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Clarifies 851024 response to NRC request for study of jet impingement effects in break exclusion area of main steam & feedwater piping.Encl NRC 770606 ltr & safety evaluation cited to support claim that study lacks justification.

Accession Number: ML20140B735

Date Released: Tuesday, June 2, 2020

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• ML20140B734 - Clarifies 851024 response to NRC request for study of jet impingement effects in break exclusion area of main steam & feedwater piping.Encl NRC 770606 ltr & safety evaluation cited to support claim that study lacks justification. (3 page(s), 1/20/1986)
• ML20140B760 - Approves protection against postulated pipe breaks outside containment,per "Dynamic Effects of Postulated Pipe Failures Outside Containment - South Texas Projects 1 & 2 " & addl responses.Safety evaluation encl. (1 page(s), 6/6/1977)
• ML20140B799 - Safety evaluation supporting subcompartment pressure analysis & proposed valve room design,per low stress superpipe requirements of Branch Technical Position MEB 3-1 re protection against main steam or feedwater line breaks. (2 page(s), 6/6/1977)