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About: Iodine pit     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Substance100019613, within Data Space : dbpedia.org associated with source document(s)

Type: yago:Abstraction100002137yago:Atom114619225yago:Isotope114619658yago:Matter100020827yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatIsotopesOfXenonyago:Substance100019613 New Facet based on Instances of this Class

The iodine pit, also called the iodine hole or xenon pit, is a temporary disabling of a nuclear reactor due to buildup of short-lived nuclear poisons in the reactor core. The main isotope responsible is 135Xe, mainly produced by natural decay of 135I. 135I is a weak neutron absorber, while 135Xe is the strongest known neutron absorber. When 135Xe builds up in the fuel rods of a reactor, it significantly lowers their reactivity, by absorbing a significant amount of the neutrons that provide the nuclear reaction.