Event Notification Report for October 24, 2022

AGREEMENT STATE REPORT - DAMAGED TROXLER GAUGE

The following information was provided by the New Jersey Department of Environmental Protection via email:

"On 10/14/2022, Soils Engineering Services Inc (SESI) notified New Jersey Department of Environmental Protection (NJDEP) that a moisture/density gauge (Troxler model 3430, serial number 22602 containing 9 mCi Cs-137 and 44 mCiAm-241/Be) was run over by a pickup truck at a jobsite in Bayonne, New Jersey. The case was crushed. The source was shielded when the gauge was run over. The licensee surveyed the gauge to confirm the source was properly shielded prior to transporting it to the licensee's storage location in Parsippany, NJ. A sealed source leak test is pending. The cause and corrective actions were equipment operator error. There was no release."

NJ Event ID number: NJ-22-TBD

AGREEMENT STATE REPORT - STUCK OPEN SHUTTER

The following was received from Alabama Radiation Control via email:

"The licensed service provider arrived to address an issue with an Ohmart SHF2-0 source holder, serial number 8824GK with 500 millicuries of cesium-137 at assay date. The customer, Alabama River Cellulose, stated that the source holder was not functioning correctly (stuck open). The shutter issue was found during the site's lock-out/tag-out process for the process (unknown date/time). The service provider replaced the rotor on the device, and the device's shutter is now functioning as required."

Alabama Incident 22-19

AGREEMENT STATE REPORT - STUCK SOURCE

The following information was provided by the State of Ohio via email:

"On 10/12/2022, during routine maintenance and source exchange on an Elekta Flexitron HDR [High Dose Rate] unit the source became stuck in an unshielded position. The Elekta engineer immediately vacated the room and notified the medical physics staff and RSO [Radiation Safety Officer]. The area was secured by the RSO, and measurements taken outside of the secured area were at background. Licensee security was posted outside of the area to prevent entry until Elekta personnel could secure the source.

"Additional Elekta staff arrived and secured the source on 10/13/2022, and it was shipped back to the vendor on 10/14/2022."

Ohio Item number: OH220010

AGREEMENT STATE REPORT - GAUGE DISCOVERED IN SCRAP YARD

The following information was provided by the Arizona Department of Health Services (the Department) via email:

"The Department received notification on October 17, 2022, from American Metals Company in Chandler, Arizona that a load of scrap metal that was sent to be melted had set off the portal monitor at CMC Steel in Mesa, Arizona. The load was brought back to their facility and they were able to identify a gauge with partial markings and a reading of approximately 0.5 mR/hr. The Department responded to the facility and was able to identify the gauge as a Ronan Engineering Co., RLL-1 gauge, with a partial serial number of 204614. The gauge contains Cesium-137 with an activity of 0.45 mCi. The Department has requested additional information and continues to investigate the event.

"Additional information will be provided as it is received in accordance with SA-300."

Arizona Incident: 22-012

EN Revision Imported Date: 10/21/2022

EN Revision Text: SECONDARY CONTAINMENT INOPERABLE DURING SURVEILLANCE

The following information was provided by the licensee via email:

"At 0427 CDT on October 20, 2022, Grand Gulf Nuclear Station (GGNS) was in Mode 1 at 100 percent power when a failure of a draw down surveillance resulted in the loss of secondary containment. During the performance of the surveillance GGNS was unable to maintain secondary containment pressure, as required by Technical Specification Surveillance Requirement 3.6.4.1.4, greater than or equal to 0.266 inches of water vacuum for 1 hour at a flow rate of less than or equal to 4000cfm.

"The test was secured. Secondary containment was declared inoperable and Technical Specification 3.6.4.1 A.1 was entered at 0427 CDT. Secondary containment was restored to operable status at 0520 CDT by restoring the configuration to a previously known operable condition.

"This event is being reported as an event or condition that could have prevented the fulfillment of a safety function.

"The NRC Resident Inspector was notified."

TRANSPORT OF A POTENTIALLY CONTAMINATED PERSON OFFSITE

The following information was provided by the licensee via email:

"At 1446 EDT on October 20, 2022, an individual was transported offsite for treatment at an offsite medical facility. Due to the nature of the medical condition, the individual was not thoroughly surveyed prior to being transported offsite. Follow-up surveys performed by radiation protection technicians identified no contamination of the worker or of the ambulance and response personnel.

"This is an eight-hour notification, non-emergency for the transportation of a contaminated person offsite. This event is reportable in accordance with 10 CFR 50.72(b)(3)(xii).

"The NRC Resident Inspector has been notified."

ECCS INJECTION WHILE SHUTDOWN

The following information was provided by the licensee via fax:

"During Mode 5 Refueling operations, while attempting to establish flow through the Fuel Pool Cooling system filter demineralizers, an air operated valve to a radioactive waste tank failed to close automatically. This caused the Fuel Pool Cooling system to pump water from the Skimmer Surge Tanks (SST) to the radioactive liquid waste system. In response to the loss of inventory from the SSTs, the Control Room operating crew started Core Spray Pump A to restore normal operating level In the SST. This prevented the loss of the Fuel Pool Cooling/Alternate Decay Heat Removal system which was the only in service system meeting the safety function of decay heat removal. Core Spray Pump A was used for Injection for less than 3 minutes.

"This is reportable as a discharge of ECCS into the RCS in response to an event, but not part of a pre-planned sequence under 10 CFR 50.72(b)(2)(iv)(A) and actuation of a specified system under 10 CFR 50.72(b)(3)(Iv)(A)."

The resident inspector has been notified.

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

Licensee reported approximately 6000-7000 gallons of water was injected into the RCS. The stuck open air operated valve was closed. Proceeding with refueling outage operations.

STAGE FOUR AUTOMATIC DEPRESSURIZATION SYSTEM (ADS) INOPERABLE

The following information was provided by the licensee via email:

"At 0405 EDT on 10/23/2022, with [Vogtle] Unit 3 in Mode 6 and the reactor subcritical for greater than 28 hours, it was discovered that all three required flow paths for the stage four ADS were simultaneously inoperable; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). The diverse actuation system was operable for manual stage four ADS during this time period.

"At 0432 EDT on 10/23/2022, two of the three required flow paths were restored to operable status, which exited the reportable condition. All required flow paths were operable at 0447 EDT.

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

"The NRC Resident Inspector has been notified."

REACTOR COOLANT SYSTEM (RCS) PRESSURE BOUNDARY DEGRADATION

The following information was provided by the licensee via email:

"At 0830 PDT on 10/23/2022, during routine outage inspections on Unit 2, it was determined that the RCS Pressure Boundary did not meet ASME Section XI acceptance criteria on a 2-inch vacuum refill connection line. This event is being reported pursuant to 10 CFR 50.72(b)(3)(ii)(A).

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

"The NRC Resident Inspector has been notified."