Event Notification Report for February 21, 2022

EN Revision Imported Date: 3/22/2022

EN Revision Text: AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following report was received from the California Department of Public Health via email:

"On February 21, 2022, the alternate Radiation Safety Officer of G3 Quality, Inc. contacted the California Office of Emergency Services to report a stolen moisture density gauge. The gauge was a CPN model MC-3 S/N M370108596 (10 mCi Cs-137, 50 mCi Am:Be-241). The gauge was discovered stolen, along with other equipment, from a locked temporary storage container in a fenced (also locked) area of a construction site at the northwest corner of Interstate 10 and Interstate 15. The theft likely occurred sometime between Friday, February 19 and Monday, February 21. The storage container and fence locks were cut. A police report was given to the Ontario Police Department. The licensee's investigation into this event is ongoing and will be reviewed further by the California Department of Public Health."

California Event Number: 022122

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

EN Revision Imported Date: 4/15/2022

EN Revision Text: MANUAL REACTOR TRIP

The following information was provided by the licensee via fax or email:

"At 2207 [EST] on 2/21/2022 with Unit 2 in Mode 1 at 68 percent power, the reactor was manually tripped due to lowering water level in the 2A Steam Generator. The trip was not complex with all systems responding normally post-trip.

"Operators responded and stabilized the plant. Decay heat is being removed by discharging steam to the main condenser using the turbine bypass valves. Units 1 and 3 were not affected.

"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)(B).

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

* * * UPDATE ON 3/23/22 AT 1643 EDT FROM CHRIS MCDUFFIE TO TOM KENDZIA * * *

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

"On 2/21/2022, Unit 2 was in Mode 1 increasing reactor power following startup from a forced outage. At 2205 [EST] with Unit 2 at 68 percent power, a feedwater control valve failed to properly control feedwater flow to the 2A Steam Generator and the Integrated Control System initiated an automatic runback. At 2207 [EST], the reactor was manually tripped from 39 percent power due to lowering water level in the 2A Steam Generator. Immediately following the manual reactor trip, an actuation of the Emergency Feedwater System (EFW) occurred. The 2A and 2B Motor Driven Emergency Feedwater (MDEFW) pumps automatically started as designed when the 'low steam generator level' signal was received for the 2A Steam Generator. The trip was not complex with all systems responding normally post-trip. Operators responded and stabilized the plant. Decay heat was removed by discharging steam to the main condenser using the turbine bypass valves. Units 1 and 3 were not affected. Unit 2 was restarted on 2/27/2022 following repairs.

"Due to the Reactor Protection System actuation while critical, this event was reported on 2/22/2022 as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B). Following further evaluation, it was determined that a valid EFW actuation occurred, therefore this event is now also being reported as a late 8-hour non-emergency notification of a valid actuation of the EFW system in accordance with 10 CFR 50.72(b)(3)(iv)(A).

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

Notified the R2DO (Miller).

AGREEMENT STATE REPORT - LOST AND FOUND SOURCE

The following is a summary of a report received from Florida Bureau of Radiation Control (the Bureau) via email:

On February 24, 2022, at 0920 EST, the Vice-President of Imaging Physics at Landauer Medical Physics at the Cleveland Clinic Martin South Hospital called the Bureau to report a missing source. A 15 mCi Co-57 Med 3709 (s/n 2281-093, reference date February 1, 2022) source was ordered from Primestar to be delivered to the Nuclear Medicine (NM) Department. The order shipped January 12, 2022, at 1104 EST, and delivery was signed for, but the individual who signed for delivery did not remember seeing a radioactive box. The source was never received in NM. The South Hospital facility and all other NM departments checked for the source the week of the February 14 but were unable to locate it. The source was considered missing/lost by February 21, 2022.

The Bureau received an update on February 25, 2022, at 1647 EST. The Department Heads met to see how something could be received and not accounted for. The theory was that the person that signed for the package did not have the best handwriting, and the intraoffice label may have been misunderstood, sending it to nutrition instead of nuclear. A search of the nutrition storage shed at the South Hospital revealed the source. The shed is a secure, unoccupied space away from any staff, with limited access. This incident is considered closed.

Florida Incident Number: FL22-027