0CAN129002, Special Rept:On 901026,fire Pump Inoperable for More than 7 Days.Temporary Pump Installed as Backup

Special Rept:On 901026,fire Pump Inoperable for More than 7 Days.Temporary Pump Installed as Backup

ML20065L802
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/03/1990
From:	James Fisicaro ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
0CAN129002, CAN129002, NUDOCS 9012100106
Download: ML20065L802 (2)

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OS' erations +. ->w y q. m m December 3, 1990 DCAN129002 U. S. Nuclear Regulatory Commission Document Control Desk Mail Station P1-137 4 Washington, D.C. 20555 SUBJCCT: Arkansas Nuclear One - Units 1 and 2 Docket Nos. 50-313 and 50-368 License Nos. DPR-51 and NPF-6 Special Report Concerning Inoperability of a Fire Pump

, Gentlemen:

In accordance with ANO-1 Technical Specifications 3.17.2 and 6.12.5 and ANO-2 Technical Specifications 3.7.10.1 and 6.9.2, a Special Report is being submitted concerning inoperability of a fire pump for more than seven days. This report addresses the cause of the inoperable condition and the plans and procedures to be used to provide for the loss of redundancy in the fire suppression water system.

The fire protection water supply for ANO Units 1 and 2 consists of one 2,500 gpm automatic electric motor driven pump (P60 and one 2,500 gpm automatic diesel engine driven pump. Each pump h ',rdividually capable of providing full flow required for proper fire supps ssion water system operation.

At 1430 on October 26, 1990, the electric motor driven fire pump (p6A) was declared inoperable and Technical Specification action statements 3.17.2 and 3 7.10.1.a were entered for Unit 1 and 2 respectively. The "C" service water bay was being drained down to perform maintenance and modification work for the Unit I refueling outage; therefore, the water source for P6A was unavailable. The work in "C" service water bay was initially scheduled to be complete within seven days; however, the work took longer than expected and the seven days allowed by the Technical Specifications expired at 1430 on November 2, 1990. The electric motor driven fire pump (P6A) was restored to an operable condition at 0553 on November 7, 1990, 9012100106 o01:03 ' f, @

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Ouring the' time the electric motor driven pump (P6A) was inoperable, the i diesel engine driven fire pump was operable and a temporary electric fire 1 pump was available to provide for the loss of redundancy in the fire suppression water system. The temporary pump had been installed to provide

, a heat sink for spent fuel pool cooling while both loops of service water were out of service during the Unit I refueling outage and the fire i suppression piping had been interconnected with the intermediate cooling l water system. This pump is capable of providing full flow required for proper fire suppression water system operation. To ensure that sufficient l water is available for fire suppression during a loss of offsite power, '

special work plan 1409.245(ANOUnit1ServiceWaterandAuxiliaryCooling  :

Water Chemical Cleaning) was revised to include provisions for isolating the additional demands on the fire suppression water system in the event of ,

a Unit 1 or.2 fire alarm. This procedure could also be used to ensure suf ficient water is available for fire suppression with P6A inoperable.

The temporary fire pump and associated procedures provided sufficient redundancy in the fire suppression water system until the electric motor driven pump (P6A) was restored to operability. Should you have any questions, please contact me at (501) 964-8601.

a Very truly yours,

s - E -i.

es J. Fisicaro Manager, Licensing d1 v

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JJF/GRA/mmg cc: Regional Administrator Region IV U. S. Nuclear Regulatory Commission 611~Ryan Plaza Drive,-Suite 1000 Arlington .TX 76011 INPO Records Center Suite 1500 1100 Circle, 75 Parkway 1 Atlanta, GA 30339-3064 b: ,

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