Zaporizhzhia Nuclear Power Plant — Safety Tracker
Europe's largest nuclear power plant was seized by Russian forces on March 4, 2022. The IAEA has maintained a permanent presence since September 2022, documenting ongoing safety violations. All 6 reactors are in cold shutdown. The risk of nuclear incident remains elevated.
IAEA Seven Pillars of Nuclear Safety — Current Status
Safety Incident Timeline
Russian forces attacked and seized the Zaporizhzhia NPP complex. Fire broke out in the training building during the assault. First time in history a nuclear plant was seized during active combat.
Russian military occupied the plant; Ukrainian staff remained working under duress. IAEA warned of "unprecedented" situation with staff under extreme stress and coercion.
Heavy shelling near ZNPP damaged high-voltage power lines. Both sides accused each other. IAEA called for urgent access. UN Secretary-General called for demilitarized zone.
First IAEA mission arrived at ZNPP. Director General Grossi led initial assessment. Team found evidence of military presence and damage. Permanent IAEA monitoring mission established.
Last external 750kV power line lost; ZNPP operating on single 330kV backup line — unprecedented INES safety concern. Plant can only maintain cooling via emergency diesels if external power fails completely.
ZNPP disconnected from Ukrainian grid entirely — lost all external power. Diesel generators activated. Plant fully in "cold shutdown." IAEA: one of seven pillars of nuclear safety now violated.
IAEA warned about integrity of cooling ponds. Reports that Russian forces stored military equipment in turbine halls. Plant gradually moved all 6 reactors to cold shutdown.
Repeated losses of external power — ZNPP relying on single backup 330kV line. Diesel fuel reserves critically low at multiple points. IAEA called situation "extremely precarious."
IAEA continued rotating presence. Permanent monitoring team rotated every ~2 months. Found no evidence of mines under reactors, contrary to some earlier reports.
Nova Kakhovka dam destroyed — ZNPP cooling ponds no longer replenishable from Kakhovka reservoir via canal. Ukraine and IAEA assessed backup cooling systems could maintain safety for months.
Cooling pond water level monitored closely following Kakhovka dam breach. IAEA: pond has enough water for "months" without reservoir replenishment. Level tracking ongoing.
Continued periodical shelling in vicinity of ZNPP. IAEA reiterated calls for nuclear safety zone. Russian forces maintained military presence at plant throughout this period.
Staff numbers continued to decline. Many original Ukrainian specialists fled or were replaced by Russian personnel. IAEA noted persistent concerns about qualifications and psychological state of remaining workforce. As of early 2026, IAEA maintains rotating team of 2–5 inspectors on-site.
IAEA maintains permanent presence with 2–5 inspectors rotating. Seven nuclear safety pillars remain at risk. IAEA calls for nuclear safety zone and demilitarization of the plant.
Why ZNPP Matters
Largest in Europe
ZNPP has 6 × 1,000 MW reactors — total capacity 5,700 MW. Pre-war it supplied ~20% of Ukraine's electricity.
Cooling Dependency
Reactors need continuous cooling even in shutdown. Loss of all external power + diesel failure could lead to fuel overheating within hours.
Chornobyl Comparison
ZNPP is 10× the size of Chornobyl. A major accident could be catastrophic for Ukraine, Moldova, Romania, and beyond. Wind patterns determine fallout zones.
International Response
IAEA Director Grossi has visited ZNPP multiple times. UN Security Council has held emergency sessions. Russia and Ukraine both blame each other for safety violations.