ML20077B723
| ML20077B723 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 07/14/1983 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-99, REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8307250404 | |
| Download: ML20077B723 (4) | |
Text
504 00
~
83 m 9'"Ril *i'AS"'
P. O. Box 101, New Hill, N. C.
27562 July 14, 1983 Mr. James P. O'Reilly NRC-99 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 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 fourth 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. As stated in the attached report, it is currently projected that corrective action and submission of the final report will be submitted by January 6, 1984.
Thank you for your consideration in this matter.
Yours very truly, ywJ:M R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment cc: Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC)
U5>
opyic W 8307250404 830714 (6-1/
A PDR ADOCK 05000400
/
S PDR j
i I
c CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 INTERIM REPORT DEFECTIVE VALVE SPRINGS ON DIESEL ENGINES ITEM NO. 61 JULY 13,1983 REPORTABLE.UNDER 10CFR50.55(e) AND 10CFR21 r
1 Y
R I
--,,,,,-,_.,~,.4-_
- --,. - - -. - - - -, - - ~, - - - ~. ~
t
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 D2Laval, 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.
1 I
l DATE PROBLEM OCCURRED:
Refer to section above.
l-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.
4 SCOPE OF PROBLEM:
The deficiency involves the two diesel engines shipped on Purchase Order NY-435079. These engines have defective valve springs installed.
SAFETY IMPLICATION:
The diesel engine-generator units supply power to the ESF buses in case of a loss of both the normal on-site and j
off-site power sources.
i The improper shot peening of the valve spring could lead to failure of the spring.
If the valve spring fails, i
engine availability could be affected.
L
e REASON DEFICIENCY 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 diesel engines have been placed on " hold" at the Shearon Harris site.
Valve spring changeout requires the ability to har the engine over, which cannot be accomplished until the engine is sitting on its foundation with the flywheel installed.
The engines are currently mounted on their foundations without the flywheels.
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:
Due to delays, a final report cannot be issued at this time because the engines cannot be barred over until the flywheel is attached.
A final report will be issued once the corrective action described above has been completed.
It is currently projected that the submittal date will be January 6, 1984.
5 1
e s
- - -. -