I want to become a nuclear scientist. Iam currently in the class 12th.
As per your question,If you directly join India's prominent Institute like BARC, IGCAR for nuclear engineering, you either must have good gate score or you have above 99 percentile in BARC OCES examination.
If you want to pursue in UGC certified colleges these are some colleges which provides Nuclear engineering program: IIT,kanpur, Pandit Deendayal Petroleum University,Gandhinagar.
TADA after completing two years you will be Nuclear Scientist.
Hope this information is relevant to your question.
Thank you:)