At NITIE you wil be having the best techno managerial skills and the institute is very old so you can have the better exposure and learning. Also the placement is very good and the highest package offered was 30+ laks per anuum so it is a great deal to have. NPCIL is also a large govt. sector operating India's major nuclear plants. It is also a very good organization to join with. So you have good options you can choose anyone and also you can prefer NITIE as well. For the admission process a link s attached for the further information for both the institutes.

For NITIE, Mumbai: https://bschool.careers360.com/articles/nitie-mumbai-admission/amp#referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s

For NPCIL, https://engineering.careers360.com/articles/npcil-recruitment-through-gate