ML20003B104

LER 81-003/01T-0:on 810113,during Surveillance Test W/Unit at Full Power,Oil Leak of Approx 3-5 Gallons Per Minute Discovered on Oil Supply Line to HPCI Turbine Manual/ Overspeed Trip Mechanism.Caused by Ruptured Diaphragm

ML20003B104
Person / Time
Site:	Peach Bottom
Issue date:	01/27/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003B097	List: ML20003B096 ML20003B104
References
LER-81-003-01T, LER-81-3-1T, NUDOCS 8102100355
Download: ML20003B104 (1)

Text

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EVENT DESCRIPTION AND PRO 8ABLE CONSEQUENCES h Io !aI l During a Surveillance Test with the unit at full power, an oil leak of I f o lai I about 3 to 5 GPM was discovered on the oil supply line to the HPCI l l o 14 I I turbine manual /overspeed trip mechanism. If HPCI turbine had started l og5l l with oil leaking from the line, oil would still have been supplied to l l 016 l l the bearings for about 30 minutes at reduced pressure. At that coint a l jol7ll turbine bearing low pressure alarm would have been received. Remaining l t o is i i ECCS systems were immediately verified to be operable. I

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[3J,Ajgl34Z l g l5Z lg 3 lMZ l@ 37 l0l0l0l l 40 lY [g lY ig el 42 lAl@ l R l 2 l 9 l 0 lg 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h gg oj l The cause was determined to be a ruptured diaphragm on the Robertshaw l i ii l l oil pressure control valve Model VC-210. A new diaphracm was installed I

, ,,, j in the valve and the system satisfactorily tested and returned to l

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