Write in detail about Chernobyl accident.
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The Chernobyl disaster, also referred to as the Chernobyl accident, was a catastrophic nuclear accident. It occurred on 25–26 April 1986 in the No. 4 light water graphite moderated reactor at the Chernobyl Nuclear Power Plant near the now-abandoned town of Pripyat, in northern Ukrainian Soviet Socialist Republic, Soviet Union, approximately 104 km (65 mi) north of Kiev.[2]
The event occurred during a late-night safety test which simulated a station blackoutpower-failure, in the course of which safety systems were intentionally turned off. A combination of inherent reactor design flawsand the reactor operators arranging the corein a manner contrary to the checklist for the test, eventually resulted in uncontrolled reaction conditions. Water flashed into steam generating a destructive steam explosion and a subsequent open-air graphite fire.[note 1] This fire produced considerable updrafts for about nine days. These lofted plumes of fission products into the atmosphere. The estimated radioactive inventory that was released during this very hot fire phase approximately equaled in magnitude the airborne fission products released in the initial destructive explosion.[5]This radioactive material precipitated onto parts of the western USSR and other European countries.
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The event occurred during a late-night safety test which simulated a station blackoutpower-failure, in the course of which safety systems were intentionally turned off. A combination of inherent reactor design flawsand the reactor operators arranging the corein a manner contrary to the checklist for the test, eventually resulted in uncontrolled reaction conditions. Water flashed into steam generating a destructive steam explosion and a subsequent open-air graphite fire.[note 1] This fire produced considerable updrafts for about nine days. These lofted plumes of fission products into the atmosphere. The estimated radioactive inventory that was released during this very hot fire phase approximately equaled in magnitude the airborne fission products released in the initial destructive explosion.[5]This radioactive material precipitated onto parts of the western USSR and other European countries.
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