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Responds to FOIA request for 16 categories of documents re degradation of bolts,nuts & studs at PWRs & BWRs.Forwards App A documents.App A & B documents available in PDR.

Accession Number: ML19277C608

Date Released: Sunday, November 8, 2020

Package Contents

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• ML20080J321 - Attachment 1 to "Stress Analysis of Failed Steam Generator Manway Studs From Oconee Unit 3,Duke Power Co." (28 page(s), 4/17/1981)
• ML20080J331 - Forwards LER 80-010 & LER 81-002/01 re stud corrosion. (1 page(s), 5/15/1981)
• ML20079Q400 - Discusses program action plan re bolting degradation or failure in nuclear power plants,proposed Generic Issue 29. Improvements in design,matls,fabrication,installation & insp recommended. (6 page(s), 4/25/1983)
• ML20080J230 - Submits daily highlights re 830608 plant shutdown due to excessive primary coolant leak rate of 0.07 gpm.Cause of leakage at manway covers undetermined.Repairs in progress. (1 page(s), 6/10/1983)
• ML20079G605 - "Threaded Fastener Experience in Nuclear Power Plants." (38 page(s), 6/30/1982)
• ML20080A038 - Summary of 830621 operating reactor events meeting re events which occurred since 830607 meeting.Attendance list encl. (6 page(s), 7/1/1983)
• ML20080J236 - Submits daily highlights re plant shutdown because of excessive primary coolant leak.Cause of leaky manway covers due to insufficient torquing of head bolts that prevented proper bottoming of bolts. (1 page(s), 6/17/1983)
• ML19277C607 - Summary of 830506 meeting w/B&W Owners Group in Bethesda,MD re issues raised by reactor vessel internal bolt failures at Rancho Seco & Crystal River. (75 page(s), 6/24/1983)
• ML20080J309 - "Metallurgical,Stress & Fracture Mechanics Analyses of Cracked Steam Generator Manway Studs From Oconee Unit 3 of Duke Power Co." (16 page(s), 4/17/1981)
• ML20079F148 - Discusses bolt failures in nuclear power plants. Investigative program recommended. (1 page(s), 10/20/1981)