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Forwards SER based on audit for verification of resolution of IE Bulletin 79-27 concerns.Requests results of evaluation & plans for testing automatic bus transfer switches within 60 days of ltr receipt.

Accession Number: ML20247E679

Date Released: Thursday, September 17, 2020

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• ML20247E674 - Forwards SER based on audit for verification of resolution of IE Bulletin 79-27 concerns.Requests results of evaluation & plans for testing automatic bus transfer switches within 60 days of ltr receipt. (2 page(s), 9/5/1989)
• ML20247E690 - Safety evaluation of audit of facility design for resolution of IE Bulletin 79-27 re loss of non-Class IE instrumentation & control power sys bus during operation.Preventive maint & testing program should be developed for bus power sources. (12 page(s), 9/5/1989)