ML20062L528

RO 81-003/01P-0:on 810113,leak Discovered on Oil Supply Line to Turbine Manual/Overspeed Trip Mechanism of HPCI Auxiliary Oil Pump.Probable Cause Due to Leaking Valve or Fitting in Supply Line.Investigation Underway

ML20062L528
Person / Time
Site:	Peach Bottom
Issue date:	01/13/1981
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8102020415
Download: ML20062L528 (3)

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Region 1 United .3,.n a.; Uuelear Begulatory *;c=.r:ission

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'*on fir sing Ts . 5. Fielsehr.nnn's conversa .!cn with C. Ocvgill , ilegion I .1.ci erte Regulatery .J::. mission. Offire of Inspection and Enfercement of January 13, l')91 in reopense to I. E. Bulletin 60-17.

Reference:

Cocket No. 50-278  ;;N Feach Botton Unit 3 ' ' ,1 W s /

I. E. Bulletin 80-17 Technical Specification 3 5.c.1 s g' i s.g M,}{

Rcport No. 3-81-03/IP , 0. { J AN '30'1981 > ECl Occurrence Date: January 13, 1981 (,.i ,,,,e , g ;

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Id-:ntification of occurrence: V M/

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During a Surveillance Test of the HPCI auxiliary oil pum q s' ak of about 3 to 5 GPM was discovered on the oil supply line to the abine mar.unl/

overspeed trip mechanism.

Conditions Prior to Occurrence:

Unit 3 operating at loof power.

Apparent Cause of Occurrence:

It is believed that the oil leak is due to a leaking val're or fitting in the  !

oil supply line to the trip mechanism. l i

Analysis of Occurrence: '

The Surveillance Test did not require HPCI turbine operaticr., therefore .here ws:

no possibility of demar.e to the HPCI bearings. If the HPCI turbine hrul b r' t' n r, tarted with oil leaking from the Une, oil vould still have been supplie.i .u the bearings for about thirty minutes at reduced pressure. At that point n

turbine bearing low pressure alar.n vould have been received. Remaining ECC; ,

i cystems were ismediately verified to be operable. The' safety significance in )

l therefore :Lir.1: mal.

81020sOMs fl $h5: I

NRC F09ne34 U. S. NUCLEAR REGULATORY COMMISSION (7 77) ',

LICENSEE EVENT REPORT CONTROL BLOCK: l 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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NAME OF PREPARER PHONE: