Evaluation of Leak Seal Additives - Cooling Water Pipe in Nuclear Wastes

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Pre-deployment and degradation testing of commercial leak seal products were performed to evaluate the potential for remote, short-term repair of leaks in waste storage tank cooling coils. A liquid glass metallic product was identified for extensive testing after initial screening of four candidates. Testing was performed with manufactured holes and slits in an immersed pipe operated at nominal coil pressure (approximately 50 psig). The maximum leak sizes that sealed under simulated field conditions were a slit, 0.016 times 0.291 in. (leak rate, 1.34 gpm) and a 0.046 inch diameter hole (leak rate, 0.63 gpm). Degradation of seals and of the ... continued below

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JENKINS, CHARLES November 2, 2004.

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Pre-deployment and degradation testing of commercial leak seal products were performed to evaluate the potential for remote, short-term repair of leaks in waste storage tank cooling coils. A liquid glass metallic product was identified for extensive testing after initial screening of four candidates. Testing was performed with manufactured holes and slits in an immersed pipe operated at nominal coil pressure (approximately 50 psig). The maximum leak sizes that sealed under simulated field conditions were a slit, 0.016 times 0.291 in. (leak rate, 1.34 gpm) and a 0.046 inch diameter hole (leak rate, 0.63 gpm). Degradation of seals and of the constituent fiber samples was studied for radiation and for immersion in water and simulated waste. Seals withstood doses up 1.66E7 R, equivalent to 2 years in a nuclear waste tank. A seal functioned for 50 days when immersed in simulated waste at 75-80 C, low-pressure cooling water at 27-35 C, and several salt/desalt cycles. A small leak occurred at 23 days, but self-healed. The limited test results provided confidence that small leaks in the evaporator cooling coils could be repaired. Visual sighting of the leaks in situ was unsuccessful, so geometry and locations were unknown. A simple deployment system was designed to introduce the sealant to the coil assemblies. The coils have successfully operated for three years with only one reapplication necessary.

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  • NACE Corrosion 2005, Houston, TX (US), 04/03/2005--04/07/2005

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  • Report No.: WSRC-MS-2004-00762
  • Office of Scientific & Technical Information Report Number: 835060
  • Archival Resource Key: ark:/67531/metadc777158

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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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  • November 2, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • May 5, 2016, 6 p.m.

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JENKINS, CHARLES. Evaluation of Leak Seal Additives - Cooling Water Pipe in Nuclear Wastes, article, November 2, 2004; South Carolina. (digital.library.unt.edu/ark:/67531/metadc777158/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.