Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors Quarterly Progress Report: October 1 - December 31, 1963

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Description

A research program is being conducted to obtain experimental data in the irradiation of plutonium-enriched fuel to confirm a theoretical model for predicting isotopic composition and reactivity changes in plutonium-enriched, light-water-moderated reactors. Quarterly progress: Forty-six fuel pellet faces have been auto-radiographed. These faces have been prepared from twenty-three pellets by making an exposure before and after the removal of an additional ten mils of fuel. A substantial number of large "hot spots" continue to appear. The largest spot so far observed was 44 mils long, 20 mils wide, and of the order of 20 mils thick. This spot has a … continued below

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8 pages ; illustrations

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Robkin, M. A. January 15, 1964.

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  • Vallecitos Atomic Laboratory
    Publisher Info: General Electric Company. Vallecitos Atomic Laboratory. Atomic Power Equipment Department.
    Place of Publication: San Jose, California

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  • Main Title: Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors Quarterly Progress Report: October 1 - December 31, 1963
  • Uniform Title: Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors...quarterly Progress Report
  • Added Title: Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors Eleventh Quarterly Report: October 1 - December 31, 1963
  • Series Title: Atomic Energy Commission Reports
  • Series Title: GEAP (Series)
  • Series Title: General Electric Company Atomic Power Reports
  • Added Title: General Electric Atomic Power Equipment Department Report GEAP-4482

Description

A research program is being conducted to obtain experimental data in the irradiation of plutonium-enriched fuel to confirm a theoretical model for predicting isotopic composition and reactivity changes in plutonium-enriched, light-water-moderated reactors. Quarterly progress: Forty-six fuel pellet faces have been auto-radiographed. These faces have been prepared from twenty-three pellets by making an exposure before and after the removal of an additional ten mils of fuel. A substantial number of large "hot spots" continue to appear. The largest spot so far observed was 44 mils long, 20 mils wide, and of the order of 20 mils thick. This spot has a PuO2 concentration which varied from 70% on the periphery to 100% at then center. There is some evidence that the segregated regions are elongated with their long axes perpendicular to the direction of the pressing of the green pellet. Determination of the size and concentration distribution is continuing. The EPITHERMOS code now seems to be operating correctly. A test problem for a typical water lattice converged in eleven iterations. The computation of the spectrum for a pure water medium gave results which agreed very well with the expected 1/E spectrum. At the end of the quarter, the program fuel element had received a cumulative total of 4449 MWD/T exposure. This total is as logged by VBWR operating personnel. Applying the same scale factor, between logged exposure and Ce-Ca analysis of the first fuel sample, gives a corrected exposure of 5306 MWD/T. Three sets of flux wires were successfully irradiated at three thimble locations in the project fuel element. Counting is in progress and the data will be reduced in the next quarter. The program fuel element was removed from the VBWR during the November shutdown at the end of run 165 after a cumulative exposure of about 5000 MWD/T. Fuel pin F was removed for analysis, and pin U was moved over into its place. An unirradiated fuel pin, designated M, was inserted in the position vacated by U. The reassembled element was returned and reinserted in the VBWR. The VBWR discontinued operations in December, 1963. The project fuel element was removed from the reactor and placed in storage in the Fuel Storage Building.

Physical Description

8 pages ; illustrations

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Digitized from microopaque cards.

Prepared under U.S. Atomic Energy Commission Contract AT(04-3)-189 Project Agreement 21 for the Joint U.S.-Euratom Research and Development Program.

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  • Report No.: GEAP-4482
  • Grant Number: AT(04-3)-189 PA 21
  • SuDoc Number: Y 3.At 7:22/GEAP-4482
  • Accession or Local Control No: metadc1201415
  • Archival Resource Key: ark:/67531/metadc1201415

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  • January 15, 1964

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  • Aug. 15, 2019, 10:26 p.m.

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  • June 25, 2024, 1:08 a.m.

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Thumbnail image of item number 1 in: 'Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors Quarterly Progress Report: October 1 - December 31, 1963'.
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Robkin, M. A. Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors Quarterly Progress Report: October 1 - December 31, 1963, report, January 15, 1964; San Jose, California. (https://digital.library.unt.edu/ark:/67531/metadc1201415/: accessed December 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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