Is it for peacful purposes?

The question I am try to get answer to is the following:
Are Iranian Mullahs after making nuclear weapon?

The answer is: it is not clear yet.
(a solid YES or NO would be a wrong answer, unless you are the Mullah)

Until few months ago, I thought they have taken steps towards making a nuclear bomb. But they haven’t. They have had the centrifuges, the yellow cake, and no trace of highly enriched material. The later was the part I doubted, but after IAEA’s close inspections of the sites, I am pretty sure there is no enriched material that the mullahs can use for making a bomb. Otherwise it would have been on the headline news for weeks (and BTW, there would have been no nuclear talks between EU and Iran) .

The tones seem to be changing too. They frequency of calling it a "weapons program" is reducing in the news and the concerns are more over "diverting to weapons program". Financial Times article on Feb 04 writes:

"But the EU says it cannot deliver until it has assurances that Iran's programme will not be used to develop weapons. Contrary to US assertions that Iran has a military nuclear weapons programme, Tehran maintains its programme is peaceful."

I guess that is an achievement for Iran's government to convince -at least- some EU diplomats that its current nuclear program is for peaceful purposes.

The question that is raised at this point is:
Why does such a religious dictatorship government become suddenly so determined to build Iran’s nuclear powerplants? Let’s talk about it later.