Mechanistic Modeling of Porosity in Hanford 3013 Outer Container Welds

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One of the current priorities within the Department of Energy (DOE) complex is the stabilization, packaging and storage of plutonium-bearing materials. The packaging is key to the safe long-term handling and storage of these materials. Packaging consists of placing the stabilized materials into a set of two nested stainless steel containers. Each container is seal-welded, providing double containment of the plutonium materials. The outer container is designated as the primary barrier to the release of the materials to the environment. An initial, full scope diagnostic analysis of the equipment, welding materials / consumables and process conditions identified the primary cause ... continued below

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Daugherty, W.L. November 26, 2002.

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One of the current priorities within the Department of Energy (DOE) complex is the stabilization, packaging and storage of plutonium-bearing materials. The packaging is key to the safe long-term handling and storage of these materials. Packaging consists of placing the stabilized materials into a set of two nested stainless steel containers. Each container is seal-welded, providing double containment of the plutonium materials. The outer container is designated as the primary barrier to the release of the materials to the environment. An initial, full scope diagnostic analysis of the equipment, welding materials / consumables and process conditions identified the primary cause of the porosity to be related to geometry at the root of the weld joint preparation. A volume of gas is trapped between the advancing weld puddle and the start of the weld, at weld tie-in, and incorporated into the weld during puddle solidification. Figure 5 illustrates the basic geometric conditions contributing to the porosity. This paper describes the efforts to analyze and understand / quantify the interaction between the weld-joint geometry and formation of porosity.

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  • Journal Name: Science and Technology of Welding and Joining

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  • Report No.: WSRC-MS-2002-00693, Rev. 1
  • Grant Number: AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 805318
  • Archival Resource Key: ark:/67531/metadc734556

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  • November 26, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • May 5, 2016, 2:08 p.m.

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Daugherty, W.L. Mechanistic Modeling of Porosity in Hanford 3013 Outer Container Welds, article, November 26, 2002; South Carolina. (digital.library.unt.edu/ark:/67531/metadc734556/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.