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Forwards Rev 0 to SEA-CW-033, "Unit 1 4RIO CRD Bolt Defect Evaluation." Unusual ring-type pitting found on one bolt attributed to water standing in bolt hole.Effect of time in svc appears to be factor in producing pits & cracking.

Accession Number: ML17156B351

Date Released: Monday, September 18, 2017

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• ML17156B350 - Forwards Rev 0 to SEA-CW-033, "Unit 1 4RIO CRD Bolt Defect Evaluation." Unusual ring-type pitting found on one bolt attributed to water standing in bolt hole.Effect of time in svc appears to be factor in producing pits & cracking. (5 page(s), 9/18/1989)
• ML17156B352 - Rev 3 to "Unit 1 4RIO CRD Bolt Defect Evaluation." (54 page(s), 7/25/1989)