ML20205A442
| ML20205A442 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 04/12/1985 |
| From: | Dale L MISSISSIPPI POWER & LIGHT CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| AECM-85-2-0008, AECM-85-2-8, NUDOCS 8504250518 | |
| Download: ML20205A442 (2) | |
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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi EnMMiliddB P. O. B O X 164 0. J A C K S O N, MIS SIS SIP PI 39215-1640 g gnl7 nT : 50 April 12, 1985 NUCLEAR LICENSING & SAFETY DEPARTMENT U. S. Nuclear Regulatory Commission Region II 101 Marietta St., N. W., Suite 2900 Atlanta, Georgia 30323 Attention:
Dr. J. Nelson Grace, Regional Administrator
Dear Dr. Grace:
SUBJECT:
Grand Gulf Nuclear Station Unit 2 Docket No. 50-417 File:
0260/0511/0512 PRD-84/11, Interim Report #1, Westinghouse Type SA-1 Relays AECM-85/2-0008
Reference:
AECM-84/2-0018, October 26, 1984 Per the referenced letter, Mississippi Power & Light Company (MP&L) stated that a final report was expected to be provided by April 12, 1985 for PRD-84/11. The subject potentially reportable deficiency concerned the potential for leaking tantalum capacitors, located internally at the top of the SA-1 relay printed circuit board, to cause corrosion buildup on the circuit board and subsequent relay failure.
MP&L previously determined that this deficiency was not reportable under the provisions of 10CFR21 for GGNS Unit 1.
As indicated in the referenced letter a determination as to whether the deficiency is reportable under 10CFR50.55(e) for Unit 2 can not be made until the Unit 2 relays are energized and monitored for two weeks to determine whether they contain leaking capacitors.
In November 1982 construction activities on Grand Gulf Unit 2 were reduced to a minimum. Being in this reduced activity mode has limited the number of inspections that can be done on Unit 2 equipment to determine if the identified situation was or is applicable.
Bechtel has initiated Quality Action Request (QAR) F-464 to track required action to close our investigation of this PRD.
The QAR will remain open until all action is complete, gar 2iBBR "i89h7 gg4 J0P14AECM85040301 - 1 Member Middle South Utilities System 0 0 i
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AECM-85/2-0008 Page 2 Based on the above explanation, MP&L_ requests that further update on the subject PRD be deferred until after resumption of normal construction activities on Unit 2.
If there are any questions, please advise.
Yours truly, f
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F. Dale Director
-EBS/SHH:rw cc:
Mr. J. B. Richard Mr. O. D. Kingsley, Jr.
Mr. N. S. Reynolds Mr. G. B. Taylor Mr. James M. Taylor, Director Office of Inspection & Enforcement-U. S. Nuclear Regulatory Commission Washington, D. C.
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