ML20058K785

Ro:On 740521,during Routine HPCI Sys Surveillance Testing, Turbine Auxiliary Oil Pump Could Not Start.Investigation Revealed That Oil Pump Motor Acceleration Relay Auxiliary Contact Partially Dislocated

ML20058K785
Person / Time
Site:	Monticello
Issue date:	05/21/1974
From:	Larson C NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 9102140385
Download: ML20058K785 (1)

Text

,. , r--

' g.,

s o o n:.v. M : r n m s T AI E' E. P O .W:. E Pre C Oi M. P A .M'.Yf Waticello, . Nirmesota. 5536Z M y-21~, 1974 Mr. J. Gi. Keppler, Regional Director Directorate of Regulatory Operations Itegion III United. States Atomic Energy-fhnission.

799 Roosevelt Road Glest Ellyn,. Illinois 61037 ,

Dear Mr. Keppler,

g)tnIr-pun P.v'rE>R GEMEATHZi PLA)(P Ibcket ?b. 50-263 License No. DPR-22 Inoperability of HPCI Amtiliray-Ull Pump Orr May 21,1974, during routine.HPCI:'systaa surveillitoce testir4, the turbine auxiliary oil pump could not be started. Investigation revealed:that the Cil pang zuotor acceleratiort. relay amtiliary contact was partially dislocated and thus preve.nting the tsain contactor from energizing.

The auxiliary contact was repaired and the oil puup successfully operated.

Youra very truly, P

C. E. Lars Plant 7tnager Northern States Ptmer Cer-ny CEL/kik oc; J F O' Leary G Chamoff Minnesota Pollution Contral' Agency Attn:. E A Pryrina 9102140385 740521 CF ADDCK 05000263 CF F,

J l

u

--