- Associated Press - Monday, August 16, 2010

TEHRAN, Iran | Iran said Monday it will begin building a new site to enrich uranium by March, moving ahead with a plan that defies international efforts to curb its nuclear development.

Enriching uranium creates fuel for nuclear power plants but also can produce the material for weapons, if taken to higher levels, and Iran’s growing capacity in this process is at the center of its dispute with the international community.

The U.N. Security Council already has passed four sets of sanctions against Iran to try to force it to stop enriching uranium.

Last year, Iran flouted international concerns by claiming it would build 10 new enrichment plants, and Monday’s announcement said the locations for the sites have been determined but gave no details.

“Construction of a new uranium enrichment site will begin by the end of [the Iranian] year [in March] or early next year,” Vice President Ali Akbar Salehi said. “The new enrichment facilities will be built inside mountains.”

Revelations a year ago of a previously undisclosed enrichment facility in a secret mountain base near the city of Qom inflamed international suspicions over Iran’s enrichment program and helped spur a fourth set of international sanctions in June.

The U.S. and its allies accuse Iran of using its civilian nuclear program as a cover to develop a nuclear weapons capability. Iran has denied the accusation, saying its nuclear program is geared merely toward generating electricity.

British Prime Minister David Cameron’s spokesman, Steve Field, said Mr. Salehi’s announcement was a cause for concern.

“The reports that we have seen this morning certainly do not give us any comfort that Iran is moving in the right direction,” Mr. Field told reporters.

Iran has an industrial-scale, internationally supervised enrichment site in Natanz, in central Iran, with around 6,000 operating centrifuges and a smaller one under construction near Qom.

The Islamic republic said it needs 20 large-scale sites to meet domestic electricity needs of 20,000 megawatts in the next 15 years.

President Mahmoud Ahmadinejad on Monday also officially notified the government of the implementation of a new law banning the government from anything except the most minimum level of cooperation with the International Atomic Energy Agency, the U.N. nuclear watchdog.

The law is seen as a retaliation for the sanctions and includes a provision authorizing the Iranian government to retaliate against any countries that attempt to search its ships or airplanes for dual-use materials with inspections of their own.

The Iranian law also requires the government to continue refining uranium up to 20 percent to fuel a small medical research reactor in Tehran.