ML20052H695

LER 82-007/01T-0:on 820428,during Final Reactor Bldg Insp, One Vertical Tendon in Secondary Shield Wall Was Found Broken.Caused by Stress Corrosion of post-tensioning Wires Near Stressing Washers Due to Water

ML20052H695
Person / Time
Site:	Oconee
Issue date:	05/12/1982
From:	Kutzer J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20052H689	List: ML20052H688 ML20052H695
References
LER-82-007-01T, LER-82-7-1T, NUDOCS 8205210347
Download: ML20052H695 (1)

Text

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EVENT QEscDWDON ANO PmosAELE CoNsECUENCES O'o o l_On April 28, 1982,.during the final Reactor Building inspection, oac vertical [

, tendon in the secondary shield wall was found broken. Subsequent detailed

, , ,inspectio'n of Units 2 and 3 found one additional failed tendon in Unit 2 and ,

[TTT1 I some rusted vertical tendons in Units 2 and 3. The primary structural integrity; o e lof the wall system and its abilftv to nerform its deslen function are consideredt o , lto be intact; thus, this event did not have a significant effect on the health 9 l

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,The apparent cause of this occu encewasstresscorrosionofthepost-tensioning g l wires near the stressing washers caused by water in the bottom of the vertical ,

g [ tendon sheaths. Defective tendons will be replaced and bottom grease caps ,

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