ML20116E187
| ML20116E187 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 03/22/1985 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-337 160, NUDOCS 8504300209 | |
| Download: ML20116E187 (4) | |
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Carolina Power 8 35 bi$mampgr.;=3 g, Light Company s
m:--a P. O. Box 101, New Hill, NC 27562 March 22,1985 Dr. J. Nelson Grace NRC-337 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30323 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 SEISMIC RESTRAINT STRUCTURES, ITEM 160
Dear Dr. Grace:
Attached is our final report on the subject item, which was deemed reportable per the provisions of 10CFR50.55(e) on March 6,1984. Further evaluation has now determined this item to be not reportable per the provisions of 10CFR50.55(e). With this report, Carolina Power and Light Company considers this matter closed.
If you have any questions regarding this matter, please do not hesitate to contact me.
Yours very truly,
- MiVf
^A W R. M. Parsons Project General Manager Completion Assurance Shearon Harris Nuclear Power Plant RMP/sae A ttachment cc:
Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC)
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8504300209 g 30 00 PDR AW PDR S
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CAROLINA POWER & LIGHT COMPANY
.SilEARON HARRIS NUCLEAR POWER PLANT UNIT NO.1 FINAL REPORT SEISMIC RESTRAINT STRUCTURES ITEM 160 March 22,1985 REPORTABLE UNDER 10CFR50.55(e) e l
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SUBJECT:
10CFR50.55(e) Reportable Item, Shearon Harris Nuclear Power Plant, Unit 1. Deficient shop welds on seismic restraint structures received from Pittsburgh Bridge and Iron (PBI)
Industries.
ITEM:
Seismic restraint structures supplied on Purchase Order NY-435196.
SUPPLIED BY:
Pittsburgh Bridge and Iron Industries, Rochester, Pennsylvania.
NATURE OF DEFICIENCY:
1.
Undersized welds and missing welds 2.
Cosmetic weld defects 3.
Base metal damage 4.
Weld defects resulted during the fabrication of these items in 1979. However, the problems were not identified until January 26, 1984, when the frames received an on-site primary inspection of the shop welds.
DATE PROBLEM REPORTED:
On March 6,1984, CP&L (Mr. N. J. Chiangi) notified the NRC (Mr. A. Hardin) that the February 9,1984, potentially reportable item (Item 160) was reportable per the provisions of 10CFR50.55(e).
SCOPE OF PROBLEM:
PBI Industries seismic restraint structures shipped to CP&L for use at Shearon Harris Nuclear Power Plant, Unit 1.
SAFETY IMPLICATIONS:
Statistical sampling by Ebasco, of the reported deficiencies identified on fif ty (50) of the PBI seismic restraint structures showed that of the defects evaluated, none would have caused structural failure to occur under seismic conditions.
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REASON DEFICIENCY IS NOT REPORTABLE: Previously, this item was determined to be reportable due to the extensive evaluation projected.
However, a statistical evaluation has been performed by Ebasco, and the deficiencies have now been found to be not reportable.
CORRECTIVE ACTION:
The deficiencies, noted on the fif ty(50) originally reported PBI restraint structures, have been repaired.
The remaining structures were not inspected due to the evaluation results.
This matter is now considered resolved.
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