A view of the reactor at the nuclear power plant in Bushehr, 1200 km (746 miles) south of Tehran February 25, 2009. REUTERS/Caren Firouz (IRAN) 

NUCLEAR-IRAN/ - Map locating Iran's nuclear facilities and uranium mine. Iran is to use domestically produced uranium yellowcake at its is Isfahan reactor for the first time. RNGS. (SIN02) 

NUCLEAR-IRAN/ - Map locating Iran's nuclear facilities and uranium mine. Iran is to use domestically produced uranium yellowcake at its is Isfahan reactor for the first time. RNGS. (SIN02) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A general view of a second reactor that is currently under construction in Bushehr nuclear power plant, 1,200 km (746 miles) south of Tehran, August 21, 2010. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. REUTERS/Raheb Homavandi (IRAN - Tags: POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A general view of the Bushehr main nuclear reactor, 1,200 km (746 miles) south of Tehran, August 21, 2010. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. REUTERS/Raheb Homavandi (IRAN - Tags: POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A security official stands in front of the Bushehr nuclear reactor, 1,200 km (746 miles) south of Tehran, August 21, 2010. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. REUTERS/Raheb Homavandi (IRAN - Tags: POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A general view of the Bushehr main nuclear reactor, 1,200 km (746 miles) south of Tehran, August 21, 2010. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. REUTERS/Raheb Homavandi (IRAN - Tags: BUSINESS ENERGY POLITICS) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A general view of the Bushehr main nuclear reactor, 1,200 km (746 miles) south of Tehran, August 21, 2010. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. REUTERS/Raheb Homavandi (IRAN - Tags: BUSINESS ENERGY POLITICS) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A security official talks to journalists in front of Bushehr main nuclear reactor, 1,200 km (746 miles) south of Tehran, August 21, 2010. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. REUTERS/Raheb Homavandi (IRAN - Tags: POLITICS ENERGY IMAGES OF THE DAY) 

Israel's President Shimon Peres (R) and Russia's Foreign Minister Sergei Lavrov shake hands after their meeting at Peres' residence in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS) 

Israel's President Shimon Peres (R) stands next to Russia's Foreign Minister Sergei Lavrov as he signs the guest book after their meeting at Peres' residence in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS ENERGY) 

Russia's Foreign Minister Sergei Lavrov attends a news conference with his Israeli counterpart Avigdor Lieberman (not pictured) after their meeting in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS ENERGY) 

Russia's Foreign Minister Sergei Lavrov (R) and his Israeli counterpart Avigdor Lieberman attend a joint news conference after their meeting in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS) 

Russia's Foreign Minister Sergei Lavrov listens during a joint statement with Palestinian President Mahmoud Abbas after their meeting at the Palestinian Authority headquarters in the West Bank city of Ramallah June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Mohamad Torokman (WEST BANK - Tags: POLITICS) 

Russia's Foreign Minister Sergei Lavrov is seen during a joint statement with Israel's President Shimon Peres (not pictured) after their meeting at Peres' residence in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS ENERGY) 

Palestinian President Mahmoud Abbas (R) and Russia's Foreign Minister Sergei Lavrov (L) give a joint statement after their meeting at the Palestinian Authority headquarters in the West Bank city of Ramallah June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Mohamad Torokman (WEST BANK - Tags: POLITICS) 

Israel's President Shimon Peres (R) and Russia's Foreign Minister Sergei Lavrov give a joint statement after their meeting at Peres' residence in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS ENERGY BUSINESS) 

Russia's Foreign Minister Sergei Lavrov (R) shakes hands with his Israeli counterpart Avigdor Lieberman before their meeting in Jerusalem June 29, 2010. Lavrov called for a meeting between Iran, the United States, Russia and the IAEA on nuclear fuel delivery for the Islamic Republic's medical reactor, Itar-TASS news agency reported. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Iranian President Mahmoud Ahmadinejad claps as he looks at an object representing nuclear fuel which will be used in Tehran's research reactor during a ceremony to mark the Fourth National Anniversary of Nuclear Technology, in Tehran April 9, 2010. Iran announced Friday it had developed faster centrifuges for uranium enrichment, signalling determination to press on with its nuclear work despite possible new U.N. sanctions sought by U.S. President Barack Obama. REUTERS/Morteza Nikoubazl (IRAN - Tags: ANNIVERSARY POLITICS ENERGY IMAGES OF THE DAY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Ali Akbar Salehi, head of Iran's Atomic Energy Organisation, claps as he looks at an object representing nuclear fuel which will be used in Tehran's research reactor during a ceremony to mark the Fourth National Anniversary of Nuclear Technology, in Tehran April 9, 2010. Iran announced Friday it had developed faster centrifuges for uranium enrichment, signalling determination to press on with its nuclear work despite possible new U.N. sanctions sought by U.S. President Barack Obama. REUTERS/Morteza Nikoubazl (IRAN - Tags: ANNIVERSARY POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Objects representing nuclear fuel which will be used in Tehran's research reactor (L) and a sample of 3rd generation of centrifuges for uranium enrichment are unveiled during a ceremony to mark the Fourth National Anniversary of Nuclear Technology, in Tehran April 9, 2010. Iran announced Friday it had developed faster centrifuges for uranium enrichment, signalling determination to press on with its nuclear work despite possible new U.N. sanctions sought by U.S. President Barack Obama. REUTERS/Morteza Nikoubazl (IRAN - Tags: ANNIVERSARY POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton (L) and Russia's Foreign Minister Sergei Lavrov leave after a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Hillary Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton (L) and Russia's Foreign Minister Sergei Lavrov attend a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Hillary Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton (L) and Russia's Foreign Minister Sergei Lavrov attend a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton (L) and Russia's Foreign Minister Sergei Lavrov attend a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Hillary Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton, together with Russia's Foreign Minister Sergei Lavrov (not pictured), attends a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Hillary Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton, together with Russia's Foreign Minister Sergei Lavrov (not pictured), attends a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Hillary Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

U.S. Secretary of State Hillary Clinton (L) and Russia's Foreign Minister Sergei Lavrov attend a news conference in Moscow March 18, 2010. Russia said on Thursday it would start up the reactor it is building at Iran's first atomic power plant in mid-2010, prompting immediate criticism from visiting U.S. Secretary of State Hillary Clinton. REUTERS/Alexander Natruskin (RUSSIA - Tags: POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Foreign Ministry spokesman Ramin Mehmanparast looks on during his first weekly news conference in Tehran November 24, 2009. Iran is not opposed to sending its low-enriched uranium (LEU) abroad but wants 100 percent guarantees of receiving higher-enriched fuel in return for a medical research reactor, the Foreign Ministry said on Tuesday. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Foreign Ministry spokesman Ramin Mehmanparast speaks during his first weekly news conference in Tehran November 24, 2009. Iran is not opposed to sending its low-enriched uranium (LEU) abroad but wants 100 percent guarantees of receiving higher-enriched fuel in return for a medical research reactor, the Foreign Ministry said on Tuesday. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Foreign Ministry spokesman Ramin Mehmanparast looks on during his first weekly news conference in Tehran November 24, 2009. Iran is not opposed to sending its low-enriched uranium (LEU) abroad but wants 100 percent guarantees of receiving higher-enriched fuel in return for a medical research reactor, the Foreign Ministry said on Tuesday. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

Foreign Ministry spokesman Ramin Mehmanparast speaks during his first weekly news conference in Tehran November 24, 2009. Iran is not opposed to sending its low-enriched uranium (LEU) abroad but wants 100 percent guarantees of receiving higher-enriched fuel in return for a medical research reactor, the Foreign Ministry said on Tuesday. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

Iran's Foreign Ministry spokesman Hassan Qashqavi pauses during his weekly news conference in Tehran August 24, 2009. Iran will continue to cooperate with the U.N. nuclear watchdog, the Foreign Ministry said on Monday, appearing to confirm Tehran had let inspectors access a reactor under construction after blocking visits for a year. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

Iran's Foreign Ministry spokesman Hassan Qashqavi speaks to journalists during his weekly news conference in Tehran August 24, 2009. Iran will continue to cooperate with the U.N. nuclear watchdog, the Foreign Ministry said on Monday, appearing to confirm Tehran had let inspectors access a reactor under construction after blocking visits for a year. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

Iran's Foreign Ministry spokesman Hassan Qashqavi speaks with journalists during his weekly news conference in Tehran August 24, 2009. Iran will continue to cooperate with the U.N. nuclear watchdog, the Foreign Ministry said on Monday, appearing to confirm Tehran had let inspectors access a reactor under construction after blocking visits for a year. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

Iran's Foreign Ministry spokesman Hassan Qashqavi speaks with journalists during his weekly news conference in Tehran August 24, 2009. Iran will continue to cooperate with the U.N. nuclear watchdog, the Foreign Ministry said on Monday, appearing to confirm Tehran had let inspectors access a reactor under construction after blocking visits for a year. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

Iran's Foreign Ministry spokesman Hassan Qashqavi speaks with journalists during his weekly news conference in Tehran August 24, 2009. Iran will continue to cooperate with the U.N. nuclear watchdog, the Foreign Ministry said on Monday, appearing to confirm Tehran had let inspectors access a reactor under construction after blocking visits for a year. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

Iran's Foreign Ministry spokesman Hassan Qashqavi speaks with journalists during his weekly news conference in Tehran August 24, 2009. Iran will continue to cooperate with the U.N. nuclear watchdog, the Foreign Ministry said on Monday, appearing to confirm Tehran had let inspectors access a reactor under construction after blocking visits for a year. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY) 

A general view shows the reactor at the nuclear power plant in Bushehr, 1200 kilometers (746 miles) south of Tehran February 25, 2009. Iran said on Wednesday it had carried out successful tests at its Russian-built Bushehr nuclear power plant in a step towards its launch. REUTERS/Caren Firouz (IRAN) 

A security official keeps an eye on journalists as they take images of the reactor during a tour of the nuclear power plant in Bushehr, 1200 kilometers (746 miles) south of Tehran February 25, 2009. Iran said on Wednesday it had carried out successful tests at its Russian-built Bushehr nuclear power plant in a step towards its launch. REUTERS/Caren Firouz (IRAN) 

Workers stand on a balcony of the reactor dome of the nuclear power plant in Bushehr, 1200 km (746 miles) south of Tehran February 25, 2009. REUTERS/Caren Firouz (IRAN) 

Ali Asghar Soltanieh, Iran's International Atomic Energy Agency (IAEA) Ambassador, waits for the start of a board of governors meeting in Vienna June 2, 2008. A U.N. nuclear watchdog team will visit Syria on June 22-24 to advance an investigation into U.S. intelligence alleging that Damascus secretly built an atomic reactor, the agency's chief said on Monday. REUTERS/Leonhard Foeger (AUSTRIA) 

Ali Asghar Soltanieh, Iran's International Atomic Energy Agency (IAEA) Ambassador, waits for the start of a board of governors meeting in Vienna June 2, 2008. A U.N. nuclear watchdog team will visit Syria on June 22-24 to advance an investigation into U.S. intelligence alleging that Damascus secretly built an atomic reactor, the agency's chief said on Monday. REUTERS/Leonhard Foeger (AUSTRIA) 

International Atomic Energy Agency (IAEA) chief weapons inspector Olli Heinonen attends a board of governors meeting at Vienna's U.N. headquarters November 23, 2006. The U.N. nuclear watchdogs 35-nation board of governors indefinitely blocked Irans bid for technical aid for a reactor project given fears it could be secretly used to yield bomb-grade plutonium. REUTERS/Leonhard Foeger (AUSTRIA) 

U.S. ambassador to the International Atomic Energy Agency (IAEA) Gregory Schulte attends a board of governors meeting at Vienna's U.N. headquarters November 23, 2006. The U.N. nuclear watchdogs 35-nation board of governors indefinitely blocked Irans bid for technical aid for a reactor project given fears it could be secretly used to yield bomb-grade plutonium. REUTERS/Leonhard Foeger (AUSTRIA) 

International Atomic Energy Agency (IAEA) chief weapons inspector Olli Heinonen (L) talks to IAEA Director General Mohammed ElBaradei at the beginning of a board of governors meeting at Vienna's U.N. headquarters November 23, 2006. The U.N. nuclear watchdogs 35-nation board of governors indefinitely blocked Irans bid for technical aid for a reactor project given fears it could be secretly used to yield bomb-grade plutonium. REUTERS/Leonhard Foeger (AUSTRIA) 

Iran's ambassador to the International Atomic Energy Agency (IAEA) Ali Asghar Soltanieh (L) and the head of the U.N. nuclear watchdog IAEA Director General Mohammed ElBaradei (R) attend a board of governors meeting at Vienna's U.N. headquarters November 23, 2006. The U.N. nuclear watchdogs 35-nation board of governors indefinitely blocked Irans bid for technical aid for a reactor project given fears it could be secretly used to yield bomb-grade plutonium. REUTERS/Leonhard Foeger (AUSTRIA) 

International Atomic Energy Agency (IAEA) Director General Mohammed ElBaradei attends a board of governors meeting at Vienna's U.N. headquarters November 23, 2006. The U.N. nuclear watchdogs 35-nation board of governors indefinitely blocked Irans bid for technical aid for a reactor project given fears it could be secretly used to yield bomb-grade plutonium. REUTERS/Leonhard Foeger (AUSTRIA) 

Iran's ambassador to the International Atomic Energy Agency (IAEA) Ali Asghar Soltanieh (L) talks to the head of the U.N. nuclear watchdog IAEA Director General Mohammed ElBaradei (R) at the beginning of a board of governors meeting at Vienna's U.N. headquarters November 23, 2006. The U.N. nuclear watchdogs 35-nation board of governors indefinitely blocked Irans bid for technical aid for a reactor project given fears it could be secretly used to yield bomb-grade plutonium. REUTERS/Leonhard Foeger (AUSTRIA) 

Alexander Glukhov, First Vice President of Atomstroiexport, the company overseeing construction at Iran's nuclear reactor in Bushehr, speaks during a news conference in Moscow October 26, 2006. Construction at Bushehr was well advanced, with the reactor likely to go on stream in the summer of 2008, Glukhov told a news conference on Thursday. He also discounted any use of the plant to build nuclear weapons. REUTERS/Anton Denisov (RUSSIA) 

Iranian President Mahmoud Ahmadinejad speaks during the opening ceremony of the Arak heavy-water project 190 km (120 miles) southwest of Tehran August 26, 2006. Iran's president launched a new phase in the Arak heavy-water reactor project on Saturday, despite Western fears it is aimed at producing a bomb.
REUTERS/ISNA/Handout (IRAN) 

A view of the Arak heavy-water project 190 km (120 miles) southwest of Tehran August 26, 2006. Iran President Mahmoud Ahmadinejad launched a new phase in the Arak heavy-water reactor project on Saturday, despite Western fears it is aimed at producing a bomb. REUTERS/ISNA/Handout (IRAN) 

Iranian President Mahmoud Ahmadinejad (2nd L) inaugurates the Arak heavy-water project 190 km (120 miles) southwest of Tehran August 26, 2006. Iran's president launched a new phase in the Arak heavy-water reactor project on Saturday, despite Western fears it is aimed at producing a bomb. REUTERS/ISNA/Handout (IRAN) 

Iranian President Mahmoud Ahmadinejad (C) attends the inauguration of the Arak heavy-water project 190 km (120 miles) southwest of Tehran August 26, 2006. Iran's president launched a new phase in the Arak heavy-water reactor project on Saturday, despite Western fears it is aimed at producing a bomb. REUTERS/ISNA/Handout (IRAN) 

Iranian President Mahmoud Ahmadinejad (C) inaugurates the Arak heavy-water project 190 km (120 miles) southwest of Tehran August 26, 2006. Iran's president launched a new phase in the Arak heavy-water reactor project on Saturday, despite Western fears it is aimed at producing a bomb. REUTERS/ISNA/Handout (IRAN) 

A view of the Arak heavy-water project 190 km (120 miles) southwest of Tehran August 26, 2006. Iran President Mahmoud Ahmadinejad launched a new phase in the Arak heavy-water reactor project on Saturday, despite Western fears it is aimed at producing a bomb. REUTERS/ISNA/Handout (IRAN) 

General view of the nuclear plant in the southwestern Iranian city of Bushehr June 22, 2005. Russian fuel for Iran's first nuclear power reactor, part of a programme Washington fears may be used to make bombs, will be delivered within months, a senior Iranian atomic official said on Wednesday. Russian welders and other workers working on the electricity turbine area and reactor building, which will be sealed off and operated automatically once fuel is introduced. 

Workers work at the nuclear plant in the southwestern Iranian city of Bushehr June 22, 2005. Russian fuel for Iran's first nuclear power reactor, part of a programme Washington fears may be used to make bombs, will be delivered within months, a senior Iranian atomic official said on Wednesday. Russian welders and other workers working on the electricity turbine area and reactor building, which will be sealed off and operated automatically once fuel is introduced.