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LER 86-007-01:on 860107,two bolting studs in valve flange MOV-SI-1890B failed.Caused by intergranular stress corrosion of bolting matl.Insp conducted & stud matl replaced,as necessary.W/860331 ltr.

Accession Number: ML20141D059

Date Released: Wednesday, June 3, 2020

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• ML20141D055 - LER 86-007-01:on 860107,two bolting studs in valve flange MOV-SI-1890B failed.Caused by intergranular stress corrosion of bolting matl.Insp conducted & stud matl replaced,as necessary.W/860331 ltr. (5 page(s), 3/31/1986)
• ML20141D075 - "Surry 410 Stainless Steel Stud Cracking Analysis." (154 page(s), 3/5/1986)