ML20045C921

Special Rept 93-06:on 930511,HPFP Sys Operated W/Only One Operable HPFP Pump for Period,Exceeding TS 3.7.11.1 Allowable Timeframe Due to Maint.Dg 2A-A Returned to Svc on 930519 & EP Supply Reestablished to 2A-A HPFP Pump

ML20045C921
Person / Time
Site:	Sequoyah
Issue date:	06/17/1993
From:	Fenech R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
93-06, 93-6, NUDOCS 9306250099
Download: ML20045C921 (3)

Text

1 l _ _ _ . . _ . _ _ _ . . _ . . . _ _ _ ____ _ _ . - . . _ . _ _ - _ . _ . - ~ . _ . . . . _ - _..

l

! Tennessee Valley Authonry. Post Offre Box 2000. Soddy.Darsy. Tennessee 37379-2000 1

Robert A. Fenech vee Piesident, Sequoyah Nuclear Plant June 17, 1993 U.S. Nuclear Regulatory Commission i ATTN: Document Control Desk  ;

l Washington, D.C. 20555 '

l l

Gentlemen: I l

In the Matter of ) Docket No. 50-327 Tennessee Valley Authority ) ,

i l

StQUOYAH NUCLEAR PLANT (SQN) - UNIT 1 - FACILITY OPERATING LICENSE DPR TECHNICAL SPECIFICATION (TS) 3.7.11.1 SPECIAL REPORT 93-06

! The enclosed special report provides details concerning the high-pressure l fire protection (HPFP) system operating with only one operable HPFP pump l for a period of time that exceeded the TS 3.7.11.1 allowable timeframe.

The enclosure contains details of this condition.

This report is beir- . tted in accordance with TS 3.7.11.1 Action Statement (a).

If you have any ques th... ncerning this submittal, please telephone C. H. Whittemore at (615) < 3-7210.

Sincerely, f l" Mk Robert A. Fenech

, Enclosure l

cc: See page 2 i l kliOO1] f 9306250099 930618 PDR ADOCK 050003A7 " id A

t/

/

P PDR f)

- 96 0.S. Nuclear Regulatory Commission Page 2 June 17, 1993 cc (Enclosure):

Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 l Atlanta, Georgia 30323-2711 l l

1 I

l

• • A.

ENCLOSURE

, SEQUOYAH NUCLEAR PLANT UNIT 1 SPECIAL REPORT 93-06 ,

FIRE PUMPS OUT OF SERVICE Descriplion of Condition l On May 11,1993, at 0802 Eastern daylight time (EDT), Limiting Condition i for Operation (LCO) 3.7.11.1 was entered because only one of four i high-pressure fire pumps (HPFPs) was operable. One pump was inoperable because of an inoperable motor, and two other pumps were administrative 1y declared inoperable because their emergency power supply was unavailable as a result of scheduled maintenance. The normal power supply to these I two pumps was always available. Action Statement LCO 3.7.11.1.a requires  !

the inoperable equipment to be restored to service within seven days. l The extent of the maintenance prevented any of the three inoperable fire  !

pumps from being returned to operable status as defined by the technical i specifications within the seven-day timeframe.

Carrectiva_Antinn l With less than the minimum HPFP pumps operable as defined in the TSs, Operations personnel appropriately entered LCO 3.7.11.1. Fire Operations personnel were prepared to connect an auxiliary fire suppression pumper j to the fire protection system, taking suction from the intake in the l event of a fire. The normal power supply for the HPFP pumps was always available. Therefore, two additional pumps could have performed their intended f unction, if needed. The 2A-A diesel generator was returned to service at 2335 EDT on May 19, 1993, reestablishing the 2A-A HPFP pump emergency power supply. LCO 3.7.11.1 was exited on May 20, 1993, at 0601 EDT after the completion of the test verifying operability of the HPFP pump.

N