05000278/LER-1981-003-01, /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

/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: 05000278/LER-1981-003, Forwards LER 81-003/01T-0 05000278/LER-1981-003-01, /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
References
LER-81-003-01T, LER-81-3-1T, NUDOCS 8102100355
Download: ML20003B104 (1)

LER-1981-003, /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

Event date:
Report date:
2781981003R01 - NRC Website

text

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60 68 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPQRT DATE 80 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.

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EVENT YEAR REPORT No.

CODE TYPE NG.

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37 40 el 42 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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DESCRIPTION

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