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Forwards rev 1 to LER 97-003 re degraded back pressure dampers needed for pipe rupture mitigation resulted in operation being outside design basis.Cause & corrective action discussed.

Accession Number: ML20141C515

Date Released: Wednesday, June 3, 2020

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• ML20141C509 - Forwards rev 1 to LER 97-003 re degraded back pressure dampers needed for pipe rupture mitigation resulted in operation being outside design basis.Cause & corrective action discussed. (2 page(s), 5/12/1997)
• ML20141C517 - LER 97-003-01:on 970204,degraded back pressure dampers needed for pipe rupture mitigation resulted in operation being outside design basis.Caused by failure to include periodic cycling & cleaning of BDPs.Addl failures,corrected. (6 page(s), 5/12/1997)