Electrical Discharge Machining Techniques for Evaluating the Effects of Tritium on Materials

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In this investigation, new ways to evaluate the long-term effects of tritium on the structural properties of components were developed. Electric discharge machining (EDM) techniques for cutting tensile and fracture toughness samples from the tritium-exposed regions of returned reservoirs were demonstrated. An existing electric discharge machine was used to cut sub-size tensile and fracture toughness samples from the inside walls of reservoir mock-ups. Tensile properties from the EDM tensile samples were similar to those measured using full-size samples cut from similar stock. Although the existing equipment could not be used for machining tritium-exposed hardware, off-the-shelf EDM units are available that ... continued below

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IMRICH, KENNETH March 24, 2004.

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In this investigation, new ways to evaluate the long-term effects of tritium on the structural properties of components were developed. Electric discharge machining (EDM) techniques for cutting tensile and fracture toughness samples from the tritium-exposed regions of returned reservoirs were demonstrated. An existing electric discharge machine was used to cut sub-size tensile and fracture toughness samples from the inside walls of reservoir mock-ups. Tensile properties from the EDM tensile samples were similar to those measured using full-size samples cut from similar stock. Although the existing equipment could not be used for machining tritium-exposed hardware, off-the-shelf EDM units are available that could. With the right equipment and the required radiological controls in place, similar machining and testing techniques could be used to directly measure the effects of tritium on the properties of material cut from reservoir returns. Stress-strain property data from tritium-exposed reservoirs would improve finite-element modeling of reservoir performance because the data are representative of the true state of the reservoir material in the field. Tensile data from samples cut directly from reservoirs complement existing shelf storage and burst test data of the Life Storage Program and help answer questions about a specific reservoir's processing history and properties.

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  • Other Information: PBD: 24 Mar 2004

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  • Report No.: WSRC-TR-2003-00490
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/822343 | External Link
  • Office of Scientific & Technical Information Report Number: 822343
  • Archival Resource Key: ark:/67531/metadc777206

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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.

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  • March 24, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • May 5, 2016, 3:52 p.m.

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IMRICH, KENNETH. Electrical Discharge Machining Techniques for Evaluating the Effects of Tritium on Materials, report, March 24, 2004; South Carolina. (digital.library.unt.edu/ark:/67531/metadc777206/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.