ML20070P512
| ML20070P512 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/17/1983 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8301260365 | |
| Download: ML20070P512 (3) | |
Text
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DUKE Pownn GOMPAhT P.O. IM)x 33180 citAHLOTTE, N.C. 28242 IIAI. II. Tt CKER res.epuuns vuerare.ocov (704) OTN538 January 17, 1983
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Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 g
Re:
Catawba Nuclear Station 5
3 Units 1 and 2 Docket Nos. 50-413 and 50-414 2
J-E
Dear Mr. O'Reilly:
Pursuantto10CFR50.55e,pleasefindattachedSignificantDeficienhReport SD 413-414/82-26.
e Very truly yours,
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Hal B. Tucker RWO/php Attachment cc: Director Office of Inspection and Enforcement U. S. le clear Regulatory Commission Washington, D. C. 20555 Mr. P. K. Van Doorn NRC Resident Inspector Catawba Nuclear Station Mr. Robert Guild, Esq.
Attorney-at-Law P. O. Box 12097 Charleston, South Carolina 29412.
Palmetto Alliance 2135h Devine Street Columbia, South Carolina 29205 n
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8301260365 830117 PDR ADOCK 05000413 S
Duke Power Company Catawba Nuclear Station Report Number: SD 413-414/82-26 Report Date: January 17, 1983 Facility: Catawba Nuclear Station, Units 1 and 2 Identification of Deficiency:
Transamerical Delaval, Inc. furnished four (4) diesels for the Catawba Nuclear Station with the possibility of residual stresses in the piston skirts, that in combination with the operating combustion stresses, could result in an engine failure. This deficiency was identified December 14, 1982 by Duke Power Company.
Initial Report:
On December 20, 1982, Mr. A. J. Ignatonis of the NRC, Region II, Atlanta, Georgia office was notified of this deficiency by Mr. W. O. Henry, Mr. J. M. Lines, and Mr. M. L. Childers of Duke Power Company, Charlotte, North Carolina 28242.
This notification was in response to Mr. R. A. Pratt's (Transamerica Delaval, Inc.) letter dated November 18, 1982 to Mill Power Supply Company.
Supplier and/or Component:
Transamerica Delaval, Inc. of Oakland, California, manufactured and supplied the piston skirts that are installed in the four Catawba diesels.
Description of Deficiency:
Forty-two (42) of the diesel piston skirts tnat were manufactured and supplied i
for the Catawbn diesel generators me" have residual heat stresses in the piston skirts as a result of the. method of heat treating used on these piston skirts between December 1978 and October 1981.
l The residual stresses, in combination with the combustion cycle stresses, could cause a cracking of the piston skirt where the piston crown is secured to the piston skirt with studs, and thereby cause a separation of the crown and piston skirt during operation. This situation could result in an engine failure.
Analysis of Safety Implication:
]
Based on the assumption that a separation of the crown and piston skirt could occur on the diesel and remain undetected, this situation could compromise the diesel generator's ability to provide emergency power as required.
Corrective Action:
The piston skirts were generically furnished to many utilities with the i
possibility of residual stresses. Transamerica Delaval, Inc. has recognized l
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this potential problem and has revised their procedure to include a different method of heat treating of the piston skirts to prevent a recurrence of this situation.
Transamerica Delaval, Inc. will also conduct extensive non-destructive testing on the forty-two (42) affected piston skirts and stress relieve as necessary and return the piston skirts to Catawba for reinstallation.
Any piston skirts which are found defective will be replaced.
The above corrective action is expected to be complete by June 1, 1983.
I