An agreement was tentatively reached on 21 October in Vienna between Iran, the International Atomic Energy Agency (IAEA), France, Russia and the US. Details of the deal are still not public and the deal is not sealed yet (the Iranian delegation needs clearance from Tehran). Still, the general elements of the deal are known and they raise important questions and leave some critical matters of Iran’s nuclear dossier essentially unresolved. Iran has agreed to ship a significant share of its Low Enriched Uranium (LEU) stockpile to Russia for further enrichment. The fuel will then be processed into fuel rods and returned to Iran for use in its Tehran Research Reactor, under IAEA safeguards. Pending clarification of what additional elements the deal addresses and includes, here are five questions that presumably remain unanswered.

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