Event Notification Report for October 27, 2021

EN Revision Imported Date: 12/30/2021

EN Revision Text: AGREEMENT STATE - OCCUPATIONAL OVEREXPOSURE

The following was received from the Washington State Department of Health, Office of Radiation Protection, via email:

"Dosimetry results for the month of October 2021 for one employee showed ring extremity dosimeter readings of 77,156 millirads for one hand and 29,391 millirads for the other hand. The employee was interviewed and it appears that the radiation exposures were received during experiments involving yttrium-90 radiolabeling and injections into mice on October 25-27, 2021. The activity used during the experiments is not known at this time, but they had received a shipment of 40 milliCuries of yttrium-90 just before these experiments.

"This event is still being investigated by the licensee, but some [preliminary] calculations using the `beta activity to dose-rate' online calculator in Rad Pro Calculator suggest that the high dosimetry results could have been caused if the outside of the employee's ring extremity dosimeters were contaminated with as little as a few thousandths of a microCurie of yttrium-90. This possibility of contamination on the ring extremity dosimeters is also supported by the employee's low whole body dosimeter results for the month of October 2021, which were 0 millirems deep dose, 45 millirems lens dose, and 97 millirems shallow dose. The much lower dosimetry results of a coworker who was working alongside of the exposed employee also suggest that contamination on the ring extremity dosimeters of the exposed employee may have been the cause. The coworker's results were ring extremity dosimeter readings of 6025 millirads on one hand and 889 millirads on the other hand, and whole body dosimeter results of 0 millirems deep dose, 32 millirems lens dose, and 68 millirems shallow dose."

Washington Reference Document Number: WA-21-025

EN Revision Imported Date: 11/26/2021

EN Revision Text: AGREEMENT STATE REPORT - FOUND Ge-68 SOURCE

The following information was received via E-mail:

"The Illinois Emergency Management Agency (the Agency / IEMA) was notified on 10/27/21 by Siemens Medical Solutions that a PET phantom source had been identified at a scrap recycling facility in Gilberts, Illinois. IEMA staff should be on site at approximately 1500 CDT today (10/27/21) to impound the source and assess for contamination. Updates will be provided as they become available.

"The radiation safety officer for Siemens Medical Solutions contacted the Agency to advise that a cylindrical PET phantom source (Ge-68, typically around 4 mCi) had been identified at Elgin Recycling. The Elgin Recycling facility is located in Gilberts, Illinois. Reportedly, the facility identified a shielded container (pig) and surveyed it prior to processing. Their handheld meter identified radioactivity and they contacted the manufacturer listed on the container (Siemens). Siemens advised the facility to secure the source away from the public and await pickup (likely late next week). Rather than have an unlicensed facility responsible for security, shielding and accountability of a licensed source; IEMA staff will facilitate pickup today and transfer the source over to Siemens staff when they are available next week.

"Preliminary information indicates the source was returned from India and sent to Hegele Logistics in Wood Dale, Illinois. Hegele Logistics failed to identify the source and sent the material for recycling. Agency staff have previously responded to Hegele Logistics in August of 2019. Siemens is researching the shipment to determine if additional sources could be present.

"Safety Assessment: Agency staff will retrieve information on the source and actions taken by Elgin Recycling staff which will facilitate a characterization of exposures, if any. Assuming the source has not decayed at all (271 day half-life), a 4 mCi Ge-68 source would have an exposure rate of approximately 2.3 mR/hour at one meter. The sources are typically a sealed, cylindrical epoxy not lending itself to removable contamination. Updates to this assessment will be provided."

Illinois Item Number: IL210034

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: 11/26/2021

EN Revision Text: AUTOMATIC ACTUATION OF THE 1B EDG LOAD SEQUENCER ON BUS UNDERVOLTAGE CONDITION

"At 1429 EDT on October 27, 2021 with Unit 1 in Mode 6 at 0 percent power, the 1B Emergency Diesel Generator (EDG) Load Sequencer was actuated by a valid undervoltage condition on the 1B 4160V Essential Bus that occurred during 1B Sequencer calibration activities. Valid signals were sent to both the 1B EDG and Unit 1 Auxiliary Feedwater (CA) systems. Neither system automatically started as they were both removed from service for maintenance activities at the time.

"This event is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the 1B EDG and Unit 1 CA systems.

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