REACTIVITY CHANGES ASSOCIATED WITH SLURRY SETTLING IN SMALL SLURRY REACTORS

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The reactivity changes resulting from slurry settling were computed for a number of small one-region slurry reactors using an IBM-704 routine. Calculations were performed for three temperatures, two sizes, and five initial thorium concentrations. In general, reactivity additions on settling were observed which decreased with increasing thorium inventory, increasing temperature, and decreasing diameter. For example, at l00 deg C a 2.5-ft diameter square'' cylinder (height equal to diameter) showed a maximum reactivity introduction of 4% sigma k/k with an initial concentration of 100 g Th/l and a moderator composition of 75% D/sub 2/O, 25% H/sub 2/O; at 200 deg C ... continued below

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Pages: 9

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Nestor, C.W. Jr. & Rosenthal, M.W. February 1, 1959.

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The reactivity changes resulting from slurry settling were computed for a number of small one-region slurry reactors using an IBM-704 routine. Calculations were performed for three temperatures, two sizes, and five initial thorium concentrations. In general, reactivity additions on settling were observed which decreased with increasing thorium inventory, increasing temperature, and decreasing diameter. For example, at l00 deg C a 2.5-ft diameter square'' cylinder (height equal to diameter) showed a maximum reactivity introduction of 4% sigma k/k with an initial concentration of 100 g Th/l and a moderator composition of 75% D/sub 2/O, 25% H/sub 2/O; at 200 deg C the maximum reactlvity introduction was 3.6%. With the same conditions, a 2-ft diameter square'' cylinder was subcritical on settling. For an initial thorium concentration of 400 g Th/l the 2.5-ft reactor showed a reactivity introduction of 1.4% at 100 deg C and 0.7% at 200 deg C. (auth)

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Pages: 9

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  • Other Information: Orig. Receipt Date: 31-DEC-59

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  • Report No.: CF-59-2-10
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4291388 | External Link
  • Office of Scientific & Technical Information Report Number: 4291388
  • Archival Resource Key: ark:/67531/metadc1027000

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  • February 1, 1959

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 20, 2017, 2:44 p.m.

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Nestor, C.W. Jr. & Rosenthal, M.W. REACTIVITY CHANGES ASSOCIATED WITH SLURRY SETTLING IN SMALL SLURRY REACTORS, report, February 1, 1959; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc1027000/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.