ML20040C589

Supplemental Final Deficiency Rept Re Inadequate Circuit Separation,Initially Reported 790323.Wire Redressing,Conduit Installation Wire Relocation & Fire Tests Performed.Also Reported Per Part 21

ML20040C589
Person / Time
Site:	Grand Gulf
Issue date:	01/06/1982
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-79 10CFR-050.55E, 10CFR-50.55E, AECM-82-13, DEFE-820106, NUDOCS 8201290058
Download: ML20040C589 (5)

Text

, q e *

,$ e- .^i * !)

MISSISSIPPI POWER & LIGHT COMPANY

' ' Helping Build Mississippi P. O . B O X 16 4 0, A C, ON, MISSISSIPPI 39205 2'e a JAMES P. McGAUGHY. JR. '

assisum vice msioam January 6, 1982 g c9 D

Y D Office of Inspection & Enforcement g .

' 'q".

U. S. Nuclear Regulatory Commission _UE D Region II _

A2 101 Marietta Street, N.W. 9; g 'n 7 7932 A '

Suite 3100 "$[],.]p>rerg Atlanta, Georgia 30303 rgc ~ D I8 s/

/ 0 Attention: Mr. J. P. O'Reilly, Regional Administrator 4 t W

Dea r Mr. O'Reilly:

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 Supplement to PRD-79/07,,

Final Report, Inadequate Circuit Separation AECM-82/13 References 1) AECM-79/37, 4/23/79

2) AECM-79/65, 6/20/79

3) AECM-79/117, 10/22/79

4) AECM-80/33, 1/31/80

5) AECM-80/102, 5/15/80

6) AECM-80/298, 12/1/80

7) AECM-81/199, 6/9/81 On March 23, 1979, Mississippi Power & Light Company notified J. K.

Rausch, of your of fice, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GCNS) construction site. The deficiency concerns circuit separation deficiencies associated with the Unit I and Unit 2 Power Generation Control Complex (PGCC).

Based on the results of our investigation we have determined that this deficie icy is reportable under 10CFR50.55(c) and 10CFR21. All details are provided in our attached Supplemental Final Report.

Yours truly y J. P. McGaughy, Jr.

ATTACilMENT cc: See page 2

_ OFFICIAL copy Ohhh0kf6 1#G S PDR

. . . . . die South Utilities System b I

Mr. J. P. O'Reilly AECM-82/13 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. 0. Box 1589 Hattiesburg, MS 39401 l

l l

l

Attechment to AECM-82/13 Pegs 1 of 2 FINAL REPORT FOR PRD-79/07

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-82/13, January 6, 1982.

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 issue was originally discovered during a limited scope audit by our Constructor of components designated for the GGNS Unit 2 Power Generation Control Complex (PGCC). The deficiency initially concerned apparent nonconformances with Regulatory Guide 1.75. Improper separation was noted with redundant Class IE wiring Division 1 and Division 4, te rminating on common device FK-48B in panel 2H13P692. Further invest-igation revealed that the same condition existed on panels 2H13P693 and 2H13P694.

Later investigations, including site inspections by the NSSS vendor, have indicated that apparent violations of the separation criteria of Regulatory Guide 1.75 exist in Unit 1 control room panels also.

B. Analysis of Safety Implications The NSSS vendor has stated that, without correction, separation items involving wire and cable separation routing would not conform to Regula-tory Guide 1.75 (ie: Several violations existed where the six (6) inch divisional separation was not maintained).

L

Attachment to AECM-82/13 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 March 22, 1979. We reported the deficiency to Mr. J. K. Rausch of your office as a Potentially Reportable Deficiency on that date. Since that date MP6L has filed seven (7) interim reports to inform the Commission of the progress and status of this deficiency. An evaluation for Part 21'has now been completed.

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

Circuit separation deficiencies existed in the Unit 1 and Unit 2 Power Genera-tion Control Complexes.

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

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

reponsible for the action: and the length of time that has been . . . taken to complete the action.

A. Corrective Actions Taken Initial corrective actions to address the audit items and other separa-tion deficiencies noted lacluded wire redressing, conduit installation, and wire relocation. In some cases, the NSSS vendor attempted to estab-lish minimum separation by fire tests and by analyzing the flame retardant characteristics of control panel materials, as allowed by IEEE Standard 384. Fire tests were conducted on a representative set of devices and conduit material used in GGNS control room panels. These fire tests are now completed. All devices and materials passed the fire testing.

General Electric has issued Field Disposition Instruction (FDI) WAPR and Field Disposition Deviation Request (FDDR) JB1-1369 to track and correct the separation deficiencies. All work will be completed prior to Unit i fuel load.

To track corrective actions on Unit 2 GE will issue FDI-WBOP in October, 1982.

B. Responsible Individual G. B. Rogers, Jr.

Site Manager Mississippi Power and Light Company 1

o*

• Attachment to AECM-82/13 Page 3 of 3 C. Length of Time to Complete Actions Mississippi Power & Light received information of the defect on March 23,

, 1979. All work for Unit I will be completed prior to Unit 1 fuel. load.

Unit 2 work will be completed prior to Unit 2 fuel load.

8. Any advice related to the defect ... 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.

I e j

e i

9 1

+

e l-I i

L

- -