Event Notification Report for September 27, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/26/2023 - 09/27/2023
Agreement State
Event Number: 56760
Rep Org: Utah Division of Radiation Control
Licensee: Kleinfelder, Inc.
Region: 4
City: Spanish Fork State: UT
County:
License #: UT 1800085
Agreement: Y
Docket:
NRC Notified By: Ryan Johnson
HQ OPS Officer: Ernest West
Licensee: Kleinfelder, Inc.
Region: 4
City: Spanish Fork State: UT
County:
License #: UT 1800085
Agreement: Y
Docket:
NRC Notified By: Ryan Johnson
HQ OPS Officer: Ernest West
Notification Date: 09/27/2023
Notification Time: 18:23 [ET]
Event Date: 09/27/2023
Event Time: 14:00 [MDT]
Last Update Date: 09/27/2023
Notification Time: 18:23 [ET]
Event Date: 09/27/2023
Event Time: 14:00 [MDT]
Last Update Date: 09/27/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Young, Cale (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Young, Cale (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE - DAMAGED TROXLER GAUGE
The following information was provided by the Utah Division of Waste Management and Radiation Control via email:
"At approximately 1400 [CDT] on September 27, 2023, a Troxler 3440 portable gauge (serial number 37345) was run over by a water truck. The Troxler 3440 gauge has an 8 mCi Cs-137 source and a 40 mCi [Am-241/Be] source. The Utah radiation safety officer inspected the gauge at the job site and determined that the sources appeared to be undamaged and remained in the shielded position.
"The licensee took the gauge to another Utah licensee, Construction Materials Technologies (doing business as Precision Calibration) [with license number] UT1800143, for evaluation and repair."
Utah Event Report ID: UT23-0008
The following information was provided by the Utah Division of Waste Management and Radiation Control via email:
"At approximately 1400 [CDT] on September 27, 2023, a Troxler 3440 portable gauge (serial number 37345) was run over by a water truck. The Troxler 3440 gauge has an 8 mCi Cs-137 source and a 40 mCi [Am-241/Be] source. The Utah radiation safety officer inspected the gauge at the job site and determined that the sources appeared to be undamaged and remained in the shielded position.
"The licensee took the gauge to another Utah licensee, Construction Materials Technologies (doing business as Precision Calibration) [with license number] UT1800143, for evaluation and repair."
Utah Event Report ID: UT23-0008
Power Reactor
Event Number: 56759
Facility: Monticello
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: Brendon Eagle
HQ OPS Officer: John Russell
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: Brendon Eagle
HQ OPS Officer: John Russell
Notification Date: 09/27/2023
Notification Time: 15:28 [ET]
Event Date: 09/27/2023
Event Time: 10:41 [CDT]
Last Update Date: 09/28/2023
Notification Time: 15:28 [ET]
Event Date: 09/27/2023
Event Time: 10:41 [CDT]
Last Update Date: 09/28/2023
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation 50.72(b)(2)(iv)(B) - RPS Actuation - Critical
10 CFR Section:
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation 50.72(b)(2)(iv)(B) - RPS Actuation - Critical
Person (Organization):
Orlikowski, Robert (R3DO)
Orlikowski, Robert (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | A/R | Y | 75 | Power Operation | 0 | Hot Shutdown |
EN Revision Imported Date: 9/28/2023
EN Revision Text: ACTUATION OF REACTOR PROTECTION AND CONTAINMENT ISOLATION SYSTEMS
The following information was provided by the licensee via fax:
"[On 09/27/2023] at 1041 CDT, with the plant at 75 percent power and main turbine control valve testing in progress, a reactor pressure transient resulted in a reactor steam dome high pressure scram and subsequent group 1 primary containment isolation of the main steam lines (MSL). All main steam isolation valves closed as a result of the group 1 isolation signal. Additionally, a group 2 containment isolation signal was received due to reactor pressure vessel (RPV) level less than plus 9 inches during the transient. Operations personnel responded and stabilized the plant. The high-pressure coolant injection (HPCI) system was placed in service to control RPV pressure. HPCI did not inject into the RPV and was not needed to control RPV water level. The cause of the initial pressure transient is under investigation."
The NRC Resident Inspector has been notified.
***UPDATE ON 9/27/2023 AT 2350 EDT FROM NATHAN PIEPER TO LAWRENCE CRISCIONE***
The utility notified the State of Minnesota and Wright and Sherburne counties.
Notified R3DO (Orlikowski)
EN Revision Text: ACTUATION OF REACTOR PROTECTION AND CONTAINMENT ISOLATION SYSTEMS
The following information was provided by the licensee via fax:
"[On 09/27/2023] at 1041 CDT, with the plant at 75 percent power and main turbine control valve testing in progress, a reactor pressure transient resulted in a reactor steam dome high pressure scram and subsequent group 1 primary containment isolation of the main steam lines (MSL). All main steam isolation valves closed as a result of the group 1 isolation signal. Additionally, a group 2 containment isolation signal was received due to reactor pressure vessel (RPV) level less than plus 9 inches during the transient. Operations personnel responded and stabilized the plant. The high-pressure coolant injection (HPCI) system was placed in service to control RPV pressure. HPCI did not inject into the RPV and was not needed to control RPV water level. The cause of the initial pressure transient is under investigation."
The NRC Resident Inspector has been notified.
***UPDATE ON 9/27/2023 AT 2350 EDT FROM NATHAN PIEPER TO LAWRENCE CRISCIONE***
The utility notified the State of Minnesota and Wright and Sherburne counties.
Notified R3DO (Orlikowski)