ML20002B935

LER 80-043/03L-0:on 801021,motor Operated Valve SW-MO-89B Failed to Open.Caused by Broken Wire Connected to Ohmite 1000-ohm Variable Resistor Inside Valve Operator.Broken Lead Resoldered & Circuit Checked

ML20002B935
Person / Time
Site:	Cooper
Issue date:	11/20/1980
From:	Bednar L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20002B934	List: ML20002B933 ML20002B935
References
LER-80-043-03L, LER-80-43-3L, NUDOCS 8101070353
Download: ML20002B935 (1)

Text

NRC. ACRM 366 U. S. NUCLEAR REGULATORY COMMISSION

.47 771 LICENSEE EVENT REPORT (PLEASE PRINT oR TYPE ALL REQUIRED INFoRMATION)

CCNTROL BLOCK: l l l l l l lh lo l t3 l3 l N IUCENSEE 7

El ClCODE Pl Rl 1l@l 0l 0l- l 0 UCENSE 14 15 l 0 l 0NvYBER

] 0 l -l 0l 0l 0l@l4 25 2ti l1UCENSEl 1 l TYPE1l 1l@l 30 l

S i CA T 2d lg CON'T

• E "'

loIil 3g[, l60L @l0 l 5 l0DOCKET[ 0 lNUMBER 0 l 2 l 9 ltW8 @l1 l012 l1 l 8 l 0 @l 1l REPORT 1l 2lC O! 8l 0l@

7 8 61 69 EVENT D ATE 14 75 ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEOUENCES h lol:1 puring Surveillance Test, SP 6.3.20.1, motor operated valve SW-MO-89B failed to openp ioi3i [This valve is controlling flow when RHR service water pump 1B or ID is running. l 10 6 41 l(T.S. 3.5.B.2) This event had no ef fect upon public health and safety. Redundant l lo!si l systems were available. This event is not repetitive. 1 I) is i I i 13171 l l Iois 1 I I

, , , .0 SYSTEM CAUSE CAUSE COVP. V ALV E CODE COCE SLSCOCE COMPONENT CODE 3L8 CODE SU8 CODE lojal 7 8 9 lW l A lh W@ l A l@ l V l Al Ll Vl Ol Pl@ l Xl@ ]@

10 si 12 IJ TH I '> 20 SEQUEN TI AL OCCUR RE NCE REPORT REVISION

_ EVENT VEAR REPORT NO. CODE TYPE NO

@ =LEg R i RO 81 01 1-1 1014I31 24 26 Ld 27 I of 31 29 i Ll l_] [0_J

_ 21 22 23 29 30 31 J2 TAK N ACTO ON PL PT VET HOURS SB IT FOR 8 $UPPLIE VANUFA URER LtJ@LnJ@ L7J@ LzJ@ l01010101 L3]@ l I@ l zi@ Iz 191919 l@

JJ 34 33 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 17 l o i lone of the 3 wires connected to a OHMITE 1000 ohm variable resistor counted inside l IiIi1 Ithe valve operatcr was broken. The broken lead was resoldered and the circuit check 1 ii,,i led. The valve was retested and its operation verified. Valve SW-MO-89A which is in I l i 131 I the second loop was also checked. The exact cause of the broken lead is not known. I lilal lThic f ailure in considered nno of a kind and uniaue. I a 9 80 ST 5 *:. POWE R OTHER STATUS 015 OV RY DISCOVERY DESCRIPTION lil5IIEl @ l Ol 9l 7l@l NA l l Bl@l Surveillance Test l A TlVITY CONTENT aELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE NA l l NA l li 169 I ')LzJ @ 10Lzl@l 1 11 44 45 80 PERSONNEL EXPO $VAES NUYBER TYPE DESCRIPTION li l 71 'L010101@l zl@l NA l

, ERSONN A'~uh5 Num . o ESCR,P T,0~ @

NA Ld_] 1010101@l M 1 11 12 80 l

t J.J

• n OH D AMAGE TO F ACILiTV fvPE ()ESCHIPTION I t 191 Lzj@l NA I r A <r 10 80 t HsPitON

• sv U t 2 'I MA  !  !!!llllll!!!

i it 'J 10 68 69 80 3 Ladislav F. Bednar 402-825-3811 o NAME OF PAEPARER PHONE- $

8101070353