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232 Th is a fertile material able to absorb a neutron and undergo transmutation into the fissile nuclide uranium-233, which is the basis of the thorium fuel cycle. [56] In the form of Thorotrast , a thorium dioxide suspension , it was used as a contrast medium in early X-ray diagnostics.
The longest-lived and most abundant (nearly 100%) naturally occurring isotope of protactinium, protactinium-231, has a half-life of 32,760 years and is a decay product of uranium-235. Much smaller trace amounts of the short-lived protactinium-234 and its nuclear isomer protactinium-234m occur in the decay chain of uranium-238.
The isotopic composition of natural uranium is 238 U (relative abundance 99.2742%), 235 U (0.7204%) and 234 U (0.0054%); of these 238 U has the largest half-life of 4.51 × 10 9 years. [ 71 ] [ 72 ] The worldwide production of uranium in 2009 amounted to 50,572 tonnes , of which 27.3% was mined in Kazakhstan .
Manhattan District The Trinity test of the Manhattan Project on 16 July 1945 was the first detonation of a nuclear weapon. Active 1942–1946 Disbanded 15 August 1947 Country United States United Kingdom Canada Branch U.S. Army Corps of Engineers Garrison/HQ Oak Ridge, Tennessee, U.S. Anniversaries 13 August 1942 Engagements Allied invasion of Italy Allied invasion of France Allied invasion of ...
Current methods make it difficult to measure half-lives between approximately 10 ... 186.1 16.08 gadolinium-153: 240.4 20.77 ... uranium-235: 703.8 22.21 10 9 years ...
In nuclear power technology, burnup (also known as fuel utilization) is a measure of how much energy is extracted from a primary nuclear fuel source. It is measured as the fraction of fuel atoms that underwent fission in %FIMA (fissions per initial metal atom) [1] or %FIFA (fissions per initial fissile atom) [2] as well as, preferably, the actual energy released per mass of initial fuel in ...
Spontaneous fission (SF) is a form of radioactive decay in which a heavy atomic nucleus splits into two or more lighter nuclei. In contrast to induced fission, there is no inciting particle to trigger the decay; it is a purely probabilistic process.
TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion.The ton of TNT is a unit of energy defined by convention to be 4.184 gigajoules (1 gigacalorie), [1] which is the approximate energy released in the detonation of a metric ton (1,000 kilograms) of TNT.