ML20112D062
| ML20112D062 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 12/21/1984 |
| From: | Nix H GEORGIA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 50-321-1984-011, 50-321-1984-11, GM-84-1151, NUDOCS 8501140041 | |
| Download: ML20112D062 (2) | |
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Georgi 3 Power Company
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Post Offico B;x 439 Baxt:y, Georgia 31513
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Telephone 912 367 7781 912 537-9444 g. !G * ' ' '
tj DEC'd Al GeorgiaPbwer Edwin 1. Hatch Nuclear Plant December 21, 1984 GM-84-1151 PLANT E.
I. HATCH Special Report Docket No. 50-321 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region II Suite 2900 101 Marietta Street, NW Atlanta, Georgia 30323 ATTENTION:
Mr. James P. O'Reilly Attached is Special Report No.
50-321/1984-011.
This report is required by Hatch Unit 1 Technical Specifications Section 3.13.2, ACTION b.1 and Hatch Unit 2 Technical Specifications Section 3.7.6.1 ACTION b.2.c.
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C. Nix General Manager HCN/TLE/v12 xc:
R. J. Kelly R. E. Conway J. T. Beckham, Jr.
P. D. Rice K. M. Gillespie Superintendent of Regulatory Compliance R. D. Baker Control Room Document Control O$00$$hg PDR OmCIAL COPY
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o' SPECIAL REPORT 50-321/1984-011 LICENSEE
- GEORGIA POWER COMPANY FACILITY NAME
- EDWIN I. HATCH DOCKET NUMBER
- 50-321 On December 11,.1984, at approximately 0620 CST, with Unit 1 in cold shutdown'in a refueling outage and Unit 2 in steady-state operation at 2420 MWt (approximately 100% power), both deluge valves actuated on the south end of the 1B cooling tower.
This caused a low fire water pressure on the fire water system which automatically started both
' diesel fire pumps; the electric fire pump was out of service for maintenance.
Before plant personnel could isolate the activated
- deluge valves, the volume in each of the two fire water storage tanks' dropped to less than the 270,000 gallons requirement of Unit 1 Tech.
Specs. section 3.13.2.b and Unit 2 Tech. Specs. section 3.7.6.1.b.
Both deluge valves on the south end of the 1B cooling tower actuated on loss of control air for the following reason:
I While personnel were backfilling reactor water level instrument legs in preparation for performing the " INTEGRATED ECCS RESPONSE TEST" procedure HNP-10976 a LOCA logic actuation occurred.
The LOCA logic actuation resulted in load ~ shedding of the cooling tower air compressors.
Loss of the 1B cooling tower south end air compressor and small air leaks caused both the 1B south end deluge valves to actuate on loss of control air.
j All cooling tower air compressors which were tripped due to load
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shedding were returned to service on 12/11/84.
- Also, on-going-Maintenance Work Orders are in progress to identify (snoop) and repair air leaks on cooling towers-deluge systems.
Both fire protection water storage tanks were returned to within the Tech.-Specs. limits of greater than 270,000' gallons in approximately 1
. hour.
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