ML20085M185

AO BFAO-745W:on 740117,during Routine Surveillance Testing of Standby Liquid Control Sys,Shaft Seal Packing on Standby Liquid Control Pump 1B Leaked Excessively.Caused by Failed Packing.Packing Replaced

ML20085M185
Person / Time
Site:	Browns Ferry
Issue date:	01/25/1974
From:	Eric Thomas TENNESSEE VALLEY AUTHORITY
To:	Oleary J US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20085M189	List: ML20085M185 ML20085M192
References
AO-BFAO-745W, NUDOCS 8311080099
Download: ML20085M185 (2)

Text

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TENNESSEE CHATTANOOGA, VALLEYTENNESSEE AUTHORITY , t**pq .

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• j MJ Januaq 25, 1974 ANNtvrASAAY gggafgy d[3v,4 N' r M b$5~' N

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Mr. John F. O' Leary, Director '

Directorate of Licensing Office of Regulation *

.,U.S. Atomic _ Energy Comission Washington, DC 20545

Dear Mr. O' Leary:

TEITESSEE VALLEY AUTHORITY - BROWS FERRY HUCLEAR PLANT UNIT 1 -

DOCKET E0. 50-259 - FACILITY OPERATING LICENSE DPR ABNORMAL OCCURREIICE REPORT 3?AO-745W The enclosed report is to provide details concerning the shaft sec1 packing en 1B SLC puro which leaked excessive 2,y during routine surveillance testing of the standby liquid control system which occurred on Browns Ferry Huclear Plant unit 1 on Jcnuary 17, 1974, and is submitted in accordance with Appendix A to Regulatory Guide 1.16, '

Revision 1, Octo~oer 1973.

Very truly yours, TEmiESSEE VALLEY AUTHORITY 'IE*D.?

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- .- 4 ABNORI'JJ., OCCURREiCE REPORT Report No.: BFAO-745W Report Date: January 25, 1974 Occurrence Date: January 17, 1974 Facility: Browns Ferry Nuclear Plant unit 1 Identification of Occurrence

~During- routine.: surveillance , testing .of the < standby ,11 quid . control- system, the shaft seal packing on 13 SLC pu=p leaked excessively.

Conditions Prior to Occurrence Reactor was at 50-percent power.

Description of Occurrence During the performance of a routine surveillance test on January 17, 1974, testing was terminated when the shaft seal packing .on standby liquid control pu=p 13 started leaking excessively. T- ediately preceding this, pump 1A had been surveillance-tested satisfactorily.

Analysis of Occurrence It is cost probable that the 13 pu=p would have =et its specified' require =ents. had the test been continued. The excessive leakage was confined to one of the three pump piston plungers. However, it was reported as an abnormal occurrence because it could be interpreted as threatening to cause the feature to be unabic to p'erform its intended function. Redundant pu=p 1A tested satisfactor'ily.immediately preceding this occurrence and would have performed satisfactorily if called on.

Corrective Action The failed packing in SLC pu=p 13 was replaced as specified in the manufacturer's manual. Packing was inspected in SLC pu=p 1A and partiaDy replaced and adjusted.

Failure Data Manufacturer--Union Pu=p Co=pany, Battle Creek, Michigan Sizeandtype--l-7/8x3,TD.60 Serial No.--274716 Pu=p RPM--520 Capacity, ' GPM--50 Suction pressure, psi--O Discharge pressure, psi--1,500 '

Item No.--BF-1-11 2, TVA-1~ "

Service--Sodium Pentaborate Solution .

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