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Notifies util of NRC concern re potential unreviewed safety question on interaction between nonsafety-grade sys & safety-grade sys.Requests answers to questions in IE Info Notice 79-22, "Qualification of Control Sys."

Accession Number: ML19254E917

Date Released: Saturday, November 7, 2020

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• ML19254E916 - Notifies util of NRC concern re potential unreviewed safety question on interaction between nonsafety-grade sys & safety-grade sys.Requests answers to questions in IE Info Notice 79-22, "Qualification of Control Sys." (2 page(s), 10/23/1979)
• ML19254E922 - Notifies util of investigation re nonsafety-grade sys possibly lacking protection from adverse environ impacting on safety-grade equipment.Main feedwater control & automatic rod control sys identified as potential problems. (2 page(s), 8/30/1979)
• ML19254E933 - RO:on 790906,Westinghouse review concluded that conditions associated w/high energy line breaks inside/outside containment & impact on nonsafety control sys may constitute unreviewed safety question. (1 page(s), 9/10/1979)