Release of Halon into the Unit 2 Cable Spreading Room. No indication of fire in the area.
HU3.1 (Toxic, corrosive, asphyxiant or flammable gases in amounts that have or could adversely affect normal plant operations) was declared at 2154 CDT due to Halon release and Oxygen levels below safe habitability conditions (19% oxygen). Ability still exists to maintain safe operations and safely shut down the reactor.
No adverse plant response or control board alarms indicated. No smoke or fire in the room and access is provided with SCBA.
Escalation criteria would be if not able to maintain safe operations or safely shut down the reactor.
Exit criteria would be when normal oxygen levels are restored to Unit 2 Cable Spreading Room.
Local NRC resident notified at 2223 CDT.
Unit 2 is stable at 100% power. Unit 1 was not affected and remains stable at 100% power.
The licensee notified the State of Texas, the local counties, and the NRC Resident Inspector.
Notified DHS, FEMA, and NICC. FEMA NWC and Nuclear SSA were notified via email.
- * * UPDATE FROM SCOTT HARVEY TO CHARLES TEAL AT 1642 EDT ON 6/12/14 * * *
At 0330 CDT the Unusual Event was terminated.
The licensee notified the NRC Resident Inspector.
Notified R4DO (Werner),
NRR (Uhle),
IRD (Grant),
DHS,
FEMA, and
NICC.
FEMA NWC and Nuclear
SSA were notified via email.
