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Forwards safety assessments provided by PWR Owners Groups to address Alloy 600 CRDM/CEDM vessel head penetration cracking issue.Notifies that encl B&W assessment proprietary.B&W assessment withheld.

Accession Number: ML19303F638

Date Released: Friday, October 25, 2024

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• ML20056C401 - Forwards safety assessments provided by PWR Owners Groups to address Alloy 600 CRDM/CEDM vessel head penetration cracking issue.Notifies that encl B&W assessment proprietary.B&W assessment withheld. (1 page(s), 6/16/1993)
• ML20056C402 - "Safety Evaluation of Potential for & Consequence of Reactor Vessel Head Penetration Alloy 600 ID Initiated Nozzle Cracking." (55 page(s), 5/31/1993)
• ML20056C403 - Requests that proprietary Rept BAW-10190P, "Safety Evaluation for B&W-Design Reactor Vessel Head Control Rod Drive Mechanism Nozzle Cracking" be withheld,per 10CFR2.790. (7 page(s), 5/26/1993)