05000255/LER-1980-020-01, /01T-0:on 800711,control Rod Drive Mechanism Failed to Operate Properly,Resulting in Rod Being Misaligned for Approx Five Minutes.Caused by Dirty Control Relay Armatures & Contractor Interlock Which Resulted in Sticking

/01T-0:on 800711,control Rod Drive Mechanism Failed to Operate Properly,Resulting in Rod Being Misaligned for Approx Five Minutes.Caused by Dirty Control Relay Armatures & Contractor Interlock Which Resulted in Sticking

ML18045A421
Person / Time
Site:	Palisades
Issue date:	07/29/1980
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18045A420	List: 05000255/LER-1980-020, Forwards LER 80-020/01T-0 05000255/LER-1980-020-01, /01T-0:on 800711,control Rod Drive Mechanism Failed to Operate Properly,Resulting in Rod Being Misaligned for Approx Five Minutes.Caused by Dirty Control Relay Armatures & Contractor Interlock Which Resulted in Sticking
References
LER-80-020-01T, LER-80-20-1T, NUDOCS 8008050080
Download: ML18045A421 (1)

LER-1980-020, /01T-0:on 800711,control Rod Drive Mechanism Failed to Operate Properly,Resulting in Rod Being Misaligned for Approx Five Minutes.Caused by Dirty Control Relay Armatures & Contractor Interlock Which Resulted in Sticking

Event date:
Report date:
2551980020R01 - NRC Website

text

"4 PALISADES PLANT NRC FORM366 17-771 U.S. NUCLEAR REGULATORV COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: I 10 IP'LEASE PRINT OR TYPE ALL REQUIRED INFORMAT10NI 1

11 [ill I Ml I I P!A IL I 110J o I Ol-1 o IO Io I OI o I - lo Io 10f 4 I 111 I 111 101. I I@

7 I

II LICENSEE COOE 1.&

U LICENSE NUMBER

Z~

21 LICENSE TYPE lO 57 CAT 511 CON"T [ffiJ 7

I!

~ ~lo I 5 I O I 01 O I 2 f 5 I 5 (?)Io I 7 Jl 11 18 Io @I o 17 12 I 218 Io I@

IC 61 DOCKET NUMIEll 68 69

!:VENT DATE 7'

7~

REP'ORT DATE ID EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES {iO)

[))IJ I Following control rod ma.nipula't1.ons during normal pover. operation, III!J CRDM No 39 drove in *apPro.x 39 inches.

As a result I the rad vas

!]JI]

misaligned :from the remaining rods in its group for about 5 minutes *

!l!Imedia:te action consisted o:f halting rod invard I110tion, manual exercising [TI]) I

~

[))]JI 1.. _o_-r_t_h_e_CRD M_"_d_o_wn_

1

_'_c_on_t_r_a_c_t_o_r_s.....;,:......an~d~p!:,;.1='=1 =J =i=n""gi....::r~o:.:d:........:t::.::o:........:i:..t;:.;s=-r=-=e.:::.a-=ui=*=r..::e:.::d::..-i:P-O~s""'1::.* t.... 1...

• _o_n __._

((lI)

Reportable per TS S-5.1 and 3.10. 4c.

Similar event occurred on July 24,

[)))) 1 1980, b'at did not result in misaligned rod.

7 I

11 [ill]

1 a

SYSTEM CDQi IR ljj !@

SI 10

CAUSE

CAUSE CCM".

VALVE CODE SUllCODE CDMl'ONENT CODE SUICODE SUBCODE 1.!J@ 1.!J@ le IR !D IR Iv IE !@ lz.J@) ~@

11 1:2 13 18 111

zc SEQUENTIAL OCCURRENCE RE"Ofn'

.t:::\\.LEAIAO CV£NTYEAR llEPORTNO.

CODE TYPE 0

REPORT 181 Of I I lo 121 ol 1....-1 fol 1!

!LJ I. I NUMBER 21 22 23 24

Z&

27 28 29 30 31 ACTION. FUT\\JAE EFFECT SHUTl)OWN I.::\\

ATTACHMENT

""'"°"

l'!'llME COMP.

REVISION NC.

IQJ 32 C0M"DNENT MANUFACTVl'IEA I

IC TAl(EN ACTION ON PLANT METHOD HOURS ~ SUllMITTEI:)

FOIHll;UB.

SUl'l'LIER LI@l.!J@) L!J@

~ Io IOI go I IJLJ@)

Llil@

m:..J@

le 14 I 9 lo I@

C7 33 34

~

J6 l7

,.g o&1 C2 4l CAUSE DESCRIPTION ANO CORREC"rlVE ACTIONS @

OJ:[] I CRDM control relay armatures and UP/do'W?l contractor interlock were dirty.

causing them to stick.

Contactors and interlock for CRDM 39 have been cleaned and lubricated.

Cleaning and lubrication of remaining contactors IIIIJ 1 is in progress.

A PM to perform this function on a re:fueling G:ycle is [Ir!J I being developed.

7 I

11 FACILITY l3(j\\

STATUS

'l'OWER OTMER STATUS \\CJ OJI] ~@ 10 I 3 I O !@I N A

. I 7

8 9

10 12 13 ACTIVITY QNTENT

~

RELEASED 01' RELEASE AMOUNT DI' ACTIVITY ~

[ill] W@ ~'

NA I

7 I

II 10 11 44 IO METMOOOI'

~

OISCOVEllY DISCOVERY OESC"ll'TION '5 l.!J{§)1..l.....::Op~e~r~a~t~o~r::..._Ob~s~e~rv:....:..~at~i~o~n,__....... ______ ~

~

~

ID LOCATION OF l'IELEASE @

NA llC PERSONNEL Elll'OSUAES JC\\

O NUMtlEP.

~TYPE~

DESCRll"TION ~

lITI] I.1 a I Of~~l1..-.._,;.;N;,,..;A::.. -----------------------=

7 II 9

11 12 13 IC l'ERSONNEL IN.JURIES

~

NUMllER DESCRIPTION~

[JJ!] I d olo l@)L------.Ll....4 ________.;.._ _____________

~

7 I

SI 11 12 IC LOSS 0C 0A DAMAGE TO FACILITY~

~E DESCRll'TION l::::;J IJTIJ l!J@

N A

1.

8 SI 10 l'UllLICITY C\\

lss,l,IED~ OESCRll'TION ~

[ill] 1!.Jei.... I ______

N_A-----------------~ I I I I I *1 I I I I I I I

• 7 8

II 10 61 511 IC NRC USE ONLY 8 ooso5*0~