I knew that you were not IIT material .... you just proved it.
The deal will benefit the US corporations who will provide India with technology and fuel. India will be buying that stuff and pay for it in US$. The US companies get revenue, USA has a big balance of trade deficit, so it helps the balance in their favopr a little and India gets a cheaper source of energy. It works to everyone's benefit.
except of course BJP's and commies' who are opposed to the deal for political reasons.