A human reliability analysis of a nuclear explosives dismantlement

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This paper describes the methodology used in a human reliability analysis (HRA) conducted during a quantitative hazard assessment of a nuclear weapon disassembly process performed at the Pantex plant. The probability of human errors during the disassembly process is an extremely important aspect of estimating accident-sequence frequency for nuclear weapons processing. The methods include the systematic identification of potential human-initiated or enabled accident sequences using an accident-sequence fault tree, the extensive use of walkthroughs and videotaping of the disassembly process, and hands-on testing of postulated human errors. THERP modeling of rule-based behavior and operational data analysis of errors in skill-based ... continued below

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11 p.

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Bott, T.F. July 1, 1995.

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Description

This paper describes the methodology used in a human reliability analysis (HRA) conducted during a quantitative hazard assessment of a nuclear weapon disassembly process performed at the Pantex plant. The probability of human errors during the disassembly process is an extremely important aspect of estimating accident-sequence frequency for nuclear weapons processing. The methods include the systematic identification of potential human-initiated or enabled accident sequences using an accident-sequence fault tree, the extensive use of walkthroughs and videotaping of the disassembly process, and hands-on testing of postulated human errors. THERP modeling of rule-based behavior and operational data analysis of errors in skill-based behavior are described. A simple method for evaluating the approximate likelihood of nonmalevolent violations of procedures was developed and used to examine the process. The HRA occurred concurrently with process design, so considerable interaction between the analysts and designers occurred and resulted in design changes that are discussed in the paper.

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11 p.

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OSTI as DE95014004

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  • 1995 International mechanical engineering congress and exhibition, San Francisco, CA (United States), 12-17 Nov 1995

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  • Other: DE95014004
  • Report No.: LA-UR--95-1775
  • Report No.: CONF-951135--8
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 100095
  • Archival Resource Key: ark:/67531/metadc626811

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Office of Scientific & Technical Information Technical Reports

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  • July 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 25, 2016, 7:18 p.m.

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Bott, T.F. A human reliability analysis of a nuclear explosives dismantlement, article, July 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc626811/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.