ML19270E924

LER 78-093/03L-0 on 781204:wiring Error Found on 10% Closure Position Switch for Inboard Main Steam Isolation Valve B(29-AOV-8OB).Caused by Crossed Wires

ML19270E924
Person / Time
Site:	FitzPatrick
Issue date:	12/27/1978
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19270E922	List: ML19270E921 ML19270E924
References
LER-78-093-03L, LER-78-93-3L, NUDOCS 7901030143
Download: ML19270E924 (2)

Text

N RC F OH M 366 v. s swuttean ntuuta e un v Lu'vnvunluiw 47 77)

LICENSEE EVENT REPORT (oNinot eLoc< l l Jl l I I (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) o y H 9 N lY JjAlFl1 gl0 LIC E N SE E (.UP 14 17 0

-l 0 0l0l0l-l0 LICE NSE Pet Ybt H 0

0g4

.' $ i*i 1 l 1 l 1 l 1lgl L it. L N N E IvFt Ju l

51 L A s Ses lg ccvr 0 1 [,$js l I@l 01 5 l 0l 0 l 0 l 3l 3 l 3 l@l 1 l 2 l 0 l 4 l 7 l 8 ]@l I l 2 Htl eOH 2 j r7o-1E] 7 l 8r; l@

i a w ei co. a T Nuvn H u on tutNr oATe i4 is EVENT DFSCnlPTION AND PROB ABLE CONSEQUENCES h Please See Attachment l l} .] l

!o .a l 0 l I

e o 1 l

o17 [ _

I o I eo i H 9 Sv0Tf Y CAUlf C AUSE C O' 'P VALVE C C ..L CCL 'Lbluut C O*.* * " N E N T C O D E. Suscnot Suuroot o ,

lI l ^l@ l A l@ L' J @ l ' I N l S T R lU l@ ]g ]g 1H 14 .I

/ H 4 10 11 12 13

f QU E N il A L OCCOAPFNLF H E rTH T R[V M N LODE TYPE f;C tga+3 i VI NT VF A H Ft[ POH T *.r)

~ '

/J 24 i ti 21 '

. 24  ?> JJ 31 JJ

_ il F U T t, H E E F F f f'T SHO T L > ATT ACHYE *4 T N PH D-4 PHIVE COMP. CLYPONE N T ACT.N .

T A a~ t 'J A C T ION ON P L A'.T * ' E T H '.,D

. HOUns 'J J gur<vi T i g [3 FOHM butt LUFPt l[H MANUFACTUHFH JJ 34 $5 u. 3 4.J 41 42 43 44 41 cAuse oEsenwriON ANo comucTivE Acrios @

i o Please See Attachment _l I

l li li i i i ,

I I

i ,

I l

I Ill ! Hf) i H )

F ACit Il v' g UE THOD OF N PO/,E H O T H E H S i,. T UC Ut sros i H y Discovt HY otscnwitGN 34 JTAIUs i s H lg l0 l 0 l0 lgl NA 44 l B [gl Surveill..nce Test 80 l

7 H 1 13 12 11 4a 46 AC TIVITY CONTENT 5)f L t ANE D PF PF LI ASF AYOt. NT OF ACTIVITY d' LOC A TION OT HE LE ASE 1 6 NA l l NA l 4 10 44 45 EJ

, ei 11 Fl HW.Nt. L f x POSUH E S N Y[H TYrf L L SCHiPTIUN 3'J 1

1 8 9 l0l0l0]h 2 @l 11  ?? 13

.'A NJ l

P( H'aONN( L IN F , H' E S P U h[ H DE SCH'PilC N i 0 NA l 7 H q 11 12 80 L OSS OF OH D AY AGE T O F ACILI TY -

TYPE h t '.c. Hip iloN l

i N 8 9 I:1@l io NA 730.tuourg so P= = , Nnc usc om v

• v,suso Dt SC H iP 110N 121o1LS 8110 N\ l lIIIIIIIIII!ll 7 8 9 fM fa 9 80 5 o

W. Verne Childs 315-342-3840 ",

N A'/E OF PRE PA D ER PHONE.

ATTACllM(NT TO LER-78-093/03L-0 Page 1 of 1 s

During the conduct of testing in preparation for staziup following the 1978 Refueling and Maintenance outage, a wiring error was found on the 10*o closure position switch for inboard MSIV B (29-A0V-80B) . The error was discovered during conduct of Operation Surveillance Test F-ST-II titled MSIV Limit Switch instrument Function Test which was being performed to meet the requirements of Technical Specification Appendix A, Tables 3.1-2 and 4.1-2.

Similar switches on the other seven (7) MSIV's were also tested and found satisfactory thus the safety function (scram) would have been available from the other seven (7) channels of instrumentation.

Each valve position switch is actually two (2) switches and investigation revealed that wiring to the two (2) switches had been inadvertently reversed when the switches were reassembled following work on the MSIV. Following correction of the wiring error, F-ST-II was completed with satisfactory results. The maintenance procedure will be revised to provide for tagging or narking switch leads prior to disconnecting.

.