Event Notification Report for September 29, 2021

EN Revision Imported Date: 9/29/2021

EN Revision Text: NOTIFICATION OF ENVIRONMENTAL REPORT TO ANOTHER GOVERNMENT AGENCY

"At 1337 [EDT] on 9/8/2021, V.C. Summer reported the overflow of the Nuclear Operations Building Lift Station (LS-3) to the South Carolina Department of Health and Environmental Control. The lift station overflow was due to a broken discharge pipe from Pump 1 to the common discharge header. The overflow was contained in the valve vault, basin gravel, and the nearby concrete surface. None of the overflow reached any storm drains or waters of the state. This release did not exceed any NRC regulations or reporting criteria. This notification is being made solely as a four-hour, non-emergency notification for a Notification of Other Government Agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi).

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

* * * RETRACTION ON 09/28/2021 AT 1405 EDT FROM JUSTIN BOUKNIGHT TO KERBY SCALES * * *

"At 1712 EDT on 9/8/2021, V.C. Summer made Event Notification 55450 notifying the NRC of an environmental report to another government agency, in accordance with 10 CFR 50.72(b)(2)(xi). In the course of station response, it was determined that the lift station overflow did not exceed any federal, state or local reporting criteria or violate any permits. Following this investigation, the report to the South Carolina Department of Health and Environmental Control is considered a courtesy notification and the event does not meet reporting criteria under 10 CFR 50.72(b)(2)(xi).

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

Notified R2DO (Miller)

EN Revision Imported Date: 9/29/2021

EN Revision Text: AGREEMENT STATE REPORT - LOSS OF CONTROL OF RADIOACTIVE MATERIAL

The following report was received from the Utah Department of Environmental Quality, Division of Waste Management and Radiation Control (the Division) via email:

"On August 27, 2021, local heavy rain infiltrated the Merrill Engineering Building, causing flooding on the first and third floors. The first floor also included some radioactive materials labs. While stripping the labs on September 9, 2021, in preparation for repair, the contractor violated policy and failed to notify the lab owners before moving material from the lab. Included in the material removed from the lab was a safe containing 13 exempt calibration sources and one 0.006 milliCurie U-235 ceramic source. The safe was moved to an onsite trailer that was under control of the contractor and not the University. When the lab owner returned to the lab later in the day they immediately reported the sources missing. Investigation by licensee personnel lead them to where the sources were being stored. The sources were out of the licensee's exclusive control for 1 to 3 hours. The sources were re-secured and placed under the licensee's exclusive control closing the incident. The report was not determined to be reportable until the Division was able to conduct its on site investigation on September 20, 2021."

Utah Event Report ID Number: UT 210005

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: 9/29/2021

EN Revision Text: AGREEMENT STATE - UNABLE TO RETRACT SOURCE

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

"On September 21, 2021, the licensee notified the Agency that one of its radiography crews had been unable to retract the source into the fully locked and shielded position on a QSA 880D industrial radiography exposure device. The device contained an 86.2 curie iridium-192 source. They had approached the camera following an exposure and their hand-held survey meter's dose rates indicated the source was not fully shielded and they were unable to retract it into the locked position. They checked their barrier and notified their radiation safety officer. Two of the licensee's trained staff responded and retracted the source by disassembling the lock, attaching a new drive cable and manually pulling the source into position. No overexposures resulted from this event. The licensee will send the device to the manufacturer for inspection. An investigation into this event is ongoing. More information will be provided as it is obtained in accordance with SA-300."

Texas Incident No.: 9886

PART 21 REPORT - DEVIATION IN DC-DC CONVERTER RECTIFIERS IN INVERTER ASSEMBLIES

The following is a synopsis of information received from Paragon Energy Solutions via email:

On 9/3/2021, Paragon Energy Solutions determined that they did not have sufficient information to determine if the inverter assemblies would, or has, created a substantial safety hazard or would have created a technical specification safety limit violation as it relates to plant applications. Exelon (Limerick and Peach Bottom) were notified on 9/3/2021. Duke (Brunswick) was notified on 9/7/2021.

On 9/28/2021, Exelon Peach Bottom provided information indicating the failure of the unit in service could cause a substantial safety hazard in their application.

Quantity of Inverters: Brunswick (7), Limerick (6), Peach Bottom (4).

Component Description: Inverter Assembly 1000VA (Model CSI-K-B-Q9573-1), Nuclear Logistics part number: NLI-072034-CSI-K-5-A. The failed component is the DC-DC converter output rectifiers.

Nature of Defect: The deviation relates to failure of the installed Absopulse 1000VA inverter (Model CSI-K-B-Q9573-1). The extent of condition is currently limited to Absopulse inverters manufactured or repaired in 2015 and later. The root cause of the failure is currently under investigation. The failed component is the DC-DC converter output rectifiers.

Advice Related to Defect: Paragon recommends the identified plants evaluate their specific application and determine whether the condition described in this notice affects their design basis. If the licensee determines that it does, please contact Paragon to determine appropriate corrective action.


Tracy Bolt
Chief Nuclear Officer, CNO
817-284-0077
Paragon Energy Solutions, LLC
7410 Pebble Drive
Ft. Worth, TX 76118