Iran has broken the seal of Isfahan Uranium Conversion Facility Monday, a top Iranian national security official informed IRNA. Chairman of the Publicity and Information Dissemination Committee of the Supreme National Security Council Ali Aqa-Mohammadi said the International Atomic Energy Agency (IAEA) inspectors have already arrived in Isfahan for the purpose.
In recent weeks, the Europeans and the United States warned that the resumption of the uranium conversion activities would prompt them to seek U.N. sanctions against Tehran.
The Iranian authorities have suspended work at the plant and its other nuclear facilities late last year to avoid U.N. sanctions and as a gesture in negotiations with the Europeans.
The facility in Isfahan converts raw uranium, known as yellowcake, into gas, the feedstock for enrichment. In the next phase of the process the gas is fed into centrifuges for enrichment. Uranium enriched to a low level is used to produce nuclear fuel and further enrichment makes it suitable for use in atomic bombs.
Meanwhile, Iran has officially informed the three major European countries (Britain, France and Germany) that their proposal on the country's nuclear program was unacceptable to Tehran, said an Iranian official on Monday.
Foreign Ministry spokesman Hamid-Reza Asefi conveyed Monday that Director-General of the Political and International Affairs Department at Foreign Ministry had officially informed ambassadors of the EU3 in Tehran that their proposal was not acceptable to Tehran.
Asefi said denial of Iran's right to uranium enrichment and possession of fuel cycle as well as production of fuel are among the most important reasons for Iran's rejection of the proposal.
According to IRNA, he said the European proposal had fallen short of making any reference to the "objective and solid" guarantees and this indicates contradiction between the proposal and the Paris Agreement.
Asefi said that the letter given to the Europeans stressed that Europe's proposal sought to set "discriminatory and baseless" standards.