(Reuters) – A U.S. decision to terminate sanctions waivers that have allowed foreign companies to do some work at Iranian nuclear sites will not affect Iran’s nuclear programme, Iran’s Atomic Energy Organisation (AEOI) said on Thursday.

The United States said on Wednesday it will terminate the waivers, which had allowed Russian, Chinese and European companies to carry out work at Iranian nuclear sites.

The role of the foreign firms was agreed in Iran’s nuclear deal with world powers in 2015, and was intended to help ensure Iran’s nuclear programme would not be used to make weapons.

“The ending of waivers for nuclear cooperation under (the nuclear deal) will not in practice have any effect on Iran’s work,” AEOI spokesman Behrouz Kamalvandi said, in remarks reported by ISNA news agency. “Of course America wants its actions to have an effect in line with pressure on Iran, but in practice nothing will happen.”

Under the 2015 nuclear agreement, Iran agreed to curbs on its nuclear program in exchange for sanctions relief. U.S. President Donald Trump withdrew from the deal in 2018 and has since reimposed sanctions. Iran has scaled back its commitments under the deal but says it still abides by its overall terms.

The waivers, which officials said expire on July 27, covered the conversion of Iran’s Arak heavy water research reactor, the provision of enriched uranium for its Tehran Research Reactor and the transfer of spent and scrap reactor fuel abroad.

Iran agreed to shut down the reactor at Arak – about 250 km southwest of Tehran – under the 2015 deal. Iran was allowed to produce a limited amount of heavy water and Tehran has been working on redesigning the reactor. Tehran says it will make isotopes for medical and agricultural use.

Work on redesigning the Arak reactor is continuing, albeit at a slow pace because of sanctions and problems with carrying out the nuclear deal, Kamalvandi said.

(Reporting by Babak Dehghanpisheh; Editing by Peter Graff)

Copyright 2020 Thomson Reuters.