Discovery of the First Leaking Double-Shell Tank - Hanford Tank 241-AY-102-14222

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Description

A routine video inspection of the annulus space between the primary tank and secondary liner of double-shell tank 241-AY-102 was performed in August 2012. During the inspection, unexpected material was discovered. A subsequent video inspection revealed additional unexpected material on the opposite side of the tank, none of which had been observed during inspections performed in December 2006 and January 2007. A formal leak assessment team was established to review the tank's construction and operating histories, and preparations for sampling and analysis began to determine the material's origin. A new sampling device was required to collect material from locations that ... continued below

Creation Information

Harrington, Stephanie J. & Sams, Terry L. November 6, 2013.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Hanford Site (Wash.)
    Publisher Info: HNF (Hanford Site (HNF), Richland, WA (United States))
    Place of Publication: Richland, Washington

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Description

A routine video inspection of the annulus space between the primary tank and secondary liner of double-shell tank 241-AY-102 was performed in August 2012. During the inspection, unexpected material was discovered. A subsequent video inspection revealed additional unexpected material on the opposite side of the tank, none of which had been observed during inspections performed in December 2006 and January 2007. A formal leak assessment team was established to review the tank's construction and operating histories, and preparations for sampling and analysis began to determine the material's origin. A new sampling device was required to collect material from locations that were inaccessible to the available sampler. Following its design and fabrication, a mock-up test was performed for the new sampling tool to ensure its functionality and capability of performing the required tasks. Within three months of the discovery of the unexpected material, sampling tools were deployed, material was collected, and analyses were performed. Results indicated that some of the unknown material was indicative of soil, whereas the remainder was consistent with tank waste. This, along with the analyses performed by the leak assessment team on the tank's construction history, lead to the conclusion that the primary tank was leaking into the annulus. Several issues were encountered during the deployment of the samplers into the annulus. As this was the first time samples had been required from the annulus of a double-shell tank, a formal lessons learned was created concerning designing equipment for unique purposes under time constraints.

Source

  • WM2014 International Waste Management Symposia 2014

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  • Report No.: WRPS-55823-FP Rev 0
  • Grant Number: DE-AC27-08RV14800
  • Office of Scientific & Technical Information Report Number: 1104543
  • Archival Resource Key: ark:/67531/metadc869075

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Creation Date

  • November 6, 2013

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

Description Last Updated

  • Nov. 1, 2016, 10:49 a.m.

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Harrington, Stephanie J. & Sams, Terry L. Discovery of the First Leaking Double-Shell Tank - Hanford Tank 241-AY-102-14222, article, November 6, 2013; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc869075/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.