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Forwards engineering evaluation rept on causes for frequent automatic isolation of BWR RWCU sys & safety significance of events.Study encompassed events reported between Jan 1984 - Oct 1986 in LERs & NRC daily repts.

Accession Number: ML20206B554

Date Released: Tuesday, October 29, 2024

Package Contents

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• ML20206B547 - Forwards engineering evaluation rept on causes for frequent automatic isolation of BWR RWCU sys & safety significance of events.Study encompassed events reported between Jan 1984 - Oct 1986 in LERs & NRC daily repts. (2 page(s), 3/27/1987)
• ML20206B555 - Forwards AEOD engineering evaluation rept on operational experience re BWR RWCU sys.Study based on LERs submitted during Jan 1984 - Oct 1986 & NRC daily repts.Reevaluation of daily surveillance testing suggested. (3 page(s), 3/31/1987)
• ML20206B558 - Forwards engineering evaluation rept re RWCU sys automatic isolation events & safety significance of operational problems.Potential improvements include hardware changes & procedural mods. (2 page(s), 3/31/1987)
• ML20206B576 - Forwards engineering evaluation rept on causes for frequent automatic isolations of BWR RWCU sys & safety significance of events.Study based of LERs & NRC daily repts issued during Jan 1984 - Oct 1986. (2 page(s), 3/27/1987)
• ML20206B597 - "RWCU Sys Automatic Isolation & Safety Considerations." (35 page(s), 3/31/1987)