ENS 50009

v t e ENS Event
16:27 Apr 8, 2014
Title	Report of Technical Specification Violation
Event Description	Event details: While performing a routine reactor pulse for surveillance purposes, the signal input cable to one of the power monitoring safety channels was disconnected, making the associated high power scram not functional. The pulsing procedure requires disconnecting this cable for preoperational testing, but states that the instrument input be returned to its normal operating status prior to actually performing the operation. Contrary to the procedure, this was not done and the reactor was operated at 2 watts for 7 minutes without that required safety channel operating. A second safety channel was fully operational during that time. The high power scrams are not required during pulse mode operations. The disconnected cable was subsequently discovered and reconnected. The licensee informed the NRR Program Manager (Morlang).

ENS 50009 +/-
Where
U. S. Geological Survey Denver, Colorado (NRC Region 4)
License number:	R-113
Reporting

Non
Time - Person (Reporting Time:+-2.52 h-0.105 days <br />-0.015 weeks <br />-0.00345 months <br />)
Opened:	Tim Debey 13:56 Apr 8, 2014
NRC Officer:	Steve Sandin
Last Updated:	Apr 8, 2014
50009 - NRC Website
v • d • e

v t e Emergency Notification System
U. S. Geological Survey with Non
WEEKMONTHYEAR2014-04-08T16:27:00 [Table view]
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