ML20116F029
| ML20116F029 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 04/15/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NCR-2102, NCR-2285, NCR-2535, NUDOCS 8504300525 | |
| Download: ML20116F029 (2) | |
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TENNESSEE VALLEY AUTHORITY Y [h"es$nuf,Ytr"e b wer II 1S8 April 15,Ah.37 AIO! 2 2 30 BLRD-50-438/83-02 U.S. Nuclear Regulatory Commission Region II Attn: Dr. J. Nelson Orace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFONTE NUCLEAR PLANT UNIT 1 - FAILURE OF AIR COMPRESSOR MOTOR -
INGERSOLL RAND - BLRD-50-438/83 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on December 9, 1982 in accordance with 10 CFR 50.55(e) as NCR 2102. This was followed by our interim reports dated January 7 and May 26, 1983 and January 9 and October 3, 1984. Related NCRs 2285 and 2535 had also been reported and are now being included as part of this 50.55(e) concern. Enclosed is our final report.
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 J. W. Hufham, Manager Licensing and Regulations Enclosure 00: Mr. James Taylor, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure) l Institute of Nuclear Power Operations 1100 Circle 75 Parkway, suite 1500 Atlanta, Georgia 30339 k $hl38 8
PDR An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 FAILURE OF AIR COMPRESSOR MOTOR - INGERSOLL RAND NCRs 2102, 2285 AND 2535 BLRD-50-438/83-02 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency During performance of a functional test on stationary air compressor motor 1RJ-EMOT-002-B, the motor failed during an attempted restart. This is the second instance of this type of failure on this type and size motor.
Nonconformance reports (NCRs) 2285 and 2535 document the third and fourth failures, respectively, of the same size and type motor. Bellefonte Nuclear Plant (BLN) is the only TVA nuclear plant to use this size motor and system configuration.
The air compressors are in the compressed air system (RJ) and are also used to support construction activities.
The cause of this deficiency is attributed to adverse environmental conditions resulting from extended periods of construction activity in the area.
Safety Implications The motor failure rendered the air comprorsor of the compressed air system inoperable. This could adversely affect the ability of the essential air system to perform its intended function, which could adversely affect safe operation of the plant.
Corrective Action TVA is in the process of procuring replacement compressor motors that are class 1E, fan cooled, and totally enclosed. In addition, dedicated service air compressors are being installed to avoid using safety-related essential air compressors for construction service air requirements. Construction activities in the area of the motors have been greatly reduced; therefore, installation and operation of the replacement motors will be in an acceptable environment. A memorandum has been prepared by the construction superintendent reinstructing craft personnel that any work that creates an unclean environment in the air compressor areas will not be started until the affected compressor is tagged out and covered with plastic. The plastic will remain in place until such work is completed and the area is clean and dust free. BLN quality control procedure (QCF) 1 3, " Maintenance," requires that the motors be inspected on a periodic basis.
The replacement motors will be in place by October 23, 1985.
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