ML19254E301

LER 79-084/03L-0:on 790927,during Mode 2 Operation,Control Element Assembly 46 Dropped to Lower Electrical Limit.Cause Not Stated.Gripper Voltage Was Increased to Facilitate Rod Withdrawal.Rod Was Realigned to Group Average

ML19254E301
Person / Time
Site:	Arkansas Nuclear
Issue date:	10/25/1979
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19254E288	List: ML19254E287 ML19254E296 ML19254E299 ML19254E301 ML19254E305
References
LER-79-084-03L, LER-79-84-3L, NUDOCS 7910310431
Download: ML19254E301 (1)

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8t G EVENT DESCRIPTION AND PROBABLE CONSECUENCES Oio r5T71 IDurina Mode 2 operation, CEA #46 dropped to the lower electrical limit. I o 3 IWith CEA #46 misaligned from the group average by more than 19 inches, i ois loperation in Mode 2 continued by Action Statement 3.1.3.lc. This i o s ioccurrence is similar to LER 50-368/79-083.

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43 44 l I9@4r CAUSE DESCRIPTION ANO LORREC flVE ACTIONS h i , eil Investigation did not reveal cause for rod drop. Power supplies and i i , iwiring were checked. The gripper voltage war increased to facilitate ,

, , , , , irod wi thdrawal . Rod was realigned to group average within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> meeting ,

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