The Myth of Zero Enrichment

As a fragile cease-fire holds between the United States and Iran, negotiators remain deadlocked over the future of Tehran’s nuclear program. Both sides entered the talks convinced that they had prevailed in what Iranians now call the “third imposed war,” reducing incentives for compromise and reinforcing maximalist positions. All the while, the issue that has shaped U.S.-Iran relations for more than two decades—uranium enrichment on Iranian soil—remains intractable.

Operation Epic Fury, as the United States calls it, has not fundamentally altered Iran’s nuclear calculus. If anything, it has reinforced Tehran’s determination to preserve what it views as both a strategic asset and a symbol of its national sovereignty. This reality carries an uncomfortable implication for Washington: Demands for “zero enrichment” remain as unrealistic today as they were before the war. In fact, arguably they are more so, in that the war has reinforced Tehran’s negotiating baseline. Any future agreement will therefore have to focus not on the complete dismantlement of Iran’s enrichment capacity but on rigorously monitoring its nuclear program, enhancing transparency, and preventing weaponization. The nuclear standoff has occupied the minds of eight U.S. But in the past two decades, the more consequential question has been domestic enrichment capacity in Iran—an issue that had already been resolved under the Joint Comprehensive Plan of Action (JCPOA), or the Iran nuclear deal. Since mastering uranium enrichment technology in 1999, Iranians have long insisted on retaining enrichment capacity citing their Nuclear Nonproliferation Treaty (NPT) rights— an argument that the United States rejects . As Iran’s program expanded, however, opposition to enrichment became increasingly impractical. It could not be reversed or wished away. European officials tried to urge U.S. negotiators to accept enrichment as a reality, but they were reluctant to do so.

Key points

• Operation Epic Fury, as the United States calls it, has not fundamentally altered Iran’s nuclear calculus.
• If anything, it has reinforced Tehran’s determination to preserve what it views as both a strategic asset and a symbol of its national sovereignty.
• This reality carries an uncomfortable implication for Washington: Demands for “zero enrichment” remain as unrealistic today as they were before the war.
• In fact, arguably they are more so, in that the war has reinforced Tehran’s negotiating baseline.
• Any future agreement will therefore have to focus not on the complete dismantlement of Iran’s enrichment capacity but on rigorously monitoring its nuclear program, enhancing transparency, and preve…