FILE - In this file photo dated Sunday, Oct. 2, 2016, Iranian Foreign Minister Mohammad Javad Zarif answers questions from lawmakers in an open session of parliament in Tehran, Iran, explaining the nuclear deal with world powers.  Iran is to receive a huge shipment of natural uranium from Russia to compensate it for exporting tons of reactor coolant, according to unidentified Iranian diplomats Monday Jan. 9, 2017, in a move approved to keep Tehran committed to a landmark nuclear pact.  (AP Photo/Vahid Salemi, FILE)
FILE - In this file photo dated Sunday, Oct. 2, 2016, Iranian Foreign Minister Mohammad Javad Zarif answers questions from lawmakers in an open session of parliament in Tehran, Iran, explaining the nuclear deal with world powers. Iran is to receive a huge shipment of natural uranium from Russia to compensate it for exporting tons of reactor coolant, according to unidentified Iranian diplomats Monday Jan. 9, 2017, in a move approved to keep Tehran committed to a landmark nuclear pact. (AP Photo/Vahid Salemi, FILE) Credit: Vahid Salemi

Iran is to receive a huge shipment of natural uranium from Russia to compensate it for exporting tons of reactor coolant, diplomats say, in a move approved by the outgoing U.S. administration and other governments seeking to keep Tehran committed to a landmark nuclear pact.

Two senior diplomats said the transfer recently agreed on by the U.S. and five other world powers that negotiated the nuclear deal with Iran foresees delivery of 116 metric tons (nearly 130 tons) of natural uranium. U.N. Security Council approval is needed but a formality, considering five of those powers are permanent Security Council members, they said.

Uranium can be enriched to levels ranging from reactor fuel or medical and research purposes to the core of an atomic bomb. Iran has said it has no interest in such weapons, and its activities are being closely monitored under the nuclear pact to make sure they remain peaceful.

Tehran already got a similar amount of natural uranium in 2015 as part of negotiations leading up to the nuclear deal, in a swap for enriched uranium it sent to Russia. But the new shipment will be the first such consignment since the deal came into force a year ago.

The natural uranium agreement comes at a sensitive time. With the incoming U.S. administration and many U.S. lawmakers already skeptical of how effective the nuclear deal is in keeping Iran’s nuclear program peaceful over the long term, they might view it as further evidence that Tehran is being given too many concessions.