05000335/LER-1979-004-03, /03L-0 on 790205:discovered Two Misalignments in Control Element Assembly.Caused by Faulty Upper Electric Limit Reed Switches.Faulty Switches to Be Replaced During Next Refueling Outage

/03L-0 on 790205:discovered Two Misalignments in Control Element Assembly.Caused by Faulty Upper Electric Limit Reed Switches.Faulty Switches to Be Replaced During Next Refueling Outage

ML17266A043
Person / Time
Site:	Saint Lucie
Issue date:	03/05/1979
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17206A699	List: 05000335/LER-1979-004, Forwards LER 79-004/03L-0 05000335/LER-1979-004-03, /03L-0 on 790205:discovered Two Misalignments in Control Element Assembly.Caused by Faulty Upper Electric Limit Reed Switches.Faulty Switches to Be Replaced During Next Refueling Outage
References
LER-79-004-03L, LER-79-4-3L, NUDOCS 7903200377
Download: ML17266A043 (2)

LER-1979-004, /03L-0 on 790205:discovered Two Misalignments in Control Element Assembly.Caused by Faulty Upper Electric Limit Reed Switches.Faulty Switches to Be Replaced During Next Refueling Outage

Event date:
Report date:
3351979004R03 - NRC Website

text

NRC FORNNNI 388 (7 77)

LICENSEE EVCIVT REPORT U. S. NUCLEAR REGULATORY COhlMISSION I

I I

iOi [PLPASE PAINT OR TYPE ALLREOUIREO INFORhIATIONI O,i 0

2S 28 L'CENSE TYPc 90 Si GAE 33

~OI FI LIS I.I 2001-00I0100-0 I024111111IN~QE 3

9 LICENSEE COQE O.

ucKNSK N<<MBEA CON'T

,"QEUAG- ~L'QEOI5 0 0 0

3 3

5 7

0 7

3 EIO BI OOCIIET NUMBER BB I 49 EVEE4T OESCRIPTION ANO PROSABLE CONVSEOUENCES Qlo

~o2 I(hi h

i d

~50 510 19 Q~IIN li Q

VK94T QATK 74 7S AKPOATO*TE 30

~a~

inserted for test ur oses but then could not be manuall withdrawn.

This

~o led to a reater than 7.5 inch misali nment with other CEA s in its rou

~os ACTION was taken in accordance with T,S. 3.1.3.ld, and CEA 57 was aligned n

A

~O eri ced se en e f events.

Both misali nments were due

~o 8

to the same

cause

as described below.

7 8

9 30 SYSTEM

CAUSE

CAUSE COMP.

VAI.V8 COGE CQOE SUBCQOc CGMPONENTCQOE SVBCQOS SUBCQQE 0

QII

~EQIE

~AQIE C

I RID I R Ii E

Q"

~2QI gJ Q" 7

8 9

in li 12 13 1$

19 20 ScQUENTIAL QCCURREiVCE REPORT R KV IS I ON

~

LEAIAO KVENTYEAR AEPQR ~ NO.

CQOc TYPE

'Io.

QIE NENONE ~79

~

~001 4

~W

~03

~L

~

~0 21 22 22 24 2$

27 28 29 0

21 22 ACTION FUTURE EFPEC

~

SHVTGOYIN ATTACHMENT NPROW 'RII48COMP.

COMPONK.IT TAIIKN ACTION C4 PLANT hIETHCO HOUAS +22 SUBMITT O FOAMSUB.

SUPPLIER 'IANUFACTUAPR L~JQLJQ LJIQ LTJQ OOOOI 0 El LJNQ LKQ LJNQ I

4 9

0 25 28 27 41 42 42 44 47 CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS Q27 o

The CEA misali nments were caus d b fa lt i

d switches.

Both CEA's have redundant reed switches hat function as the fault swit thus enablin the redundant switch s to contro tw rd A

cho man The fault switches will be re laced durin the 7

8 9

FACILI Y

~3P METHOO QF STATUS R POYIER QTHER STATUS ~

OiSCOV SAY 5

E GE ~l0 0

QEE NA

~AQI 0

7 8

9 10 I'2 4S 48 ACTIVITY CQ'ITENT AELEASFO OF AELKASE AVOVN7OF ACTIVITYQ3S EKi MO33 MO 10 ll 44 45 PEASOIINEL EXPOSURES TYPP EDQ Lala~OOE'ilOS 7

3 9

II I'2 P PEASQNN 8 L INIURIES 2

L00F0 00IQE NA LCSS OP A OAMIAQE 0 FACILITYQ43 TYPc GESCAIPTIQN CiiH LZJO2I NA 7

8 IO PUBI.IC:.Y

SSUKO OESC<<PT:CN OOS UZLN'Oc'A 7

3 9

10 LOCATIONOF RELEASE Q38 BO 30 30 90 NRC USc O54LY SB 20 305 552-3802 next refuelina outa e.

DISCOVERY OESCAIPTION Q42 erator Observation 7903 200 8 lg