ML20027B774
| ML20027B774 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 09/21/1982 |
| 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 8209300136 | |
| Download: ML20027B774 (2) | |
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t ENNESSEE VA'LLEY AUTHORITY CH ATTANOOG A. TENNESSEE 37401 400 Chestnut Street Tower II September 21, 1982 BLRD-50-438/82-60 U.S. Nuclear Regulatory Connission Region II M
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Mr. James P. O'Reilly, Regional Administrator m
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> 2" 101 Marietta Street, Suite 3100 4
Atlanta, Georgia 30303 5$
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Dear Mr. O'Reilly:
r^ 'D BELLEFONTE NUCLEAR PLANT UNIT 1 - WESTINGHOUSE I.0W VOLTAGE SWITCHGEAR ;-
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2 BLRD-50-438/82 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector Don Quick on August 23, 1982 in accordance with 10 CFR 50.55(e) as NCR 1948. Enclosed is our first interim report. We expect to submit our next report by April 6, 1983 If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, i
TENNESSEE VALLEY AUTHORITY
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L. M. Mills, nager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D,C.
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An Equal Opportunity Employer
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'o ENCLOSURE BELLEFONTE NUCLEAR PLANT UNIT 1 WESTINGHOUSE LOW VOLTAGE SWITCHGEAR NCR 1948 BLRD-50-438/82-60 10 CFR 50,.55(e)
FIRST INTERIM REPORT Description of Deficiency The affected low-voltage switchgear was supplied by Westinghouse, Pittsburgh, PA.
During a test of the HVAC chilled water pump, the 1EX2-A switchgear failed to trip when power was lost inadvertently. Upon restoration of power, the pump motor was activated without benefit of component cooling water or lubricant because the Icw-voltage switchgear associated with these systems did trip thereby preventing unintentional re-energization. Consequently, the HVAC chilled water. pump was burned out.
A preliminary investigation revealed that the probable cause of the deficiency was - the insertion of a DC fbse block incorrectly in the low-voltage switchgear. The incorrect configuration resulted in an open circuit which, in turn, prevented the switchgear from tripping.
Interim Progress TVA is evaluating the deficiency to determine the appropriate corrective action, root cause, and actions required to prevent recurrence.
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