Event Notification Report for July 28, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/27/2025 - 07/28/2025
Agreement State
Event Number: 57819
Rep Org: Texas Dept of State Health Services
Licensee: Braskem America Inc.
Region: 4
City: Freeport State: TX
County:
License #: 06443
Agreement: Y
Docket:
NRC Notified By: Sindiso Ncube
HQ OPS Officer: Tenisha Meadows
Licensee: Braskem America Inc.
Region: 4
City: Freeport State: TX
County:
License #: 06443
Agreement: Y
Docket:
NRC Notified By: Sindiso Ncube
HQ OPS Officer: Tenisha Meadows
Notification Date: 07/19/2025
Notification Time: 15:04 [ET]
Event Date: 07/18/2025
Event Time: 00:00 [CDT]
Last Update Date: 07/19/2025
Notification Time: 15:04 [ET]
Event Date: 07/18/2025
Event Time: 00:00 [CDT]
Last Update Date: 07/19/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - STUCK OPEN GAUGE SHUTTER
The following information was provided by the Texas Department of Health (the Department) via email:
"On July 19, 2025, the Department was notified by the licensee of a gauge shutter mechanism failure. A Vega gauge model SH-F2, containing a 300 millicurie cesium-137 sealed source, was reported to be stuck in the open position. Open is the normal operating position. The issue was discovered on July 18, 2025, and the licensee confirmed there is no risk of additional radiation exposure to the public or workers due to this on/off mechanism failure.
"Additional information will be provided in accordance with SA-300 reporting requirements."
Texas incident number: 10210
NMED number: TX250035
The following information was provided by the Texas Department of Health (the Department) via email:
"On July 19, 2025, the Department was notified by the licensee of a gauge shutter mechanism failure. A Vega gauge model SH-F2, containing a 300 millicurie cesium-137 sealed source, was reported to be stuck in the open position. Open is the normal operating position. The issue was discovered on July 18, 2025, and the licensee confirmed there is no risk of additional radiation exposure to the public or workers due to this on/off mechanism failure.
"Additional information will be provided in accordance with SA-300 reporting requirements."
Texas incident number: 10210
NMED number: TX250035
Non-Power Reactor
Event Number: 57824
Rep Org: Massachusetts Institute Of Tech (MITE)
Licensee: Massachusetts Institute Of Technology
Region: 0
City: Cambridge State: MA
County: Middlesex
License #: R-37
Agreement: Y
Docket: 05000020
NRC Notified By: Edward Lau
HQ OPS Officer: Ernest West
Licensee: Massachusetts Institute Of Technology
Region: 0
City: Cambridge State: MA
County: Middlesex
License #: R-37
Agreement: Y
Docket: 05000020
NRC Notified By: Edward Lau
HQ OPS Officer: Ernest West
Notification Date: 07/24/2025
Notification Time: 15:24 [ET]
Event Date: 07/24/2025
Event Time: 12:00 [EDT]
Last Update Date: 07/24/2025
Notification Time: 15:24 [ET]
Event Date: 07/24/2025
Event Time: 12:00 [EDT]
Last Update Date: 07/24/2025
Emergency Class: Non Emergency
10 CFR Section:
10 CFR Section:
Person (Organization):
Montgomery, Cindy (NRR)
Lin, Brian (NRR)
Montgomery, Cindy (NRR)
Lin, Brian (NRR)
TECHNICAL SPECIFICATION VIOLATION
The following information was provided by the licensee via phone and email:
On July 24, 2025, the licensee reported that it had violated Technical Specification 3.4.1.A. which requires the reactor to be secured when containment is not maintained. The console key switch was inserted while not having containment integrity. Prior to and at the time of the occurrence, the reactor was shutdown for more than two weeks for scheduled outage maintenance activities. Nuclear safety of the reactor was never challenged. This event did not cause the existence or development of an unsafe condition.
The NRC Project Manager was notified.
The following information was provided by the licensee via phone and email:
On July 24, 2025, the licensee reported that it had violated Technical Specification 3.4.1.A. which requires the reactor to be secured when containment is not maintained. The console key switch was inserted while not having containment integrity. Prior to and at the time of the occurrence, the reactor was shutdown for more than two weeks for scheduled outage maintenance activities. Nuclear safety of the reactor was never challenged. This event did not cause the existence or development of an unsafe condition.
The NRC Project Manager was notified.
Part 21
Event Number: 57827
Rep Org: Curtiss Wright Flow Control Co.
Licensee:
Region: 3
City: Cincinnati State: OH
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Margie Hover
HQ OPS Officer: Kerby Scales
Licensee:
Region: 3
City: Cincinnati State: OH
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Margie Hover
HQ OPS Officer: Kerby Scales
Notification Date: 07/25/2025
Notification Time: 09:47 [ET]
Event Date: 05/21/2025
Event Time: 00:00 [EDT]
Last Update Date: 07/25/2025
Notification Time: 09:47 [ET]
Event Date: 05/21/2025
Event Time: 00:00 [EDT]
Last Update Date: 07/25/2025
Emergency Class: Non Emergency
10 CFR Section:
21.21(a)(2) - Interim Eval Of Deviation
10 CFR Section:
21.21(a)(2) - Interim Eval Of Deviation
Person (Organization):
Zurawski, Paul (R3DO)
Part 21/50.55 Reactors, - (EMAIL)
Zurawski, Paul (R3DO)
Part 21/50.55 Reactors, - (EMAIL)
PART 21 INTERIM REPORT OF DEVIATION
The following is a synopsis of information provided by Curtiss-Wright (CW) via email:
On 5/21/2025, Xcel Energy notified Curtiss-Wright about the failure of two NAMCO limit switches provided under CW project CJ21087 (tag number CJ2108701, serial numbers 01 and 04). The limit switches were dedicated by CW and shipped on 2/28/2025 to Xcel Energy. The switches failed a bench test performed by Xcel Energy, which aimed to verify that the contacts properly revert to their original state during spring return. Xcel Energy found that the contacts reverted to their original state prior to the audible click/snap, which is supposed to indicate contact changeover.
The two units were returned to Curtiss-Wright on 5/29/2025. The test result was fully duplicated on one of the switches. For the other switch (serial number 04), the switch contacts intermittently failed to return to the original state at all, requiring manual assistance to do so.
On 6/26/2025, CW sent the parts to NAMCO for repair. CW retested the parts after the repair. Part 04 still had the same issue with failing to reset as noted earlier. That limit switch was returned to NAMCO for a full evaluation.
CW anticipates an update to this notification with final results on 9/23/2025.
Potentially affected U.S. nuclear power plants: unknown at the time of the notification.
Contact Information:
Mark Papke
Quality Assurance Manager
Curtiss-Wright
4600 East Tech Drive
Cincinnati, OH 45245
mpapke@curtisswright.com
The following is a synopsis of information provided by Curtiss-Wright (CW) via email:
On 5/21/2025, Xcel Energy notified Curtiss-Wright about the failure of two NAMCO limit switches provided under CW project CJ21087 (tag number CJ2108701, serial numbers 01 and 04). The limit switches were dedicated by CW and shipped on 2/28/2025 to Xcel Energy. The switches failed a bench test performed by Xcel Energy, which aimed to verify that the contacts properly revert to their original state during spring return. Xcel Energy found that the contacts reverted to their original state prior to the audible click/snap, which is supposed to indicate contact changeover.
The two units were returned to Curtiss-Wright on 5/29/2025. The test result was fully duplicated on one of the switches. For the other switch (serial number 04), the switch contacts intermittently failed to return to the original state at all, requiring manual assistance to do so.
On 6/26/2025, CW sent the parts to NAMCO for repair. CW retested the parts after the repair. Part 04 still had the same issue with failing to reset as noted earlier. That limit switch was returned to NAMCO for a full evaluation.
CW anticipates an update to this notification with final results on 9/23/2025.
Potentially affected U.S. nuclear power plants: unknown at the time of the notification.
Contact Information:
Mark Papke
Quality Assurance Manager
Curtiss-Wright
4600 East Tech Drive
Cincinnati, OH 45245
mpapke@curtisswright.com
Agreement State
Event Number: 57821
Rep Org: NC Div of Radiation Protection
Licensee: Instrotek
Region: 1
City: Durham State: NC
County:
License #: 032-1073-1
Agreement: Y
Docket:
NRC Notified By: Travis Cartoski
HQ OPS Officer: Brian P. Smith
Licensee: Instrotek
Region: 1
City: Durham State: NC
County:
License #: 032-1073-1
Agreement: Y
Docket:
NRC Notified By: Travis Cartoski
HQ OPS Officer: Brian P. Smith
Notification Date: 07/22/2025
Notification Time: 12:30 [ET]
Event Date: 05/08/2025
Event Time: 00:00 [EDT]
Last Update Date: 07/22/2025
Notification Time: 12:30 [ET]
Event Date: 05/08/2025
Event Time: 00:00 [EDT]
Last Update Date: 07/22/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Dentel, Glenn (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Dentel, Glenn (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - CONTAMINATION EVENT
The following report was received by the North Carolina Division of Radiation Protection via email:
"On May 8, 2025, the licensee reported that a source [Am-241/Be, CPN23, 50mCi] was ruptured during a source recovery task. The source was being removed from a nuclear gauge down hole probe. Once the source was removed from the probe, it was immediately leak tested. Two leak tests were performed and both readings pegged at full scale on the licensee's GM Pancake Survey Meter. The area was immediately cleared and one individual (the person conducting the source removal) was found to have contamination on their hands at 6000 CPM and 3500 CPM on portions of their clothes. This person was immediately decontaminated and a follow-up urine bioassay revealed less than minimum detectable levels. No other employees were contaminated, and the source was secured, awaiting disposal via a radioactive waste broker. Additional surveys of the work area revealed areas that required decontamination. The area was secured from entry and is awaiting decontamination by an outside vendor."
North Carolina Event Number: 250009
The following report was received by the North Carolina Division of Radiation Protection via email:
"On May 8, 2025, the licensee reported that a source [Am-241/Be, CPN23, 50mCi] was ruptured during a source recovery task. The source was being removed from a nuclear gauge down hole probe. Once the source was removed from the probe, it was immediately leak tested. Two leak tests were performed and both readings pegged at full scale on the licensee's GM Pancake Survey Meter. The area was immediately cleared and one individual (the person conducting the source removal) was found to have contamination on their hands at 6000 CPM and 3500 CPM on portions of their clothes. This person was immediately decontaminated and a follow-up urine bioassay revealed less than minimum detectable levels. No other employees were contaminated, and the source was secured, awaiting disposal via a radioactive waste broker. Additional surveys of the work area revealed areas that required decontamination. The area was secured from entry and is awaiting decontamination by an outside vendor."
North Carolina Event Number: 250009