ML20040C614
| ML20040C614 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 01/14/1982 |
| From: | Mcgaughy J MISSISSIPPI POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, AECM-82-22, NUDOCS 8201290082 | |
| Download: ML20040C614 (3) | |
Text
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t MISSISSIPPI'POWERi&, LIGHT COMPANY Helping Build Mossrssippo KSO MISSISSIPPI 39205 m
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JAMES P. McGAUGHY, JR.
January 14, 19 O
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g HECEjVED hI Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission JAN271gggw :
Region 11 101 Marietta Street, N.W.
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11 Suite 3100 noc Atlanta, Georgia 30303
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Attention:
Mr. J. P. O'Reilly, Regional Administrator N
Dear Mr. O'Reilly:
SUBJ E2 : Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-81/47, Interim Report No. 2, Pipe Support Spring Settings AECM-82/22 On November 13, 1981, Mississippi Power & Light Company notified Mr. P. A.
Taylor, of your of fice, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) constturtion site.
The deficiecey concerns actual cold and hot settings on MS-3201 and MS-3401 springs. The actual travel range of the springs dif fers from that shown 'n the Bergen-Patterson catalog.
Our investigation into the deficiency has not been completed. However, we have determined that it is reportable under the provisions of 10CFR50.55(e) as it could adversely af fect the safety of operations of the nucleac power plant. We have not determined reportability under the provisions of 10CFR21.
Details are contained in our attached Interim Report. We expect to submit a Final Report by thrch 15, 1982.
Yours truly, g J. P. McGau ;hy, Jr.
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Mr. J. P. O'Reilly AECM-82/22 NRC Page 2 cc:
Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Kichard 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
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Attachment to AECM-82/22 Page 1 of 1 IFTERIM REPORf NO. 2 FOR PRD-81/47 1.
Description of the Deficiency The actual cold and hot settings on all MS-3201 and MS-3401 Bergen-Patterson springs cannot be accurately achieved because the actual travel range of the springs is dif ferenet than that shown in the Bergen-Patterson catalog and load capacity data sheets.
These type springs have been installed in both "Q" and BOP systems. The springs are used to support the dead weight load of the pipe and to allow for thermal movement in the upward / downward directi n.
All deficient springs have not been identified at this time.
It is presently known that the deficiency applies to Unit 1 and Common.
Our Architect / Engineer has evaluated the deficiency and has determined that ten (10) springs would be overstressed in the upset condition if they had remained incorrectly set.
This overstressed condition could eventually result in piping failure creating a small break accident inside the drywell.
Therefore, had the condition remained uncorrected, it could have adversely l
af fected the safety of operations of the nuclear power plant and is report-able under the provisions of 10CFR50.55(e). Reportability under 10CFR21 has not been determined at this time.
We have not determined at this time if the deficiency af fects the NSSS vendor.
II.
Appr_oach to Resolution of the Problem The cause and extent of the deficiency have not been determined at this time. Therefore, corrective actions and actions to preclude recurrence cannot be formulated.
III.
Status of Proposed Resolution The ef fect on safety of plant operations has been determined. Our Architect / Engineer is presently in the process of determining cause and extent, corrective actions, and actions to prevent recurrence. MP&L is investigating to determine applicability to the NSSS vendor IV.
Reason Why a Final Report Will _ be Delayed Corrective actions and actions to prevent recurrence cannot be formulated until cause and extent of the deficiency are determined.
V.
Date When Final Report Will be Submitted A Final Report will be submitted by March 15, 1982.