ML20083K250
| ML20083K250 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 04/06/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-205 160, NUDOCS 8404160112 | |
| Download: ML20083K250 (4) | |
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CP&L Carohna Power a LQht Company p
E.37jE r,p@AM.Ohmura P. O. Box 101, New Hill, N. C. 27562 April 6,1984 Mr. James P. O'Reilly NRC-205 United States Nuclear Regulatory Commission Rsgion II 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON IIARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 SEISMIC RESTRAINT STRUCTURES, ITEM 180
Dear Mr. O'Reilly:
Attached is an interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e), on March 6,1984. CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by July 17,1984.
Thank you for your consideration in this matter.
Yours very tr gy R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment ec:
Messrs. G. Maxwell /R. Prevatte (NRC-SFINPP)
Mr. R. C. DeYoung (NRC) 1.
0FFICIAL COPY
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CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNrrNO.1 INTERIM REPORT SEISMlC RESTRAINT STRUCrURES ITEM 160 April 6,1984 -
REPORTABLE UNDER 10CFR50,55(e) n
SUBJECT:
10CFit50.55(e) Reportable Item, Shearon Ilarris 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 P.O. #435196.
SUPPLIED BY:
Pittsburgh Bridge and Iron Industries, Rochester, Pa.
NATURE OF DEFICIENCY:
1.
Undersized welds and missing welds 2.
Cosmetic weld defects 3.
Base metal damage 4.
Incorrect weld symbols and welds not per design DATE PROBLEM OCCURRED:
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:
Fifty (50) seismic restraint structures which were fabricated by PBIIndustries for CP&L use on Shearon Harris Nuclear Power Plant, Unit 1.
SAFETY IMPLICATIONS:
Deficient shop welds could cause a safety-related restraint structure to fail under seismic conditions. As a result, if not corrected, they could adversely affect the safe operation of this facility.
REASON THE DEFICIIRCY Ui The number of deficiencies represent a significant
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REPORTABLE condition which would require extensive evaluetion for reportability. The item represents a breakdown in the PBI and Ebasco QA programs, which allowed structures to be shipped with welds which were not in accordance with des!gn criteria. Therefore, the item is reportable under 10CFR50.55(e),
m CORRECTIVE ACTION:
All seismic restraint structure shop weld deficiencies will be upgraded by means of rework or permanent waiver to meet acceptance criteria per Ebasco Specification CAR-2165 A003, Rev. 2.
PREVENTIVE MEASURES:
1.
PBI has restructured their QA Department to insure higher quality inspections. They have developed a better ratio of supervisors to workers and inspectors to workers. A continuous training program is also present for their employees through its QA and QC Departments.
2.
CP&L receipt QA inspections are being performed on all restraint structures prior to release for installation.
FINAL REPORT:
A final report will be issued once the corrective actions described above have been completed. It is currently projected that the final report will be submitted by July 17, 1984.
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