AECM-82-238, Supplemental Final Deficiency Rept Re GE Type CR2940 Switches Installed W/O Locking Rings,Preventing Operation of Switch.Initially Reported on 780717.All Corrective Actions Completed 790306.Also Reportable Per Part 21

Supplemental Final Deficiency Rept Re GE Type CR2940 Switches Installed W/O Locking Rings,Preventing Operation of Switch.Initially Reported on 780717.All Corrective Actions Completed 790306.Also Reportable Per Part 21

ML20063C348
Person / Time
Site:	Grand Gulf
Issue date:	08/16/1982
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-82-238, PDR-78-4, NUDOCS 8208270227
Download: ML20063C348 (4)

Text

• l g MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi mo... -

P. O. B O X 164 0. J AC K S O N, MIS SIS SIP PI 3 9 2 05 JAMES P. MccAUGNY. JR.

A$5lST ANT VICi1 PESsOf hi Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region 11 cc 101 Marietta Street, N.W. -

Suite 3100 ,

Atlunta, Georgia 30303 s Attention: Mr. J. P. O'Reilly, Regional Administrator u fo

Dear Mr. O'Reilly:

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SUBJECT:

Grand Gulf Nuclear St4t' ion Units 1 and 2 License No. NPF-13 ,

Docket Nos. 50-416/417 File 0260/15525/15526 Supplemental Final Report for PRD-78/04, GE-CR2940 Switches AECM-82/238 Re fe rence : 1) AECM-78/58, 8/15/78 ,

On July 17, 1978, Mississippi Power 6 Light Company notified Mr. V. L.

Brownlee, of your office, of a Potentially keportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns GE type CR2940 switches that were insthlled without locking rings.

This deficiency was determined to be reportable under the provisions of 10CFR50.55(e) as reported in our letter of August 15, 1978. As a result of a review of previously reported PRD's to determine the applice.bility of 10CFR21, MP&L has determined that this deficiency is also reportable under the provisions of 10CFR21. We are therefore, supplementing the Final Report submitted in our Reference 1 letter.

All details are included in our attched Supplemental Final Report.

Yours truly, J. P. McGaughy, Jr.

KDS:dr ATTACRMENT cc: See page 2 8208270227 820816  !' 0FFICI AL FN'Y'"

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Member M,ddle South Utilities System

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Mr. T. B. Conner '

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.ir. Richard C. Debug, Director Office of Inspection & Enforcement ", ,

U. S. Nuclear Regulatory Co:nmission ,

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Attachnent to AECM-82/238 i Page 1 of 2 SUPPLEMENTAL FINAL REPORT FOR PRD-7,8f,0_4,

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 11 by letter AECM-82/238, August 16, 1982. This deficiency was also reported under 10CFR21 by General Electric to the NRC in their letter dated July 19, 1978.

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

Grand Gulf Nuclear Station (GGNS) Units 1 and 2 Port Gibson, Mississippi 39150

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

contains a deficiency:

Supplied to Grand Gulf by the General Electric Company, San Jose, California.

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

A. Description of the Deficiency The GE-CR2940 control switch assembly requires a locking ring which secures the switch in place on the benchboard face. An error in manufacturing documentation utilized to manufacture control room panels was responsible for the GE-CR2940 control switch being installed without the locking ring. As a result, the entire switch body may rotate rather than the operator portion of the switch, thereby preventing the switch from functioning.

B. Analysis of Safety implications GE-CR2940 control switches are utilized for safety-related manual control functions. The omission of the locking ring from the switches could delay manual operation during a plant event such that technical specification limits could be exceeded. The panels that contained CR2940 handswitches in safety-related applications are 11113-P879, 11113-P871, and 11113-P872. However, the only safety function on these panels requiring operator action is initiation of hydrogen recombiners following an accident. The plant staff would have adequate time to make associated control switches operable before safety limits were exceeded.

e' Attachm2nt to AECM-32/238 Page 2 of 2

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

Mississippi Power and Light received information of the deficiency on July 17, 1978. We reported the deficiency to Mr. V. L. Brownlee, of your of fice as a Potentially Reportable Deficiency on that date. Since that date MP&L has filed one (1) Report to inform the Commission of the progress and status of the evaluation of this deficiency. An evaluation for Part 21 has been completed.

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

The subject switches are located in panels 1H13-P870,1H13-P871, and 1H13-P872 in Unit 1 at Grand Gulf Nuclear Station. Manufacturing documentation has been revised to assure correct installation for Unit 2.

Locations of other defective switches were reported by General Electric in their letter of July 19, 1978, to NRC Region V.

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 General Electric issued Field Disposition Instruction (FDI)-WAEG on August 1, 1978, to correct the deficiency on Unit 1 panels. All defective CR2940 switches were removed and reinstalled with locking rings.

The switches had not yet been installed on Unit 2. The manufacturing documentation has been revised by General Electric to assure correct installation with the locking rings.

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

C. Length of Tine to Complete Actions MP&L received notification of the deficiency on July 17, 1978. All corrective actions had been completed by March 6, 1979.

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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