Event Notification Report for December 29, 2022

EN Revision Imported Date: 12/29/2022

EN Revision Text: AGREEMENT STATE REPORT - STUCK SHUTTERS

The following was received from the state of South Carolina via email:

"The South Carolina Department of Health and Environmental Control was notified via telephone on 10/31/22 that three fixed gauging device shutters were stuck in the closed position. All three fixed gauging devices are Thermo Fisher Scientific Model 5197 gauging devices, serial numbers B7842, B7847, and B7841. The activity of each gauging device is 100 mCi of Cs-137. The licensee is reporting that all three fixed gauging devices are mounted 12-15 feet above accessible areas. No elevated exposure rates are being reported. Department inspectors will be dispatched to the facility. This event is still under investigation by the South Carolina Department of Health and Environmental Control."

South Carolina Event Number: To be assigned.

* * * UPDATE ON 11/22/2022 AT 1451 EST FROM ADAM GAUSE TO IAN HOWARD * * *
The following update was provided by the state of South Carolina via email:

"Department inspectors were dispatched to the facility and found the gauges as the licensee described. The gauges were expected to be repaired on 11/02/22. The licensee submitted a 30-day written report dated 11/11/22. The written report indicated the fixed gauging devices were repaired on 11/02/22. The licensee's corrective actions included repairing the fixed gauging devices and updating procedures to include examples of reporting requirements. This event is still under investigation by the South Carolina Department of Health and Environmental Control."

Notified R1DO (Carfang) and NMSS Events Notification email group.

* * * UPDATE ON 12/28/2022 AT 1547 EDT FROM ADAM GAUSE TO BRIAN LIN * * *
The following update was provided by the state of South Carolina via email:

"The licensee reported this event did not result in any personnel exposure to radiation or radioactive material. This event is considered closed."

Notified R1DO (Eve) and NMSS Events Notification email group.

EN Revision Imported Date: 12/29/2022

EN Revision Text: DAMAGED RADIOGRAPHIC CAMERA

The following information was provided by the licensee via email:

"At 0200 YST on December 06, 2022, the radiation safety supervisor (RSS) received a call that the technicians had a source which refused to retract to the safe and secured position. During the exposure, the camera fell approximately 4 feet to the ground and landed on the guide tube, which then didn't allow the source to be returned to a shielded position. The radiographers on site followed their procedure and secured their boundaries and notified the RSS. Two RSSs arrived on site at 0245 YST and were able to safely return the source back to locked position. At 1000 YST, a third RSS arrived on location to assist in retrieval.

"The source that required retrieval was Ir-192 at 80.6 curies in a Type B container/special form."

* * * UPDATE ON 12/27/2022 AT 0909 EDT FROM MARTY ANDERSON TO ERNEST WEST * * *
The following update was provided by the licensee via email:

The licensee reported the following doses received by personnel who assisted in the source retrieval:
RSS #1 Right hand 173 mR, Left hand 88 mR, Chest 98 mR, Electronic Dosimetry Reading 60 mR
RSS #2 Right hand 138 mR, Left hand 132 mR, Chest 74 mR, Electronic Dosimetry Reading 41 mR
RSS #3 Right hand 58 mR, Left hand 240 mR, Chest 40 mR, Electronic Dosimetry Reading 14 mR

Notified R4DO (Gepford) and NMSS Events Notification email group.

INVALID ACTUATION OF CONTAINMENT ISOLATION VALVES

The following information was provided by the licensee via email:

"This 60-day optional telephone notification is being made in lieu of an LER [Licensee Event Report] submittal as allowed by 10 CFR 50.73(a)(1). This notification is made pursuant to the reporting requirements specified in 10 CFR 50.73(a)(2)(iv)(A) for an invalid actuation of one of the systems listed in 10 CFR 50.73(a)(2)(iv)(B).

"At approximately 0906 Eastern Time (EST) on November 9, 2022, an invalid actuation of Group 6 Primary Containment Isolation Valves (PCIVs) (i.e., Containment Atmospheric Control/Monitoring and Post Accident Sampling isolation valves) occurred. In addition, per design, Reactor Building Ventilation isolated and Standby Gas Treatment started. It was determined that this condition was caused by faulty test equipment that was being used during preparation for the Main Stack Radiation Monitor High Radiation Response Time test. This test requires connecting a recording device to monitor for the test start signal on a Unit 2 relay associated with the Main Stack High Radiation signal. The recorder faulted which caused the associated fuse to blow and resulted in Unit 2 receiving a Main Stack High Radiation signal and Group 6 PCIV actuation. It was verified that the radiation monitor was not in trip electrically (i.e., there was no high radiation condition).

"The actuation was not initiated in response to actual plant conditions, it was not an intentional manual initiation, and there were no parameters satisfying the requirements for initiation of the system. Therefore, this event has been determined to be an invalid actuation.

"During this event the PCIVs functioned successfully, and the actuations were complete. This event did not result in any adverse impact to the health and safety of the public."

The NRC Resident Inspector was notified.