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Potential Benefits of the New Westinghouse LOCA Mass and Energy Release Methodology: Estimated Reduction in the Initial Ice Mass Required for an Ice Condenser Containment

[+] Author Affiliations
Richard P. Ofstun

Westinghouse Electric Company, LLC, Monroeville, PA

Thomas F. Antolic

Virginia Tech University, Blacksburg, VA

Paper No. ICONE16-48621, pp. 679-682; 4 pages
  • 16th International Conference on Nuclear Engineering
  • Volume 3: Thermal Hydraulics; Instrumentation and Controls
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4816-7 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME


Westinghouse has developed a new loss of coolant accident (LOCA) mass and energy (M&E) release methodology using the W COBRA/TRAC (W C/T) and GOTHIC computer codes. The new method replaces the deterministic post-blowdown steam generator and metal energy release models with a mechanistic calculation that results in significantly lower steam generator and metal energy release rates. As shown in Reference 1, these lower energy release rates result in a significantly lower post-blowdown containment pressure and temperature for the large dry containment design. This paper estimates the impact of the lower calculated post-blowdown energy release rates on the initial ice mass required to be loaded into an ice condenser containment.

Copyright © 2008 by ASME



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