ML20091M373
| ML20091M373 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 05/24/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-219, REF-PT21-84-284-000 110, PT21-84-284, PT21-84-284-000, NUDOCS 8406110266 | |
| Download: ML20091M373 (4) | |
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,s Cp&L CaroIIna Power & Light Company h hj Q t $MyE
.L V%~ 'nea P. O. Box 101, New Hill, N. C. 27562 May 24,1984 Mr. James P. O'Reilly NRC-219 United States Nuclear Regulatory Commission Region II l
101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30303 1
CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 POTENTIAL DEFECT IN PETON SKIRT CASTINGS ON THE EMERGENCY DIESEIr-ENGINE GENERATOR SETS PURCHASE ORDER NY-435079, TrEM 110
Dear Mr. O'Reilly:
Attached is our third interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21, on December 16, 1982.
CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by December 18,1984.
Thank you for your consideration in this matter.
Yours very truly, Y
/
R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment ec:
Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) k O
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OFFICIAL CDP 50
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g; CAROLINA POWER & LIGHT COMPANY-SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 THIRD INTERIM REPORT EMERGENCY DIESEL-ENGINE GENERATOR SETS POTENTIALLY DEFECTIVE PISTON SKIRTS MAY 22, 1984 ITEM - 110 (DDR 1209)
REPORTABLE UNDER 10CFR50.55(e) AND 10CFR21 4
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SUBJECT:
Shearon Harris Nuclear Power Plant Unit No. 1 10CFR50-55(e) and 10CFR21 Reportable Deficiency.
j Potentially defective Piston Skirts for the Emergency Diesel-Engine Generator Sets. Purchase Order NY-435079.
r ITE4:
Piston skirts installed in the piston assembly of the emergency diesel-engine generator sets: S/N
-74046/47.
SUPPLIED BY:
Transamerica DeLaval, Inc., Oakland, California under CP&L Purchase Order NY-435079.
G NATURE OF DEFICIENCY:
Transamerica DeLaval,-Inc., shipped two dieael engines to Shearon Harris Site in May and June. 1981.
In November, 1982, Transamerica DeLaval notified CP&L that the engines have a potential problem with the piston skirts. Residual stress, caused by the method of heat treating, in combination with operating stress could cause cracking of the_ piston skirt during operation and if undetected could-result in engine failure.
DATE PROBLEM OCCURRED:
Refor to section above.
DATE PROBLEM REPORTED:
December 16, 1982, CP&L (N. J. Chiangi) notified the NRC (C. Hehl) that this item is reportable under the provisions of 10CFR50.55(e) and 10CFR21.
SCOPE OF PROBLEM:
This potential defect affects both emergency diesel engines purchased on NY-435079.
.' SAFETY '
IMPLICATION:
The diesel-engine' generator sets supply power to the ESF_
buses in the event that both normal on-site and off-site power _ sources are lost.
'The potential defect in th'e piston' skirts could affect engine operation and therefore affect.the availability emergency on-site power.
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' REASON DEFICIENCY IS REPORTABLE:
If left uncorrected, cracking of the piston skirts could result in the loss of the emergency on-site AC power supply.
CORRECTIVE ACTION:
The potentially defective piston skirts will be removed from the engines and sent to Transamerica DeLaval for non-destructive testing and stress relieving as necessary and then returned to the site. Defective piston skirts will be replaced.
FINAL REPORT:
Due to the extensive work involved to remove piston skirts, ship them back to vendor, have each skirt tested, have skirts or replacements returned to the site, a projected date for work completion and final report le December 18, 1984.
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