ML19289F552

LER 79-025/01T-0 on 790518:E-2 Diesel Tripped Causing half-scram & half-isolation on Unit 3.Caused by Loss of Control Oil from Diesel Governor.Cracked Pipe Fitting Was Replaced

ML19289F552
Person / Time
Site:	Peach Bottom
Issue date:	06/04/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289F550	List: ML19289F549 ML19289F552
References
LER-79-025-01T, LER-79-25-1T, NUDOCS 7906110174
Download: ML19289F552 (1)

Text

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LICENSEE EVENT REPORT Report No. 2-79-25/1T-o CONTROL BLOCK: l l l l l (FLEASE PRINT OR TYPE ALL REQUf RED INFORMATION)

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68 69 EVENT DATE J4 75 REPORT DATE 80

. EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 1TTTI-1-' Vith one off eito pdkor cource out of service for maintenanco and the -

I lo jal l E-2 diesel Erupplying loads on the E-23 emergency bus, the E-2 diecel j t

o 4 tripped causing a half scram and half isolation on Unit 3. The E-23 bue o s l van 11:nodiately recnorgized from the remining off alte power courco and l lo is l l the cocond off sito power cource was promptly returned to service. l 0 7 -l Safety SignificanCo is ntnimi due to the Bhort period of time involVCd o 8 '" and because it in a permitted degraded condition. ]

7 8 9 80 g SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SU9 CODE SUBCODE

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43 44 4; e 'CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o l Ioss of control oil from the diesol governor caused th C mc:1 to trip. l l l 3 1- l Oil was lost throu6h a oracked pipo fitting on the govemor Laounter l

, 7 l outlet port. The fitting was replaced nnd tho diocol was tected for l i 3 operability. No similar proble:ro vero found on the remaining diocels. l 11 14I l 1 8 9 80 ST S  % POWER OTHER STATUS DISCOV R DISCOVERY DESCRIPTION i s [Gj@ l 0 l 0 l O l@l Unit 3 at 91% l l A l@l liienel trippei ACTlVITY CO TENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOC ATION OF RE LE ASE l i l 6 l [.z_j @ l z l@ N/A l U/A 1 8 9 10 11 44 45 80 PERSONNEL FXPOSURES NUMBER TYPF DESCRIPTION i 7

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M. J. Cooney _ , , , (215) 841-5020 g