Microwave heating simulations of fission energy generation in volume-boiling pool systems

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The transition phase of the (hypothetical) loss-of-flow accident in LMFBR's may be characterized by the temporary entrapment of boiling pools of molten fuel and steel within the original core boundaries. Experiments to investigate the multiphase flow and heat transfer characteristics of such systems have been performed and are planned in which simulant fluids are volume-heated by microwave electromagnetic radiation. It has been assumed that the microwave radiation provides a spatially uniform energy source per unit volume of liquid in multiphase flow geometries. It is known, however, that energy absorption by dielectrics in a microwave electromagnetic field is a function of … continued below

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8 pages

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Makowitz, H. & Ginsberg, T. January 1, 1979.

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The transition phase of the (hypothetical) loss-of-flow accident in LMFBR's may be characterized by the temporary entrapment of boiling pools of molten fuel and steel within the original core boundaries. Experiments to investigate the multiphase flow and heat transfer characteristics of such systems have been performed and are planned in which simulant fluids are volume-heated by microwave electromagnetic radiation. It has been assumed that the microwave radiation provides a spatially uniform energy source per unit volume of liquid in multiphase flow geometries. It is known, however, that energy absorption by dielectrics in a microwave electromagnetic field is a function of geometry, dielectric properties, and wavelength of the radiation. At high power density, volume-heated boiling pools exhibit a complex two-phase, liquid-vapor, geometric structure. Dispersed droplets, with diameters less than 1 mm, in a vapor continuum may coexist with continuous liquid structures of centimeter scale or greater. This study was performed to: (i) investigate the uniformity of microwave heating in boiling pool systems as a function of liquid geometry; and (ii) design an experimental system employing microwave heating in which the heat generation rate per unit volume of liquid is independent of geometric structure. The results of the study are presented.

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8 pages

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Dep. NTIS, PC A02/MF A01.

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  • ANS annual meeting, Atlanta, GA, USA, 3 Jun 1979

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  • Report No.: BNL-NUREG-25575
  • Report No.: CONF-790602-4
  • Grant Number: EY-76-C-02-0016
  • Office of Scientific & Technical Information Report Number: 6168986
  • Archival Resource Key: ark:/67531/metadc1106687

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1979

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  • Feb. 22, 2018, 7:45 p.m.

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  • Feb. 25, 2021, 9:08 p.m.

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Makowitz, H. & Ginsberg, T. Microwave heating simulations of fission energy generation in volume-boiling pool systems, article, January 1, 1979; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc1106687/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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