ML20246J280

Special Rept 89-07:on 890815-16,Limiting Condition for Operation 3.0.5 Entered Due to Inoperability of All Four Diesel Generators.Caused by Lack of Performance of Adequate Surveillance Test on Fuel Oil in 7-day Fuel Oil Tanks

ML20246J280
Person / Time
Site:	Sequoyah
Issue date:	08/28/1989
From:	Bynum J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
89-07, 89-7, NUDOCS 8909050107
Download: ML20246J280 (2)

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,U. 8 TENNESSEE VALLEY AUTHORITY 6N 38A Lookout Place August 28, 1989 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket Nos. 50-327 Tennessee Va13ay Authority ) 50-328 SEQUOYAH NUCLEAR PLANT (SQN) TECHNICAL SPECIFICATION (TS).3.7.11.1 SPECIAL REPORT NO. 89-07 On August 16, 1989, at 1109 Eastern daylight time (EDT), with bora units at 100 percent power, limiting condition for operation (LCO) 3.0.5 was entered because of inoperability of all four diesel generators. The diesel generators had been declared inoperable the previous day (August 15, 1989) at 1109 EDT because of lack of performance of an adequate surveillance test on the fuel oil in the 7-day fuel oil tanks; the extension afforded by Surveillance Requirement (SR) 4.0.3 was employed. LCO 3.0.5 was entered upon expiration of the 24-hour extension, since the surveillance test had not yet been completed. At that time, the four high-pressure _ fire pumps (HPFP) were accordingly declared inoperable, and action statement 3.7.11.1 was entered.

The surveillance test on the fuel oil was successfully completed, and the diesel generators and fire pumps were returned operable at.1451 EDT, August 16, 1989. Initial notification of the event was reported by telephone at 1457 EDT on August 16, 1989, in accordance with action statement b.2.a of TS 3.7.11.1 and confirmed by facsimile transmission on August 17,1989, in accordance with action statement b.2.b of TS 3.7.13.1.

Between 1109 and 1451 on August 16, 1989, the HPFPs were considered technically inoperable based solely on inoperability of their emergency power supply, the di-sel generators. During this period of time, TVA established a backup water supply system. This backup water supply consisted of a fire pumper truck taking suctiou from the intake and supplying water to the high-pressure fire system. When the diesel generators and fire pumps were declared operable shortly thereafter, the alternate water supply was disconnected.

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U.S. Nuclear Regulatory Comission '. August 28,' 1989 1

If you have any questions. concerning ~ this submittal, pleare telephone j M. A. Cooper at (615) 8h3-6651.

Very truly yours,

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. TENNESSEE VALLEY AUTHORITY. j i -

J. R. Bynum'  !

^Vice President--

Nuclear Power Production ~

.J cc: :Mr. S. C. Black, Assistant Director ,)

i for Projerets

..TVA Projects Division.

U.S. Noclear Regulatory Commission' ,

One White' Flint, North  !

L 11555 Rockville Pike  !

Rockville, Marylano 20852 i l

Mr. B. A. Wiison, Assistant Director. l for inspection Programs TVA Projects Division: i

. U.S. Nttelear Regulatory Comission i Region II 101 Marietta Street, NW, Suite 2900 Atlanta,' Georgia 30323-1 NRC Resident Inspector  !

Sequoyah Nuclear Elant l 2600 Igou Ferry Road.

Soddy Daisy, Tennessee 37379 s

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