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Forwards "...Engineering Analysis & Root Cause Evaluation" & proprietary "Status Rept on...Cracking of Inconel-600 Penetrations," per crack which developed in pressurizer PORV nozzle safe end at plant on 930916.Status rept withheld.

Accession Number: ML18059A421

Date Released: Wednesday, October 31, 2018

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• ML18059A420 - Forwards "...Engineering Analysis & Root Cause Evaluation" & proprietary "Status Rept on...Cracking of Inconel-600 Penetrations," per crack which developed in pressurizer PORV nozzle safe end at plant on 930916.Status rept withheld. (1 page(s), 10/7/1993)
• ML18059A422 - "Pressurizer Safe End Crack Engineering Analysis & Root Cause Evaluation." (25 page(s), 10/7/1993)
• ML18059A423 - Rev 0 to "Palisades Plant Pressurizer Safe End Crack Repair Action Plan." (14 page(s), 10/7/1993)
• ML18059A424 - "Correlation Between Yield Strength & Time to PWSCC for Alloy 600," presented at 1992 EPRI workshop on PWSCC of Alloy 600 in PWRs in Orlando,FL on 921201-03. (16 page(s), 12/1/1992)
• ML18059A425 - Forwards proprietary Topical Rept CEN-406-P, "Status Rept on CEOG Activities Concerning Primary Water Stress Corrosion Cracking of Inconel-600 Penetrations." Rept withheld,per 10CFR2.790. (2 page(s), 5/31/1991)