ML20062M237
| ML20062M237 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 07/30/1982 |
| From: | Chiangi N CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, CQAD-82-1300, NUDOCS 8208200039 | |
| Download: ML20062M237 (4) | |
Text
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Carolina Power & Light Company l
July 30, 1982 CQADjQ3-1300iq!{
FILE: SH N-2/18
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ITEM 61 pc=
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Mr. James P. O'Reilly cn
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l United States Nuclear Regulatory Commission c:
Region II y,
101 Marietta Street, Northwest 19 Atlanta, Georgia 30303 c
g c3 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-400 DEFECTIVE VALVE SPRINGS ON DIESEL ENGINES
Dear Mr. O'Reilly:
Attached is the second interim report on the subject item which was de'smed reportable per the provisions to 10CFR50.55(e) and 10CFR, Part 21, on August 28, 1981. As stated in the attached report, it is currently projected that the final report will be submitted during October, 1982.
i Yours very truly, L_
N.
. Chia i - Man r
Engine
'n Con uction Quality Assurance / Quality Control NJC/gea (203)
Attachment 4
cc:
Mr. G. Maxwell W/A Mr. V. Stello (2) W/A 8208200039 820730 PDR ADOCK 05000400 S
PDR 411 Fayetteville Street e P. O. Box 1551
- Rafeigh, N. C. 27602 ' OFFICIAL CO
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t CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PIANT f
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UNIT NO. 1 1
1 INTERIM REPORT July 16, 1982 Reportable Under 10CFR50.55(e)
Reportable Under 10CFR21 I
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DEFECTIVE VALVE' SPRINGS 0N/ DIESEL ENGINES l
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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 sets purchased under Purchase Order NY-435079 from Transamerica DeLaval, Inc.
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 relicve external stresses incurred in cold-woring 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 l
REPORTED:
August 28, 1981 - CP&L (L. E. Jones) notified the NRC, j
Region II, (R. Butcher) that this item was reportable l
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.
SAFETY IMPLICATION:
The diesel engine-generator sets 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 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.
The valve springs will be replaced when the engines are installed on their foundations.
Valve spring change-out requires the ability to bar the engine over, which cannot be accomplished until the engine is sitting on its foundation with the flywheel installed.
The engines are currently in storage and are expected to be set on their foundations in August 1982.
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 have not yet been installed on their fcundations as was previously expected.
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 October 19.82.
.