Iran is reducing its most proliferation-prone nuclear stockpile as required by its landmark deal with world powers but much work remains to be done to resolve all concerns about Tehran's activities, the UN atomic watchdog chief said on Monday.
Among measures Iran is taking since the interim agreement took effect on Jan. 20 is the dilution of its stock of higher-enriched uranium to a fissile concentration less suitable for any attempt to fuel an atomic bomb.
Yukiya Amano, director general of the International Atomic Energy Agency (IAEA), indicated that Iran had made sufficient progress in this regard to receive a scheduled March 1 installment of $450 million out of a total of $4.2 billion in previously blocked overseas funds.
The IAEA has a pivotal role in checking that Iran is living up to its part of the six-month accord in curbing its disputed nuclear program in exchange for some easing of sanctions that have impaired its oil-dependent economy.
"As of today, measures agreed under the Joint Plan of Action are being implemented as planned," Amano said, referring to the Nov. 24 agreement struck in Geneva between Iran and the United States, Germany, France, Russia, China and Britain.
These included "the dilution of a proportion of Iran's inventory" of 20 percent uranium gas to a lower enrichment level, which "has reached the halfway mark", he told the IAEA's 35-nation board, according to a copy of his speech.
Under the accord, Iran suspended enrichment of uranium to 20 percent fissile concentration - a relatively short technical step away from the level required for nuclear bombs - and is taking action to neutralize its holding of the material.
In return, Iran is gradually winning access to $4.2 billion of its oil revenues frozen abroad and some other sanctions relief. The funds will be paid out in eight transfers on a schedule that started with a $550 million payment by Japan on Feb. 1.
Last month, banking sources said South Korea was set to make two payments in March totaling $1 billion.
The March 1 installment depended on Iran following a schedule for diluting part of its stockpile, which Amano's comment suggested it now had. But it was not immediately clear if the funds had already been transferred to Iran.
The Geneva deal was designed to buy time for negotiations on a final settlement of the decade-old stand-off over nuclear activity that Iran says is peaceful but the West fears may be latently aimed at developing a nuclear bomb capability.
Those talks began in Vienna last month and are due to resume on March 17, also in the Austrian capital. The goal is to hammer out a long-term agreement by late July, though the deadline can be extended by six months if both sides agree.
Expert-level talks between the sides are to be held in Vienna on March 5-7, Iran's official IRNA news agency said.
Separately, the IAEA is investigating suspicions - largely believed to be based on intelligence provided by Western states and Israel - that Iran has researched how to construct an atomic bomb, a charge Tehran denies. Iran says it is Israel's assumed nuclear arsenal that threatens Middle East peace.
Amano made clear his determination that those allegations - alleged experimentation and tests to develop the expertise needed to turn fissile material into a functioning atomic bomb - must be cleared up.
"The measures implemented by Iran, and the further commitments it has undertaken, represent a positive step forward, but much remains to be done to resolve all outstanding issues," the veteran Japanese diplomat said.
He said clarification of all issues related to the possible military dimensions to Iran's nuclear program is "essential."
Amano said 17 IAEA member states had so far expressed interest in contributing extra-budgetary funds to help finance the IAEA's extra workload in monitoring the implementation of the Geneva agreement in Iran, but that more was needed. "We are still short of some $2.21 million," Amano said.
The UN agency said in January it needed about 5.5 million euros from member states to pay for its increased activities in Iran. This would cover more inspectors sent to Iran and the purchase of specialized surveillance-related equipment.
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