ML19350F148

LER 81-034/03L-0:on 810602,during Testing,Control Rod Driveline J-3 Overtravel Alarm Came Up & Rod Position Indication Was Lost.Probably Caused by Detached Inner filter.J-3 Recoupled

ML19350F148
Person / Time
Site:	Dresden
Issue date:	06/10/1981
From:	Holland P COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19350F147	List: ML19350F146 ML19350F148
References
LER-81-034-03L, LER-81-34-3L, NUDOCS 8106240267
Download: ML19350F148 (1)

Text

.

MftC postae 308 - - < ~~ U.S NUCLEAR REGULATORY COMMIS$3ON .

> um '

r LICENSEE EVENT REPORT CoNTRot stoCm i I l' l I l I@ (Pt.sAsa PmNT OR TYM ALL REQUIRED INFORMATIONI M

r l Ia leL l D l R l S I 2 l@l 0 l0 l- l0 l0 uCanset Coot i4 is l0 l0 10 l- l 0 l 02s l@l uCEust NvMua 2e 4 l1 l1 l1 i1 l@lsi car uCEust Tvrt a l l ss @ . _ . .

CowT -

'I o I

• I Ev% l40 L @lSi0 l 5 l0 l0 l0 l2 l3 l7 deQl 069 l 6 EVENT l 0 lQATE 2 l 8 l 1 @l0 l6REPORT l1 10 18 l140l@

'7 4 coCKET NUMeER 74 75 CATE EVENT QESCRIPTION AND PR08A8LE CCNSECUENCES h

~

R"TTI i During nor nal operations, with DTS 300-2 in progress, J-3 CRD was tested for overtravel.l r.usi l The overtravel alarm came up and rod position indication was lost. This was of minimal l g l safety significance since the rod was i= mediately recoupled. There was no effect on l ll o t s i l public health or safety. Previous events of this type during cycle 7 on Dresden 2; l ge,,,l R.O.: 2-80-9/03L, 2-80-28/03L, 2-80-37/03L, 2-80-62/03L, and 2-80-64/03L, Docket l

'roayl l 050-237. I ji o te l i I T . . *O Ce cE SL C E CCMPCNENT CCCE SLS C'E SL E

Io i s t' 7 8 I RlBl @ g g l3 l@ [ C l R l D lR lV lE l@ l Zlg l Z [g 9 to 11 12 93 18 19 20 SEcUENTIAL OCCURRENCE REPCRT MEVISloN t EVENT YEAR REPcRT No. CoCE TYPE No.

@ ,ag,E m/mo 18 11 I

,,_21 22 l-l 23 I013141 24 1/l I 01 31 ILI l-l 101 24 27 28 29 20 31 32 N C C C P T ME Moum$ c2 5ei PCA S. S t.i MANLFA REM

[32X [gl34C [g l6Z 3

[g l6 Zl@

3 l0l0l0l 31 40 l lN lg 41

[Y lg lN [g [ Gl 0l 8 l 0 lg 42 43 44 47 -

CAUSE DESCRIPT1CN AND CCRRECTIVE ACTICNS h ,,

, t i l o l [ Probable cause of this event is the CRD inner filter becoming detached. CRD J-3 was l

!i i ;i 1 l tecoupled, retested and will be overhauled at the next refueling outage. Continued 1 g performance of the inner filter pull test during overhaul should prevent recurrence. g I

. Ll.LI.I l ii si l 1 7 a s a0 5  % PCWER oTHEM STATUS I Y olSCOVERY CESCRIPTION It l5 l (,,,,,Ej @ l 0 l 4 l 7 l @ l N/A l l A l@l Operator Observation j r e ,j,,y,, gr,,, i n = * = .o Loc 2TicN c,,Emst @

Lt.Jsj.Emst@oi ZI N/AAMeuNT C, ACTiv,rv I@ I N/A

' -. EuAstl Z l@l I l' ' '

,EMsoN~E Excesses " *

• i NLMu. rv,E

=E2C-c~@

l 1171 l 0 l 0 l0 @l Z l@l N/A l r4 * ,...C~Nauz t, '=NUVgte CE3CRIPTICN

=

g l 0 l 0 l 0 l@l . /A l iV 4 9 11 - 12 30 l LCSS CF CA OAMACE To 54ctuTV G ms CEsCainTroN N'::/

N/A F

I r 191 A 3 l Z I@l10 l_

go ,

, NRC USE CNLY LusJLx_l613g3g,,,.7,g h */^ l !Iiiii!ii!ii11 V E 3 10 68 69 30. -

81.062iMc M .. P. Holland , m ,, 142-2920 Ext. 462 f I

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