05000327/LER-1980-192-03, /03L-0:on 801201,F14 Control Bank B Rod Position Indicator Deviated by Greater than 12 Steps from Control Bank B Demand Counter.Caused by Shift in Calibr of Control Board Indicator.Indicator Recalibr & Returned to Svc

/03L-0:on 801201,F14 Control Bank B Rod Position Indicator Deviated by Greater than 12 Steps from Control Bank B Demand Counter.Caused by Shift in Calibr of Control Board Indicator.Indicator Recalibr & Returned to Svc

ML19340E131
Person / Time
Site:	Sequoyah
Issue date:	12/30/1980
From:	Cottle W, Wilkey A TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340E125	List: 05000327/LER-1980-192, Forwards LER 80-192/03L-0 05000327/LER-1980-192-03, /03L-0:on 801201,F14 Control Bank B Rod Position Indicator Deviated by Greater than 12 Steps from Control Bank B Demand Counter.Caused by Shift in Calibr of Control Board Indicator.Indicator Recalibr & Returned to Svc
References
LER-80-192-03L, LER-80-192-3L, NUDOCS 8101060477
Download: ML19340E131 (1)

LER-1980-192, /03L-0:on 801201,F14 Control Bank B Rod Position Indicator Deviated by Greater than 12 Steps from Control Bank B Demand Counter.Caused by Shift in Calibr of Control Board Indicator.Indicator Recalibr & Returned to Svc

Event date:
Report date:
3271980192R03 - NRC Website

text

. _ _ - - _ - - - -

. - _ - _ - _ ~

_ = _

c, O c'e LICENSEE EVENT REPORT 4

CONTROL atcCx: l l

l l

l l

l@

(PtE ASE PAINT OR TYPE ALL REQUi AE0 INFORMAf tom I

6 lM (T l N l S l N lP l 1 l@l 0 I O ! -l 0 ! 0 l 0 l 0 ! 0 l-l 0 l 0 l@l4 l1 11 !1 l1 l@(

l l@

7 8 9 LICENstt CQog to in LIC6 45L NWetM 4$

26 LictNSE Tvre ao 67 ut se-ccvr 10ltl

,$."g' lL hl0 l510 l 0l 0131217 @l 112 !O l1 l 8l Ohl il 213l O ! 810 I@

l 8

64 6'

DO;ntiNov0tu 68 69 EVtNT oATE 34 39 MIPGafCATE 80 EvtNT DESCRIPTION AND PROS A8LE CONSECUENCES h 10121 l With unit at 75% RTP, operator observed that red position indicator for F14 control I

g l bank B indicated 215 steps while the control bank B demand counter indicated 228 I

i

[ o t A l l steps, Since the computer indicated 231 steps and all other control bank 3 indications 1

)

[ol3) I were within 12 steps of the step counter, the position indicator for rod F14 was l

l lo is l [ declared inop.irable and the plant entered action statement a.1 of LCO 3.1.3.2.

There l

g lwas no effect on public health or safety. Previous occurrences - none.

I Iolai !

I System CAus CAUSf Coup vatyg CoCE CCCf '

SUSCo1E CCH*CNE NT COOr susCCCt 540CCDE joisj lI lD l@ l El@ l E l@ l IlN lS lT l Rl Ul@ [I l@ J @

io i,

u u

4 i.

a StoOE N TI AL CCCUn a( NC[

pgroot R E vtToN g gf qg (VENT VE AR PEPOnf NO.

4CCG fvPE No

@ a(gar l8l0[

[_ ]

l1[9l2l y

l0[3l lL l

[_.J y

_a, n

u 2

2.

a n

n si n

T K f A ?o CNPLANT M i U

HOU.'$

$ e T f on e.-

1 PP it uAN 8ACTUR(A lE lgl04Z lg l23z l g lJSZ lg l#0 l0 l 0l 0l [NJg lN]g lNlg lIl1l3l0l JJ J

40 41 42 42 44 4F i

CAUSE DESCRIPTION Areo CC ARECTIVE ACTIONS h ITTT1 IThe rod position indication channel was out of tolerance due to a shift in the i

y l calibration of the control board indicator. The indicator was recalibrated ed I

l g,j71 l returned to service within six hours.

t i l,I l Mo m

o n o,mr n r N

L, ii,.1 i 6 s so ototn sratus h bisCNtN h

's"r'AN."

% Porvta o'sCovtnv titsCaipitoN I i i s I (,,B_j@ l 01 7 l 5 l@l NA l

W @l Operator Observation i

80

' Jriv.,v Co'arcor Auovnt or Activity h l toCAftoNornettAsth i

arttAst

'ottt m NA l

NA l

iiloIL.zJ (zJ@l l

1 ia ii u

es se l

PenscNNeteneCsuats Nuvn e a tyrt ot sca,etioN j

NA I

l i i l l 010 l 0 i@Lz_J@l l

,, escNN 'L,,uu'J,is l

etsCn..rioN@

l

~uv. <,

l l' I? l l 010 I O l@l NA 80 7

8 9 si i;

Loss or on cauaGE To FACILITY Tv9t C E SCRIP TION I

Ii i9 i L. zJ@!

NA so io 8101060

~ Ac USc nm.

o.ucity 11 ot SCn'* f roN Q l$UtoNjhl NA [7

l l!II1l!IIIIll r

e n io se e,

- - W. T. Cottle/A. M. Wilkey 615-842-8261

~.

. ~., ~. _ _. _.. -