ML20011A661

Final Deficiency Rept Re Defective Diesel Engine Oil Plugs, Initially Reported 810630.Transamerica Delaval Will Perform Required Insp & Repair at Site During Unpackaging & Installation of Diesel.Also Reportable Per Part 21

ML20011A661
Person / Time
Site:	Phipps Bend
Issue date:	10/15/1981
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-81 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8110290250
Download: ML20011A661 (2)

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4 EA04 EE VALLEY AUTHORITY O

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Chestnut Street. Tower TENNESSEE II 374o1 g\\.W M ' October 15, 1981 d '

PBRD-50-554/81-10~ .f,(. _ . .

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, K .. -a Mr. James P. 0'Reilly, Director-Office of Inspection and Enforcement O

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U.S.-Nuclear. Regulatory Commissiong 87 ..![!-FI Region-II'- Suite 3100- $p s .- . . p 101'Marietta Street ~

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8 Atlanta, Georgia =30303 {,M

Dear Mr. O'Reilly:

PHIPPS BEND NUCLEAR PLANT UNIT 2 - REPORTABLE DEFICIENCY - DIESEL ENGINE OIL PLUGS - PBRD-50-554/81-10

- The subject deficiency was initially reported to NRC-0IE, Region II, Inspector Pete Taylor on June 30, 1981 as NCR PBN MEB 81-02. 'In i compliance with paragraph 50.55(e).of..10 CFR Part 50, we are' enclosing our final report on the subject deficiency. - We consider.10 CFR Part 21-applicable to this nonconformance.

If you have any questions concerning this matter, please get in touch 1

__with Jim Domes at FTS 857-2014 Very truly.yours, TENNESSEE VALLEY AUTHORITY

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L. M. Mills, Manager Nuclear Regulation and Safety Enclosure oc: Mr. Victor Stello, Director (Enclosure)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC- 20555 S

I I 9110290250 811015' PDR ADOCK 050005$4 PDR S.

~An Equal Opportunity Employer . ..

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, ENCLOSURE PHIPPS BEND NUCLEAR PLANT DIESEL ENGINE OIL PLUGS y PBRD-50-554/81-10 '

10 CFR 50.55(e)

REPORT NO. 2 (FINAL)

On June 30, 1931, TVA informed NRC-0IE, Region II Inspector, Pete Taylor, of a potentially reportable condition under 10 CFR 50.55(e) regarding diesel engine oil plugs. The vendor, Transamerica Delaval, notified NRC of this condition in a letter dated June 3, 1981, pursuant to the requirements of 10 CFR 21. This is the final report on this deficiency.

-j Description of Deficiency Transamerica Delaval, Incorporated, Oakland, California, informed TVA of '

a potential defect in a component of a standby diesel generator engine which was supplied to Phipps Bend Nuclear Plant unit 2. This deficiency applies only to one engine (serial number 77034-2932). This engine was shipped in May 1981.

There exists a potential problem with oil plugs which seal oil passages drilled in the crankshaft. The potential defect was caused by improper installation. This plug is rolled into the crankshaft using an expansion tool. The plug is a slight drive fit in the crankshaft. It was driven into the shaft using a steel tool. The tool used on this engine was undersized. The mechanic used excessive force during installation, causing an upset on the bottom of the. plug. This upset could lead to failure of the plug.

Safety Implications If defective plugs are not identified and replaced, the engine availability could be adversely affected. The unavailability of a diesel generator during a loss of offsite power situation would leave the plant j susceptible to a single failure. Therefore, this condition could adversely affect plant safety.

Corrective Action The existence of the upset can be determined by visual inspection.

Transamerica DeLaval will perform the required inspection and repair at the site during unpackaging and installation of the diesel. TVA has presently placed Phipps Bend in an indefinitely deferred status and will track the completion of corrective actions internally. To prevent recurrence of this problem, a new hardwood drive is now used by Transamerica DeLaval.

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