Event Notification Report for November 09, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/08/2010 - 11/09/2010
EVENT NUMBERS
46407
Power Reactor
Event Number: 46407
Facility: MONTICELLO
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: RANDY SAND
HQ OPS Officer: JOHN SHOEMAKER
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: RANDY SAND
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 11/09/2010
Notification Time: 15:13 [ET]
Event Date: 11/09/2010
Event Time: 11:39 [CST]
Last Update Date: 11/09/2010
Notification Time: 15:13 [ET]
Event Date: 11/09/2010
Event Time: 11:39 [CST]
Last Update Date: 11/09/2010
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
ANN MARIE STONE (R3DO)
ANN MARIE STONE (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 47 | Power Operation | 47 | Power Operation |
OFFSITE NOTIFICATION - VIOLATION OF THE DISCHARGE PERMIT
"The Minnesota Pollution Control Agency was notified [on 11/9/10] at 1139 hours [CST] today that at Monticello, the Circulating Water and Service Water Streams were simultaneously chlorinated for a duration of approximately one (1) hour. Simultaneous chlorination of these two water streams is a violation of the National Pollutant Discharge Elimination System (NPDES) Permit. Chapter 4, Section 2.3, states, 'The condenser cooling water and the service water shall not be chlorinated simultaneously.' Upon discovery of this event, both the Service Water and the Circulating Water bleach injection skids were secured.
"This event did not result in bleach discharge concentration in excess of the 0.038 ppm concentration set forth in the NPDES permit."
The licensee notified NRC Resident Inspector.
"The Minnesota Pollution Control Agency was notified [on 11/9/10] at 1139 hours [CST] today that at Monticello, the Circulating Water and Service Water Streams were simultaneously chlorinated for a duration of approximately one (1) hour. Simultaneous chlorination of these two water streams is a violation of the National Pollutant Discharge Elimination System (NPDES) Permit. Chapter 4, Section 2.3, states, 'The condenser cooling water and the service water shall not be chlorinated simultaneously.' Upon discovery of this event, both the Service Water and the Circulating Water bleach injection skids were secured.
"This event did not result in bleach discharge concentration in excess of the 0.038 ppm concentration set forth in the NPDES permit."
The licensee notified NRC Resident Inspector.