Emission Rate of Fission Products from a Hole in the Cladding of a Reactor Fuel Element

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Description

It is assumed that when a hole appears in the cladding of a reactor fuel tube the fission products in the space between the fuel and the cladding will diffuse towards the hole. There they are swept away by the flow of steam past the hole. The process of diffusion is assumed to be governed by the ordinary diffusion equation with the boundary condition that the density of the fission products is zero at the surface of the hole. The diffusion equation is solved for the case of steady-state emission for a number of geometrical arrangements: long slit in plane … continued below

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11 pages

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Helstrom, Carl W. July 26, 1956.

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  • Main Title: Emission Rate of Fission Products from a Hole in the Cladding of a Reactor Fuel Element
  • Series Title: AECU (Series)
  • Series Title: Atomic Energy Commission Reports
  • Added Title: Atomic Energy Commission Report AECU-3220

Description

It is assumed that when a hole appears in the cladding of a reactor fuel tube the fission products in the space between the fuel and the cladding will diffuse towards the hole. There they are swept away by the flow of steam past the hole. The process of diffusion is assumed to be governed by the ordinary diffusion equation with the boundary condition that the density of the fission products is zero at the surface of the hole. The diffusion equation is solved for the case of steady-state emission for a number of geometrical arrangements: long slit in plane surface; long slit in cylindrical surfaces circular hole in plane surface; circular hole in cylindrical surface; hole at end of cylindrical fuel rods and diffusion space of variable thickness. The time dependent solution of the diffusion equation is also found for a planar diffusion space. The effect of a temperature gradient is discussed.

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11 pages

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Digitized from microopaque cards (1).

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  • Report No.: AECU-3220
  • SuDoc Number: Y 3.At 7:22/AECU-3220
  • Accession or Local Control No: metadc1248607
  • Archival Resource Key: ark:/67531/metadc1248607

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  • July 26, 1956

Added to The UNT Digital Library

  • July 9, 2023, 6 p.m.

Description Last Updated

  • Jan. 18, 2024, 12:08 p.m.

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Helstrom, Carl W. Emission Rate of Fission Products from a Hole in the Cladding of a Reactor Fuel Element, report, July 26, 1956; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1248607/: accessed May 15, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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