I was an ELT, an operator, a Chem Tech, and now i am an HP. I think being a chemtech is like being an ELT except you have to qualify on many more analysis, much more involved technically. For instance, you will be looking for specific Isotopic Analysis now instead of just Uci/ml. And you aren't allowed to operate as many valves as you used to be since you are only a Chem Tech now. At some plants chemtechs are back-up HPs in some cases. they don't do too much HP stuff usually. In an outage chemtechs support outage work but the job doesn't change as much for chemtechs as some other jobs. you still have to get samples, just some different ones. you may do more samples that aren't normally done during non-outage. at some plants (like Salem) chemtechs do some operations stuff, like operating filtration and demin systems. many plants have pure water supplied by a culligan man type of guy so there will be no Demin plant to run USUALLLY. Fermi, where i grew up, is cheap to live, but do you really want to live there?
anyway, calvert is nice, but I think it is fairly expensive, but maybe not as expensive as say Pilgrim in massachuss.
perform analysis on SG, primary, FW, PW many others
training
refill demin beds
some maintenance on a few systems
discharge logs in some cases
some plants the chemtechs refill chemicals nesc. for plant operation (sux!)
rotating shiftwork at SOME plants, but usually a combination of straight days with some shiftwork every now and then
operate Non Rad Waste at some plants