ML20009F487

Second Interim Deficiency Rept,Initially Reported 801027,re Link Rod Assembly,Delavel Diesels.Util Will Ensure That All Diesels Have Been or Will Be Inspected for Dowel Counterbore Defects Before Operation.Also Reported Per Part 21

ML20009F487
Person / Time
Site:	Hartsville, Phipps Bend
Issue date:	03/03/1981
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21- 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8107310228
Download: ML20009F487 (2)

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Q Mr. James P. O'Reilly, Director g

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Atlanta, Georgia 30303 6,

Nsj$* ort [b 101 Marietta Street

Dear Mr. O'Reilly:

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HARTSVILLE AND PHIPPS BEND NUC' EAR PLANTS - REPORTABLE DEFICIENCY -

LINK ROD ASSEMBLY - DELAVAL E1ESELS (NCR DELAVAL NO. 1)

Initial notification of the subject deficiency was made to NRC-0IE, Region II, Inspector R. W. Wright on October 07, 1980.

The first interim report was submitted on November 26, 1980.

In compliance with paragraph 50.55(e) of 10 CFR Part 50, enclosed is the second interim report on the subject deficiency. We consider 10 T R Part 21 applicable to this nonconformance. TVA anticipates transmitting the final report on or before June 11, 1981.

If you have any questions regarding this subject, please call Jim Domer at FTS 857-2014.

Very truly yours, TENNESSEE VALLEY AUTHORITY

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l L. M. Mills, Manager Nuclear Regulation and Safety Enclosure cc:

Mr. Victor Stello, Director (Enclosure)

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

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o ENCLOSURE HARTSVILLE AND PHIPPS BEND NUCLEAR PLANTS LINK ROD ASSEMBLY - DELAVAL DIESELS NCR - DELAVAL NO. 1 10CFR50.55(e) - SECOND INTERIM REPORT Description of Deficiency

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Transamerica Delaval (TDI) informed T"t of a potential problem in TDI-supplied diesel generators at the Hart.aville and Phipps Bend Nuclear Plants.

This was reported to NRC-0IE under 10CFR Part 21 by letter from D. H. Martini (TDI) to V. Stello of the NRC dated September 19, 1980.

The problem is that the dowel counterbore of the link rod assembly may be too shallow. This condition, if it exists, could result in the failure of that assembly and ultimately in the unavailability of the diesel generators.

Interim Prorress A total of 12 Transamerica Delaval diesels are designed for use at Hartsville and Phipps Bend ' wo TDI generators per unit).

The eight Transamerica diesels for Hartsville are in ont: ce storage there.

Transamerica Delaval has described the inspection method required to determine whether the dowel counterbore defect is present.. Onsite diesels g

have been placed on hold and will be inspcoted for the subject defect by TDI. To date no action has been taken by Transamerica Delaval to provide for inspection. Since the last report submitted to the NRC, TVA has received an additional diesel at the Phipps Bend site (two of four diesels are now onsite). This diesel was not accompanied by any documentation that would indicate that it has been inspected fur the subject deficiency.

TVA will take steps to ensure that all 12 diesels have been or will be inspected for the presence of this defect before operation.

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