ML20097J836
| ML20097J836 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/07/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-265, REF-PT21-84-433-000 61, NRC-265, PT21-84-433, PT21-84-433-000, NUDOCS 8409240048 | |
| Download: ML20097J836 (4) | |
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Carolina Power & Light Company ON bb[. i. {ox New Hill, N. C. 27562 September 7, 1984 Mr. James P. O'Reilly NRC-265 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 DEFECTIVE VALVE SPRINGS ON DIESEL ENGINES, PURCHASE ORDER NY-435079, ITEM 61
Dear Mr. O'Reilly:
1 Attached is our final r,eport on the subject item which was deemed 4
reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on August 28, 1981. With this report, Carolina Power & Light Company considers this matter closed.
If you have any questions regarding this matter, please do not hesitate to contact me.
Very truly yours,
/mv" R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant 2
RMP/ jam Attachment cc: Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) 8409240048 840907
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CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 FINAL REPORT DEFECTIVE VALVE SPRINGS ON DIESEL GENERATOR ENGINES ITEM NO. 61 (DDR 656) i SEPTEMBER 8, 1984 I
i REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21 Y
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SUBJECT:
Shearon Harris Nuclear Power Plant, Unit No. 1 10CFR50.55(e) and 10CFR21, reportable deficiency. Valve springs for emergency diesel-engine generator units purchased from Transamerica DeLaval, Inc. under Purchase Order NY-435079.
ITEM:
Intake and exhaust valve springs installed in engine cylinder head assemblies. Total of 128 springs in two diesel engines.
SUPPLIED BY:
Transamerica DeLaval, Inc., Oakland, California.
Springs manufactured by Melrose Spring and Tool Works, Oakland, California, as subvendor to Transamerica DeLaval.
NATURE OF DEFICIENCY Transamerica DeLaval, Inc., shipped two diesel engines to the CP&L site on Purchase Order Ny-435079 in May and June, 1981.
In August 1981, Transamerica DeLaval advised CP&L that the engines may contain valve springs which were not shot-peened properly. The shot-peening is necessary to relieve external stresses incurred in cold working the spring wire. The lack of shot-peening could lead to fatigue failure, which then would affect engine availability.
Telephone conversations with Transamerica DeLaval and a visual inspection confirmed that the defective valve springs had been installed in the two engines shipped to the Shearon Harris plant site.
DATE PROBLEM OCCURRED:
Refer to section above.
DATE PROBLEM REPORTED:
August 28, 1981 - CP&L (L. E. Jones) notified the NRC Region II (R. Butcher) that this item was reportable under 10CFR50.55(e) and 10CFR, Part 21.
SCOPE OF PROBLEM:
The deficiency involves the two diesel engines shipped on Purchase Order NY-435079. These engines have defective valve springs installed.
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SAFETY LMPLICATION:
The diesel-engine generator units supply power to the ESF buses in case of a loss of both the normal on-site and i
off-site power sources.
The improper shot-peening of the valve spring could lead to failure of the spring.
If the valve spring fails, engine availability could be affected.
REASON DEFIqTENCY IS REPORTABLE:
If left uncorrected, failure of the valve spring could result in loss of the emergency on-site AC power supply.
CORRECTIVE ACTION:
The defective valve springs have been replaced with valve springs of proper quality provided by Transamerica DeLaval.
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