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Naturally occurring strontium is nonradioactive and nontoxic at levels normally found in the environment, but 90 Sr is a radiation hazard. [4] 90 Sr undergoes β − decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an antineutrino, and the yttrium isotope 90 Y, which in turn undergoes β − decay with a half-life of 64 hours and a decay energy ...
Strontium-90 is a radioactive fission product produced by nuclear reactors used in nuclear power. It is a major component of high level radioactivity of nuclear waste ...
Zirconium-90 mostly forms by successive beta decays out of Strontium-90. A nonradioactive Zirconium sample can be extracted from spent fuel by extracting Strontium-90 and allowing enough of it to decay (e.g. In an RTG). The Zirconium can then be separated from the remaining strontium leaving a very isotopically pure Zr-90 sample.
Strontium-90 is a by-product of nuclear fission, present in nuclear fallout. The 1986 Chernobyl nuclear accident contaminated a vast area with 90 Sr. [6] It causes health problems, as it substitutes for calcium in bone, preventing expulsion from the body.
Strontium-90 has a shorter half-life, produces less power, and requires more shielding than plutonium-238, but is cheaper as it is a fission product and is present in a high concentration in nuclear waste and can be relatively easily chemically extracted. Strontium-90 based RTGs have been used to power remote lighthouses. [1]
It was the first time Wyand, a Navy veteran who lived and worked at the shipyard in the late 1980s, learned he may have been exposed to radium-226 and strontium-90 — radionuclides that build up ...
Strontium-90 has been used by the Soviet Union in terrestrial RTGs. 90 Sr decays by β − decay into 90 Y, which quickly decays again via β emission. It has a lower decay energy than 238 Pu, but its shorter half life of 28.8 years and lower atomic weight yield a power density for pure metal of 0.95 watts per gram. [42] As 90
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