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  1. Chernobyl disaster - Wikipedia

    The reactor components ruptured and lost coolant, and the resulting steam explosions and meltdown destroyed the reactor building. This was followed by a reactor core fire that spread radioactive …

  2. Chernobyl Accident 1986 - World Nuclear Association

    Feb 17, 2025 · The Chernobyl accident in 1986 was the result of a flawed reactor design that was operated with inadequately trained personnel. Two Chernobyl plant workers died on the night of the …

  3. Chernobyl disaster | Causes, Effects, Deaths, Videos, Location, & Facts ...

    Dec 25, 2025 · The Chernobyl disaster occurred when technicians at nuclear reactor Unit 4 attempted a poorly designed experiment. They shut down the reactor’s power-regulating system and its …

  4. The reactor was shut down and the core was cleaned on the next day after the shutdown by pumping of an emergency reserve of nitrogen through the core to the ventilation chimney.

  5. Chernobyl - Atomic Archive

    On April 26th, 1986 the world's worst nuclear power accident occurred at Chernobyl nuclear power plant in the Soviet Republic of Ukraine. The accident occurred when technicians at reactor Unit 4 …

  6. Is Chernobyl's Reactor Core Still 'Melting'? - RealClearScience

    May 10, 2022 · After the catastrophe in 1986, the core of reactor #4 reached more than 1132°C, causing the uranium to melt down and blend with surrounding zirconium, graphite, and sand into a …

  7. Elephant's Foot (Chernobyl) - Wikipedia

    It was formed during the Chernobyl disaster of April 1986 from a lava-like mixture of molten core material that had escaped the reactor enclosure, materials from the reactor itself, and structural …

  8. Chernobyl: Chapter I. The site and accident sequence

    The sudden increase in heat production ruptured part of the fuel and small hot fuel particles, reacting with water, caused a steam explosion, which destroyed the reactor core. A second explosion added …

  9. Frequently Asked Chernobyl Questions - International Atomic Energy …

    On April 26, 1986, the Number Four RBMK reactor at the nuclear power plant at Chernobyl, Ukraine, went out of control during a test at low-power, leading to an explosion and fire that demolished the …

  10. The Elephant’s Foot of Chernobyl - Hadron

    Nov 26, 2024 · On April 26, 1986, a low-power test was run on one of the reactors at the Chernobyl nuclear plant in Chernobyl, Ukraine. A power surge hit the reactor aggressively, causing the nuclear …