TEHRAN, Iran — Iran now controls the entire cycle for producing nuclear fuel with the opening of a new facility to produce uranium fuel pellets, the Iranian president said Saturday. Mahmoud Ahmadinejad made the speech two days after the inauguration of the facility which produces uranium oxide pellets for a planned 40-megawatt heavy-water nuclear reactor near the town of Arak, central Iran. Production of nuclear fuel pellets is the final step in the long, complicated chain of nuclear fuel cycle.