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Interim Deficiency Rept 8 re reactor vessel broken anchor bolts,initially reported on 791012.Encl repts establish that root cause for excessive hardness was tempering of some studs at lower than min temp.Addl rept to be sent by 810724.

Accession Number: ML19345G578

Date Released: Wednesday, December 25, 2019

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• ML19345G577 - Interim Deficiency Rept 8 re reactor vessel broken anchor bolts,initially reported on 791012.Encl repts establish that root cause for excessive hardness was tempering of some studs at lower than min temp.Addl rept to be sent by 810724. (2 page(s), 3/31/1981)
• ML19345G580 - "Continued Investigation of Failure of Midland Unit 1 RPV Anchor Studs," data rept. (57 page(s), 2/11/1981)
• ML19345G581 - "Continued Investigation of Failure of Midland Unit 1 RPV Anchor Studs," analysis rept. (27 page(s), 2/11/1981)