AECM-82-605, Final Deficiency Rept PRD-82/33 Re Excessive Length of Capscrews in Standby Diesel Generator Air Start Valve Assembly Potentially Resulting in Valve Failure.Initially Reported on 820623.Deficiency Not Reportable Per Part 21

Final Deficiency Rept PRD-82/33 Re Excessive Length of Capscrews in Standby Diesel Generator Air Start Valve Assembly Potentially Resulting in Valve Failure.Initially Reported on 820623.Deficiency Not Reportable Per Part 21

ML20079J827
Person / Time
Site:	Grand Gulf
Issue date:	12/15/1982
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, AECM-82-605, PDR-82-33, NUDOCS 8212280377
Download: ML20079J827 (5)

Text

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MISSISSIPPI POWER & LIGHT COMPAAiY Helping Build Mississippi G _

WE P. O. B OX 16 40 J ACK S O N. MIS SIS SIP PI 3 9 205 p

J AMES P. McGAUGHY, JR. December 15, 1982 0

• ASSISTANT VICE PGESIDENT

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Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission .l Region II l

101 Marietta Street, N.W.

Suite 3100 g Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-82/33, 10CFR21 Supplement to Final Report, and 10CFR50.55(e) Final Report, Capscrews in Standby Diesel )

Generators AECM-82/605 Re fe rence : AECM-82/289, 6/25/82 l On June 23, 1982, Mississippi Power & Light Company notified Mr. R.

Butcher, of your office, of a Reportable Deficiency at the Grand Gulf Nuclear Station (GGNS). The deficiency concerns the length of capscrews in the l

starting valve assembly for the Standby Diesel Generators manuf actured by {

Transa terica Delaval, Inc. of Oakland, California.

l This deficiency has been determined reportable under the provisions of 10CFR21 for Unit I and under 10CFR50.55(e) for Unit 2. Our Final Report for Unit I was submitted by AECM-82/289 dated June 25, 1982. Attached is our Final Report, as supplemented, for both Units I and 2.

Yours truly, G // '

\

J. P. McGaughy, Jr.

MAL:dr ATTACMMENT cc: See page 2 . cp

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8212280377 821215 '. 00 h PDR ADOCK 05000416 S PDR h Member Middle South Utilities System

I-Mr. J. P. O'Reilly AECM-82/605 NRC Page 2 cc: Mr. M. L. Stampley Mr. R. B. McGehee Mr. T. P. Conner Mr. R". chard C. DeYoung, Director

- Offi.ce of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589 Hattiesburg, MS 39401 4

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. Attachment to AECM-82/605 P gs I cf 3 FINAL REPORT FOR PRD-82/33

1. Name and address of the individual ... informing the commission:

J. P. McGaughy, Jr.

Assistant Vice-President, Nuclear Production P.O. Box 1640 Jackson, Mississippi 39205 Notification of Part 21 applicability made to Mr. J. P. O'Reilly, NRC, Region II by letter AECM-82/289, June 25,1982.

2 Identification of the facility ... which . .. contains a deficiency:

Grand Gulf Nuclear Station (GGNS) Units 1 and 2 Port Gibson, Mississippi 39150 NOTE: 10CFR21 is not applicable for Unit 2 as the diesel generators have not been turned over to. MP&L.

. 3. Identification of the firm . . . Supplying the basic component which . ..

contains a deficiency:

The Diesel Generators were manufactured by Transa.nerica Delaval, Inc. ,

Oakland, California and supplied to Grand Gulf by Bechtel Power Corporation, Gaithersburg, Maryland.

4. Nature of the deficiency ... and the safety hazard which ... could be created by such a deficiency ...:

A. Description of the Deficiency

On June 11, 1982, Mississippi Power & Light Company received a letter j from Transamerica Delaval, Inc. notifying us they had informed the NRC of a potential problem concerning the Division I and II Diesel Generators provided to Grand Gulf.

The deficiency involves the length of the capscrew which holds the i

starting air valve assembly in the cylinder head. The capscrews may be bottoming in the tapped holes in the cylinder head before the assembly is properly seated. This could result in insufficient or unequal forces being applied to the air start valve which could result in its failure.

s Attachme:t to AECM-82/605

. P:ga 2 cf 3 B. Analysis of Safety Implications Failure of the starting air valve assembly could result in the non-availability of the diesel generator. The diesel generators supply power to systems that are required to shutdown and cooldown the reactor and to maintain the reactor in this condition during a loss of of f-site power.

5. The date on which the information of such de ficiency . . . was obtained.

Mississippi Power and Light received information of the deficiency from Transamerica Delavel, Inc. on June 11, 1982. MP&L completed its evaluation on June 23, 1982. We reported the deficiency to Mr. R. Butcher, of your of fice, on June 23, 1982. The MP&L " Responsible Of ficer," Mr. J. P.

McGaughy, Jr. was notified on June 29, 1982.

6 In the case of the basic component ... the number and location of all such components.

There are four diesel generators (two for each unit) supplied by Transamerica Delaval at the Grand Gulf Nuclear Station. Transame ric a Delaval letter of May 13, 1982, from R. E. Boyer to the NRC identifies other nuclear stations which have similar engines.

7. The corrective action which has been taken . .. the name of the individual

... responsible for the actioa; and the length of time that has been ...

taken to complete the action.

A. Corrective Actions Taken MP&L has issued a design change, DCP-32/4059, for the Unit 1 Division 1 and Division II diesels to implement the manufacturer's recommended corrective action. This involves either modifying or replacing the potentially defective bolts.

The work on the Division I diesel was performed under Maintenance Work Order (MWO)-M26237. The work performed under HWO-M26236 completed corrective actions on the Division II diesel.

Our Architect / Engineer initiated CR8122 to track the corrective actions for the Unit 2 diesel generaters.

Actions to preclude recurrence will be provided by Transamerica Delaval since the deficiency originated with their equipment.

y:

Attachment A' to AECM-82/605 Page 3 of 3 B. Responsible Individual C. K. McCoy T. H. Cloninger Nuclear Plant Manager Unit 2 Project Manager Mississippi Power & Light Co. Mississippi Power & Light Co.

Port Gibson, Mississippi Port Gibson, Mississippi Responsible .for Unit 1 Responsible for Unit 2 C. Length of Time to Complete Actions Corrective actions for Unit I have been completed.

Corrective actions for Unit 2 will be completed prior to turnover to MP&L.

8 Any advice related to the deficiency ... that has been, is being, or will be given to purchasers or licensees:

As the deficiency did not originate with MP&L, we have no advice to of fer.