ML20062G242

From kanterella
Jump to navigation Jump to search
/01T-0 on 781214:High Pressure Instrument Channel Relay Failed to Energize Due to Disengaged Agastat CR0095 Relay Socket Contact That Failed to Make Contact W/Agastat FPB750 Relay Contact.Contacts Were Reengaged
ML20062G242
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 12/21/1978
From: Hammer M
NORTHERN STATES POWER CO.
To:
Shared Package
ML112760146 List:
References
LER-78-029-01T, LER-78-29-1T, NUDOCS 7812270237
Download: ML20062G242 (1)


Text

- - - - - - - - - - - - - - - - - - - - - - -

Il -19l

  • fildl.NSUlfl.VN I IH l'Olil nen n nn nien:x l, l l l l l J..(i) we i A .i rnini on ivet Att in uinni n ini onmnosi lo lTlH i MI NL1_il Nl Pl Il@l 0 l 0 l -l 0 l 0 l 0 l 0 l 0 l - l 010 j@l 4l ll 11 Il ll@l l l@

i 'l LaLL N54L 00,){ 44 ,S t it:L N'.k NUM'II II /% /fe 6 4CL N:.k 1 Y,1, JG 'J 7 GA f tad

(:()4* f loJT] ' ";',',' " L.Lj@l 01 Sl Ol 0101 21 61 3l@l 11 ?! 11 al 71 R @l l l 2 l 2 l 1 l 7 l 8 l@

EVENT DESCF PTiON A 0PROBA LE C N E NCES I o I 2 I I DlRING NORMAL OPERATION. hilILE PERFORMING ATh'S-RPr SURVEILIANCE TEST. A REACTOR I

[ o l a I ; 11IG1 PRESSURE INSTRlNEhT OIANNEL IELAY FAIIED TO ENERGIZE. REDUND,WT IIIGI PRESSURE l o 4 i OIANNELS WERE OPERABLE. NO EFFECT ON PUBLIC ILEALTIf OR SAFETY. TIlIS CONSTITLITED I o s 1 COMPONENT PERF010t\NE RIjQUIRING CORRECTIVE ACTION TO PIEVE?TT OPERATION IISS l l o is 1 I CONSERVATIVE TIIAN ASSIMED IN DIE TEOi SFECS (T.S. 6.7.B.1.il AND IS CONSIDERED A I l o l 7 l 1 POTENTIAL GENERIC PROBLEM DUE TO SIMIIAR FAILURES IN NON-SAFETY RELATED CIRCUITS. l

."] '

I I

'MW' 'c^!# soc"#E couco~ENrcoot sUoc"loE s"n!'oE o_ 9 8 9 l I lE l@ l.lj@ l,Aj @ l R l F l t I A l Y I X l@ W@ l_Z._j @

10 11 12 7 IJ 16 19 20

.,, SE QU E N TI A L OCCUHnENCE REVISION ggn EvENivEAH H(PORT NO. cOOE RE,O,nT TV E NO.

@ ,ag,no'

_ 21 17181 22 1-1 23 1012191 24 Jti W

27 10l1l 2M 29 l30Tl l-l 31

[0]

J2 TAKER A Tio ONPL T ] HQUn$ SUt MIT D F Of UH $UP,L T MANUF Af TURER LaJ@LaJ@

1.1 31 LZJ@

J5 LIJ@

its l0101010I l# 40 lM@

43 LY.J@

42 L.xJ@

43 lAl1l0l9l@

44 47 CAUSE DESCRIPTION AND CORnECTIVE ACTIONS h l i i o I l ONE AGASTAT #CR0095 RELAY SOCKET CO?iTACT WAS DISENGAGED FROM Tile SOOTT AND NOT l l ' I i I I MAKING CONTACT WITTI T1IE MATING ArASTAT #GPBC750 RELAY CONTAcr. CONTACT RF-FNrJmFD 1, i RELAYS PLAED wl IN SCCKET. ALI. SIMIIAR REIAYS WERE TESTED AND FOUND OPERABII. I l

b l ON ACCELERATED SURVEILLANCE SGIEDU1E INSPECTION TO BE PERFORMED DURING PIANT l i 4 i OlTTAGE. I r e , e0

'5 T 5  % ,0WE R OTHt n STATUS Dis i DISCOVERY DESCRIPTION i s SURVEILLANCE TEST

[E J @ l 11 01 0l"@ l "NA l lB l@l*" l

' J,,,,,, co';, on "

,,n , y. , , , n, ..u r A.,

A ,oon, o, Ac non v @l NA l W. ANON or HRCASE @

' o NA

' Lz_1@ LZ.J@l "

  • l

' ,rnso~~'Ei ,,,o ".s **

~, .v ir n 1ver on.un,no~@

li' lil '101010 '

l@l 'Z l@l" NA l

,, nso~~El',~,U,? Es *

~oM ,n nEsau.nO~@

W l 8019 01 Ol @ l 7 11 12 NA l 60

'r$'E "8c7 ^,','o'N '""@

7 9

1, W@l NA 9 to l

,, 80 cont ic, , v f unc use onty

, , 'ggpsc"""~ y, g 7812270.235- i i i i i iii i i i i i ij r a 3 10 68 69 80 ;

NAME OF PDEPAntle *

  • PHONE. 612-295-5151 2,

~

_ _ . - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ce