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Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactively decays by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the tiny concentrations found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is studied for future industrial use in nuclear technology. Uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons; uranium-235, and to a lesser degree uranium-233, have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating.The 1789 discovery of uranium in the mineral pitchblende is credited to Martin Heinrich Klaproth, who named the new element after the recently discovered planet Uranus. Eugène-Melchior Péligot was the first person to isolate the metal and its radioactive properties were discovered in 1896 by Henri Becquerel. Research by Otto Hahn, Lise Meitner, Enrico Fermi and others, such as J. Robert Oppenheimer starting in 1934 led to its use as a fuel in the nuclear power industry and in Little Boy, the first nuclear weapon used in war. An ensuing arms race during the Cold War between the United States and the Soviet Union produced tens of thousands of nuclear weapons that used uranium metal and uranium-derived plutonium-239. Dismantling of these weapons and related nuclear facilities is carried out within various nuclear disarmament programs and costs billions of dollars. Weapon-grade uranium obtained from nuclear weapons is diluted with uranium-238 and reused as fuel for nuclear reactors. The development and deployment of these nuclear reactors continue on a global base as they are powerful sources of CO2-free energy. Spent nuclear fuel forms radioactive waste, which mostly consists of uranium-238 and poses significant health threat and environmental impact.

Uranium

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Ryska invasionen

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Anders Hovne

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Kärnavtalet med Iran

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”Våt smällare” men ändå en fara – tar Putins offensiv slut nu?

The South Ukraine Nuclear Power Plant (Ukrainian: Південноукраїнська АЕС), also known as the Pivdennoukrainsk Nuclear Power Plant, is a nuclear power plant in Ukraine, near the city of Yuzhnoukrainsk in Mykolaiv Oblast, about 350 kilometres (220 mi) south of Kyiv. It is the second largest of the country's five nuclear power stations. It is part of the South Ukrainian Energy Complex, along with the Tashlyk Pumped-Storage Power Plant and Oleksandrivska hydroelectric power station.
It has three VVER-1000 pressurized water reactors and a net generation capacity of 2,850 megawatts (MW). In 2013, following major upgrade work, unit 1 was given a 10-year license extension, which will take it beyond its original 30-year design lifetime. Similar extensions are planned for units 2 and 3, licensed until 2015 and 2019, respectively.The 750 kV Vetrino–Isaccea–Yuzhnoukrainsk powerline runs from the plant to Isaccea, Romania, but is mostly dismantled or ruined.According to Ukraine, Russian troops were advancing to the plant in the 2022 Russian invasion of Ukraine, but were repelled in the March 2022 Battle of Voznesensk.

On 19 September 2022, the power plant was reportedly hit by Russian artillery. A missile exploded about 300 metres from the reactors, blowing out windows in the buildings and damaging a neighbouring hydroelectric power station. Nuclear reactors were not damaged.

South Ukraine Nuclear Power Plant

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The Joint Comprehensive Plan of Action (JCPOA; Persian: برنامه جامع اقدام مشترک, romanized: barnāmeye jāme'e eqdāme moshtarak (برجام, BARJAM)), commonly known as the Iran nuclear deal or Iran deal, is an agreement on the Iranian nuclear program reached in Vienna on 14 July 2015, between Iran and the P5+1 (the five permanent members of the United Nations Security Council—China, France, Russia, United Kingdom, United States—plus Germany) together with the European Union.
Formal negotiations toward JCPOA began with the adoption of the Joint Plan of Action, an interim agreement signed between Iran and the P5+1 countries in November 2013. Iran and the P5+1 countries engaged in negotiations for the next 20 months and, in April 2015, agreed on an "Iran nuclear deal framework" for the final agreement. In July 2015, Iran and the P5+1 confirmed agreement on the plan, along with the "Roadmap Agreement" between Iran and the IAEA.After the Trump administration twice certified Iran's compliance in 2017, in May 2018 the United States withdrew from JCPOA as Trump pledged he would negotiate a better deal. Trump left office without fulfilling that pledge and analysts determined Iran had moved closer to developing a nuclear weapon since the American withdrawal.

Joint Comprehensive Plan of Action

Linnea Järkstig

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Bara Posten Bemanning

Linus Lindgren

The Zaporizhzhia Nuclear Power Station (Ukrainian: Запорізька атомна електростанція, romanized: Zaporiz'ka atomna elektrostantsiya, Russian: Запорожская атомная электростанция, romanized: Zaporozhskaya atomnaya elektrostantsiya) in southeastern Ukraine is the largest nuclear power plant in Europe and among the 10 largest in the world. It was built by the Soviet Union near the city of Enerhodar, on the southern shore of the Kakhovka Reservoir on the Dnieper river. It is operated by Energoatom, who also operate Ukraine's other three nuclear power stations.
The plant has six VVER-1000 pressurized light water nuclear reactors (PWR), each fuelled with 235U (LEU) and generating 950 MWe, for a total power output of 5,700 MWe. The first five were successively brought online between 1985 and 1989, and the sixth was added in 1995. The plant generates nearly half of the country's electricity derived from nuclear power, and more than a fifth of total electricity generated in Ukraine. The Zaporizhzhia thermal power station is nearby.
On 4 March 2022, the nuclear and thermal power stations were both captured by Russian forces during the Battle of Enerhodar of the 2022 Russian invasion of Ukraine. As of 12 March 2022 the plant is reportedly controlled by the Russian company Rosatom. The plant continued to be operated by Ukrainian staff, under Russian control, until 11 September 2022, when the sixth reactor was disconnected.

Zaporizhzhia Nuclear Power Plant

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