ML20083B603

Fifth Interim Deficiency & Part 21 Repts,Item 61 Re Defective Valve Springs on Diesel Engines.Initially Reported on 810828.Once Bldg Engine Installation Completed.Valve Springs Will Be Changed Out

ML20083B603
Person / Time
Site:	Harris
Issue date:	12/14/1983
From:	Parsons R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-158, REF-PT21-83-100-000 10CFR-50.55E, 61, NCR-158, PT21-83-100, PT21-83-100-000, NUDOCS 8312210220
Download: ML20083B603 (4)

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C96L Carolina Power & Lightgmpany [

.s "a-c P. O'.%u u i dNew Hill, N. C. 27562 ox 101, December 14,1983 l

Mr. James P. O'Reilly NRC-158 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Su.ite 2900)

Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 900,000 KW - UNITS 1 & 2 DEFECTIVE VALVE SPRINGS ON DIESEL ENGINES, PURCHASE ORDER NY-435079, ITEM 61

Dear Mr. O'Reilly:

Attached is our fifth interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on August 28, 1981. CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by April 2,1984.

Thank you for your consideration in this matter.

Yours very truly, lllPp)P  :%

, R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/bk Attachment ec: Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)

Mr. R. C. DeYoung (NRC) r ..

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CAROLINA POWER & LIGHT COMPANY SHEARON IIARRIS NUCLEAR POWER PIANT UNIT NO. 1 FIFTH INTERIM REPORT DECEMBER 14, 1983 DEFECTIVE VALVE SPRINGS ON DIESEL GENERATOR ENGINES ITDi NO. 61 (DDR 656)

REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21

SUBJECT:

Shearon Harris Nuclear Power Plant, Unit No. I 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 DLFICIENCY 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.

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DATE PROBLei REPORTED: August 28, 1981 - CP&L (L. E. Jones) notified the NRC Region II (R. Butcher) that this item was reportable l under 10CFR50.55(e) and 10CFR, Part 21.

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SCOPE OF l 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 IMPLICATON: The diesel-engine generator units supply power to the ESF buses in case of a loss of both the normal on-site and 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 DEFICIENCY IS REPORTED: If left uncorrected, failure of the valve spring could result in loss of the emergency on-site AC power supply.

CORRECTIVE ACTION: The diesel engine is in the final stages of installation.

The Diesel Generator Building is required to be sealed and cleaned before the engine can be opened for removal and replacement of the valve springs. Once the building and engine installation are complete, the valve springs will be changed out.

Transamerica DeLaval has removed all defective springs from stock and has taken extra receiving inspection measures to assure this problem does not reoccur.

FINAL REPORT: It is estimated that the installation of the equipment will be completed April 2, 1984. A final report will be issued at that time.

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