ML20041B801

LER 82-009/03L-0:on 820122,during Normal Operation,Mounting Bracket for Turbine Stop Valve D,Train a Proximity Switch Discovered Broken.Caused by Excessive Vibration.Bracket Repaired & Switch Remounted

ML20041B801
Person / Time
Site:	Cook
Issue date:	02/18/1982
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20041B788	List: ML20041B787 ML20041B794 ML20041B801 ML20041B808
References
LER-82-009-03L, LER-82-9-3L, NUDOCS 8202250215
Download: ML20041B801 (1)

Text

. - .

LICENSEE EVENT REPORT CONTROL eLOCK: l l l l l (PLEASE PRtRT OR TVPE ALL REQUIREO INFORMATIOW l

Io Iild i9M I ILICENSEE I

I D l CDDC C I C I 2 l@l 010 l 0 lLICENSE 14 'S 010101010101010 NUVdEH 45 l@l411ita 11 11 LIGEN3E i

TYPEIl40l@lSi LAi 64 I@

CON'T loIil s7,n"c' l L l@l 0 l 5 l 0 l 010131116 l@l ti3 011 l 212 l 812 l@l 012l I4 75 Il 818l 2dol@

REPORT DATE

1. 8 t,0 bl DOCKE T NUh?BEH bd EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o ! .- l lDURING NORMAL OPERATION, IT WAS DISCOVERED THAT THE MOUNTING BRACKET FOR TUREINE STOP [

[ o 13 l l VALVE D, TRAIN A PROXIMITY SWITCH HAD BROKEN. THE PROXIMITY SWITCH PROVIDES THE TUR- l THE REDUNTANT l Inl4llBINE STOP VALVE CLOSURE INDICATION FOR THE REACTOR PROTECTION SYSTEM.

lo isi ! STOP VALVE SWITCH WAS OPERABLE AT THIS TIME. THIS EVEftT IS NON-CONSERVATIVE WITH l loIsil RESPECT TO TECHNICAL SPECIFICATION 3.3.1.1, TABLE 3.3-1 ITEM 18.b. PREVIOUS OCCUR- l I o { il l RENCES OF A SIMILAR NATURE INCLUDE: 50-316/81-022,80-069, 050. I I

l o !s ! I C DE CODE SLBCO E COYPONENT CODE SUSC DE S DE 10131 I e l II Al@ l El@ l B l@ lI IN IS IT lR IU l@ l Il@ l Zl@

9 to 11 12 TJ 18 19 20 lVENTYEAR REPOR P40 CODE Y N

@ ,=tg g 9 01812I l-l I0l0l9l l/l [0l3l lL l l-l 101 32 21 22 23 24 ati 27 28 2'J 30 33 TA EN AC O O PLA T ET HOURS S 8 IT FOR dub- SUPPLIE MA FACTLPER lB l@lF l@ l Z l@ lZ l@ l 010l 0l 0l 31 l Nl@

41 lYl@ lAl@ l44N l 0 I 0 l 747 l@

JJ 34 35 J6 4J 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li)olIINVESTIGATION REVEALED THAT THE MOUNTING BRACKET HAD BROKEN DUE TO EXCESSIVE VIBRATION.]

lili1 lTHE MOUNTING BRACKET WAS REPAIRED, THE PROXIMITY SWITCH WAS REMOUNTED AND TESTED I gii-il SATISFACTORILY. NEW BRACKETS HAVE BEEN DESIGNED AND WILL BE INSTALLED DURING THE I Iiiil l NEXT 00' AGE OF SUFFICIENT DURATION. UNTIL THEN THE BRACKETS WILL BE INSPECTED WEEKLY l l

I tiiai l DURING VALVE TEST. 80 1 8 9 STA S ** POV.E R OTHE R STATUS SCO RY DISCOVERY OESCRIPTION Iil5llEl@ lll0!Ol@l NA l lAl@lTECHNICIANOBSERVATION

'S 8 l

' JTiviT v co'4 TE NT RELE ASED OF RELE ASE AYOUNT OF ACTIVIT Y LOCATION OF RELE ASE NA l [ NA I It 16d l9l Z l @ l Zl@l 1 to 11 44 45 80 PERSONNEL F xPOSURES NLVBER TYPE DE SCRIPTION IiIil1010loj@l7l@l NA 8o i

PERSONNe't iN;u' RIES NUveE R nESCn,PriO~@ .

l li l- le l9 o l 010 l@lu NA ii ^

lt 191lZl@l

'#PE

" fs'C78Mo' ' ' " @

,0 NA {-T ,

DE SCRIP TION e, ISSU E l l e I o l [fj{J@l NA -l l1!!!l!!!!!'12 8202250215 820218 616 465-5901 "la PDR ADOCK 05000316 R. A. PALMER pnoye.

+

S PDR