1. To mitigate the perception of a low GPA, put your class rank in parentheses next to your GPA.
2. The best place to get a job after graduation is your school's job placement center. Seriously, what have you been doing the last couple of years? They are (were) a great source for summer internships so you would not be without some professional experience once. There will be many companies recruiting fall and spring, with Fall probably already over.
3. Get in touch with your school's Nuclear Societies. Become a member (you should have done this when you declared Nuclear 2-3 years ago). People from the industry will come to school to give presentations. They are also looking for smart people to hire. Make contacts! Talk shop afterwards. Talk about the industry. They will ask you for a resume if you seem smart, articulate, and humble.
4. Look at the mechanical/civil societies and see who is coming to campus and what are the events. See below companies. If they are coming try to make contacts with them after the presentation. They will hang around afterwards in mixers talking shop. Research what the company is doing and use it as a topic of discussion: " I see where Areva got a contract to build 10 nuclear plants in china, I bet you are excited Mr VP of engineering Areva guy" as an ice breaker.
5. Areva, Westinghouse, GE, Bechtel, Shaw, Sargent and Lundy hire nukes to support their construction/engineering (EPC). I will bet most, if not all, are on campus this fall (but you missed them). Sign up to interview with them.
I have a hard time believing this a serious post but I have answered to add general knowledge that might be of some help to freshman and sophomores.