ML20002B043

LER 80-036/03L:on 801105,battery Charger 12 Failed to Provide Normal Output.Caused by Firing Card B Not Providing Pulses to Fire B Phase Scr.Card Replaced

ML20002B043
Person / Time
Site:	Prairie Island
Issue date:	12/03/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20002B036	List: ML20002B035 ML20002B043
References
LER-80-036-03L, LER-80-36-3L, NUDOCS 8012090381
Download: ML20002B043 (1)

Text

_ _

NRC FCCM 386 U.L. NUCLEAR REGULATCRY COMMISSION (7 77)

LICENSEE EVENT REPORT O

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

CONTROL BLOCK: l l l l l l 6

lh l0 liI8 lM 7 9 l Nl Pl 1l N l 1 l@l LICENSEE CODE 14 15 0 l 0 l -l 0lLICENSE 0l 0l0 l 0 l- l 0 l 025l@264 l 1l NUMBER 1l 1l LICENSE TYPE1JOl@l57 l CATb8 l@

CON'T IOlil 7 8 XO 11

." 60 1@l61 0151010101218] DOCKiT NUMBER

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, . 69 111101 s l a l O l@l EVENT DATE 14 iS il REPORT 2101318101@

DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES 10 go;7y l During surveillance test, No. 12 Ba tery Charger failed to provide its normal l

,g,,, p output. The charger would have charged the battery, but probably not at the l ioi,,l rate specified in the FSAR. Not repetitive; last failure of a charger was l

og.,,; RO 76-20. No effect on public health and safety since redundant equipment l l 0 l6 l l was operable. Tech Spec 3.7.A.6 applies. l 101711 I 10181I 80 I

7 8 9 DE CODE SUSC E COMPONENT CODE SUSC DE S ODE O 9 i e I c l@ LEJ@ LeJ@ l a l Al TIT IR IV l@ W@ L2.J @

SEQUE N TI AL OCCURRENCE EPORT 4EVISION EVENTYEAR REPORT NO. CODE TYPE NO.

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_ 28 22 l-l 23 I o 13161 24 26 Ld 21 lo 13 I 28 M LtJ 30 L-l 31 lq_J 32 5 TA EP A ON O PL NT 9 Y D HOURS S8 IT D FOR b 8. SUPPLI MANUFA T RER LLJPL7J@ LtJ@ L:JO I o l ol ol of 31 L.d@ LLl@ LaJ@ It 131s i s47l@

33 J4 35 36 40 41 42 43 44 CAUSE L ESCRIPTION AND CORRECTIVE ACTIONS h l3 ;Dl l Fir: tag card B was not providing pulses to fire the "B" phase SCR. Spare l 3 i l battery charger was connected upon discovery. Faulty firing card was I i 2 l replaced and io . 12 Battery Charger returned to service. l lilli l I til4i l I 7 8 9 80 ST s -  % POWE R OTHER STATUS Dis OV RY DISCOVERY DESCRIPTION Li,,JSJ [ Jj @ l 1l of ol @ l NA I L2J@l surve111ance Test I ACTIVITY CO TENT-RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 1

i 6 8 9 C g ggl to 11 NA 44 l l NA 45 80 l

PE R SONN E L E X POSUR ES bVVRER TYPE DESCRIPTION ltI;Il010l0l@[Zj@l _

NA l PERSONNE L INJURtES NUMBER DESCRiPTtON i x l0l0l0l@l NA _j 7 8 9 11 12 80 LOSS OF OR DA)aAGE TO F ACILITY TYPE DESCRIP f f 0N i 2 l7z_j@l NA l 7 t: 1 10 80 l

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l , io So a A. A. Hunstad PHONE:

NAVE OF PREPARER $

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