ML20038B193

LER 81-016/01T-0:on 810918,steam Generator Tube Leak of Approx 0.03 Gpm & Increasing to 25-30 Gpm,Indicated by Monitor.Apparently Caused by Circumferential Crack of Tube 77-2 at 15th Support Plate.Tube Stabilized & Plugged

ML20038B193
Person / Time
Site:	Oconee
Issue date:	11/13/1981
From:	Kutzer J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20038B191	List: ML20038B190 ML20038B193
References
LER-81-016-01T-01, LER-81-16-1T-1, NUDOCS 8111240845
Download: ML20038B193 (1)

Text

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EVENT :ESCRimCN ANQ PACE Add OCes3ECUENCES h 12 2 lon September 18, 1981, a steam generator tube leak of approximately 0.03 GPM g t 3 . ., . t was indicated by the Condensate Steam Air Ejector Offgas Radiation Monitor, i

31., Iwhich increased to 25 to 30 GPM later that day. This constitutes aa abnormal

,,,,, g degradation in the reactor coolant pressure boundary and is reportable pursuan ro i , I to Technical Specification 6.6.2.1.a(3) . Persontiel and systems adequately con 9

,,,,,9 trolled this event and the releases were well within the regulatory require-

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ti.oi!The apparent cause of the steam generator tube leak was a circumferential crack

,,,,,;of Tube 77-2 at the 15th support plate. The unit was shut down, cooled down, ,

,,,,,jand the reactor coolant loops drained to s*op the leak. The leaking tube was !

,,, , , stabilized from the top and explosively plugged from the bottom. Eddy current,

,, ., [ testing the inspection Inne region showed no tubes unacceptably degraded.  ;

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