Bushehr's Cooling System Failed for 11 Minutes. Nobody Reported It.

Bushehr nuclear power plant: 1,000 MW, Russian-built (Atomstroyexport/Rosatom), operational since 2011, located 17 km from the Persian Gulf coast in southern Iran. The reactor was explicitly excluded from both the June 2025 and February 2026 strike packages. CENTCOM confirmed: Bushehr was not a target.

But strikes on Iranian infrastructure don't respect exclusion zones. In early March, a substation providing grid power to the Bushehr facility was damaged during broader strikes on Iranian electrical infrastructure. The reactor's cooling system lost external power for approximately 11 minutes before emergency diesel generators activated and restored cooling flow.

Eleven minutes. The timeline between "normal operations" and "core damage begins" in a pressurized water reactor without cooling is measured in hours, not minutes. Eleven minutes was well within safety margins. The backup generators performed as designed.

But eleven minutes with no grid power to a nuclear reactor in an active war zone is eleven minutes closer to a scenario that nobody has a plan for.

The IAEA issued warnings about the risk to Bushehr repeatedly since the war began. Director General Grossi called for both sides to avoid actions that could affect nuclear safety. The warnings went unanswered. Neither the US (which is striking infrastructure near the plant) nor Iran (which cannot protect its own grid) has a mechanism to guarantee Bushehr's safety during sustained military operations.

The Zaporizhzhia precedent in Ukraine demonstrated that nuclear facilities in war zones face risks their designers never contemplated: grid power loss, cooling water disruption, shelling of connected infrastructure, and the departure of trained operators. Zaporizhzhia has been in "cold shutdown" since September 2022 precisely because sustained military operations nearby made continued power generation too dangerous.

Bushehr is not in cold shutdown. It is operating. Generating 1,000 MW. With a war happening around it. The 11-minute power loss was a warning. The next one could last longer.

FAQ

Could Bushehr become another Chernobyl?

A Bushehr meltdown would not replicate Chernobyl's graphite fire (different reactor type: PWR vs RBMK). But a loss-of-coolant accident at Bushehr would release radioactive material into the Persian Gulf, contaminating desalination intake for Gulf states, fisheries, and coastal populations. The environmental and humanitarian consequences would be catastrophic and irreversible.

Why doesn't Iran shut down Bushehr?

Bushehr provides 1,000 MW to a grid that is losing capacity from war damage. Shutting it down removes power from millions of people during a crisis. The reactor's output is approximately 2% of Iran's total generation but is concentrated in the southern grid where demand is highest. Iran faces a choice between nuclear safety risk and civilian power supply.

Is the US legally obligated to avoid striking near Bushehr?

Under IHL, attacks that could cause widespread, long-term, and severe damage to the natural environment are prohibited. A nuclear incident caused by striking infrastructure connected to a reactor would qualify. The US excludes Bushehr from target lists but cannot guarantee that strikes on nearby infrastructure won't affect the facility. The 11-minute power loss proves the limitation of exclusion zones in modern warfare.