Emfuser,
Do you really have to be a nuclear engineer? A lot of software engineers in my company don't have a degree in software engineering. We have physicists, chemist, and mathematicians doing other kinds of engineering like software or test engineering. Also I know a lot of engineers get a job in marketing or become a financial consultant right out of college.
Look. If there are limited jobs available in your field, that means some will be forced to switch field eventually. That is something for you to think about.
Another thing is, it is important for you to find a job in anything right now. You can be a waiter or a garbage collector. Anything is good. During a job interview, if the interviewers know you are working a shit job while you are unemployed, you can be labeled as a self-motivator or hard worker. It will make you look good.