Event Notification Report for March 26, 2021

EN Revision Imported Date: 3/26/2021

EN Revision Text: AGREEMENT STATE REPORT - LEAKING CALIBRATION SOURCE

The following information was received via e-mail:

"On 1/4/2021, a leak test was performed on an Isotope Products Laboratories Cs-137 sealed source vial, serial number 1074-19-20, used as a dose calibrator constancy source. The current calculated activity at the time of the leak test measured 147.49 microcuries from the reference date of 9/1/2004. The measured results of the leak test revealed an activity of 0.012 microcuries on 1/4/2021 at 1253 EST.

"The Cs-137 sealed source was promptly sealed within its lead container and firmly taped closed. This taped pig was then placed inside of several nitrile gloves, which were also generously taped closed, adorned with radioactive material stickers and the source was placed into the facility's radioactive material waste storage closet. The visible label includes the isotope, date of storage, current activity, and signature of the individual who stored it. The same documentation was also entered into the sealed source inventory. The RSO was then promptly notified of the event.

"The source leak test was conducted by Alliance Medical Physics."

Georgia Incident Number: 35


* * * UPDATE ON 3/25/21 AT 1111 EDT FROM SHATAVIA WALKER TO BETHANY CECERE * * *

The following information was received via e-mail:

"The immediate action taken for the leaking sealed source that was discovered on January 4, 2021 is as follows. The Cs-137 source was placed back into the lead pig shield and generously taped across where the lead pig closes as well as along the vertical axis. This was then marked with the date, isotope, current activity, and signature of the individual who sealed the source up. This was then encapsulated within nitrile gloves, and generously taped closed as well, with a radioactive label adhered to the outside that was marked with the isotope, current activity, date, and signature of the individual who sealed it.

"While this was taking place, the nuclear medicine technologist surveyed the area with the facility's Geiger counter to look for any errant contamination. He was instructed to survey anything that he would have touched that morning. He continued to survey himself (clothing and skin), the L-block, dose calibrator, dose calibrator dipper, MCA, trash cans, keyboard, and door handles. No contamination was found during his survey. This led me to believe that the leak was captured under the rim of the sealed sources cap where it meets the vial. The enveloped source was then placed in the rad waste closet until a vendor can be found for disposal by the facility. The rad waste cabinet measured. 0.2 mR/hr at face, and 0.1 mR/hr on either side of the cabinet. The back side faces the exterior of the building and is on the 2nd floor, therefore no readings were taken there. Currently, the facility is looking for a qualified disposal vendor that can safely remove the source. Until the sealed source is removed, the facility will continue to perform weekly surveys and wipes on the cabinet and document their findings. [The representative of Alliance Medical Physics] do[es] not anticipate any readings of [greater than or equal to] 2.0 mR/hr or 2200 DPM going forward, but [has] instructed the facility to notify the RSO and [Alliance Medical Physics] if they are found.

"The licensee explained shielding in place until the source can be removed.

"The licensee informed [GA Radioactive Material Program that] they have an arrangement to return the source to Eckert & Ziegler [the week of 3/15/21]. Shipping confirmation documents will be submitted. The licensee was advised to submit this information in writing."

Notified R1DO (Jackson) and NMSS Events Distribution (by email).

EN Revision Imported Date: 3/26/2021

EN Revision Text: AGREEMENT STATE REPORT - OVEREXPOSED WORKER

The following was reported by the state of Oklahoma via email:

"Globe X-ray Services, Inc., a radiography company, reported via phone this morning that a technician's dosimeter received a 5.3 rem dose. The dose was reported on the January dosimetry report and the licensee learned about it yesterday.

"The licensee is currently working with Landauer [badge supplier] to have the badge processed further, and is investigating the exposure.

"No additional information is known at this time, we will provide updates as additional information becomes available."

Oklahoma event Number: Not Assigned

* * * UPDATE ON MARCH 15, 2021, FROM ELIZABETH McCASKILL TO THOMAS HERRITY * * *

The following update was received form the state of Oklahoma via email:

"The badge reading was: 5132 mrem DDE, 5192 mrem LDE and 5192 mrem SDE.

"The RSO stated that they believe the Landauer dosimeter received the dose on January 22, 2021.

"The RSO interviewed the radiographer and it is believed that the Landauer dosimeter was in a jacket pocket in the shooting area during exposures.

"The alarming ratemeter and pocket dosimeter readings were not elevated for January 22, 2021.

"The licensee has contacted Landauer and are awaiting imaging results to determine if the exposure was static."

Notified R4DO (Kellar), and NMSS Events Notification via email.



* * * UPDATE ON MARCH 25, 2021 AT 11:42 EDT FROM ELIZABETH McCASKILL TO THOMAS HERRITY* * *

The following update was received form the state of Oklahoma via email:

"The licensee's investigation determined that the overexposure was to the badge, not to the individual. The licensee reported that the radiographer removed his jacket containing his dosimeter and laid the jacket in the area near where radiographs were being taken. He made approximately 12 exposures with a 56 curie Ir-192 source with the jacket in the area.

"The radiographer's direct reading dosimeter was not off scale and his alarming ratemeter did not alarm. The second radiographer on site also reported that the individual was using his survey meter. Results from Landauer were inconclusive regarding the exposure being static or dynamic. Based on the licensee's findings, they have requested that Landauer adjust the recorded dose to the individual as 114 [milliRem] for January 2021."

Notified R4DO (Werner), and NMSS Events Notification via email.

GAUGE STUCK SHUTTER

The following is a summary from a phone notification received from the licensee:

Maintenance technicians performing a lockout for maintenance manipulated a moisture gauge shutter handle and the handle broke, rendering the shutter stuck in the open position. The normal position for the shutter is open. The maintenance was canceled and the area around the gauge was secured. The gauge manufacture has been contacted and will be out to the site to help the licensee repair the gauge on 3/23/21. No exposure to personnel resulted from this event.

The gauge measures the moisture content in a bin containing metallurgical coke. The Berthold [TM] gauge contains a 300 mCi Am-241/Be source.

EN Revision Imported Date: 3/25/2021

EN Revision Text: NOTICE OF UNUSUAL EVENT DECLARED DUE TO FIRE ALARM IN CONTAINMENT

An Unusual Event was declared at Turkey Point Unit 4 Nuclear Generating Station at 2129 EDT on 03/24/2021 due to a Fire Alarm in Containment. The licensee was not able to validate the alarm within 15 minutes. Following containment entry there was not smoke or fire present.

At 2214 EDT, Turkey Point Unit 4 Nuclear Generating Station terminated the Unusual Event.

The cause of the spurious fire alarm is under investigation.

The licensee notified the NRC Resident Inspector.

Notified IRD MOC (Gott), NRR EO (Felts), R2DO (Miller), DHS SWO, FEMA Operations Center, CISA Central, FEMA NWC (email), DHS Nuclear SSA (email), and FEMA NRCC SASC (email).

MANUAL REACTOR TRIP DUE TO LOWERING CONDENSER VACUUM

"On March 25, 2021 at 0901 CDT, River Bend Station Unit 1 (RBS) was operating at 93 [percent] reactor power (limited by 100 [percent] recirculation flow) when condenser vacuum began to lower due to ARC-AOV1A, Steam Jet Air Ejector Suction Valve, going closed. At 0918 CDT, a manual reactor SCRAM was inserted at approximately 80 [percent] reactor power due to condenser vacuum continuing to lower. After the SCRAM, all systems responded as designed and condenser vacuum was restored by starting a mechanical vacuum pump. The cause of the Steam Jet Air Ejector Suction Valve closure is unknown at this time and being investigated. Currently RBS is stable, and pressure is being maintained using Turbine Bypass Valves. The Main Steam Isolation Valves remained opened throughout the event.

"This event is being reported under 10 CFR 50.72(b)(2)(iv)(B), as any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical and 10 CFR 50.72 (b)(3)(iv)(A) Specified System Actuation as result of expected post SCRAM level 3 isolations.

"No radiological releases have occurred due to this event from the unit.

"NRC Resident Inspector has been notified of this event."