Event Notification Report for October 16, 2000
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/15/2000 - 10/16/2000
Power Reactor
Event Number: 37432
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: JIM SCHOTTEL
HQ OPS Officer: STEVE SANDIN
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: JIM SCHOTTEL
HQ OPS Officer: STEVE SANDIN
Notification Date: 10/16/2000
Notification Time: 12:43 [ET]
Event Date: 10/16/2000
Event Time: 09:21 [CDT]
Last Update Date: 10/16/2000
Notification Time: 12:43 [ET]
Event Date: 10/16/2000
Event Time: 09:21 [CDT]
Last Update Date: 10/16/2000
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(ii) - RPS ACTUATION
10 CFR Section:
50.72(b)(2)(ii) - RPS ACTUATION
Person (Organization):
ROGER LANKSBURY (R3)
ROGER LANKSBURY (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M | N | 0 | Refueling | 0 | Refueling |
MANUAL SCRAM INSERTED PRIOR TO REACHING AUTOMATIC SCRAM SETPOINT FOLLOWING REPLACEMENT OF ATWS POWER SUPPLIES
"Clinton Power Station is currently in day 3 of refueling outage RF-7. At 09:20 I&C Technicians were performing PMs (PCIMSA017 and PCIMSA019) which replaced power supplies in the Anticipated Transient Without Scram system (ATWS). During reenergization of the ATWS system, the ARI (Alternate Rod Insertion) initiation alarm occurred. The 'A' RO observed Scram Discharge Volume Vents and Drains closing and a rising level in the Scram Discharge Volume (SDV). At 09:21 a manual scram was inserted at approximately 11 gallons SDV level prior to reaching the automatic scram setpoint of 19.6 gallons Scram Discharge Volume level.
"Prior to this event Reactor Water Level was at 195 inches. The extra input of water into the reactor due to this scram caused a level rise to 200 inches. The Reactor Operators raised Reactor Water Cleanup letdown rate from the RPV to bring level back to the preferred range of 190 - 200 inches.
"Investigation has revealed that reenergizing the ATWS instrumentation causes actuation of the ATWS trip system."
There was no rod motion since all rods were fully inserted prior to the event. The licensee informed the NRC resident inspector.
"Clinton Power Station is currently in day 3 of refueling outage RF-7. At 09:20 I&C Technicians were performing PMs (PCIMSA017 and PCIMSA019) which replaced power supplies in the Anticipated Transient Without Scram system (ATWS). During reenergization of the ATWS system, the ARI (Alternate Rod Insertion) initiation alarm occurred. The 'A' RO observed Scram Discharge Volume Vents and Drains closing and a rising level in the Scram Discharge Volume (SDV). At 09:21 a manual scram was inserted at approximately 11 gallons SDV level prior to reaching the automatic scram setpoint of 19.6 gallons Scram Discharge Volume level.
"Prior to this event Reactor Water Level was at 195 inches. The extra input of water into the reactor due to this scram caused a level rise to 200 inches. The Reactor Operators raised Reactor Water Cleanup letdown rate from the RPV to bring level back to the preferred range of 190 - 200 inches.
"Investigation has revealed that reenergizing the ATWS instrumentation causes actuation of the ATWS trip system."
There was no rod motion since all rods were fully inserted prior to the event. The licensee informed the NRC resident inspector.
Power Reactor
Event Number: 37433
Facility: QUAD CITIES
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: DARYL NOHR
HQ OPS Officer: STEVE SANDIN
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: DARYL NOHR
HQ OPS Officer: STEVE SANDIN
Notification Date: 10/17/2000
Notification Time: 12:13 [ET]
Event Date: 10/16/2000
Event Time: 18:30 [CDT]
Last Update Date: 10/17/2000
Notification Time: 12:13 [ET]
Event Date: 10/16/2000
Event Time: 18:30 [CDT]
Last Update Date: 10/17/2000
Emergency Class: NON EMERGENCY
10 CFR Section:
26.73 - FITNESS FOR DUTY
10 CFR Section:
26.73 - FITNESS FOR DUTY
Person (Organization):
ROGER LANKSBURY (R3)
ROGER LANKSBURY (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
| 2 | N | Y | 95 | Power Operation | 95 | Power Operation |
24-HOUR FITNESS-FOR-DUTY REPORT INVOLVING A CONTRACT SUPERVISOR
A contract supervisor was determined to be under the influence of alcohol during a test for cause. The individual's access to the plant has been terminated. Contact the Headquarters Operations Officers for additional details.
A contract supervisor was determined to be under the influence of alcohol during a test for cause. The individual's access to the plant has been terminated. Contact the Headquarters Operations Officers for additional details.