Event Notification Report for March 06, 2011
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/05/2011 - 03/06/2011
EVENT NUMBERS
46660
Power Reactor
Event Number: 46660
Facility: TURKEY POINT
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: PAUL REIMERS
HQ OPS Officer: JOHN KNOKE
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: PAUL REIMERS
HQ OPS Officer: JOHN KNOKE
Notification Date: 03/06/2011
Notification Time: 19:38 [ET]
Event Date: 03/06/2011
Event Time: 16:44 [EST]
Last Update Date: 03/06/2011
Notification Time: 19:38 [ET]
Event Date: 03/06/2011
Event Time: 16:44 [EST]
Last Update Date: 03/06/2011
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
MALCOLM WIDMANN (R2DO)
MALCOLM WIDMANN (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | M/R | Y | 23 | Power Operation | 0 | Hot Standby |
MANUAL REACTOR TRIP DUE TO SECONDARY SODIUM CONCENTRATIONS EXCEEDING CHEMISTRY LIMITS
"This is a 4-hr Non-Emergency notification to the NRCOC [Nuclear Regulatory Commission Operations Center] for an event that results in actuation of the Reactor Protection System (RPS) when the reactor is critical in accordance with 10CFR50.72(b)(2)(iv)(B).
"On 3/6/11 at approx 16:20 [EST], Steam Generator sodium concentrations started to rise and exceeded 3-ONOP-071.1 (Secondary Chemistry Deviation from limits) Action Level 3 criteria (250 ppb Sodium). The plant power was reduced to 25% per 3-ONOP-100, Fast Load Reduction, and a manual plant trip [was] initiated per procedure at 16:44 [EST]. Unit [3] is stabilized in Mode 3, and [the licensee] is performing secondary clean-up."
All rods fully inserted. All safety systems functioned as required. The reactor trip was uncomplicated. Unit 4 was unaffected by this event.
The licensee has notified the NRC Resident Inspector.
"This is a 4-hr Non-Emergency notification to the NRCOC [Nuclear Regulatory Commission Operations Center] for an event that results in actuation of the Reactor Protection System (RPS) when the reactor is critical in accordance with 10CFR50.72(b)(2)(iv)(B).
"On 3/6/11 at approx 16:20 [EST], Steam Generator sodium concentrations started to rise and exceeded 3-ONOP-071.1 (Secondary Chemistry Deviation from limits) Action Level 3 criteria (250 ppb Sodium). The plant power was reduced to 25% per 3-ONOP-100, Fast Load Reduction, and a manual plant trip [was] initiated per procedure at 16:44 [EST]. Unit [3] is stabilized in Mode 3, and [the licensee] is performing secondary clean-up."
All rods fully inserted. All safety systems functioned as required. The reactor trip was uncomplicated. Unit 4 was unaffected by this event.
The licensee has notified the NRC Resident Inspector.