TEHRAN - Iran on Tuesday dismissed as "dreams" the idea that it might allow inspections of its military sites under the Islamic republic's nuclear deal with world powers.

"What has been said about inspections of our military sites, which are completely confidential and classified, is the mere expression of dreams," government spokesman Mohammad Bagher Nobakht said. "We will not accept anything outside our frameworks from the Americans - especially visits to military sites," he told a televised weekly press conference. Ali Akbar Velayati, supreme leader Ayatollah Ali Khamenei's foreign policy adviser, also dismissed "sloganeering by the new US administration for domestic consumption".

Iran "will never allow Americans or non-Americans to visit military sites which are a sensitive, important and strategic part of national security", Velayati told state television.

"The Americans should take the dream of visiting our military sites, using the pretext of the JCPOA (the nuclear deal) or any other pretext, to their graves."

The officials were reacting to media reports that Washington's UN envoy Nikki Haley last week discussed with International Atomic Energy Agency chief Yukiya Amano access to Iranian military sites under the framework of verification of the 2015 nuclear accord.

In its routine reports, the IAEA has said that Iran is in compliance with its landmark agreement with six major powers.

The landmark deal saw Iran curb its atomic activities and submit to closer IAEA inspections in order to make extremely difficult any attempt to make a nuclear weapon.

In exchange, nuclear-related sanctions against Iran were removed. Other punitive measures by the West, including those relating to Iran's missile programme, remained in place or have been boosted. Haley's trip to Vienna, where the IAEA is based, came amid growing concerns about the accord's future, with US President Donald Trump calling it the "worst" deal ever and threatening to tear it up. Tensions have risen between long-time foes Tehran and Washington since Trump entered the Oval Office, with each side accusing the other of not honouring the spirit of the nuclear accord.

President Hassan Rouhani has said that Iran could walk away from the deal within hours, accusing Washington of "constant and repetitive breaking of its promises" under the agreement.

Haley responded that new US sanctions against Iran relate to Iran's support for "worldwide terrorism" and other behaviour, and that Tehran cannot "use the nuclear deal to hold the world hostage".

In October, Trump is due to notify Congress about whether Iran is adhering to the deal.

Kazakhstan inaugurates IAEA-backed nuclear fuel bank

Kazakhstan inaugurated Tuesday a new internationally-controlled uranium fuel bank seen as potentially important in curbing nuclear proliferation and reducing regional security tensions.

The bank is capable of storing enough low-enriched uranium fuel to light up a large city for three years and it is hoped that access to the fuel will dissuade countries from launching their own nuclear enrichment programmes.

Iran's nuclear programme set off years of tensions across the region and with the West amid concerns it was looking to build an atomic bomb.

The bank "will function under the complete control of the International Atomic Energy Agency (IAEA)," which operates under the auspices of the United Nations, President Nursultan Nazarbayev said at the ceremony held in the capital Astana.

The new low-enriched uranium bank is located over 800 kilometres (500 miles) away in the northeastern town of Oskemen.

Having given up its own nuclear weapons following the collapse of the Soviet Union, Kazakhstan portrays itself as a key player in nuclear diplomacy. It is the world's top producer of raw uranium.

The Central Asian country hosted talks on Iran's nuclear programme in 2013.

The IAEA called the opening of the facility, which does not yet contain any fuel, a "key milestone" offering confidence to countries about the availability of nuclear power fuel.

Built at a cost of $150 million, the 880 square-metre (9,470 square-foot) structure will contain up to 90 tonnes of low-enriched uranium that is suitable to make fuel for a typical light-water reactor, or one that uses ordinary water.

A reserve of this size would be able to power a large city for three years, according to the IAEA.

Billionaire philanthropist Warren Buffet provided $50 million in start-up cash for the bank.