ML20033B592
| ML20033B592 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 11/25/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8112010550 | |
| Download: ML20033B592 (2) | |
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U TENNESSEE VALLEY AUTHORITY IDRO CH ATTANOOGA, TENNESSEE 374ot 4
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j November 25, 1981 BLRD-50-438/81-71 l.
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Mr. James P. O'Reilly, Director
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Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission M NOV3 01981* o, Region II - Suite 3100 ya.gg -.]
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Atlanta, Georgia 30303
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Dear I'r. O'Reilly:
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'BELLEFONTE NUCLEAR PLANT UNIT 1 - SCORE MARKS ON COMPONENT COOLING WATER PUMP SHAFT - BLRD-50-438/81 FIRST INTERIM REPORT The~ subject deficiency was initially reported to NRC-OIE Inspector R. V. Crlenjak on October 27 1981 in accordance with 10 CFR 50.55(e) as 3
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NCR 1621. Enclosed is our first interim report. We expect to submit our next report by January 26, 1982. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L.
. Mills, Manager Nuclear Regulation and Safety Enclosure cc:
Mr. Victor Stello, Jr., Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 i
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s An Equal Opportunity Emp!ayer
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o ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 SCORE MARKS ON COMPONENT C00 LINO WATER PUMP SHAFT BLRD-50-438/81-71 10 CFR 50.55(e)
FIRST INTERIM REPORT-Description of Deficiency During routine inspection after installation, the CCW pump shaft was found to exhibit circumferential score marks on the thrust bearing end of the shaft under the journal bearing. The apparent cause of the deficiency is a lathe operator error.
Interim Progress An onsite vendor representative was consulted, and he immediately recommended replacement of the shaft. The pump we.s disassembled, and the deficient shaft was removed. The shaft was sent back to the vendor (Hayward-Tyler pump manufacturers of Burlington, Vermont) for replacement.
(Note that B&W of Canada, Limited, Ontario, was the original supplier; however, they were sold to Hayward-Tyler Pump manufacturers since the issuance of the contract.) The replacement shaft arrived onsite and was inspected on October,26,1981. Since the deficiency degrades a critical element of the subject pump, the vendor's quality assurance program should have rejected the affected shaft per NDE (visual) inspection. TVA is evaluating the vendor's QA program to determine the actions necessary to prevent recurrence of this deficiency.
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