USA does not like the amicable relationship between India-Iran and also India-China. If India-China relationship gets stronger, then both these can rule the Eastern Part of the Globe which USA wants to break as per their divide & rule.
By signing this agreement, USA wants India to depend on it for producing power which is going to be a crucial factor in future. There is a talk of bringing Natural Gas from Iran to India with a big pipeline project. USA doesn't like this proposal.
Atomic Power Technology
Whether power is produced or Bomb is produced, using Atomic power without spoiling the infrastructure and without allowing the radiation is always under threat. Moreover preserving the wastes coming out of Atomic Power Plants is expensive & unsafe.
There was an accident in Three Miles Island in USA. To close this plant nearly USD 200 Crores spent with tons & tons of concrete but yet to be fully closed.
In an another accident at Soviet Union's Serbia Plant, even the next generation child are affected due to the radiation.
It will be very very expensive to defuse & close down an Atomic Power Plant than its construction cost.
France
France has got 56 Nuclear Power stations producing 73% of the country's total power requirement. They are catching up the problem of eliminating the wastes / emissions from out of those plants at the same time increase the power production capacity. Government of France is now