ML20027D345

LER 82-056/03L-0:on 820927,control Rod Bank D Declared Inoperable When Rods Would Not Move in Manual Control.Caused by Bank Select Relay Sticking,Causing Control Banks B & D to Be Selected Simultaneously.Relay Inspected & Reinstalled

ML20027D345
Person / Time
Site:	Farley
Issue date:	10/26/1982
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20027D344	List: ML20027D343 ML20027D345
References
LER-82-056-03L, LER-82-56-3L, NUDOCS 8211040174
Download: ML20027D345 (1)

Text

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LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL RECutRED INFORMATIO.*?)

CONTROL BLOOK: l 1

l l l l l lh 6

l l

10 l 3i 0l I ^ lL lJ l M l F l 1 gl150 l0 l- lLICEt:SE LICE .3EE CUDE 14 0 l0 NUMSCH l0 l0 l0 l- l0 l020 l@[ 26 4l e1l 1l 1l 1l@lbi LA: $3[g M.\5E 1YPE JO l

T of1 3[,c l L l@l 015 l 010 l 0 l 3 l 4 l 8 l@l 019 l 2 17 18 12 l@l1l0l2l6IRl?lh 60 i 6 Gw G1 DOCKET NU'/t EH G8 h3 EVENT OATE 74 h . REPORT OATt EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h l 012 l l At 1230 on 9/27/82, Control Rod Bank D was declared inoperable when the rods would i 10 t s i l n t move in manual control. Tech. Spec. 3.1.3.1 requires all full length ro'ds to l go;,,3l be operable and positioned within +- 12 steps of their group step counter demand l go,gi ; position. Tech. Spec. 3.1.3.1 action statemen*. requirements were implemented until l g o ,3 ; g 1348 at which time a reactor trip occurred and mode 3 was entered rendering the action l

o g y; l statement requirements inapplicable. Health / Safety of the public was not affected. j iOtaIl I 33 7 &9 E OE SUSCO E COMPONENT CODE SUE dE SU E l 0.l 91 7 &

l R l B l@ . Wh W h l C lO lN l R l 0 l D lhIS lZ lh lZ l h 9 to 11 12 13 18 23

_ SECUENTIAL OCCUR R E NCE REPORT REVISION (go RO EVENT YEAR REPORT NO. CODE TYPE N O.

@ fgg _ 21 I 8l 21 22 l-l 23 1015161 24 26 l-l 27 l0 l3 l 28 23 It M

I l-l 31 10 l 32 A ATO O!PLA T METH HOURS SS i FOR1 5 S P LIE MA FA h c!E (N

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41 lNl@ lNl@ lWl1l2I 0l@ 47 23 34 36 40 42 43 44 CAL'SE DESCRIPTION AND CORRECTIVE ACTIONS h l i i O l l This event was caused by the bank select relay sticking which caused control banks l lilil lB and D to be selected simultaneously. The relay was inspected and reinstalled and i 3,,.,; j the problem did not recur. Control rod bank D was declared operable at 2235 on I r-l q l 9/27/82. ]

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7 8 9 30 STA 5  % POWER QTHER STATUS 015 O RY OISCOVERY OESCRIPTION lt l 5' )' l Elh l1 l 0 l0 lhl" NA 'l lA l@l Operational Event l ACTiviTv CO# TENT stELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE I l NA I li Ic 4i I9 zl @ 17 T 10 l@lt1 NA 44 45 SJ PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION li l 71 1010 l 01@l Z l@l NA PERSO*JNE L NWRICS NU???fR DESCRIPfiON NA  !

li t a al 9I 0101 O l@l12 7 11 SJ LOSS ob GR 04..'3 AGE To FACILITY T (PE DE SLH9 t ION 7 -

• I 7lhI io 8211040174 821026 i'OR ADOCK 05000348 l

av Pt t;L t'.lTY 4 $ PDR NRC USC ONLY

• tSTUED OCRCRIPTION ,

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1. it 10 G8 63 33 ;

NAME OF PHFPAllET W. G. Hairston. TIT PHONE. (20'O 899-5156 E,