IAEO head Fereydoon Abbasi Davani was quoted by AFP as saying to the state television that there were no particular problems.
"After a two-month shutdown needed to check the fuel and the reactor, the Bushehr power plant was linked to the national grid on Saturday and reached its full capacity of 1,000 megawatts", said Davani.
Located in the Bushehr province, the nuclear power station was started by Germany before Iranian revolution and later completed by Russian firm Rosatom. The plant was officially commissioned in August 2010.
