Environmental health and safety independent investigation of the in situ vitrification melt expulsion at the Oak Ridge National Laboratory, Oak Ridge, Tennessee

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At about 6:12 pm, EDT on April 21, 1996, steam and molten material were expelled from Pit 1 in situ vitrification (ISV) project at the Oak Ridge National Laboratory (ORNL). At the request of the director of the Environmental Restoration (ER) Division, Department of Energy Oak Ridge Operations (DOE ORO), an independent investigation team was established on April 26, 1996. This team was tasked to determine the facts related to the ORNL Pit 1 melt expulsion event (MEE) in the areas of environment safety and health concerns such as the adequacy of the ISV safety systems; operational control restrictions; emergency ... continued below

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48 p.

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Creator: Unknown. July 1, 1996.

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Description

At about 6:12 pm, EDT on April 21, 1996, steam and molten material were expelled from Pit 1 in situ vitrification (ISV) project at the Oak Ridge National Laboratory (ORNL). At the request of the director of the Environmental Restoration (ER) Division, Department of Energy Oak Ridge Operations (DOE ORO), an independent investigation team was established on April 26, 1996. This team was tasked to determine the facts related to the ORNL Pit 1 melt expulsion event (MEE) in the areas of environment safety and health concerns such as the adequacy of the ISV safety systems; operational control restrictions; emergency response planning/execution; and readiness review, and report the investigation team findings within 45 days from the date of incident. These requirements were stated in the letter of appointment presented in Appendix A of this report. This investigation did not address the physical causes of the MEE. A separate investigation was conducted by ISV project personnel to determine the causes of the melt expulsion and the extent of the effects of this phenomenon. In response to this event, occurrence report ORO-LMES-X10ENVRES-1996-0006 (Appendix B) was filed. The investigation team did not address the occurrence reporting or event notification process. The project personnel (project team) examined the physical evidence at Pit 1 ISV site (e.g., the ejected melt material and the ISV hood), reviewed documents such as the site- specific health and safety plan (HASP), and interviewed personnel involved in the event and/or the project. A listing of the personnel interviewed and evidence reviewed is provided in Appendix C.

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48 p.

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INIS; OSTI as DE96012748

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  • Other Information: PBD: Jul 1996

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  • Other: DE96012748
  • Report No.: ORNL/ER--371
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/368382 | External Link
  • Office of Scientific & Technical Information Report Number: 368382
  • Archival Resource Key: ark:/67531/metadc687782

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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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  • July 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 19, 2016, 1:14 p.m.

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Environmental health and safety independent investigation of the in situ vitrification melt expulsion at the Oak Ridge National Laboratory, Oak Ridge, Tennessee, report, July 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc687782/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.