ML20133P316

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Special Rept 50-321/1985-002:on 850706,vol in Both Fire Protection Water Storage Tanks Dropped to Less Then 270,000 Gallons.Caused by Activation of Deluge Valves on Cooling Tower 1C.Both Tanks Were Returned within Limits
ML20133P316
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 07/08/1985
From: Nix H
GEORGIA POWER CO.
To: Grace J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
50-321-1985-002, 50-321-1985-2, NUDOCS 8508140259
Download: ML20133P316 (1)


Text

,e 01BAXLEY, GEORGIA 31513 PMS DR. J. NELSON GRACE UNITED STATES NUCLEAR REGULATORY COMMISSION DIRECTION OF INSPECTION AND ENFORCEMENT REGION II, SUITE 3100

[$

101 MARIETTA STREET c-ATLANTA, GEORGIA 30303 f3 5

v

SUBJECT:

Hatch Unit 1 Docket No. 50-321, Notification of Special Report 50-321/1985-002 e.a DATE:

July 8, 1985 NOTIFIED:

By Red Phone 03 DATE July 6, 1985 TIME DESCRIPTION OF EVENT:

On July-6,'

1985, at approximately 0500
CDT, with Unit 1

in steady-state operation at approximately 1390 MWt (approximately 57%

power) and Unit 2 in steady-state operation at approximately 2432 MWt (approximately 100% power), the volume in both fire protection water storage tanks dropped to less than 270,000 gallons.

On July 6,

1985, at approximately 0450
CDT, the deluge valves activated on 1C cooling tower.

This caused a low fire water pressure on the fire water system which automatically started the electric fire pump and one diesel fire pump.

Before the activated deluge valves could be isolated, the fire protection water storage tanks' volume dropped to less than 270,000 gallons.

The requirement of Unit 1 Tech.

Specs. section 3.13.2.b and Unit 2 Tech. Specs. section 3.7.6.1.b was exceeded before the activated deluge valves could be isolated.

Both fire protection water storage tanks were returned to within Tech.

Specs.

limits of greater than 270,000 gallons in approximately 45

ninutes, j'

l'

[U c a.t a,

,h EI.' C.

Nix General Manager J

HCN/SBT/djs 8508140259 850708 PDR ADOCK 05000327 S

PDR i0 g ),d,

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