator), they can hook you up. True for both DOE and commercil power.
If you can search the web for 10CFR835 (you don't need to buy it), read it. Some (most) of it will seem same-old, but there are some things done differently from 389-0153.
The DOE core shouldn't be a math or physics challenge for an NPS graduate, but some of the area definitions are different enough to trip you up. The parts I review every other year (2 year requal cycle)are the contribution of various natural sources to background radiation and the significant dates. The DOE core exam consists of 6 to 10??? parts, each of which need a score of 80% to pass. Not all sites test all parts.
As far as what to expect when you deal with DOE (or commercial power) vs USN....
On the boat, your salary is fixed by rank and time in, leaking contaminated systems don't exist, every piece of radioactive material is tagged and inventoried, every worker graduated NPS and NPTU.
In the DOE (or commercial) world, you have defined 8 or 10 hour workdays, overtime pay for anything over 40 hrs/wk$$$. Shockingly high levels and lax control of contamination and radioactive material. Poor training and practice by radiological workers.
That last may seem cynical, but here is an axiom that may help. If it weren't so f_____ u_ I wouldn't have a job. The DOE sites I've been working at for the last 9 years were all shut down at least 5 years before I got there
One of the beauties of being ex-nuc is that you will have a useful insight into the other persons job since you used to do some of them. Use your experience to anticipate problems during the pre-job brief and most of them won't materialize.