What Does the IAEA Know About Iran’s Stockpile of Highly Enriched Uranium?

This documentary segment features an interview with Rafael Grossi, the Director General of the International Atomic Energy Agency (IAEA), conducted on March 18, 2026. The discussion focuses on the IAEA’s knowledge regarding Iran’s inventory of highly enriched uranium and the broader implications for nuclear non-proliferation. Grossi’s insights are presented within the context of his role as the head of the United Nations’ nuclear watchdog since 2019, following a career in nuclear safety and diplomacy.

The interview serves as an update to the 2026 documentary, “Strike on Iran: The Nuclear Question,” and is part of FRONTLINE’s Transparency Project, which aims to provide access to the source material behind its productions. The segment explores the technical and political dimensions of Iran’s nuclear activities and the international community’s efforts to monitor and regulate them.

Key Themes & Topics Examined

• The International Atomic Energy Agency’s role in monitoring global nuclear activities.
• Iran’s nuclear program and its stockpile of highly enriched uranium.
• The challenges and complexities of nuclear non-proliferation efforts.
• The diplomatic career and expertise of IAEA Director General Rafael Grossi.
• The ongoing international concerns surrounding Iran’s nuclear capabilities.

Archival & Investigative Sources

• Interview with Rafael Grossi, Director General of the IAEA.
• FRONTLINE’s ongoing journalistic investigations into nuclear proliferation.
• Source material from the documentary “Strike on Iran: The Nuclear Question.”

Frequently Asked Questions

What is the primary function of the IAEA?

The International Atomic Energy Agency (IAEA) is an international organization that seeks to promote the peaceful use of nuclear energy and to inhibit its use for any military purpose, including nuclear weapons. It serves as the world’s center for cooperation in the nuclear field.

Who is Rafael Grossi?

Rafael Grossi is an Argentine diplomat who has served as the Director General of the International Atomic Energy Agency (IAEA) since 2019. His career has focused on nuclear safety, security, and non-proliferation, including previous roles as Argentina’s ambassador to Austria and its representative to the IAEA.

What is highly enriched uranium?

Highly enriched uranium (HEU) is a type of uranium in which the percentage of uranium-235 (the fissile isotope) has been increased through isotope separation. It is a critical component for nuclear weapons and can also be used as fuel in certain types of nuclear reactors.