05000348/LER-1982-056-03, /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

/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: 05000348/LER-1982-056, Forwards LER 82-056/03L-0 05000348/LER-1982-056-03, /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
References
LER-82-056-03L, LER-82-56-3L, NUDOCS 8211040174
Download: ML20027D345 (1)

LER-1982-056, /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

Event date:
Report date:
3481982056R03 - NRC Website

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LICENSEE EVENT REPORT CONTROL BLOOK: l l

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6 Gw G1 DOCKET NU'/t EH G8 h3 EVENT OATE 74 h. REPORT OATt 60 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.

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k 23 34 36 37 40 41 42 43 44 47 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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