AECM-82-394, Final Deficiency Rept Re Unsuitable Governor Drive Coupling on Transamerica Delaval Diesel Generators.Initially Reported on 820824.Flexible Isoprene Elements to Be Replaced W/ Neoprene Elements.Also Reportable Per Part 21 for Unit 1

Final Deficiency Rept Re Unsuitable Governor Drive Coupling on Transamerica Delaval Diesel Generators.Initially Reported on 820824.Flexible Isoprene Elements to Be Replaced W/ Neoprene Elements.Also Reportable Per Part 21 for Unit 1

ML20063M851
Person / Time
Site:	Grand Gulf
Issue date:	09/10/1982
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-82-394, NUDOCS 8209160184
Download: ML20063M851 (6)

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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. O. B O X 16 4 0, J A C K S O N, MI S SI S SI P PI 3 9 2 0 5 1 September 10, 1982 J AMES P. McGAUGHY, JR. j AMisTANT viCE PREstDENT Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W.

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

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Do cke t No. 50-416/417 License No. NPF-13 File 0260/15525/15526 PRE-82/35 Final Report, AECM-82/394 cc On August 24, 1982, Mississippi Power & Light Company notified Mr.cF.

Cantrell, of your of fice, of a Potentially Reportable Deficiency (PRD).'ht the ,

Grand Gulf Nuclear Station (GGNS) construction site for Unit 2. The S i> Z deficiency concerns the governor drive coupling on the Transamerica Dyaval dj Diesel Generators. .,

2a *r We have determined that this deficiency is reportable under the cn y provisions of 10CFR21 for Unit I and 10CFR50.55(e) for Unit 2. It is not o reportable under 10CFR21 for Unit 2 for MP&L because the defective equipment' '

has not been turned over to MP&L. ~

Corrective Actions for both Units are given in our attached Final Repcrt.

Yours truly,

,, J. P. McGaughy, Jr.

KDS:dr ATTACRMENT cc: See page 2 8209160184 820910 -

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Mr. J. P. O'Reilly AECM-82/394 NRC Page 2 cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Office 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 Ilattiesburg, MS 39401 I

Attach::nt to AECM-82/394 Page 1 of 3 FINAL REPORT FOR PRD 82/35

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

J. P. McGaughy, Jr.

Assistant Vice-President, Nuclear Production P.O. Box 1640 Jackson, Mississippi 39205 This deficiency was also reported under 10CFR21 by Transamerica Delaval, Inc. to the NRC in their letter dated June 23, 1982.

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

Grand Gulf Nuclear Station (GGNS) Units 1 and 2 Port Gibson, Mississippi 39150 10CFR21 is not applicable for Unit 2 as the diesel generators have not been turned over to MP6L.

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

contains a deficiency:

The diesel generators were manufactured by Transamerica Delavel, 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 The deficiency involves the flexible element used in the governor drive coupling on the diesel generators supplied by Transamerica Delaval. The flexible element material, an isoprene, was designed for atmospheric use and is not suitable for use in the high-temperature, oil atmosphere encountered in the engine's gear case.

The rubber deteriorates rapidly and will ultimately fail. This may induce sufficient f requency instability that would result in the engine tripping off-line.

B. Analysis of Safety Implications Failure of the governor drive coupling 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 off-site power.

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Attachmsnt to AECM-02/394 Page 2 of 3

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

Mississippi Power and Light received information of the deficiency on August 23, 1982. We reported the deficiency to Mr. F. Cantrell, of your of fice, as a Potentially Reportable Deficiency for GGNS Unit 2 on that date. An evaluation for Part 21 for GGNS Unit I has been completed and the MP&L " Responsible Of ficer," Mr. J. P. McGaugby, Jr. , has been notified.

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

There are two (2) diesel generators on each Unit at Grand Gulf for a total of four (4). Other locations of defective components were listed by 'Jransamerica Delaval in their notification letter to the NRC of June 23, 1982.

We do not have knowledge of the location of other defective equipment.

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

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

taken to complete the action.

A. Corrective Actions Taken MP&L will implement the manufacturer's recommended corrective i action. The currently installed governor drive coupling flexible isoprene elements will be replaced with neoprene elements.

! Deficient spare parts that may presently be in stock will not be utilized.

B. Responsible Individual Unit 1 Unit 2 C. K. McCoy T. H. Cloninger Nuclear Plant Manager Unit 2 Project Manager Mississippi Power & Light Co. Mississippi Power & Light Co.

Port Gibson,Ifississippi Port Gibson, Mississippi C. Length of Time to Complete Actions Corrective actions for Unit I will be ca ..ted prior to October 29, 1982. Corrective actions for Unit 2 will be completed by our Architect / Engineer prior to turnover to Mississippi Power & Light l Company.

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O Attachment to AECM-82/394 Page 3 of 3 ,

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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 offer.

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