ML20081F255
| ML20081F255 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/26/1983 |
| 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 8311020403 | |
| Download: ML20081F255 (2) | |
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A TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower October 26, 1983 4 g',4 BLRD-50-438/83-25 BLRD-50-439/83-20 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - MANUAL ADJUSTMENT OF DIESEL I
GENERATOR SETPOINTS - BLRD-50-438/83-25, BLRD-50-439/83 SECOND INTERIM REPORT I
The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on March 9,1983 in accordance with 10 CFR 50.55(e) as NCR BLN EEB 8302. This was followed by our interim report dated April 6, 1983 Enclosed is our second interim report. We expect to submit our next 4
report by February 27, 1984.
If you have any questions, please get in touch with R. H. Shell at l
FTS 858-2688.
Very truly yours, l
TENNESSEE VALLEY AUTHORITY O(.k. wit i
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, D.C.
20555 i
Records Center (Enclosure) i Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 8311020403 831026
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PDR C5 1983-TVA SOTH ANNIVERSARY
/ l I
An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 MANUAL ADJUSTMENT OF DIESEL GENERATOR SETPOINTS BLRD-50-438/83-25, BLRD-50-439/83-20 10 CFR 50.55(e)
NCR BLN EEB 8302 SECOND INTERIM REPORT Description of Deficiency i
For the standby diesel generators at Bellefonte, there are manual voltage and frequency controls in the main control room which can adjust the voltage and/or frequency levels of one or more diesel generators to values below the ready-to-load set points used during the automatic start-automatic load sequence. Because the diesel generators lack an automatic reset capability for output voltage and frequency during automatic starts, low manual setting would prevent the misadjusted generator (s) from initiating the automatic load sequence. Also, since adjustments away from acceptable values are not alarmed, the misadjustment(s) could go undetected until after an automatic start is initiated.
Interim Progress TVA has contacted Delaval, the diesel generator vendor, concerning modifying the existing equipment and is awaiting a price quotation for the proposed. modifications.
TVA has reviewed this problem and has determined that no other TVA plant is involved. However, we are investigating the cause of the deficiency and actions required to prevent recurrence.
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