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boron control

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  • Boron — (pronEng|ˈbɔərɒn) is a chemical element with atomic number 5 and the chemical symbol B. Boron is a trivalent nonmetallic element which occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on… …   Wikipedia

  • boron — Symbol: B Atomic number: 5 Atomic weight: 10.811 An element of group 13 of the periodic table. There are two allotropes, amorphous boron is a brown power, but metallic boron is black. The metallic form is hard (9.3 on Mohs scale) and a bad… …   Elements of periodic system

  • boron carbide — n. a black, crystalline compound of boron and carbon, B4C, almost as hard as diamond: used as an abrasive and in control rods for nuclear reactors: see MOHS SCALE (sense 2) …   English World dictionary

  • Control rod — PWR control rod assembly, above fuel element A control rod is a rod made of chemical elements capable of absorbing many neutrons without fissioning themselves. They are used in nuclear reactors to control the rate of fission of uranium and… …   Wikipedia

  • Boron carbide — Chembox new Name = Boron carbide ImageFile = ImageSize = ImageName = Boron carbide IUPACName = Boron carbide OtherNames = Tetrabor B4 C B4C Black Diamond Section1 = Chembox Identifiers CASNo = 12069 32 8 Section2 = Chembox Properties Formula =… …   Wikipedia

  • boron carbide — Chem. a black, crystalline, extremely hard, water insoluble solid, B4C, used chiefly as a moderator in nuclear reactors, as an abrasive, and as a refractory. * * * ▪ chemical compound       (B4C), crystalline compound of boron and carbon. It is… …   Universalium

  • control rod — a neutron absorbing material, as boron or cadmium, in the shape of a rod or other configuration, that can be moved into or out of the core of a nuclear reactor to regulate the rate of fission. [1940 45] * * * …   Universalium

  • boron carbide — /bɔrɒn ˈkabaɪd / (say bawron kahbuyd) noun a black crystalline solid, B4C, which is the hardest known substance after diamond, and which is used as an abrasive and to form control rods in nuclear reactors …  

  • Wylfa nuclear power station — Wylfa is a nuclear power station situated just west of Cemaes Bay on the island of Anglesey, north Wales. Its location on the coast provides an excellent cooling source for its operation.It houses two 490 MW Magnox nuclear reactors, Wylfa 1 and… …   Wikipedia

  • BCR — B Cell Receptor (Medical » Human Genome) **** Banco Central de Reserva (International » Spanish) *** Breakpoint Cluster Region (Academic & Science » Mathematics) ** C. R. Bard, Inc. (Business » NYSE Symbols) * Ball Closure Ring (Business »… …   Abbreviations dictionary

  • автоматическое регулирование концентрации борного раствора на АЭС — автоматическое регулирование концентрации раствора борной кислоты на АЭС — [А.С.Гольдберг. Англо русский энергетический словарь. 2006 г.] Тематики энергетика в целом Синонимы автоматическое регулирование концентрации раствора борной кислоты …   Справочник технического переводчика

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