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An Analysis Of A Spent Fuel Transportation Cask Under Severe Accident Conditions

An Analysis Of A Spent Fuel Transportation Cask Under Severe Accident Conditions. Christopher S. Bajwa Spent Fuel Project Office Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Finite Element Modeling Continuous Improvement Workshop May 23, 2002

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An Analysis Of A Spent Fuel Transportation Cask Under Severe Accident Conditions

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  1. An Analysis Of A Spent Fuel Transportation Cask Under Severe Accident Conditions Christopher S. Bajwa Spent Fuel Project Office Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Finite Element Modeling Continuous Improvement Workshop May 23, 2002 Greenbelt, MD

  2. Introduction • Baltimore Tunnel Fire • Spent Fuel Transportation Cask • Preliminary Results • Conclusions and Future Work 2

  3. Baltimore Tunnel fire • July 18th, 2001 • Howard Street Tunnel • CSX Freight Train • Derailment and Fire • Tripropylene 3

  4. Spent Fuel Transportation Cask • 10 CFR 71.73 Fire Accident • Cask Performance • Finite Element (ANSYS®) Model 4

  5. Spent Fuel Transportation Cask

  6. ANSYS® Model

  7. ANSYS® Model Mesh

  8. Boundary Conditions • Heat Transfer Mechanisms • Initial Conditions • Fire conditions 8

  9. Normal Condition Temperature Profile

  10. 8 Hour Fire Temperature Profile

  11. Cask Component Time vs.Temperature Plot

  12. 8 Hour Fire with 20 Hour Cooldown

  13. Preliminary Results • Fuel Cladding Temperature Limits • Conservative Assumptions 13

  14. Conclusions and Future Work • Cask Performance • Refined Cask Model • Model Tunnel and Railcar • NIST Tunnel Fire Model • Revise Boundary Conditions 14

  15. Refined Cask Model

  16. Acknowledgements • Mr. Thomas E. Michener • Ms. Judith M. Cuta • Mr. Harold E. Adkins, Jr. Pacific Northwest National Labs 16

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