Step 1: Understanding the Question:
Nuclear power plants generate electricity by splitting the nucleus of certain heavy radioactive elements, and this fission process needs specific minerals as raw material.
Step 2: Naming two minerals.
Uranium is the primary fuel for nuclear reactors, used because its atoms readily undergo fission and release large amounts of energy. Thorium is the second key mineral, and India holds one of the world's largest thorium reserves in its monazite beach sands, planned as fuel for future reactors.
Final Answer:
Uranium and thorium are two important minerals used in producing nuclear energy.\[ \boxed{\text{Uranium, Thorium}} \]