ML19322E800

Part 21 Rept:On 800114,Colt Industries Reported Failure of Thrust Bearing in Diesel Generator Due to Omission of Plugs from Oil Supply Sys.Thrust Bearing & Thrust Collar Are Being Replaced & Plugs Installed

ML19322E800
Person / Time
Site:	Summer
Issue date:	03/05/1980
From:	Crews E SOUTH CAROLINA ELECTRIC & GAS CO.
To:
References
REF-PT21-80-191-003 NUDOCS 8004020292
Download: ML19322E800 (2)

Text

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ATTACHED IS A PART 21 REPORT FROM IE IMIL UNIT - ROOM 359E/W {

PART21IDENTIFICATIONNO. W -/9/-oo 3 COMPANY fWEMbY' 3 "'

DATE OF LEITER /s'/ rr o DOCKET NO. bm IKIE I)lSTRIBUTED 3//a/ r a ORIGIfML REPORT _ SUPPLB1BEARY 2 DISTRIBUTION:

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REACTOR (R)[ FUEL CYCE & __

SAFEGUARDS (S) ]

f%TERIALS(M)

NRR/ DOR,DlRECTOR AD/FRISI - AD/SG-IE IIRR/DPM DIRECTOR ff1SS/FCMS AD/ROI AD/ROI(2) REGI0'4S REGIONS AD/RCI IE FIES fiRR/ DOR,DIPECTOR PEGIONS PDR INSS/SG SS-881 IE FIES (2) LPDR PDR CBfiP/L FIES CBUPAL FIES-SS-3% LPDR CBURAL FIES (CHRON)

CBlTgAL FIES(CHRON) TEPA IE FIES (2) lfDR CBHPAL FIES 016 TEPA L0EB/FPA ti4B5715 C8HPAL FILES (CHRON)

LE/ IPA KB 57E CENTPAL FIES - SS-396 ACTION: L0EB/ IPA lHB 5715 PRELIMINARYEVUAl.ATIONOFTHEATTACHEDREPORTINDICATESLEADRESPONS FOLLGi-UP AS SH0hN BELG4:

JEB maC umE male c'GD ROI SG FFMSI REV. 2/26/80 8 0 04 0 2 0 'Aq &

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, SOUTH CdROLINA ELECTRIC a GAS COMPANY POST OFFtCE SOE 764 CotuMsiA, SOUTH CAROLINA 29218 E. H. Ca tw s. J m.

%ct Passeosov..e G.owF casevtwa c....u. . ... c......ci March 5, l'980

?o - /7/-oo a Mr. James P. O'Reilly ,

Office of Inspection and Enforcement United States Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 3100 Atlanta, Georgia 30303

Subject:

Virgil C. Summer Nuclear Station Reportable.Significant Deficiency Colt Diesel Generators Nuclear Engineering File - 3.1051

Dear Mr. O'Reilly:

On January 14, 1980 Colt Industries reported a failure of a thrust bearing in a diesel generator installed at the Virgil C. Summer Nuclear Station as a 10CFR 21 item. Under the South Carolina Electric and Gas Company program this item is considered a substantial safety hazard de-

~~ fined under 10CFR 21 and is being reported as a significant deficiency under 10CFR 50.55(e). SCE6G's initial evaluation completed on January 21,,

1980 determined this item not to be_'a substantial safety hazard. However,.

recent discussions with Region II personnel resulted in a reevaluation of this item. This item was orally reported to Mr. Jack Skolds, Resident NRC Inspector, on March 4, 1980. Detailed information of the probicm is described in Attachment 1.

Corrective action is in progress. A final report will be made when the results of Colt's evaluation of apparent successful operation of the unit during shop testing is received. If ou have any questions, please let us

• know.

V ry t- ly yours,

. . ews, Jr.

RBC:EHC:jw cc: Division of Inspection and Enforcement

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• a KTACIDENT 1

1. Name and Address of Reporting Individual Mr. Ronald B. Clary - P. O. Box 764 - Columbia, South Carolina, 29218

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2. Identification of Basic Component Crankshaf t thrust bearing on lA diesel generator.

3. Identification of Firm Supplying Component Colt Industries, Fairbanks Horse Engine Division 701 Lawton Avenue, Beloit, Wisconsin, 53511.

4. Nature of Defect, Substantial Safety Hazard Created, Evaluation Plugs were ,omitted in the oil supply system for the crankshaft thrust bearing thus causing diversion of oil from the bearing to the sump in the bearing housing. The omission of the plug .

was discovered during on site preoperational testing of the diesel unit. Since failure of the ben, ring results in failure of the diesel generator, this would 1 cave only one diesel generator available', and

., ,a substantial safety hazard could exist. Assuming a single failure in.the remaining diezel generator train the ability of the plant to safely shutdown could be affected. '

5. Date Information of Defect was Obtained The failure occurred on January 9,1980 and was . documented on a Startup Field Report the same day. Colt Industries subsequently informed the NRC of a 10CFR 21 item on January 14, 1980.'

6. Number and Location of Defects The plug omission occurred only in diesel generator lA. Diesel

. generator 1B was inspected and found to have the plugs properly installed.

7. Corrective Action The thrust bearing and thrust collar are being replaced and plugs are being installed. SCE&G is awaiting an evaluation by Colt to explain apparent successful operation of the diesel unit during factory testing prior to shipment.

8. Advise None.

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