ML20085G447
| ML20085G447 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 10/05/1973 |
| From: | Eric Thomas TENNESSEE VALLEY AUTHORITY |
| To: | Oleary J US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| AO-BFAO-7316W, NUDOCS 8308290091 | |
| Download: ML20085G447 (2) | |
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u Ib ~m>\\ r -\\ tuI 14r. John F. O' Leary, Director '\\ Directorate of Licensing M-Office of Regulation hA. '\\ U.S. Atccie Energy Connicsion T/ Washington, DC 20545 Dear 11r. O'Inary. TrLT.iCSSE3 VALLEY AUTEORITY - E2C'!KS FC'tRY HUCLEldt PLCf U::IT 1 - DOCiO.:T NO. 50-259 - FACILITY OPER.3.TlHG LICECSr.; DPR AEI:CReAL OCCUR {E.:C2 RAPORT EFAO-7316W The purpoco of thie report is to provide details concerning the failure of the ctack gas monitor. This occurrence vac reported to W. S. Little by telephone on September 27,19'/3, and by telegram to the Region II Directorate of Regulatory Operations on Septenber 28, 1973 D2scrintion of the Incident At 6 p.u. on septe=ber 26, 1973, while the operator was invecti atinS 6 the cause of the alara " Stack Gar Flow Abnormal," he dicccvered tr.at etack gas renitor A ptrnp notor had failed, vnich stopped cample flov to the nonitor. When he attempted to start B cample pump, it would not start. Further investigation showed the pover cupply fuse which supplies both pumps had blova. The fute was replaced and E pump vas placed in cervice. The reactor was operating at 150-psig pressure during low-power startup testing. Invectication and Corrective Action The stack gas monitor has two cumple pumps, one of which must operate continuoucly. Eoth pumps are cupplied fro.n a cingle ccurce of pcVer through one 20-tsp fuce and a pump cclectcr cuitch. The pump motor failure was due to a bad cotor bearing which caused motor overload and overheating which reculted in vinding failure. The motor vce replaced and the system returned to normal operation. y .(\\ G4 s . E.a a s ( t\\ )k'Y b / 8308290091 731005 f l PDR ADOCK 05000259 S PDR Cun Rn 11G10h_ 2 . <.1,< 0 t
~ D O 2 Mr. John F. O'Irary October 5, 1973 TEN!! DSS'JE VliT.I.i?l /JIIEORITY - Eh0'.CS FrJtRY I':UCIS/Jt PIZ:T U:ilT 1 - DCCKET I:0. 50-259 - FACILITY OPERATI;;G LICE::SE DPit la::CID E CCCURRE: ICE R5PCdf eft.0-73164 Increated frequency of inspectica was bcGun which chould det/ct totor bearing or other failure in early steges. The circuit is being redecicned to improve tne po'.:cr rupply. Very truly youra, TSNN:JSCES VAIE AUTEORITY s.) .W E. F. Tnoc.ns Director of Fower Production t CC: Isr. I:orr.nn C. ::oceley, Director IMgion II Regulatog Operations Office,'USAEC 250 Pc;c::Lree d reet, 4 ?. '. Atlanta, Georcia 30303 s L}}