Chernobyl disasterThe Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the No. 4 reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian SSR in the Soviet Union. Called the world's worst-ever civil nuclear incident, it is one of only two nuclear energy accidents rated at seven—the maximum severity—on the International Nuclear Event Scale, the other being the 2011 Fukushima nuclear disaster in Japan.
Chernobyl exclusion zoneThe Chernobyl Nuclear Power Plant Zone of Alienation is an officially designated exclusion zone around the site of the Chernobyl nuclear reactor disaster. It is also commonly known as the Chernobyl Exclusion Zone, the 30-Kilometre Zone, or The Zone. Established by the Soviet Armed Forces soon after the 1986 disaster, it initially existed as an area of radius from the Chernobyl Nuclear Power Plant designated for evacuation and placed under military control. Its borders have since been altered to cover a larger area of Ukraine.
Chernobyl Nuclear Power PlantThe Chernobyl Nuclear Power Plant (ChNPP; Чорнобильська атомна електростанція; Чернобыльская атомная электростанция) is a nuclear power plant undergoing decommissioning. ChNPP is located near the abandoned city of Pripyat in northern Ukraine northwest of the city of Chernobyl, from the Belarus–Ukraine border, and about north of Kyiv. The plant was cooled by an engineered pond, fed by the Pripyat River about northwest from its juncture with the Dnieper.
UkraineUkraine (Ukraina, ʊkrɐˈjinɐ) is a country in Eastern Europe. It is the second-largest European country after Russia, which borders it to the east and northeast. It also borders Belarus to the north; Poland, Slovakia, and Hungary to the west; and Romania and Moldova to the southwest; with a coastline along the Black Sea and the Sea of Azov to the south and southeast. Kyiv is the nation's capital and largest city, followed by Kharkiv, Dnipro and Odesa. Ukraine's official language is Ukrainian; Russian is also widely spoken, especially in the east and south.
PripyatPripyat (ˈpriːpjət,_ˈprɪp- ; При́пять), also known as Prypiat (При́пʼять, ˈprɪpjɐtj), is an abandoned city in northern Ukraine, located near the border with Belarus. Named after the nearby river, Pripyat, it was founded on 4 February 1970 as the ninth atomgrad (a type of closed town in the Soviet Union) to serve the nearby Chernobyl Nuclear Power Plant, which is located in the adjacent ghost city of Chernobyl. Pripyat was officially proclaimed a city in 1979 and had grown to a population of 49,360 by the time it was evacuated on the afternoon of 27 April 1986, one day after the Chernobyl disaster.
Caesium-137Caesium-137 (), cesium-137 (US), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons. Trace quantities also originate from spontaneous fission of uranium-238. It is among the most problematic of the short-to-medium-lifetime fission products.
Russian invasion of UkraineOn 24 February 2022, in an escalation of the Russo-Ukrainian War which began in 2014. The invasion has killed tens of thousands on both sides. Russian forces have been responsible for mass civilian casualties and for torturing captured Ukrainian soldiers. By June 2022, about 8 million Ukrainians had been internally displaced. More than 8.2 million had fled the country by May 2023, becoming Europe's largest refugee crisis since World War II. Extensive environmental damage, widely described as ecocide, contributed to food crises worldwide.
GomelGomel or Homiel (Гомель, ˈɡomjɪlj, ˈɣomjelj) is a city in Belarus. It serves as the administrative centre of Gomel Region and Gomel District, though it is administratively separated from the district. As of 2023, it is the second-largest city in Belarus with 501,802 inhabitants. There are at least six narratives of the origin of the city's name. The most plausible is that the name is derived from the name of the stream Homeyuk, which flowed into the river Sozh near the foot of the hill where the first settlement was founded.
Nuclear and radiation accidents and incidentsA nuclear and radiation accident is defined by the International Atomic Energy Agency (IAEA) as "an event that has led to significant consequences to people, the environment or the facility. Examples include lethal effects to individuals, large radioactivity release to the environment, reactor core melt." The prime example of a "major nuclear accident" is one in which a reactor core is damaged and significant amounts of radioactive isotopes are released, such as in the Chernobyl disaster in 1986 and Fukushima nuclear disaster in 2011.
Nuclear falloutNuclear fallout is the residual radioactive material propelled into the upper atmosphere following a nuclear blast, so called because it "falls out" of the sky after the explosion and the shock wave has passed. It commonly refers to the radioactive dust and ash created when a nuclear weapon explodes. The amount and spread of fallout is a product of the size of the weapon and the altitude at which it is detonated.
