ML20052A320

LER 82-004/01T-0:on 820226,nondestructive Testing of HPI Nozzles Revealed 3A2 Thermal Sleeve Displaced & Cracks in Inside Diameter of Piping & Safe End.Caused by Thermal Fatigue Due to Loose Thermal Sleeve.Piping Replaced

ML20052A320
Person / Time
Site:	Oconee
Issue date:	04/09/1982
From:	Kutzer J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20052A315	List: ML20052A314 ML20052A320
References
LER-82-004-01T-01, LER-82-4-1T-1, NUDOCS 8204280196
Download: ML20052A320 (1)

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Evawr cascairnuN ANo enosASLR CONSEcuENCES to p lNon-destructive tes. ting of the HP1 ozzle areas revealed that the 3A2 thermal ,

g tsleeve was displaced and that there were cracks in the ID of the piping and safe ,

, , ,end. The'3B1 radiographs indicated a partial radial gap between the thermal g isleeve and safe end. This piping is expected to leak before breaking.' Arupturg

,, ,in this line would be classified as a small break LOCA, an accident for which g lFSAR analys~is shows that the plant could be safely shut down. Thus, the. health ,

pit;n land safety of the publi.: were not affected.

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, i"ie P;ie ("W'ar .,el m IThe apparent cause of the cracking in the 3A2 safe end and piping appears to be ,

g , thermal fatigue resulting from a loose thermal sleeve. The 3A2 cracked piping,

, isafe end, and thermal sleeve were replaced. The 3B1 thermal sleeve was hard roll I

g texpanded to return the thermal sleeve to its intended condition.

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