ML19260D705

LER 80-006/01T-0:on 800123,during Testing of Diesel Generator D-21,ability to Reduce Generator Load from Control Room Was Lost.Caused by Loose Front End Shield on Governor Synchronizing Motor.Motor Replaced

ML19260D705
Person / Time
Site:	Prairie Island
Issue date:	02/06/1980
From:	Nunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19260D702	List: ML19260D701 ML19260D705
References
LER-80-006-01T, LER-80-6-1T, NUDOCS 8002110616
Download: ML19260D705 (1)

Text

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14 l'.* HE POH T D AT E 80 E0ENT DESCHIPTioN AND PROHAHLE CONSEQUENCES h'8 l 0 l 2 ] l During operability testing of D2 Diesel Generator, the ability to reduce generator l o 3 l load from the control room was lost. With the generator at 3000 kw a crankcase 1 0 4 l eductor supply hose came loose and the machine tripped on high crankcase pressure. l I

l0lsl l During operability testirig of other safeguards equipment, a jacket coolant hose on l O 6 INo. 12 Diesel Coolinn Water pump ruptured. A power reduction of Unit I was started!

O i l Unit 2 was in refueline shutdown. D1 Diesel Generator and No. 22 Diesel Coolinn O H nur Pump _were_ operable _thr_cunhout t h e_p_er.io d - I H0 SYSIE M C AUSE C AUSl COYP VALVE CODE CODE SUUCODE COYPONE NT CODE SUBCODE SU6 CODE

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i j o l l Loss of load control caused by loose front end shield on covernor synchronizing l l i l i l l motor: motor was replaced. Generator trip caused hv loss of eductor supply hose-  !

It 1/1 hose was tightly reinstalled. Pump iacket coolant hose was replaced. Inspection l l , I 31 l of cenerator i r r=s will b ra ndded to preventive 1,,fnten,nce procran. Pumn hoses I i 4 laro hoine roni, cod 1 H 9 RO STA S  % POW E R OTHEH ST A TUS ISCO FY DISCOVERY DESCTUPTION 1 5 lE @ l1 0l0l@l NA l l B l@l Operability test l A flVI T V CO TENT HFLE ASED Or HELE ASF AYOUNT Or ACTIVITY LOC ATION OF itE L E ASE i 6 d 9 d @ d@ 10 11 NA 44 l l 4'J NA HO PE HSONNE L f XPOSUHLS NUMBE f t TYPt D E SCFit P TION i na i

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