05000277/LER-1979-025-01, /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

/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: 05000277/LER-1979-025, Forwards LER 79-025/01T-0 05000277/LER-1979-025-01, /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
References
LER-79-025-01T, LER-79-25-1T, NUDOCS 7906110174
Download: ML19289F552 (1)

LER-1979-025, /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

Event date:
Report date:
2771979025R01 - NRC Website

text

NRCF RM 366 el i U. S. NUDE AR HEGULATOH V COMMISSION

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_U. Sit 2 LICENSEE EVENT REPORT Report No.

2-79-25/1T-o CONTROL BLOCK:

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UCENSEE CODE 14 16 UCENSE NUMSEs 25 26 LICE NSE TYPE JQ 57 CAI 58 CON'T LO. lJj ' N"c,"E l L l@ 0 l 5 l 01 - l Ol2 17 7l@lO!$lil8 7l9}@l0 6l0 hl7l9l@

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8 60 61 DOCKET NUMBER 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

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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.

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- l Safety SignificanCo is ntnimi due to the Bhort period of time involVCd

'" and because it in a permitted degraded condition.

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7 8 9 80 SYSTEM

CAUSE

CAUSE COMP.

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CODE CODE SUSCODE COMPONENT CODE SU9 CODE SUBCODE [oj9]

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9 10 11 12 13 18 19 20

,_ EVENT YEAR REPORT NO.

CODE TYPE NO.

SEQUE N TI AL OCCUR RE NCE REPORT REVISION

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ACT ON ON PL NT MET WOURS SUB iT D

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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

operability. No similar proble:ro vero found on the remaining diocels.

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1 8 9 80 ST S

% POWER OTHER STATUS DISCOV R DISCOVERY DESCRIPTION [Gj@ l 0 l 0 l O l@l Unit 3 at 91%

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s 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@

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8 9 10 11 44 45 80 PERSONNEL FXPOSURES NUMBER TYPF

DESCRIPTION

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8 9 to 68 69 80 ;

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