Rob started by reviewing the history behind this analysis. Rob was not able to find a reference for the basis of PWR correlations developed in NUREG-1150. The BWR correlations were extracted from GE NEDO studies performed in the early 1980’s. New correlations have been based on several closed-form solutions appropriate for BWR steam and liquid lines and PWRs.

Rob still needs to add a column correlating the pipe diameter to the leak rate/area in slides 8 of 9 of this presentation. It was agreed that the pipe diameter should assume a single ended guillotine break. Rob also agreed to change the word “axial” to “transverse” on slide 9 of the original presentation which relates the pipe fracture area to transverse piping displacement. Gery Wilkowski noted that once a full DEGB occurs that the two ends of the pipe are jets that move away from each other so that he would be hesitant to use the analysis on slide 9 which assumes a transverse displacement. The base case team members will update their results using the new pipe break size to leak rate correlations developed for this presentation.