Event Notification Report for June 11, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/10/2025 - 06/11/2025
EVENT NUMBERS
57756
57756
Non-Agreement State
Event Number: 57756
Rep Org: Cleveland Cliffs
Licensee: Cleveland Cliffs
Region: 3
City: Dearborn State: MI
County: Wayne
License #: 21-26151-01
Agreement: N
Docket:
NRC Notified By: Wayne Langdon
HQ OPS Officer: Kerby Scales
Licensee: Cleveland Cliffs
Region: 3
City: Dearborn State: MI
County: Wayne
License #: 21-26151-01
Agreement: N
Docket:
NRC Notified By: Wayne Langdon
HQ OPS Officer: Kerby Scales
Notification Date: 06/11/2025
Notification Time: 14:20 [ET]
Event Date: 06/11/2025
Event Time: 11:04 [EDT]
Last Update Date: 06/12/2025
Notification Time: 14:20 [ET]
Event Date: 06/11/2025
Event Time: 11:04 [EDT]
Last Update Date: 06/12/2025
Emergency Class: Non Emergency
10 CFR Section:
30.50(b)(2) - Safety Equipment Failure
10 CFR Section:
30.50(b)(2) - Safety Equipment Failure
Person (Organization):
Ziolkowski, Michael (R3DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Ziolkowski, Michael (R3DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
STUCK OPEN SHUTTER
The following is a summary of information provided by the licensee via phone and email:
On June 11, 2025, at 1104 EDT, the licensee discovered a stuck open shutter while performing daily checks on an x-ray gauge. The gauge is in an area that is taped off and poses no exposure risk to personnel or the public. The manufacturer is planning an on-site inspection and assessment of the gauge.
Gauge Model Number: Thermo Rm200EM
Gauge Serial Number: 543893
Source Activity: 1000 mCi (Americium-241)
Source Model Number: AM1.GXX
Source Serial Number: G44/004/09
* * * UPDATE ON 06/12/25 AT 1355 EDT FROM WAYNE LANGDON TO KERBY SCALES * * *
The following is a summary of information received from the licensee via phone and email:
The manufacturer (Thermo EGS Gauging) was on-site and inspected the unit. They identified that the magnetic coil position holding the shutter flag when it de-energized needed to be adjusted. Adjustments to its position were made, and the shutter is now working as designed.
Notified R3DO (Ziolkowski) and NMSS Events Notifications via email.
The following is a summary of information provided by the licensee via phone and email:
On June 11, 2025, at 1104 EDT, the licensee discovered a stuck open shutter while performing daily checks on an x-ray gauge. The gauge is in an area that is taped off and poses no exposure risk to personnel or the public. The manufacturer is planning an on-site inspection and assessment of the gauge.
Gauge Model Number: Thermo Rm200EM
Gauge Serial Number: 543893
Source Activity: 1000 mCi (Americium-241)
Source Model Number: AM1.GXX
Source Serial Number: G44/004/09
* * * UPDATE ON 06/12/25 AT 1355 EDT FROM WAYNE LANGDON TO KERBY SCALES * * *
The following is a summary of information received from the licensee via phone and email:
The manufacturer (Thermo EGS Gauging) was on-site and inspected the unit. They identified that the magnetic coil position holding the shutter flag when it de-energized needed to be adjusted. Adjustments to its position were made, and the shutter is now working as designed.
Notified R3DO (Ziolkowski) and NMSS Events Notifications via email.