At 23:45 on 9/13/08, one control element assembly (
CEA) dropped to the bottom of the core from the upper electrical limit. Technical Specification
LCO 3.1.3.1 Action e. was entered. The
CEA was not able to be realigned with the other
CEA's in its group within the time constraints of the
COLR. Technical Specification
LCO 3.1.3.1 Action f. was entered and a down power to 70% was initiated. Actions to repair and retrieve the
CEA could not be completed within the time constraint of
LCO 3.1.3.1 Action f. and a shutdown was commenced to comply with Technical Specifications at 0241 on 9/14/08. The
CEA was recovered and restored to OPERABLE at 0258 on 9/14/08 and the shutdown was halted. The plant is currently being returned to full power operation. This four hour non-emergency report is being made pursuant to
10 CFR 50.72(b)(2)(i), 'The initiation of any nuclear plant shutdown required by Technical Specifications.'
The licensee notified the NRC Resident Inspector.
