Revised cost savings estimate with uncertainty for enhanced sludge washing of underground storage tank waste

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Enhanced Sludge Washing (ESW) has been selected to reduce the amount of sludge-based underground storage tank (UST) high-level waste at the Hanford site. During the past several years, studies have been conducted to determine the cost savings derived from the implementation of ESW. The tank waste inventory and ESW performance continues to be revised as characterization and development efforts advance. This study provides a new cost savings estimate based upon the most recent inventory and ESW performance revisions, and includes an estimate of the associated cost uncertainty. Whereas the author`s previous cost savings estimates for ESW were compared against no ... continued below

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8 p.

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DeMuth, S. September 1, 1998.

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Description

Enhanced Sludge Washing (ESW) has been selected to reduce the amount of sludge-based underground storage tank (UST) high-level waste at the Hanford site. During the past several years, studies have been conducted to determine the cost savings derived from the implementation of ESW. The tank waste inventory and ESW performance continues to be revised as characterization and development efforts advance. This study provides a new cost savings estimate based upon the most recent inventory and ESW performance revisions, and includes an estimate of the associated cost uncertainty. Whereas the author`s previous cost savings estimates for ESW were compared against no sludge washing, this study assumes the baseline to be simple water washing which more accurately reflects the retrieval activity along. The revised ESW cost savings estimate for all UST waste at Hanford is $6.1 B {+-} $1.3 B within 95% confidence. This is based upon capital and operating cost savings, but does not include development costs. The development costs are assumed negligible since they should be at least an order of magnitude less than the savings. The overall cost savings uncertainty was derived from process performance uncertainties and baseline remediation cost uncertainties, as determined by the author`s engineering judgment.

Physical Description

8 p.

Notes

INIS; OSTI as DE99002496

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  • Other Information: PBD: 1 Sep 1998

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  • Other: DE99002496
  • Report No.: LA-UR--98-3929
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/348879 | External Link
  • Office of Scientific & Technical Information Report Number: 348879
  • Archival Resource Key: ark:/67531/metadc680537

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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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  • September 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • June 14, 2016, 6:08 p.m.

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DeMuth, S. Revised cost savings estimate with uncertainty for enhanced sludge washing of underground storage tank waste, report, September 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc680537/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.