Event Notification Report for September 30, 2021

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
09/29/2021 - 09/30/2021

EVENT NUMBERS
55483 55497
Agreement State
Event Number: 55483
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: VERSA INTEGRITY GROUP INC
Region: 4
City: Houston   State: TX
County:
License #: L 06669
Agreement: Y
Docket:
NRC Notified By: Karen Blanchard
HQ OPS Officer: Lloyd Desotell
Notification Date: 09/22/2021
Notification Time: 09:51 [ET]
Event Date: 09/21/2021
Event Time: 00:00 [CDT]
Last Update Date: 09/22/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
YOUNG, CALE (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
Event Text
EN Revision Imported Date: 9/30/2021

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
Event Number: 55497
Rep Org: Paragon Energy Solutions
Licensee: Paragon Energy Solutions
Region: 4
City: Fort Worth   State: TX
County:
License #:
Agreement: Y
Docket:
NRC Notified By: Tracy Bolt
HQ OPS Officer: Kerby Scales
Notification Date: 09/28/2021
Notification Time: 18:00 [ET]
Event Date: 09/03/2021
Event Time: 00:00 [CDT]
Last Update Date: 09/28/2021
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
SCHROEDER, DAN (R1DO)
MILLER, MARK (R2DO)
PART 21/50.55 REACTORS, - (EMAIL)
Event Text
EN Revision Imported Date: 9/30/2021

EN Revision Text: 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