05000280/LER-1979-044-03, /03L-0:on 791230,during Cold Shutdown,Emergency Diesel Generator 3 Started for Operability Test.Noise Detected in Turbocharger.Cause Under Investigation. Turbocharger Replaced & Returned to Reconditioning

/03L-0:on 791230,during Cold Shutdown,Emergency Diesel Generator 3 Started for Operability Test.Noise Detected in Turbocharger.Cause Under Investigation. Turbocharger Replaced & Returned to Reconditioning

ML18136A398
Person / Time
Site:	Surry
Issue date:	01/17/1980
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18136A397	List: 05000280/LER-1979-044, Forwards LER 79-044/03L-0 05000280/LER-1979-044-03, /03L-0:on 791230,during Cold Shutdown,Emergency Diesel Generator 3 Started for Operability Test.Noise Detected in Turbocharger.Cause Under Investigation. Turbocharger Replaced & Returned to Reconditioning
References
LER-79-044-03L, LER-79-44-3L, NUDOCS 8001210211
Download: ML18136A398 (2)

LER-1979-044, /03L-0:on 791230,during Cold Shutdown,Emergency Diesel Generator 3 Started for Operability Test.Noise Detected in Turbocharger.Cause Under Investigation. Turbocharger Replaced & Returned to Reconditioning

Event date:
Report date:
2801979044R03 - NRC Website

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NRC FORM 366 (7_-77)' _L- _____ --

U.S. NUCLEAR REGULATORY COMMISSION

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CON'T [fE]

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- LICENSEE EVENT REPORT e

CONTROL BLOCK: I 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

I VI A I s I p I s I 1 101 0 IO I - I O IO IO IO IO I-IO IO 1014 Ii Ii Ii I 1 101 I I© 9

LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58

~:~~~ Li©I o I 5 I o I o Io 1 2 I s I o 101 11 60 61 DOCKET NUMBER 68 69 21 3 I o I 71 9 IG) I o I 1 I 1 I B I s I o 10 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

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I With both units at cold shutdown, #3.EDG was started for an aperabi J i ty cbeck A loud I

. [EJ:IJ I noise. was detected in the vicinity of the turbo-charger.

The engine *was im:nediateJy

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[£li] I shutdown.

A failure of a part in the turbo-charger is the suspected cause The

!III] I time of the possible failure cannot be determined and may have occurred prior to

!In] I Unit #1 being brought to a cold slrutdoli'ln condition and is therefore reported in

~- !*accordance with Technical Specification 6*.6.2;b,{2).

'!he health-and safety af the

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SYSTEM CODE I EIE I@

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44 47 j The tu..-bo-charger was renlaced and the defective unit returned to EMO for recondjt jqn-I ITD] I ing.

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e Attachnent, page 1 Surry Power Docket No:

Station, Unit 1 50-280 79-044/03L-O 12-30-79 Report No:

Event Date:

1. Description of Event

Both units were at cold shutdown.

Repair work had been carpleted on #3 emergency diesel generator air starting system.

The engine was started in preparation for an operability check. With the engine idling at 400 RfM, a loud screeching type noise was detected in the vicinity of the turbo-charger.

The engine was imnediately stopped.

The exact source of the noise has not been determined but a possible failure of sane part in the turbo-charger is suspected.

'lhe time of the failure of the turbo-charger part can not be exactly determined arid the possibility exists that the failure occurred prior to Unit *#1 being brought to a cold shutdown condition.

It is therefore reported in accordance with Technic*al Specification 6. 6.2.b. (2) ~

2 *. Probable Consequences of Occurrence

3.

4.

The redundant EDCrwas operational, therefore the health and safety of the public were not affected.

Cause

The turbo-charger has been replaced on the engine.

It will be returned to Electro-1\\/btive Division of General rvt>tors for inspection to determine

• • if a failure exists a.i-1d the cause.

In addition, a crack was found in the exhaust 1 ine flexible coupling 1 iner. Escaping gas could have caused the loud screeching sound.

IE Circular 79-12 has been reviewed but is not applicable in this event since the RLergency Diesel Generator was not subject to hot-fast starts.

Irrmediate Correc~ive Action Toe ir::rrediate cc!Tec.tive action is to replace the turbo-charger.

The

~.,-.7acturer's manual specifically states that it is not practical to

~~~~rpt zrry ~---epai...--r-s in the field and the turbo-chargers should be re~,*.,:ed to EY.!D for reconditioning.

The liner crack was welded to rs::~,::,.1 !.r"le fl.av fble coupling.

s*... S~....nt Corrective Action fu.i:; subsecy..:1°,,1.t co:rrective action will be determined by the results of the i~ction by E\\iID.

6.

Actions Ta.."i:ren to Prevent Recurrence This again will be determined by the results of the inspection by BVID.

7. Gener-ic Irrplcations None are lmown at this time.