Nuclear engineering is an exciting specialized field, which is not something you can pick up at high school or community college level. Nuclear engineering is mostly used in jobs involving generation of electricity from a nuclear power source as opposed to other sources (e.g., fossil fuel, water as in case of a dam, gas, solar, wind). It requires understanding of nuclear physics (study of interactions and phenomenas that happen at the nucleus of an atom involving neutrons, protons, electrons), thermodynamics (study of the relationship between heat and other form of energy (eg. mechanical, electrical, chemical)), thermohydraulics (study of how energy flows from one form to another), material science (study of different properties of material including their melting points, freezing points, etc), and many other specialized fields needed to understand how electricity can be produced from nuclear energy.
As a result, it is essential that you attend a university to study nuclear physics and basic engineering concepts and earn a bachelor degree in either engineering physics, or nuclear engineering.
In addition, a bachelor degree offers higher paying jobs and opportunities for future growth, even if you decide not to pursue your original nuclear engineering degree.
This is because, a bachelor degree not only broadens your knowledge beyond basic skills, it also demonstrates to the employers that you can learn, collaborate and that you are dedicated and can stick with a job.
Hope this helps. Please send me a note if you want specific information about what I had to take as part of my nuclear engineering degree.
Sara Dolatshahi, P. Eng.