Iran's nuclear program is undoubtedly peaceful and the West knows about it, Iranian President Hassan Rouhani said.

"The International Atomic Energy Agency (IAEA) conducted thousands of hours of inspections in Iran's nuclear program and found no indication of diversion to weapons-grade activities," Iran Daily quoted Rouhani as saying at a ceremony to award scientists here on Sunday. "All of them (Western powers) have no doubt that nuclear science in this country follows a peaceful course."

Iran Daily reported Rouhani's remarks on Monday.

Tehran is a signatory to Non-Proliferation Treaty (NPT) and has not violated it, Rouhani said.

"If Iran was after producing weapons of mass destruction (WMDs), it was easier to build chemical and biological arms," he said, adding that building WMDs has not been in Iran's defensive doctrine and his country considers making them as its "red line."

In addition, Rouhani said that Iran's religious beliefs and moral principles do not allow the Islamic republic's nuclear activities to be diverted to weapons-grade programs.

Even if there were no NPT or other treaties, these beliefs would never allow Iran to get closer to the production of WMDs, he added.