Iran’s Enriched Uranium Stockpile Remains Key Impasse in US Nuclear Talks
The status of Iran’s enriched uranium stockpile has emerged as the central sticking point in negotiations with the United States, with both sides maintaining fundamentally incompatible positions as a temporary ceasefire nears its end.
Iran currently holds substantial quantities of fissile material, including over 400 kilograms of uranium enriched to 60% purity and nearly 300 kilograms at 20% enrichment, according to the International Atomic Energy Agency’s May 2025 assessment. The country also possesses approximately 5.5 tons of uranium enriched to 5% and 2.2 tons at 2% purity. While 60% enrichment falls short of weapons-grade material, experts note it could be further enriched to weapons levels within days using appropriate equipment.
The exact location and condition of Iran’s stockpile remain uncertain. The IAEA has acknowledged losing “continuity of knowledge” about the materials since Tehran disabled monitoring cameras at nuclear facilities in June 2022. Satellite imagery analyzed by experts suggests Iran may have relocated highly enriched uranium to the Isfahan underground facility shortly before US airstrikes in June 2025, though Pentagon officials maintain there is no intelligence confirming such movement.
US President Donald Trump has demanded Tehran surrender all highly enriched uranium and dismantle its nuclear infrastructure permanently. During recent talks in Islamabad, US Vice President J.D. Vance reportedly proposed a 20-year moratorium on Iran’s nuclear program, though Trump subsequently dismissed this timeframe as insufficient. Iranian officials have consistently rejected abandoning their nuclear program, offering instead to dilute their stockpile and accept a five-year enrichment moratorium.
Iranian Foreign Ministry spokesman Esmaeil Baqaei emphasized Monday that transferring enriched uranium abroad “has never been raised as an option for us in negotiations,” framing the country’s nuclear achievements as matters of national pride.
Russia has proposed hosting Iran’s enriched uranium as a potential compromise, citing its experience removing 11 tons of low-enriched uranium from Iran under the 2015 Joint Comprehensive Plan of Action. Kremlin spokesman Dmitry Peskov stated that while Tehran had initially been receptive to the proposal, Washington firmly rejected it. Russian state nuclear corporation Rosatom head Aleksey Likhachev confirmed the company remains ready to assist with uranium removal, noting Russia’s unique experience in managing Iran’s nuclear materials.
With positions remaining entrenched and the ceasefire deadline approaching, the fate of Iran’s uranium stockpile continues to represent the most significant obstacle to reaching a comprehensive agreement between Tehran and Washington.
