Almost any nuclear experience can get you in the door. Depending what schools you completed in the Navy and what your specific duties were, you could possibly start off as a Junior HP tech (I doubt you would have enough at any duty to be a senior tech with only 3 years in). If you have just a little experience you could start as a deconner, especially if you are local to a plant. For information on what experience might count, try this link:
http://www.nukeworker.com/forum/index.php/topic,4395.0/topicseen.htmlI assume you are in the eastern side of Pennsylvania since you mention Exelon (PECO is no more and was one of the companies that formed Exelon). That means you are near Peach Bottom, Limerick, or possibly TMI (an Exelon plant now but never a PECO plant.) All of those HP support contracts are held by Bartlett (
www.bartlettnuclear.com). Their contact information is on their web page and their recruiters are very helpful. There is also a lot of job information on this site (surprisingly enough, under the "Jobs" tab) although most of that is not entry level, if that is what you qualify for.
As for salary information... that is way to wide a target to guess at. Depends on what you are qualified to do, where and how much you want to work and how hard you are willing to work to get what you want. There is a lot of money to be made if you are ambitious, willing to work hard and build up a good reputation, and flexible. However, it can be hard on families and you have to be willing to occasionally put up with some less-than-desirable situations (having been in the Navy I am sure you are familiar with them.)
Good luck to you. Keep in touch with NukeWorker, and if you do get back in the industry send in part of one of those big paychecks!