MANUAL REACTOR SCRAM River Bend (LA), 10/09/2025 "On October 9, 2025, at 1207 CDT, River Bend Station (RBS) was operating at 100 percent reactor power when a manual reactor protection system (RPS) actuation was inserted as a result of a division-I balance of plant (BOP) isolation. The BOP […]

MEDICAL EVENT Dallas, TX, 09/25/2025 "On October 3, 2025, the Department received notification from the licensee regarding a treatment error during stereotactic radiosurgery with a gamma knife system for a patient with a brain arteriovenous malformation (AVM). The patient was prescribed a total […]

STUCK OPEN GAUGE SHUTTER Ashdown, AR, 10/02/2025 During routine gauge shutter checks conducted by the licensee on October 2, 2025, the licensee found the shutters of three Berthold Technologies model LB300L fixed gauges stuck in the open position. The licensee has flagged the gauges, placed […]

DAMAGED MOISTURE DENSITY GAUGE Stillwater, MN, 10/02/2025 "The licensee had an InstroTek portable gauge containing 10 mCi Cs-137 and 40 mCi Am-241/Be sealed sources at a temporary jobsite. The gauge was run over by a compaction roller. The work site was cordoned off and the roller shut off. The […]

STUCK SOURCE Hammond, IL, 10/01/2025 "The Agency was contacted on October 1, 2025, at 1415 CDT, by the radiation safety officer (RSO) for TEAM Industrial Services to advise of a radiography source stuck in the exposed position at a temporary worksite in Bethalto, IL. The RSO responded to the […]

FITNESS FOR DUTY EVENT Salem (NJ), 10/06/2025 A licensee non-licensed supervisor failed a random fitness-for-duty test. The individual was not on-site at the time of the determination. The individual's access has been revoked. The NRC Resident Inspector has been notified […]

EN Revision Imported Date: 10/7/2025 Surry (VA), 10/06/2025 "On October 6, 2025, at 0627 EDT, a notification to the Occupational Safety and Health Administration (OSHA) was initiated due to a Dominion employee experiencing a non-work-related medical event that resulted in the employee passing […]

AUTOMATIC REACTOR SCRAM Clinton (IL), 10/06/2025 "At 0321 CDT on 10/6/2025, with Unit 1 in mode 1 at 23 percent power, the reactor automatically tripped due to reactor water level rising to the reactor protection system auto-scram setpoint, prior to the manual scram being completed. The trip was […]

LOST RADIATION SHIELD Orlando, FL, 09/30/2025 "BRC received notification from Orlando Health on September 30, 2025, that a depleted uranium shield was disposed of alongside its Nuclear Medicine Adac Camera model MCD/AC. It was last accounted for in 2014. The shield was likely disposed of […]

MEDICAL EVENT Westwood, KS, 09/29/2025 On September 29, 2025, the University of Kansas Hospital Authority reported that a patient had received a seed for localized treatment of a tumor in their breast tissue. The seed was inserted on July 30, 2025. The patient returned the following day, very […]

TWO TRAINS OF ECCS INOPERABLE South Texas (TX), 10/02/2025 "On October 2, 2025, at 1651 CDT, essential cooling water pump '1C' tripped. Essential chiller '1C' and cascading equipment, including emergency core cooling system (ECCS) train '1C,' was declared inoperable. "Essential chiller '12A' […]

LOST EXIT SIGNS Pueblo, CO, 02/04/2025 The Department received a notification from the licensee that three exit signs containing 17.5 Ci of tritium each were lost in Pueblo, Colorado. Manufacturer: SRB Technologies Model number: BR-20-BK Isotope: H-3 Activity: 52.5 Ci Event report ID number […]

LOST SOURCE Crystal River, FL, 09/26/2025 "The radiation safety officer (RSO) with Citrus Cardiology Consultants in Crystal River, Florida, called the BRC this afternoon regarding a lost 94.6 microcurie Ge-68 source, S/N 2509-89. The RSO said the source is used in a BQC Styrofoam pillow for […]

VEHICLE CARRYING NUCLEAR GAUGE INVOLVED IN AN ACCIDENT Chesterfield, VA, 09/26/2025 "At approximately 1020 EDT on September 26, 2025, VRMP was notified of an automobile accident involving a vehicle carrying a portable nuclear gauge. At approximately 0820 EDT on September 26, 2025, a Troxler […]

LOST EXIT SIGNS Boulder, CO, 09/25/2025 The Department received notification from the licensee that 10 exit signs containing 9.5 Ci of tritium each were lost in Boulder, Colorado. Manufacturer: Isolite Corporation Model number: 880-12-6 Isotope: H-3 Activity: 95 Ci Colorado event report ID […]

MEDICAL EVENT Los Angeles, CA, 09/24/2025 "The University of California Los Angeles (UCLA) reported to RHB that a reportable medical event (underdose) had occurred on September 24, 2025. A patient was to receive 200 mCi of Lu-177 Lutathera for a neuroendocrine tumor via an intravenous line and a […]

LOST EXIT SIGN Boulder, CO, 09/25/2025 The Department received a notification from the licensee that one (1) exit sign containing 7.62 Ci of tritium was lost in Boulder, Colorado. Manufacturer: Isolite Corporation Model Number: 880-12-6 Isotope: H-3 Activity: 7.62 Ci Event Report ID No […]

DEFECTIVE SOLENOID VALVE ASSEMBLY Pleasant Prairie, WI, 09/19/2025 Forty (40) incorrectly assembled solenoid valve assemblies were sent to Trillium Flow Technologies (TFT). On September 19, 2025, following a report by TFT that one of their customers was experiencing functionality issues, testing […]

LOST MOISTURE DENSITY GAUGE Sarasota, FL, 09/24/2025 On September 24, 2025, BRC received a report from the licensee regarding the loss of control of a moisture density gauge on the same date. The initial report was that the device had been stolen, but subsequent video footage indicated that the […]

UNABLE TO RETRACT SOURCE Waukesha, WI, 09/23/2025 "On September 23, 2025, the Department received notification that, on the same date, the licensee was unable to retract a radiography source containing approximately 12.5 curies of Ir-192 into the fully shielded position. The licensee could not […]

LOST SOURCE Hinsdale, IL, 09/23/2025 "As a result of an ongoing Agency investigation into unresponsive general licensees, the Agency became aware of one (1) generally licensed fluorescence analyzer device containing 40 millicuries of Cd-109 (Cat 4 source) that is missing. "Reportedly, in 2023 […]

TWO TRAINS OF ECCS INOPERABLE South Texas (TX), 09/25/2025 "On 9/23/2025 at 2214 CDT, the South Texas Project Unit 1 (STP-1) Train B reactor containment fan cooler (RCFC) chilled water supply outside containment isolation valve (OCIV) 1-CC-MOV-0137 was declared inoperable due to a material […]

LOST SOURCE Memphis, TN, 08/25/2025 "This loss of material report is prepared per 10 CFR 20.2201(a)(1)(ii) for a loss of material of a Ra-223 dichloride (Xofigo) radiopharmaceutical package that was lost on 8/25/2025, by a [common carrier]. The package left the facility of RAM license […]

MEDICAL EVENT Birmingham, AL, 09/03/2025 On September 3, 2025, an administering physician encountered resistance while delivering a dose of Y-90 Theraspheres. The patient received 67.2 mCi of a prescribed 90.7 mCi (24.4 percent underdose). The delivery apparatus was placed in storage to decay […]

PACKAGE EXCEEDED EXTERNAL RADIATION LIMIT St. Rose, LA, 09/12/2025 The licensee reported that a package received from the Colorado School of Mines, containing a 1.166 mCi Co-57 source (model MC07.122, serial number: 31.23, manufacturer unknown at the time of the report) had measured external […]

MEDICAL EVENT Minneapolis, MN, 09/11/2025 "On September 11, 2025, a TheraSphere treatment (yttrium-90 microspheres) was performed where the activity in the written directive was 66.15 mCi [and] the measured activity was 64.4 mCi. After the procedure, the licensee measured the residual activity […]

STOLEN MOISTURE DENSITY GAUGE Humble, TX, 09/12/2025 "On September 12, 2025, the Department received a report of a stolen Troxler model 3440 moisture density gauge (8 mCi Cs-137, 40 mCi Am-241/Be). The gauge was stolen from a licensee vehicle outside of a hotel in Humble, Texas. The theft was […]

STUCK OPEN GAUGE SHUTTER Morris, IL, 09/12/2025 "The Agency was notified on September 12, 2025, by Equistar Chemicals LP of Morris, IL, regarding a stuck shutter. During the performance of the routine semi-annual inventory, the following nuclear gauge was found to have the shutter stuck in the […]

DAMAGED MOISTURE DENSITY GAUGE Mount Carmel, IL, 09/11/2025 On September 11, 2025, the licensee reported a moisture density gauge, an Instrotek model 3500 (serial number: 5208), was damaged in Macoupin County, Illinois. The source rod was reported to be intact. Agency staff responded to the […]

LOST/RECOVERED MOISTURE DENSITY GAUGE Silverthorne, CO, 09/11/2025 "On September 11, 2025, at approximately 1930 MDT, the Department received a phone call from the Jefferson County Sheriff's Office regarding a vehicle that was stolen in Silverthorne, CO. Within the vehicle was a InstroTek Model […]

EQUIPMENT FAILURE Madison, WI, 09/11/2025 "On September 11, 2025, at 1306 CDT, the Department received a telephone notification that the licensee's Jubilant DraxImage Inc. RUBY-FILL Rb-82 generator (Serial Number: GLO03160183) was unable to deliver a patient dose at approximately 1000 CDT on […]

DAMAGED PORTABLE MOISTURE DENSITY GAUGE Westmoreland, VA, 09/10/2025 "On September 10, 2025, at approximately 1500 EDT, RMP was notified of an incident involving damage to a portable nuclear gauge. "Earlier, at approximately 1230, a Troxler Model 4640 B portable nuclear moisture density gauge […]

FOUND DENSITY GAUGE San Antonio, TX, 09/11/2025 "On September 11, 2025, at 0412 CDT, the Agency received a notification from the Austin Fire Department that it had recovered a Humboldt 5001EZ moisture density gauge. The gauge contained a 40 Am-241:Be sealed source and a 10 millicurie cesium-137 […]

LOST EXIT SIGN Meeker, CO, 07/28/2025 The Department received a notification from the licensee that one (1) exit sign containing 10 Ci of tritium was lost in Meeker, Colorado. Manufacturer: Isolite Corporation Model Number: SLX60 Isotope: H-3 Activity: 10 Ci Event Report ID No.: CO250027 THIS […]

LOST EXIT SIGNS Denver, CO, 08/01/2025 The Department received a notification from the licensee that eight (8) exit signs, containing a total of 65.65 Ci of tritium were lost in Denver, Colorado. Manufacturer: SRB Technologies & Isolite Corporation Model Number: BXU10GS (1 sign), BR-10-BK (2 […]

LOST EXIT SIGNS Woodland Park, CO, 09/09/2025 The following is a summary of information provided by the Colorado Department of Public Health and Environmental (the Department) via email. The Department received a notification from LDS Church that seventeen (17) exit signs, each with 14.5 Ci of […]

TECHNICAL SPECIFICATION REQUIRED REPORT Manhattan, KS, 09/10/2025 "A reportable occurrence [was] identified on September 15, 2025, for a failure to implement administrative controls. Per technical specification 6.2(b).4, the facility reactor safeguards committee (RSC) shall determine whether […]

MANUAL REACTOR TRIP Comanche Peak (TX), 09/14/2025 "At 2020 CDT [on 9/14/2025], [Comanche Peak] Unit 2 reactor was manually tripped due to a malfunction of the electro-hydraulic control (EHC) system on the main turbine. All auxiliary feedwater pumps started due to steam generator `Lo-Lo' levels […]

LOST I-125 SEED Springfield, MA, 08/11/2025 "On August 11, 2025, three radioactive iodine-125 sealed sources (seeds) were removed from a patient receiving a radioactive seed localization procedure. The licensee expected to remove four I-125 seeds, which were placed in the patient on August 8 […]

LOST SOURCES Morton Grove, IL, 08/27/2025 "As a result of an ongoing Agency investigation into unresponsive general licensees, the Agency became aware that two (2) generally licensed gas chromatography devices containing 15 millicuries of Ni-63 are missing. "Reportedly, on or about February 2023 […]

MANUAL REACTOR SCRAM Hatch (GA), 09/13/2025 "On September 13, 2025, at 1704 EDT, with Unit 2 in mode 1 at 70 percent power performing main turbine testing, the Unit 2 reactor was manually tripped due to loss of both reactor recirculation pumps. Due to the power level at the time, closure of […]

TRANSPORTED PACKAGE EXCEEDS LIMITS Port Allen, LA, 09/08/2025 On September 8, 2025, LDEQ was notified by QSA Global in Port Allen, LA, that they received a package with readings of 1 R/hr on contact of the external surface of one side of the package. Upon opening the package, it was found to […]

PACKAGE MISSING IN TRANSIT Arlington Heights, IL, 09/04/2025 "On September 4, 2025, the Agency received a notification from GE Healthcare in Arlington Heights, IL, to advise of a radiopharmaceutical package missing in transit. The package was shipped via [common carrier] on Thursday, August 21 […]

BOTH TRAINS OF CENTRIFUGAL CHARGING SYSTEM INOPERABLE Callaway (MO), 09/11/2025 "On September 11, 2025, Callaway was performing a planned maintenance window causing the 'B' train emergency diesel generator and the 'B' train essential service water system to be inoperable. At 0255 CDT the 'A' […]

OFFSITE NOTIFICATION Oconee (SC), 09/10/2025 "At 1207 EDT on September 10, 2025, Oconee Nuclear Station Unit 1 declared an unusual event (Event number 57914). A small reactor coolant system (RCS) leak occurred during routine RCS letdown filter maintenance. The letdown filters were bypassed, and […]

RCS IDENTIFIED LEAKAGE GREATER THAN 25 GPM FOR GREATER THAN 15 MINUTES Oconee (SC), 09/10/2025 At 1207 EDT on September 10, 2025, Oconee Nuclear Station Unit 1 declared an Unusual Event (SU5.1) due to identified reactor coolant system (RCS) leakage from Unit 1 for greater than 15 minutes. The […]

ENCLOSURE BUILDING BOUNDARY INOPERABLE Millstone (CT), 09/09/2025 "Entry into shutdown technical specification action statement due to an identified breach in ventilation ductwork. "At 2250 EDT on September 9, 2025, it was discovered that there was degraded manway sealant on the manway to fire […]

LOST GAUGE Euless, TX, 09/04/2025 "On September 4, 2025, the licensee reported that one of its technicians lost a Troxler 3440 moisture/density gauge. The gauge contains a 40 millicurie Am-241 source and a 10 millicurie Cs-137 source. The radiation safety officer (RSO) stated the gauge was being […]

STOLEN GAUGE Carlsbad, CA, 09/04/2025 "On September 4, 2025, at 0930 PDT, the radiation safety officer (RSO) notified the Radiologic Health Branch that a CPN moisture density gauge had been stolen from a locked trailer at their construction jobsite. The construction manager noticed the company's […]

LOST EXIT SIGN Orono, ME, 09/04/2025 At 0856 EDT, on September 4, 2025, the radiation safety officer (RSO) for the University of Maine Orono contacted the Maine RCP and reported that a tritium exit sign located underneath the UMaine Orono stadium bleachers was discovered to be missing. The […]