ML19259A864

LER 78-104/03L-0 on 781213:while Performing Operations Surveillance Test F-ST-76C,indicated Volume of Diesel Fuel Oil at Hand Was Below Tech Spec Minimum.Caused by Erroneous Initial Fuel Capacity Readings & Calculations

ML19259A864
Person / Time
Site:	FitzPatrick
Issue date:	01/08/1979
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19259A863	List: ML19259A862 ML19259A864
References
LER-78-104-03L, LER-78-104-3L, NUDOCS 7901110102
Download: ML19259A864 (2)

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ATTACllMENT TO LER 78-104/03L-0 Page 1 of 1 During normal plant operation, while performing Operations Surveillance Test F-ST-76C titled Diesel Fire Pump Operational Check, the indicated volume of fuel oil on hand at the completion of th test was 147 gallons. This is contrary to the Technical Specification Appendix A, Paragraph 4.12.A.1.h which specifies a minimum of 172 gallons.

Failure to maintain adequate fuel supply for the Diesel Engine driven fire pump would require the pump to be declared inoperable and would limit the liigh Pressure Water Fire Protection System's ability to provide a water source for an extended time period if the redundant electric motor driven pump was also impaired or made inoperabic at the same time.

Subsequent investigation indicated that the initial fuel capacity readings and calculations were apparently in error and that the actual volume of fuel on hand was approximately 225 gallons. This was confirmed when the fuel tank was refilled and required approximately 50 gallons to completely fill thc 225 gallon tank. Since the precise mechanism which resulted in the low fuel readings could not be determined, the plant staff will carefully review the test data for subsequent tests until reliability of the indication is established.