Iran Nuclear Status — Enrichment & Breakout Timeline
Iran's nuclear program has been significantly impacted by Operation Epic Fury strikes but not eliminated. As of March 29, 2026, Iran holds 440.9kg of 60%-enriched uranium (per IAEA DG Grossi), enough for approximately 10 weapons if further enriched to 90% weapon-grade. Iran was not actively enriching as of February 25 per Secretary Rubio and IAEA. Post-strike breakout is estimated at 12 weeks under the most likely scenario.
Nuclear Facility Damage Assessment
| Facility | Type | Depth | Damage | Post-Strike Status |
|---|---|---|---|---|
| Natanz FEP | Enrichment (main) | 8m underground | 75% | Severely damaged |
| Natanz R&D | Advanced centrifuge R&D | Surface | 95% | Destroyed |
| Fordow (FFEP) | Enrichment (hardened) | 80m underground | 30% | Partially damaged |
| Isfahan UCF | Uranium conversion | Surface | 90% | Destroyed |
| Arak IR-40 | Heavy water reactor | Surface | 60% | Heavily damaged |
| Parchin | Weaponization R&D | Tunnels | 50% | Damaged |
| Saghand Mine | Uranium mining | N/A | Not struck | Intact |
| Suspected covert site | Unknown | Unknown | Not struck | Unknown |
Breakout Timeline Estimates
| Scenario | Time | Confidence | Detail |
|---|---|---|---|
| Pre-strike baseline | 2 weeks | HIGH | Before Feb 27 strikes — Iran was ~2 weeks from enough HEU for one device at 60% starting purity |
| Post-strike (current) | 12 weeks | MEDIUM | Natanz/Isfahan damage sets back centrifuge cascade. Stockpile partially destroyed. 12 weeks to reconstitute |
| Full reconstitution | 26 weeks | LOW | Rebuild all damaged cascades + produce new HEU from scratch. Requires covert facility or Fordow expansion |
| Covert surge (Fordow) | 3 weeks | MEDIUM | If Fordow's deep bunker cascades survived intact (only 30% damaged), parallel enrichment could compress timeline |
IAEA Access Status
Iran terminated all IAEA access on February 28, 2026. Surveillance cameras have been disabled and seals removed from all declared facilities. The IAEA is unable to verify the extent of strike damage, the status of enriched material stockpiles, or whether covert enrichment activities continue. This is the most significant IAEA verification blackout since the agency began monitoring Iran's nuclear program.
Key Nuclear Assessments
- Natanz FEP: Main enrichment plant severely damaged (75%). 6,000+ IR-1 centrifuges destroyed. Above-ground halls collapsed.
- Fordow FFEP: Deep mountain bunker only 30% damaged. GBU-57 MOPs caused tunnel collapses but core facility may be intact. This is the greatest proliferation risk.
- Stockpile status: ~2,600kg of enriched uranium destroyed in strikes. 440.9kg at 60% — survival status uncertain with IAEA access denied.
- Weapon-grade threshold: 42kg of 90%-enriched HEU needed for one device. Iran's 440.9kg at 60% could produce enough for ~10 weapons if further enriched.
Frequently Asked Questions
How close is Iran to a nuclear weapon?
Post-strike estimate is 12 weeks to produce enough weapon-grade HEU for one device (medium confidence). Iran holds 440.9kg at 60% enrichment. The weapon-grade threshold is 90% enrichment with 42kg needed per device. IAEA access is fully denied, creating significant uncertainty.
What happened to Iran's nuclear facilities?
Natanz main enrichment plant: 75% damaged, 6,000+ centrifuges destroyed. Natanz R&D: 95% destroyed. Fordow deep bunker: only 30% damaged — core facility may be intact. Isfahan conversion: 90% destroyed. Arak reactor: 60% damaged. Parchin: 50% damaged.
Can the IAEA monitor Iran's nuclear program?
No. Iran terminated all IAEA access on February 28, 2026. Cameras disabled, seals removed. The IAEA cannot verify strike damage, stockpile status, or covert enrichment. This is the most significant verification blackout in IAEA-Iran history.
How much enriched uranium does Iran have?
440.9kg at 60% enrichment per IAEA DG Grossi (Feb 27 report). Total stockpile was approximately 5,800kg at various enrichment levels pre-strike, reduced to ~3,200kg post-strike with ~2,600kg destroyed.
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