Evaluation of potential and consequences of steam bump in high heat waste tanks and assessment and validation of GOTH computer code

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This report describes the thermal hydraulic analysis performed using the GOTH computer code to evaluate the potential and consequences of steam bumps in high heat waste tanks. The analysis was performed for three different sludge volumes that correspond to the current sludge volume in tank AZ-101, combined sludge volumes of tank AZ-101 and tank AZ-102 and the projected consolidated sludge volume of tank C-106 and tank AY-102. For each case, the steam bump potential was evaluated starting the simulation with a realistic best estimate initial temperature distribution as well as with a conservative potentially possible axial temperature distribution in the ... continued below

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222 p.

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Sathyanarayana, K. July 15, 1996.

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  • Westinghouse Hanford Company
    Publisher Info: Westinghouse Hanford Co., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

This report describes the thermal hydraulic analysis performed using the GOTH computer code to evaluate the potential and consequences of steam bumps in high heat waste tanks. The analysis was performed for three different sludge volumes that correspond to the current sludge volume in tank AZ-101, combined sludge volumes of tank AZ-101 and tank AZ-102 and the projected consolidated sludge volume of tank C-106 and tank AY-102. For each case, the steam bump potential was evaluated starting the simulation with a realistic best estimate initial temperature distribution as well as with a conservative potentially possible axial temperature distribution in the sludge. To include further conservatism in estimating the consequent release of radioactive material, steam bump analyses were also performed suppressing steam condensation with subcooled liquid in waste. In addition,calculations were performed with in leakage flow paths corresponding to open risers and pump and sluice pit cover blocks as well as with normal in leakage flow paths due to drain pipes and infiltration paths. Therefore, the report presents the steam bump evaluations encompassing from an extremely conservative case of initiating a steam bump with local saturation temperature throughout the sludge with condensation suppressed and open risers to a realistic potential case with loss of cooling of initiating at steam bump with only the bottom layer with local saturation temperature with condensation included considering only the normal in leakage flow paths. The results show that in all cases the consequences from an energetic bump may not be acceptable, and the safe operation should include keeping peak sludge temperatures below local saturation values. The report also includes a brief description of the capability and validation of models used in the GOTH computer code.

Physical Description

222 p.

Notes

OSTI as DE98057396

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  • Other Information: PBD: 15 Jul 1996

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  • Other: DE98057396
  • Report No.: WHC-SD-WM-CN--022
  • Grant Number: AC06-96RL13200
  • DOI: 10.2172/663153 | External Link
  • Office of Scientific & Technical Information Report Number: 663153
  • Archival Resource Key: ark:/67531/metadc706472

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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 15, 1996

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • June 14, 2016, 3:09 p.m.

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Sathyanarayana, K. Evaluation of potential and consequences of steam bump in high heat waste tanks and assessment and validation of GOTH computer code, report, July 15, 1996; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc706472/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.