ML20053C102
| ML20053C102 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 05/18/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8206010489 | |
| Download: ML20053C102 (2) | |
Text
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May 18, 1982
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4 b,. g g BLRD-50-438/81-16 BLRD-50-439/81-16 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - REACTOR BUILDING COOLING FANS -
BLRD-50-438/81-16, BLRD-50-439/81 SIrrH INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. W. Wright on January 28, 1981 in accordance with 10 CFR 50.55(e) as NCR 1351. This was followed by our interim reports dated February 27, June 2, September 3, and December 16, 1981 and February 17, 1982. Enclosed is our sixth interim report. We expect to submit our next report by November 23, 1982. We consider 10 CFR Part 21 to be applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with R. H. Shall at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY CMmn~p2 L. M. Mills, Manager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. James McFarland (Enclosure)
Senior Project Manager Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 5206 010 Y84 0
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~LA An Equal Opportunity Employer
o-ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 REACTOR BUILDING COOLING FANS NCR 1351 BLRD-50-438/81-16, BLRD-50-439/81-16 10 CFR 50.55(e)
SIXTH INTERIM REPORT Description of Deficiency The reactor building cooling system consists of three integral fan cooling coil units as well as other equipment. Onsite inspection of the fan motors by a service representative of the motor manufacturer (Reliance Electric Motor Company, Cleveland, Ohio) revealed that old grease in the bearings had become hard and that grease was l'rced onto the motor winding when new grease was pumped into the bearings.
The Reliance service representative also witnessed the regreasing of the motor bearings. It was noted that grease easily purged out of the relief hole with the relief tubing disconnected; but when the tubing was reconnected, grease did not purge properly from the relief tubing.
Instead, it passed across the seal and onto the windings. This is because of the fact that the grease relief tubing in these fans is undersized. Also, these fans are required to receive semiannual maintenance to include the purging of bearing grease. This cannot be easily accomplished with the present cor. figuration of grease relief tubing.
The units were purchased from B&W.
Interim Progress A field change request (FCR) was generated on January 12, 1982, to document removal of the grease relief tubing. The tubing nas been removed and the grease relief holes have been plugged. All corrective action has now been completed except for clarification of lubrication requirements for the motors. TVA is awaiting a revised lubrication schedule from B&W.
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