ML19340B822

Interim Deficiency Rept Re Defective Link Rod Assembly on Standby Diesel Generators Supplied by Transamercia Delaval, Inc,Initially Reported on 801003.No Potential Problem Exists on Unit 1 Engines.Unit II Engines Will Be Inspected

ML19340B822
Person / Time
Site:	Grand Gulf
Issue date:	11/03/1980
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-80-270, NUDOCS 8011120355
Download: ML19340B822 (2)

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O MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi

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P. O. B OX 1640, J AC K SO N. MIS SIS SIP PI 3 9 205 1

J^j y M g d f November 3, 1980 fi Office of Inspection & Enforcement _. O U. S. Nuclear Regulatory Commission c' i Region II

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101 Marietta Street, N.W. Eff_. . .

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Suite 3100

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Atlanta, Georgia 30303 C- --

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Attention: Mr. J. P. O'Reilly, Director h u

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SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/61, Standby Diesel Generator Link Rod Assembly, Interim Report AECM-80/270 ou October 3, 1980, Mississippi Power & Light Cc=pany notified Mr. M. Hunt, of your office, of a Potentially Reportable Deficiency (PRD) regarding a defective link rod assembly on the standby diesel generators supplied by Transamerica Delaval, Inc.

Attached is our interim report. We expect to provide our final determination of reportability by July, 1983. This condition is being tracked by Bechtel QAR F-244.

Yours truly, m t gy J. P. McGaughy, Jr.

ATR:=t Attachment ec: Mr. N. L. Stampley Mr. Victor Stello, Directo P '

Mr. R. B. McGehee Division of Inspection & Enforcement Mr. T. B. Ccnner U. S. Nuclear Regulatory Commission i

Washington, D.C. 20555 l

o/1 8011120 ,3 g 3 7 E'/

Member Middle South Utilities Systern

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• Attechmint to AECM-80/270

• Page 1 of 1 INTEREM REPORT FOR PRD-80/61 l I. Description of Deficiency In a letter dated September 22, 1980, Transamerica Delaval, Inc.

notified MP&L that they had filed a 10CFR21 report with the USNRC. The report concerned a potential defect in the link rod assembly in which the dowel counterbore in the link rod may be too shallow. The defective link rod could lead to a link rod bolt failure, thereby rendering the engine nonavailable. The defect is limited to the model DSRV 12, DSRV 16, and DSRV 18 built before February 1980.

II. Approach to Resolution of Deficiency The Constructor is to inspect the diesel generators, using written instructicas and procedures furnished by the supplier.

III. Status of Proposed Resolution The Constructor has investigated and determined, through inspec-tion, that the Unit I Diesel Generator Engines, S/N 74033-2624 and S/N 74034-2625, are within the specified tolerances. Based on this inspection, no potential problem exists for standby diesel link rod assemblies for Unit I engines.

The Unit II engines have not been inspected because they are cur-rently under field storage. These engines are to be inspected af ter they are installed on their permanent foundations.

IV. Reasons for Delaying Final Report Unit II Standby Diesel Generators are not available for inspection.

V. Projected Final Report Submittal Date The final report will be aubmitted prior to the release of the Diesel Generators by the Constructor to the Checkout & Turnover Organization. It is estimated this inspection will be acecmplished by December. 1983.

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