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The Kyshtym disaster, sometimes referred to as the Mayak disaster or Ozyorsk disaster in newer sources, was a radioactive contamination accident that occurred on 29 September 1957 at Mayak, a plutonium production site for nuclear weapons and nuclear fuel reprocessing plant located in the closed city of Chelyabinsk-40 (now Ozyorsk) in Chelyabinsk Oblast, Russian SFSR, Soviet Union.
The Chernobyl disaster [a] began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union. [1] It is one of only two nuclear energy accidents rated at seven—the maximum severity ...
Nyonoksa radiation accident. Explosive destruction of an "isotope power source" (officially). Allegedly a failed 9M730 Burevestnik nuclear-powered cruise missile test/recovery. The Nyonoksa radiation accident, Arkhangelsk explosion or Nyonoksa explosion ( Russian: Инцидент в Нёноксе, romanized : Intsident v Nyonokse) occurred on ...
The world's worst nuclear accident has been the 1986 Chernobyl disaster in the Soviet Union, one of two accidents that has been rated as a level 7 (the highest) event on the International Nuclear Event Scale. [9] Note that the Chernobyl disaster may have scored an 8 or 9, if the scale continued.
Chernobyl was chosen as the site of Ukraine's first nuclear power plant in 1972, located 15 kilometres (9 mi) north of the city, which opened in 1977. Chernobyl was evacuated on 5 May 1986, nine days after a catastrophic nuclear disaster at the plant, which was the largest nuclear disaster in history.
Initially, the Soviet Union 's toll of deaths directly caused by the Chernobyl disaster included only the two Chernobyl Nuclear Power Plant workers killed in the immediate aftermath of the explosion of the plant's reactor. However, by late 1986, Soviet officials updated the official count to 30, reflecting the deaths of 28 additional plant ...
During the Russian invasion of Ukraine, the Chernobyl Exclusion Zone was captured [3] on 24 February, the first day of the invasion, by the Russian Armed Forces, [4] who entered Ukrainian territory from neighbouring Belarus and seized the entire area of the Chernobyl Nuclear Power Plant by the end of that day.
The Soviet nuclear submarine K-129 sank with a crew of 98 due to an explosion of unknown cause. The International Atomic Energy Agency stated that two nuclear warheads from K-129 were located in the Pacific 1,230 miles from Kamchatka at coordinates 40°6'N and 179°57'E at a depth of 6,000 metres (20,000 ft), and lists them as recovered.