The report describes the results of a series of studies conducted to investigate the behavior of core debris within a BWR Mark II containment. The studies focused on the interaction of core debris with concrete and steel structures (downcomers and in-pedestal floor drains) within the drywell, the transport of debris through these drains and downcomers into the wetwell, and on debris-water reactions within the wetwell. Estimates of the conditions under which debris would penetrate the inpedestal drain lines, the time-dependent behavior of the debris within the drain lines, and the amount of debris which might enter the suppression pool via these drain lines are provided. An assessment of the conditions under which the upper lip of the downcomers would be expected to fail (i.e. melt) due to exposure to hot core debris is presented. Finally, the unique characteristics of debris water interactions in Mark II containments are discussed, the existing knowledge base regarding core-concrete debris-water interactions is summarized, and an evaluation of the applicability of the MELCOR 1.8.0 code's debris-water interaction model to BWR Mark II's is presented.
BWR Mark II Ex-Vessel Corium Interaction Analyses
1991
240 pages
Report
No indication
English
Radiation Shielding, Protection, & Safety , Reactor Engineering & Nuclear Power Plants , Selected Studies In Nuclear Technology , Containment systems , Corium , Concretes , Steels , Reactor materials , Molten metal-water reactions , Nuclear reactor accidents , Fission products , Drains , Computerized simulation , BWR type reactors , Autohydrolysis , Fuel-coolant interactions , Time dependence , Melcor computer code , Mark II containment , Downcomers , Wetwells
Coolability of coarse corium debris beds
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