Iran Fortifies Uranium Stock in Underground Tunnels, Complicating Diplomacy

Iran is employing a drastic defensive strategy to safeguard its highly enriched uranium reserves, reportedly collapsing tunnels and mining access routes to its underground facilities. This move aims to render the material virtually inaccessible, creating a significant obstacle for both ongoing nuclear negotiations and any potential military intervention.

According to U.S. intelligence sources cited by CNN, Tehran has intensified efforts to "seal its stock of uranium close to the military threshold." This involves deliberately causing tunnel collapses and booby-trapping access points with explosives. The result is that accessing this strategic material is now "much more difficult, dangerous, and longer" than it was just a month ago, particularly after former President Donald Trump hinted at the possibility of seizing the material.

Satellite imagery supports these claims. Photos released by the U.S. Institute for Science and International Security (ISIS) show that Iran has completely blocked the three entrances to its Isfahan nuclear complex with earth. The central and southern entrances are now "unrecognizable and entirely covered with soil," while the northern entrance, already fortified, has also been filled in.

Experts estimate that the Isfahan underground tunnel complex may store at least 220 kg of Iran's declared stock of 60% enriched uranium, which is a technical step away from the 90% purity needed for nuclear weapons. The IAEA reports that Iran possesses a total of 440.9 kg of 60% enriched uranium.

This hardening of Iran's defensive posture is seen as a direct response to statements made by former President Trump. By publicly identifying the uranium as a potential target, Trump's remarks reportedly accelerated Tehran's actions to protect its resources. Trump's own public statements on the matter have been contradictory, at times suggesting the uranium would be returned to the U.S. "shortly," and at other times acknowledging the difficulty of retrieving it.