FY2005 AND FY2006 CORROSION SURVEILLANCE RESULTS FOR L BASIN

One of 84 reports in the series: Fiscal Year 2005 available on this site.

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This report documents the results of the L-Basin Corrosion Surveillance Program for the fiscal years 2005 and 2006. The water quality and basin conditions for the coupon immersion period are compared to the corrosion evaluation results from detailed metallurgical analysis of the coupons. Test coupons were removed from the basin on two occasions, March 29, 2005 and May 23, 2006, examined and photographed. Selected coupons were metallurgically characterized to evaluate the extent of general corrosion and pitting. Crystallographic and energy dispersive spectroscopy analysis were performed on a typical specimen, as-removed from the basin, to characterize the surface debris. Marked changes ... continued below

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Vormelker, P & Cynthia Foreman, C January 30, 2008.

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This report documents the results of the L-Basin Corrosion Surveillance Program for the fiscal years 2005 and 2006. The water quality and basin conditions for the coupon immersion period are compared to the corrosion evaluation results from detailed metallurgical analysis of the coupons. Test coupons were removed from the basin on two occasions, March 29, 2005 and May 23, 2006, examined and photographed. Selected coupons were metallurgically characterized to evaluate the extent of general corrosion and pitting. Crystallographic and energy dispersive spectroscopy analysis were performed on a typical specimen, as-removed from the basin, to characterize the surface debris. Marked changes were noted in both the 2005 and 2006 specimens compared to previous years corrosion results. A new pitting incidence has occurred on the faces of the aluminum coupons compared to localized pitting at crevice regions only on specimens withdrawn in 2003 and 2004. The pitting incidence is attributed to sand filter fines that entered the basin on July 27, 2004 from an inadvertent backflush of the new sand filter. Pitting rate results show a trend of slowing down over time which is consistent with aluminum pit kinetics. Average pit growth rates were equal to or lower in all 2006 aluminum coupons than those removed in 2005. A trend line shows that pitting corrosion rates on Al1100, 6061, and 6063 coupons are slowing down since pit depth measurements were initiated in 2003. No impact to stored spent fuel is expected from the debris. The storage configuration of the majority of L-Basin spent fuel, in bundles, should provide a measure of isolation from debris settling in the basin.

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  • Report No.: WSRC-STI-2007-00692
  • Grant Number: DE-AC09-96SR18500
  • DOI: 10.2172/923047 | External Link
  • Office of Scientific & Technical Information Report Number: 923047
  • Archival Resource Key: ark:/67531/metadc901792

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 30, 2008

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 9, 2016, 11:32 p.m.

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Vormelker, P & Cynthia Foreman, C. FY2005 AND FY2006 CORROSION SURVEILLANCE RESULTS FOR L BASIN, report, January 30, 2008; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc901792/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.