What Happened
- The International Atomic Energy Agency (IAEA) stated in its February 2026 report that it cannot verify whether Iran has suspended all uranium enrichment activities as agreed.
- For the first time, the IAEA revealed that uranium enriched to up to 60% purity — close to weapons-grade (90%) — has been stored in an underground tunnel complex at Iran's Isfahan nuclear facility.
- The IAEA estimated Iran held 440.9 kilograms of uranium enriched to 60% before Israeli-US strikes in 2025 — sufficient, if further enriched, for approximately 10 nuclear weapons.
- The agency called on Iran to allow verification activities "without further delay," calling the Isfahan storage situation a "matter of proliferation concern."
- The report notes regular vehicular activity detected by satellite imagery around the entrance to the Isfahan tunnel complex, raising additional concerns about possible covert activities.
Static Topic Bridges
Nuclear Non-Proliferation Treaty (NPT) and IAEA Safeguards
The Treaty on the Non-Proliferation of Nuclear Weapons (NPT), signed in 1968 and entered into force in 1970, is the cornerstone of global nuclear non-proliferation efforts. It divides states into five Nuclear Weapon States (NWS: USA, Russia, UK, France, China) and Non-Nuclear Weapon States (NNWS). Iran is a NNWS party to the NPT and is legally bound to not develop nuclear weapons. Under Article III of the NPT, NNWS must conclude Comprehensive Safeguards Agreements (CSA) with the IAEA, allowing inspectors to verify that nuclear material is not diverted from peaceful uses. An Additional Protocol (AP) strengthens inspections by requiring states to declare a broader range of nuclear activities and providing inspectors access to more sites.
- NPT parties: 191 states (as of 2025); near-universal membership
- Five NWS under NPT: USA, Russia, UK, France, China
- Non-signatories: India, Pakistan, Israel (never signed); North Korea withdrew in 2003
- Iran's NPT status: NNWS party; subject to full-scope IAEA safeguards
- Additional Protocol: approved by IAEA Board of Governors May 1997; strengthens access and reporting requirements
Connection to this news: Iran's concealment of highly enriched uranium in an underground facility and refusal to allow IAEA verification represents a direct violation of its NPT and Comprehensive Safeguards Agreement obligations, raising the spectre of covert weaponisation efforts.
Uranium Enrichment: The Technical Pathway to Nuclear Weapons
Natural uranium contains approximately 0.7% of the fissile isotope Uranium-235 (U-235). Enrichment increases the proportion of U-235 through isotope separation, typically via gas centrifuges. Low-enriched uranium (LEU, up to 5% U-235) is used in civilian nuclear power reactors. Highly enriched uranium (HEU, above 20%) has both civilian research and weapons-related applications. Weapons-grade uranium requires enrichment to approximately 90% U-235. The jump from 60% (Iran's current level) to 90% (weapons-grade) is technically achievable in a relatively short "breakout time," estimated at weeks to months depending on available centrifuge capacity. The IAEA's discovery of 440.9 kg of 60%-enriched uranium is significant because this material could be further enriched to weapons grade.
- Natural uranium: ~0.7% U-235
- LEU (reactor grade): 3-5% U-235
- HEU threshold: above 20% U-235
- Weapons-grade: ~90% U-235
- 60% enriched uranium → 90% weapons-grade: a short technical step; represents an imminent proliferation risk
- Critical mass for a uranium bomb: approximately 50 kg of weapons-grade uranium (depending on design)
Connection to this news: With 440.9 kg of 60%-enriched uranium, Iran technically possesses enough material — if further enriched — for approximately 10 nuclear weapons. This positions Iran at the very edge of the nuclear weapons threshold, making IAEA verification access critical.
The JCPOA (Iran Nuclear Deal) and Its Collapse
The Joint Comprehensive Plan of Action (JCPOA) was signed in July 2015 between Iran and the P5+1 (USA, Russia, China, UK, France, Germany). Under the JCPOA, Iran agreed to cap uranium enrichment at 3.67%, reduce its stockpile, and allow intrusive IAEA inspections in exchange for sanctions relief. The USA withdrew from the JCPOA in May 2018 under President Trump's "maximum pressure" policy. Iran subsequently began exceeding JCPOA limits incrementally, enriching to 20%, then 60%. US-Iran nuclear negotiations have continued intermittently, but no successor agreement has been reached. Iranian nuclear activities have expanded dramatically since the JCPOA's effective collapse.
- JCPOA signed: July 14, 2015 (Vienna)
- US withdrawal: May 8, 2018 (under President Trump)
- Iran's response: began exceeding enrichment limits; centrifuge expansion; 60% enrichment started 2021
- P5+1 composition: USA, Russia, China, UK, France (P5) + Germany (+1)
- JCPOA enrichment cap: 3.67% U-235; stockpile cap: 300 kg LEU
Connection to this news: The JCPOA's collapse is the direct antecedent of the current situation — with no arms-control framework in place, Iran has been enriching to 60% without effective constraint, and the IAEA now finds itself unable to verify even a claimed suspension of enrichment activities.
India's Position on Nuclear Non-Proliferation and Iran
India is not a signatory to the NPT but is a member of the IAEA and participates in nuclear governance discussions. India's general position supports nuclear non-proliferation globally while asserting the right of states to peaceful uses of nuclear energy. India has historically maintained pragmatic ties with Iran — including the Chabahar Port project, energy imports, and connectivity to Central Asia via the International North-South Transport Corridor (INSTC). India has opposed unilateral sanctions on Iran that bypass the UN Security Council, while officially supporting Iran's compliance with its international obligations.
- India-Iran: Chabahar Port is a strategic connectivity asset for India (access to Afghanistan and Central Asia)
- INSTC: India-Iran-Russia corridor; 7,200 km multi-modal route connecting Mumbai to Moscow via Tehran
- India's NPT status: non-signatory; nuclear-armed state; has a Comprehensive Safeguards Agreement with IAEA only for civilian facilities
- India's concern: Iranian instability affects energy security and connectivity investments
Connection to this news: The IAEA's inability to verify Iran's enrichment suspension — and the discovery of near-weapons-grade material stored underground — heightens regional tensions in a geography where India has significant strategic and economic interests.
Key Facts & Data
- Iran's uranium enrichment level: up to 60% purity (weapons-grade is ~90%)
- Estimated Iranian stockpile of 60%-enriched uranium before 2025 Israeli-US strikes: 440.9 kg — enough for ~10 nuclear weapons if further enriched
- Storage location: underground tunnel complex, Isfahan nuclear facility
- IAEA: International Atomic Energy Agency; established 1957; Vienna headquarters; 176 member states
- NPT entered into force: 1970; 191 states parties (as of 2025)
- JCPOA signed: July 2015; US withdrew May 2018; Iran began exceeding enrichment limits subsequently
- Critical mass of weapons-grade uranium for a bomb: approximately 50 kg (varies by design)
- IAEA called Isfahan storage a "matter of proliferation concern"; demanded verification access "without further delay"