Nuclear is a very clean energy source as you can see France derives 70%, and other EU countries, Japan and USA also derive major share of energy from nuclear, I agree same should be done here too.
But like I said #1 priority since we are responsible for security of 1/6th of humanity, is defense! If we can do with supercomputer stimulation of nuclear explosions, well and good.
I think way back in 1998 India claimed it doesn't need to carry out any more tests just after 5 tests, plus 1 test was in 1974, and it will do computer stimulations.