Mechanisms of Surface Adsorption in Homogeneous Reactor Loops. Semi- Annual Report No. 2 for 1 July to 31 December, 1957

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Homogeneous reactor operating conditions in which solids and deposits are formed on loops were examined. Methods of removing existing deposits are also considered. Experiments were conducted to study the characteristics of solids and deposits on type-347 stainless steel and on Zircaloy-2 specimens using simulated homogeneous reactor solutions in a rocking autoclave. Ferric and chromic sulfate were added to the solution in some of the tests to form solids by hydrolysis. Four tests were run at 300 deg C, while other tests were conducted with temperatures cycling at 200 to 300, 240 to 300, 270 to 300, and 240 to 270 … continued below

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31 pages : illustrations

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Eding, H. J. October 31, 1959.

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  • Main Title: Mechanisms of Surface Adsorption in Homogeneous Reactor Loops. Semi- Annual Report No. 2 for 1 July to 31 December, 1957
  • Series Title: AECU (Series)
  • Series Title: Atomic Energy Commission Reports
  • Added Title: Atomic Energy Commission Report AECU-4049

Description

Homogeneous reactor operating conditions in which solids and deposits are formed on loops were examined. Methods of removing existing deposits are also considered. Experiments were conducted to study the characteristics of solids and deposits on type-347 stainless steel and on Zircaloy-2 specimens using simulated homogeneous reactor solutions in a rocking autoclave. Ferric and chromic sulfate were added to the solution in some of the tests to form solids by hydrolysis. Four tests were run at 300 deg C, while other tests were conducted with temperatures cycling at 200 to 300, 240 to 300, 270 to 300, and 240 to 270 deg C. The deposits formed on stainless steel contained ferric-chromic oxide as the main identifiable crystalline compound. It was concluded from examination that the deposits were formed by corrosion and selective deposition. Zircaloy specimens in the same tests formed zirconia deposits by corrosion. The solids formed by hydrolysis were characterized by a large number of x-ray-diffraction lines in addition to those characteristic of ferric-chromic oxide, preferred orientation, and smaller crystalline size for solids and deposits. The particle size ranged from 1 mu to agglomerates of 100 mu . The solids were synthesized by hydrolysis of ferric, chromic, zirconium, and lanthanum sulfates. X-ray- diffraction patterns differed from those produced by corrosion and it is concluded that the study should be directed toward fundamental processes involved in solids formation. Solids from Oak Ridge loop experiments did not produce x- ray-diffraction patterns similar to those produced in the autoclave. A study of solids formation using radiochemical means is planned. (For preceding period see AECU-4050.) (J. R. D.)

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31 pages : illustrations

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Digitized from microopaque cards (2).

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  • Report No.: AECU-4049
  • SuDoc Number: Y 3.At 7:22/AECU-4049
  • Accession or Local Control No: metadc1240486
  • Archival Resource Key: ark:/67531/metadc1240486

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  • October 31, 1959

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  • Nov. 5, 2023, 7:52 a.m.

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Thumbnail image of item number 1 in: 'Mechanisms of Surface Adsorption in Homogeneous Reactor Loops. Semi- Annual Report No. 2 for 1 July to 31 December, 1957'.
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Eding, H. J. Mechanisms of Surface Adsorption in Homogeneous Reactor Loops. Semi- Annual Report No. 2 for 1 July to 31 December, 1957, report, October 31, 1959; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1240486/: accessed October 14, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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