Event Notification Report for January 09, 2023

AGREEMENT STATE REPORT - LOST EXIT SIGNS

The following information was provided by Kansas Radiation Control Program via email:

"Kansas Radiation Control Program was notified, at 1016 CST on December 30, 2022, that six tritium exit signs were disposed of inappropriately. A total of 17 tritium exit signs were removed from a church located in Topeka, Kansas, six signs were reported improperly disposed of with 11 remaining in the possession of the owner and later disposed of properly. The church had contracted with EMCOR to dispose of the signs and replace them with LED exit signs. The sub contractor, Mid-West Signs, reported they unintentionally disposed of six of the signs in the trash. Before this error was realized the trash was collected and the signs were determined unrecoverable. The signs were uninstalled on November 3, 2022; however it is unclear at this time when the signs might have been placed in the trash. This is an initial report and the incident is still open pending an investigation and management review."

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

AGREEMENT STATE REPORT - VEHICLE ACCIDENT

The following was received from the Texas Department of State Health Services (the Agency) via email:

"On December 31, 2022, the Agency was notified by the licensee that while returning an exposure device to the storage location, the driver of the licensee's vehicle hit a pedestrian who was in the road picking up some material. The radiographer stated the vehicle in front of them threw on its brakes and the radiographer swerved to miss them and hit the pedestrian. The police arrived at the scene and an ambulance was called. The individual did not want to leave in the ambulance but was convinced to do so. The extent of their injuries are not known. The licensee stated the exposure device and associate equipment were not affected by the event."

Texas Incident Number: 9979

AUTOMATIC REACTOR SCRAM

The following information was provided by the licensee via phone and email:

"At 1242 [EST] on 05 January 2023, with the Unit in Mode 1 at 99 percent power, the reactor automatically tripped on low Reactor Pressure Vessel level while restoring power to Digital Feedwater Control Stations when there was a perturbation to the level controls. The reason for perturbation is unknown at this time. The trip was not complex, with all systems responding normally post trip. Operations responded and stabilized the plant. High pressure core spray was manually initiated in accordance with site procedures. Reactor water level is being maintained via the Feedwater System. Decay heat is being removed by the Main Condenser.

"Due to the Reactor Protection System actuation while critical, this event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(A) and 10 CFR 50.72(b)(2)(iv)(B).

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."

SAFETY ITEM UNAVAILABLE

The following information was provided by the licensee via email:

"On 1/5/2023 at 1105 [MST], the control room received a call that a crane operator had operated the crane over a strap laying on the crane track. The initial inspection of the crane determined that a component of the crane had been damaged. The component was identified as a device to sweep debris from the crane rails and was not an [item relied on for safety] IROFS related component. At 0245 [MST], a Shift Manager inspected the crane and determined that the damaged component was part of IROFS27e [This IROFS is introduced for Separation Building Modules (SBM) for seismic, tornado, high wind, roof snow load, roof ponding, and site flooding due to local intense precipitation. Design features of the SBMs are to withstand loadings from these natural phenomena.] The component restrains the crane during a natural phenomena hazard. IROFS27e is an IROFS that is required to be available and reliable. An engineering analysis was initiated to determine if the crane would perform its safety function with the damaged component. Although the analysis is in progress, UUSA is reporting this event per 10 CFR 70. Appendix A (a)(4).

"There were no injured personnel and no release to the environment and the plant is in a safe configuration.

"This issue has been entered in UUSA's corrective action program as EV 159031."

EN Revision Imported Date: 1/10/2023

EN Revision Text: UNUSUAL EVENT DUE TO EXCESSIVE REACTOR COOLANT SYSTEM LEAKAGE

At 1402 EST Turkey Point Unit 3, while operating at 100 percent, declared an Unusual Event due to unidentified leakage greater than 10 gallons per minute for more than 15 minutes. The abnormal procedure for Reactor Coolant System leakage was entered. The plant remains at 100 percent power. The cause of the leakage is under investigation.

At 1446 EST it was verified that the leak had been isolated. The plant remains at 100 percent power.

Unit 4 was unaffected.

State and local authorities were notified by the licensee.

The NRC Resident Inspector has been notified.

Notified DHS SWO, FEMA Operations Center, CISA Central, FEMA NWC (email), DHS NRCC THD Dest (email), and DHS Nuclear SSA (email).


* * * UPDATE ON 12/08/22 AT 1621 (EST) FROM SZEMEI CHOI TO THOMAS HERRITY * * *

Turkey Point Unit 3 has isolated the leak. The Unusual Event was terminated at 1558 EST.

The NRC Resident Inspector has been notified.

Notified R2DO (Miller), NRR EO (Miller), and IR MOC (Crouch). Notified DHS SWO, FEMA Operations Center, CISA Central, FEMA NWC (email), DHS NRCC THD Dest (email), and DHS Nuclear SSA (email).

* * * RETRACTION FROM BRANDEN NATHE TO DONALD NORWOOD AT 1446 EST ON 1/9/2023 * * *

"Turkey Point Nuclear Unit 3 is retracting this notification based on the following additional information not available at the time of the notification, Following the event for unidentified RCS leakage on 12/8/22 at 1403 EST, additional information demonstrated that an RCS leak did not exist.

"A review of indications showed that the in-service seal water return filter D/P [Differential Pressure] rose from 1 psid to 6 psid with a corresponding rise in VCT [Volume Control Tank] level as would be seen with an increase in excess letdown flowrate. Additionally, the on-contact radiation dose rate from the excess letdown piping in the U3 Pipe and Valve Room was measured by RP [Radiation Personnel] to be significantly higher than normal with no other sources of elevated radiation levels noted.

"Following the closure of CV-3-387, RCS To Excess Letdown HX [Heat Exchanger] Control Valve, a nominal input/output flow balance was able to be restored. Containment parameters including pressure, temperature, sump level and radiation level did not change during the event. Due to the shared nature of piping between excess letdown and seal water return, a challenge to system integrity would not allow RCP [Reactor Coolant Pump] controlled bleed-off to remain in service with a normal flow balance which it has at all times subsequent to the event.

"Turkey Point Nuclear reported initially based on the available information at the time and to ensure timeliness with emergency declaration and reporting notification requirements. The NRC Resident Inspector has been notified."

Notified R2DO (Miller).