TEHRAN, Iran — Ahead of the start of a nuclear deal between Iran and world powers, an official in the Islamic Republic has called limiting uranium enrichment and diluting its stockpile the country's "most important commitments."

On Monday, Iran will open its nuclear facilities to international inspectors and limit its enrichment of uranium. In exchange, Iran will see some economic sanctions lifted by the West.

That's part of a deal struck in November between it and the so-called P5+1 countries — Britain, China, France, Germany, Russia and the United States.

Iranian state radio quoted Behrouz Kamalvandi, a spokesman of Iran's atomic department, saying Sunday that the "suspension of 20-percent enrichment of uranium — and the diluting of the current stockpile of enriched uranium — are the most important commitments of our country."