Moscow - Iran's first atomic power plant, a symbol of what the Islamic Republic says is its peaceful nuclear ambition, is now operating at full capacity, Russia's state nuclear corporation Rosatom said on Friday. The Russian-built 1,000-megawatt reactor near the Gulf city of Bushehr, was plugged into Iran's national grid last September, ending years of delays and suspicions that Moscow was using the project as a diplomatic lever. Oil-rich Iran says electricity generation is the main motivation for nuclear work that its adversaries say is really aimed at getting atomic weapons capability.