Event Notification Report for June 18, 2021
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/17/2021 - 06/18/2021
Non-Agreement State
Event Number: 55318
Rep Org: AK Steel Corporation
Licensee: AK Steel Corporation - Dearborn Works
Region: 3
City: Dearborn State: MI
County:
License #: 21-26151-01
Agreement: N
Docket:
NRC Notified By: Garet Salomon
HQ OPS Officer: Lloyd Desotell
Licensee: AK Steel Corporation - Dearborn Works
Region: 3
City: Dearborn State: MI
County:
License #: 21-26151-01
Agreement: N
Docket:
NRC Notified By: Garet Salomon
HQ OPS Officer: Lloyd Desotell
Notification Date: 06/18/2021
Notification Time: 14:42 [ET]
Event Date: 06/18/2021
Event Time: 00:00 [EDT]
Last Update Date: 06/19/2021
Notification Time: 14:42 [ET]
Event Date: 06/18/2021
Event Time: 00:00 [EDT]
Last Update Date: 06/19/2021
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):
HILLS, DAVID (R3)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
HILLS, DAVID (R3)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
EN Revision Imported Date: 7/16/2021
EN Revision Text: STUCK SHUTTER
The following information was received from the licensee via phone call:
During a routine inspection, the licensee found that a fixed nuclear gauge had a shutter stuck in the open position. The open position is its normal operating position. The gauge is located in an elevated position and is surrounded by fencing. The gauge contains a 1 Ci Am-241 source.
Gauge Serial #: G440039
Manufacturer: Thermo Fisher
EN Revision Text: STUCK SHUTTER
The following information was received from the licensee via phone call:
During a routine inspection, the licensee found that a fixed nuclear gauge had a shutter stuck in the open position. The open position is its normal operating position. The gauge is located in an elevated position and is surrounded by fencing. The gauge contains a 1 Ci Am-241 source.
Gauge Serial #: G440039
Manufacturer: Thermo Fisher
Part 21
Event Number: 55551
Rep Org: United Controls International
Licensee:
Region: 2
City: Norcross State: GA
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Rob Hale
HQ OPS Officer: Donald Norwood
Licensee:
Region: 2
City: Norcross State: GA
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Rob Hale
HQ OPS Officer: Donald Norwood
Notification Date: 10/28/2021
Notification Time: 17:14 [ET]
Event Date: 06/18/2021
Event Time: 00:00 [EDT]
Last Update Date: 10/28/2021
Notification Time: 17:14 [ET]
Event Date: 06/18/2021
Event Time: 00:00 [EDT]
Last Update Date: 10/28/2021
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
Miller, Mark (R2DO)
Pick, Greg (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
Miller, Mark (R2DO)
Pick, Greg (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
EN Revision Imported Date: 11/26/2021
EN Revision Text: PART 21 REPORT - FAILURE OF A BASLER ELECTRIC TRANSFORMER IN A YORK TEMPERATURE CONTROL MODULE
The following is a synopsis of information received via facsimile:
On June 18, 2021, STP Nuclear Operating Company returned a York TCM-1A temperature control module with the reported issue that the module would not respond in auto or manual vane control and that internal relays 1R and 2R would not pick up. The subject temperature control module was previously returned by STP Nuclear Operating Company to United Controls International (UCI) for refurbishment and modification, after which it was returned by UCI to STP Nuclear Operating Company on March 13, 2017.
Troubleshooting performed by UCI identified that the secondary of the Basler Electric BE13410001 transformer that is used to isolate and step down the input voltage from 115V AC to 22V AC had an open circuit. When the subject transformer was bypassed, the module operated as designed. UCI is unable to determine the cause of the transformer failure. Post refurbishment/modification testing performed by UCI included verifying functionality of the unit before and after performance of a 48 hr. burn-in period.
The only facility that is listed as being affected is STP Nuclear Operating Company.
If you have any questions or wish to discuss this matter or this report, please contact: Wesley Hickle, Engineering Manager, whickle@unitedcontrols.com, 470-610-0870.
EN Revision Text: PART 21 REPORT - FAILURE OF A BASLER ELECTRIC TRANSFORMER IN A YORK TEMPERATURE CONTROL MODULE
The following is a synopsis of information received via facsimile:
On June 18, 2021, STP Nuclear Operating Company returned a York TCM-1A temperature control module with the reported issue that the module would not respond in auto or manual vane control and that internal relays 1R and 2R would not pick up. The subject temperature control module was previously returned by STP Nuclear Operating Company to United Controls International (UCI) for refurbishment and modification, after which it was returned by UCI to STP Nuclear Operating Company on March 13, 2017.
Troubleshooting performed by UCI identified that the secondary of the Basler Electric BE13410001 transformer that is used to isolate and step down the input voltage from 115V AC to 22V AC had an open circuit. When the subject transformer was bypassed, the module operated as designed. UCI is unable to determine the cause of the transformer failure. Post refurbishment/modification testing performed by UCI included verifying functionality of the unit before and after performance of a 48 hr. burn-in period.
The only facility that is listed as being affected is STP Nuclear Operating Company.
If you have any questions or wish to discuss this matter or this report, please contact: Wesley Hickle, Engineering Manager, whickle@unitedcontrols.com, 470-610-0870.