ML20211B169
| ML20211B169 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 05/29/1986 |
| From: | Watson R CAROLINA POWER & LIGHT CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-454, REF-PT21-86, REF-PT21-86-249-000 223, PT21-86-249, PT21-86-249-000, NUDOCS 8606110497 | |
| Download: ML20211B169 (4) | |
Text
TynB Cp&L Carolina Power & Light Company r< ovmwaw om,=,- z:-rx~- +--
3 J "l-l 2 pp.n HARRISNUCLEARPR03ECF0 P. O. Box 165 New Hill, North Carolina 27562 MAf g g ;333 File Number: SHF/10-13510E NRC-454 Letter Number: HO-860305 (0)
Dr. J. Nelson Grace United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30323 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 STANDBY DIESEL GENERATOR - INTAKE AND EXHAUST VALVE SPRINGS, ITEM 223
Dear Dr. Grace:
Attached is our final report on the subject item, which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21 on February 12, 1986. With this report, Carolina Power & Light Company considers this matter closed.
l If you have any questions regarding this matter, please do not hesitate to contact me.
Yours very truly, 2 0 &la w l
R. A. Watson l
Vice President Harris Nuclear Project RAW /Ime Attachment cc: Messrs. C. Maxwell (NRC-SHNPP)
J. M. Taylor (NRC) g6110497860529 ADOCK 05000400 g
PDR MEM/Ho-8603050/ PACE 1/0S1
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CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT 1 FINAL REPORT i
EMERGENCY DIESEL GENERATOR ENGINES 4
INTAKE AND EXHAUST VALVE SPRINGS ITEM 223 MAY 27, 1986 REPORTABLE UNDER 10CFR50.55(e) AND 10CFR50, PART 21 4
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l MEM/HO-8603050/ PACE 3/OSI
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SUBJECT:
Shearon Harris Nuclear Power Plant, Unit No. 1, 10CFR50.55(e) and 10CFR, Part 21, reportable deficiency.
Emergency diesel engine intake / exhaust valve springs.
ITEM:
Engine IA-SA (TDI Serial No. 74046) has 4 subject springs per cylinder, except cylinder L-3 has none. Engine IB-SB (S/N 74047) has 2 subject springs in cylinder R-2 and 3 subject springs in cylinder R-3.
SUPPLIED BY:
l Transamerica Delaval, Inc., Engine and Compressor Division, 550 85th Avenue, Oakland, CA 94621.
NATURE OF DEFICIENCY:
NCR-85-2143 documents that springs manufactured by Betts Spring Company, San Leandro, CA, may have been provided. These springs have failed in commercial applications in as little as 200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> of operation, and failure would lead to engine inoperability.
Upon inspection, springs supplied by Betts Spring Company were supplied as described under " Item" above. Evaluation provided by TDI states that failure to adequately shot peen the springs resulted in failure.
DATE PROBLEM OCCURRED:
NCR-85-2143 was written November 18, 1985. This NCR was based or correspondence from TDI dated November 6, 1985.
DATE PROBLEM REPORTED:
On February 12, 1986, Mr. N. J. Chiangi notified the NRC (Mr. P.
Fredrickson) of a reportable item per the provisions of 10CFR50.55(e) and 10CFR, Part 21.
SCOPE OF PROBLEM:
See " Item" above.
SAFETY IMPLICATION:
Failure of these springs could cause engine inoperability.
l MEM/HO-8603050/ PACE 4/0S1
i REASON DEFICIENCY IS REPORTABLE:
The cause(s) of the previous failures is now known. Evaluation indicates the cause to be inadequate shot peening. Since the springs cannot be nondestructively tested, we must assume that the springs supplied are deficient and failure would lead to engine inavailability.
CORRECTIVE ACTION:
The intake / exhaust valve springs for Diesels lA-SA and IB-SB have been replaced with acceptable springs. Based on completion of this action, this is our final report on this item.
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MEM/HO-8603050/ PACE 5/OSI
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