ML20079E281
| ML20079E281 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/09/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 83-02, 83-2, NUDOCS 8401170214 | |
| Download: ML20079E281 (2) | |
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I TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Ftreet Tower II January 9,1984 BLRD-50-438/83-02
.U.S. Nuclear Regulatory Commission Region II Attn: Mr.-James P. O'Reilly, Regional Administrator
'101 Marietta Street, NW, Suite 2900' Atlanta, Georgia 30303 l,
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT' 1 - FCLURE OF AIR COMPRESSOR MOTOR -
INGERSOLL RAND - BLRD-50 :138/83 7HIRD INTERIM 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 (Air. interim reports dated January 7 and May 26,.1983. Enclosed is'our. third interim report. iiCRs 2285 and 2535 have since been reported and are now being included as part of this 50.55(e): concern. We expect to submit 'our next report on or about OcNber 3,1984.
Ii' pu have any questions concerning this matter, please get in touch with R.-H.;Shell at FTS 858-2688.
Very traly yours, TENNESSEE VALLEY AUTHORITY L'. M. Mills,' Manager Nuclear Licensing
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Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
. Office of Inspection and Enforcement U.S. Nuclear Regulatory Commissioni Washington, D.C.
20555 r
Records Center (Enclosure)
Institute of. Nuclear Power Operations 1100 Circle-75 Parkway, Suite 1500 Atlanta, Georgia 30339
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- q 'e 1983-TVA 5OTH ANNIVERSARY
- An Equal Opportunity Employer
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ENCLOSURE t -
-o 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)
MIRD INTERIM REPORT Description of Deficiency During performance of a fbnctional test on stationary air compressor motor 1RJ-EMOI-002-B, the motor failed during an attempted restart. This was the second instates of this type of failure on this type and size motor (ncnconformance report 1942). NCRs 2285 and 2535 document the third and fourth failures respectively, of the samc size and type notor.
Bellefonte is the only TVA nuclear plant to use this size motor and sptem configuration.
Interim Progress TVA indicated in our previous report on this deficiency that the motor stators were to be returned to the vendor for rework. However, TVA has since determined that Class 1E motors will be used for this application end has initiated discussions with the vendoe and the n:otor manufacturers in order to secure 1E motors. Engineering change notice 1M6 has been approved to implement the motor rep 2 ace: ent. TVA is continuing to investigate the nonconformance to deteruine the root cause of the problem and the actions required to nrevent recurrence.
Based on the circumstances surrounding the fourth motor failure (NCR 2535),
recommendations were unde by TVA's Division of Engineering Design (EN DES) to TVA's Division of Construction (CONST) as follows:
(1) strict precautions should be taken to ensure cleanliness of the air compressor units and the areas surrounding the units and to ensure that introduction of water, either accidentally or intentionally, into the motors be prohibited, (2) temporary construction air compressors should be installed to supply service air requirements needed by TVA's Division of Nuclear Power, Also, additional control changes may be identified and implemented to prevent startup of the compressors while fully loaded.
. TVA will' examine its policies regarding guidance concerning the use of permanent, safety-related equipment for construction purposes. If it is determined that the root cause of all four motor failures can be attributed to premature and abusive operation as the result of improper guidance, policy changes will be made as required.
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