The Iranian flag flies outside the reactor building of the Bushehr nuclear plant. Iran was testing its long-delayed first nuclear power plant on Wednesday as it pressed ahead with its controversial atomic drive despite international sanctions. Gholamreza Aghazadeh, head of Iran s Atomic Energy Organization, said Wednesday that Iran has not changed its nuclear plan and will continue to install more centrifuges. "Our plan to install and run centrifuges is not based on political conditions. We have a plan and we will go ahead with it," Aghazadeh told a joint press conference with Sergei Kiriyenko, head of Russia s Rosatom state nuclear energy corporation. "Currently we have 6,000 running centrifuges in Natanz and we will increase our activities to install more by the end of next (Iranian) year (to March 2010)," Aghazadeh said, without specifying the amount of centrifuges to be increased. He said that the United States should face reality and accept living with "a nuclear Iran." He also said that Iran will announce a fresh nuclear achievement on April 9, and according to Iran s nuclear plan up to50,000 centrifuges will be installed in the next five years. Iran Wednesday launched a test run of its first nuclear power plant built by a Russian contractor near the southern Iranian port city of Bushehr. Aghazadeh and Kiriyenko were present at the site to inspect the trial run of the power plant. The 1,000-megawatt nuclear power plant, which had been scheduled for operation in 2007, is expected to be put in use by the end of this year after repeated delays.