ENS 50097

v t e ENS Event
12:32 May 4, 2014
Title	Manual Initiation of the Reactor Protection System While Shutdown
Event Description	On 5/4/14 while the plant was in Mode 3 and the reactor not critical, unexpected position indications were observed on a Control Rod while withdrawing an Axial Power Shaping Rod (APSR). Due to the uncertainty of rod positions, the APSR was inserted into the core. The reactor trip breakers were then opened from the Control Room using the manual trip pushbuttons. All Control and Safety Rods were unlatched and fully inserted into the reactor core before the reactor trip breakers were opened. This manual initiation of the Reactor Protection System with the reactor not critical is being reported per 10 CFR 50.72(b)(3)(iv)(A). The reportability of this event was determined based on an extent of condition review for Event Number 50086 that occurred 5/5/14. The failure to meet the 8-hour reporting requirement has been entered into the Corrective Action Program. The licensee notified the NRC Resident Inspector, the State of Ohio, and Ottawa and Lucas Counties.

ENS 50097 +/-
Where
Davis Besse Ohio (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
LER:	05000346/LER-2014-001 Regarding Manual Initiation of the Reactor Protection System Due to Unexpected Indication of Control Rod Movement
Time - Person (Reporting Time:+101.23 h4.218 days <br />0.603 weeks <br />0.139 months <br />)
Opened:	Robert W. Oesterle 17:46 May 8, 2014
NRC Officer:	Dong Park
Last Updated:	May 8, 2014
50097 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Davis Besse with 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2016-09-10T07:43:00 [Table view]
[ENS list for Davis Besse]

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