ML17266A068

LER 79-009/03L-0 on 790305:control Element Assembly 2 Would Not Withdraw Fully from Misalignment to Check Control Element Assembly Position Alarms.Caused by Faulty Upper Electric Limit Reed Switch.Switch Will Be Replaced

ML17266A068
Person / Time
Site:	Saint Lucie
Issue date:	04/04/1979
From:	James D FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17206A788	List: ML17206A787 ML17266A068
References
LER-79-009-03L-01, LER-79-9-3L-1, NUDOCS 7905150249
Download: ML17266A068 (2)

Text

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V(>i lc >Krformir! the CFA periodic Exercise Surveil'lance Tesl., CEA 2 inserted to a 7.5 inches misalignment to check CEA position deviation a]arms. It would not withdraw due to the presence of a "fully out" posi-ion iE.dic tion. It was inserted 2.5 or rore inches in attemptinE to clear the signal resulting in a 10 inches deviation. ACTIO:I per T.S.

3. 1. 3. ld was taken and the CF<<A restored to operable in 53 min<<tcs . This i the second occurrence of this type (see LER 335-77-17).

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)(sic C I 4' OAAcc elvc C IOSIS Ir ThK C(:A misalignment was caused bv a faulty upper electric limit reed switch. The CEA has a redundant reed switch that perfor)rs the sa-...e function as the faulty switch. The faulty switch was de-energized; thus enabling the redundant switch to control outward CFK movement. The fau'ty swvtch will be replaced during the 1979 refueling outage.

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