ML20210S246
| ML20210S246 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 09/22/1986 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 1986-003, 1986-3, SL-1290, NUDOCS 8610080056 | |
| Download: ML20210S246 (2) | |
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Georgia Fbwer Company 333 Piedmont Avenue Atlanta, Georg:a 30308 Telephone 404 526 6526 Maihng Address:
Fbst Office Box 4545 Atlanta, Georgia 30302 h
06 SEP26 A9: ag Georgia Power L T. Cucwa the SOuthem ehtinc system Manager Nuclear Safety and Licensing SL-1290 0166C September 22, 1986 U. S. Nuclear Regulatory Commission
REFERENCE:
Office of Inspection and Enforcement RII: JNG Region II - Suite 2900 50-321 101 Marietta Street, NW Special Report Atlanta, Georgia 30323 1986-003 ATTENTION: Dr. J. Nelson Grace Gentlemen:
Enclosed is Special Report Ho. 50-321/1986-003.
This report is required by Hatch Unit 1 Technical Specifications Section 3.13.2 Action b.1 Hatch Unit 2 Technical Specifications Section 3.7.6.1 Action b.2.c.
Sincerely,
- ~;2_ : -
L. T. Gucwa LGB/lc Enclosure c: Mr. J. P. O'Reilly Mr. J. T. Beckham, Jr.
Mr. H. C. Nix, Jr.
NRC Document Control Desk GO-NORMS 8610090056 860922 PDR ADOCK 05000321 S
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Georgia Power d Special Report 50-321/1986-003 (Enclosure to SL-1290)
LICENSEE:
GEORGIA POWER COMPANY ET AL FACILITY NAME:
EDWIN I. HATCH Unit 1 DOCKET NUMBER:
50-321 On 9/7/86 at approximately 0230 CDT, with Unit 1 at 2436 MWt (approximately 100 percent of rated thermal power) and Unit 2 at 1902 MWt (approximately 78 percent of rated thermal power), the volume in both fire protection water storage tanks dropped to less than 270,000 gallons. The Technical Specifications for Unit 1 (3.13.2.b) and Unit 2
( 3. 6. 7.1. b) require the minimum volume in each tank to be 170,000 gallons.
The low tank level was caused by the activation of the deluge valves on the south end of the IB cooling tower. This activation caused a low fire water pressure condition, which automatically started the diesel fire pumps. The level in both fire protection water tanks dropped below the Technical Specifications limit before the deluge valves could be isolated.
The level in both fire protection water tanks was returned to within Technical Specifications limits in approximately 30 minutes.
Maintenance personnel investigated the event and determined that the IB cooling tower south end air compressor had f ailed. This compressor supplies air to the fire suppression valves. As the air supply decreased, the deluge valves activated, as designed.
The air compressor was repaired and the fire protection system was returned to normal at 0445 CDT on 9/7/86. Additionally, plans are currently in progress to improve and upgrade the existing cooling tower fire prctection installations.
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