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Nuclear reactions induction

In peaceful uses of nuclear reactions, electrical power plants can be driven by a nuclear reactor very close to criticality, with careful control of neutron flux excess heat from the well-shielded nuclear reactor is driven off by a liquid (H20, Na, or Hg), which in a secondary cycle or a tertiary cycle generates electricity by turning induction turbines. [Pg.351]

Several isotopes (see Isotopes Isotope Labeling) of Cd are known, and 8 are stable (Table 3). For " Cd and " Cd, the nnclear spin is 1/2 and they are used for NMR studies of Cd compounds and in biological fields (see Cadmium Organometallic Chemistry). " Cd is used in the nuclear industry because of its high neutron cross section. Unstable isotopes are prepared from nuclear reactions. Cd stable isotope composition in geological and meteorite samples has been investigated using multiple collector inductively coupled plasma mass spectrometry. ... [Pg.527]

See also Activation Anaiysis Neutron Activation Charged-Particle Activation Photon Activation. Atomic Emission Spectrometry Inductively Coupled Plasma. Atomic Mass Spectrometry Inductively Coupled Plasma. Mass Spectrometry Overview. Surface Analysis Particle-Induced X-Ray Emission Auger Electron Spectroscopy Ion Scattering Nuclear Reaction Analysis and Elastic Recoil Detection. X-Ray Fluorescence and Emission Wavelength Dispersive X-Ray Fluorescence Energy Dispersive X-Ray Fluorescence. [Pg.4568]

Inductively coupled plasma sector field mass spectrometry (ICP-SFMS) is used to identify and characterize radiation-producing particles found in soils that received fallout from the Chernobyl accident in 1986 [99]. ICP-SFMS provided sufficiently low detection limits for the analysis of plutonium isotopes found in soils along with high levels of other isotopes produced in nuclear reactions (i.e., fission products). [Pg.457]

Essential for induction ofthe/Z-5 gene in inflammatory reactions is the binding site for nuclear factor kappa B (NF-kB). NF-kB responds to cytokines, stress, free radicals, ultraviolet irradiation, and bacterial, viral, or even parasitic antigens [2]. NF-kB stands for a family of subunits, which form homo-, and heterodimers. All NF-kB proteins share a highly conserved DNA-binding/dimerization domain called the Rel homology domain (RHD) consisting of two (3-strand core domains... [Pg.1227]

The use of excess formic acid to destroy excess nitric acid (5M) in nuclear fuel reprocessing waste solutions at 100°C is potentially hazardous because of an induction period, high exothermicity and the evolution of large amounts of gas, mainly carbon dioxide, dinitrogen oxide and nitrogen oxide, with some nitrogen and dini-trogen tetraoxide. The system has been studied thermokinetically, and the effects of various salts (which decrease the reaction rate) and sulfuric acid (which increases the rate) were determined [1],... [Pg.1650]

The induction periods for the reaction of sodium nitrate—bitumen mixtures (43 57 wt) heated at 195, 234 or 260°C are 44, 2 and 0.5 h, respectively. Further study of sodium nitrate/bitumenised waste systems held at these temperatures showed an initial weak exotherm around 260°C and a larger exotherm (0.96—1.21 kJ/g) accompanied by 50% wt loss around 430°C [1]. Following an actual accident while encapsulating nuclear waste the system has been re-examined. With small nitrate crystal size, the mixing process can potentially give runaway from little above 160°C, by initial surface reaction slowly warming until the salt melts, whereupon exother-micity sharply increases [2]. [Pg.1860]

Consider first some of the factors affecting the design of such laser schemes. Ground electronic state based laser enhancement schemes [216, 3 366] rely on the induction of nuclear dipole moments to aid in promoting a desii reaction [30, 367], For example, the use of infrared (IR) radiation has been propoS to overcome reaction barriers on the ground electronic state [30, 367]. However proposal requires powers on the order of terawatts per centimeter sipis (TW/cm2). At these powers nonresonant multiphoton absorption, which irtvar leads to ionization and/or dissociation, becomes dominant, drastically reducin, yield of the reaction of interest. [Pg.258]


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See also in sourсe #XX -- [ Pg.344 , Pg.345 , Pg.346 ]




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