Event Notification Report for January 24, 2022

EN Revision Imported Date: 1/24/2022

EN Revision Text: AGREEMENT STATE REPORT - DAMAGED TROXLER GAUGE

The following report was received by the Texas Department of State Health Services [the Agency]:

"On January 14, 2022, the Agency was notified by the licensee that a Troxler model 3430 was damaged at a temporary job site. The gauge contains a 40 millicurie americium - 241 source and an 8 millicurie cesium - 137 source. The gauge was run over by a Bobcat machine, damaging the gauge body and separating the cesium source rod and handle from the base of the device. The cesium source was in the fully shielded position at the time of impact. The cesium source was determined to be intact and still attached to the source rod. The technician contacted the radiation safety officer (RSO). The RSO visually inspected the device, returned the device to its transport container, and confirmed that the radiation profile had not changed from the manufacturer's specifications. The gauge was returned to the licensee's facility. The gauge will be sent to the manufacturer. No individual received a significant exposure due to this event. Additional information will be provided as it is received in accordance with SA-300."

Texas State Incident Number: I-9910

EN Revision Imported Date: 1/24/2022

EN Revision Text: AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following report was received from the California Department of Public Health via email:

"On Monday, January 17, 2022, the licensee's radiation safety officer reported the theft of a CPN MC-1DR (MD30406938) containing sealed sources of Cs-137 (10 mCi) and Am-241:Be (50 mCi), leak tested 4/2021. The theft occurred overnight between Friday and Saturday 1/14/2022 - 1/15/2022 at an authorized gauge user's (AU) residential home. The AU returned home urgently on Friday due to a family member's illness. The AU did chain the gauge case to the door inside the truck cab but failed to lock the truck before entering his home. The AU discovered that the gauge case was missing early Saturday morning while the truck was parked in the driveway of the home. The CPN nuclear gauge handle was locked to prevent operation, the gauge was locked in its transport case, and the transport case was chained to the door inside the truck cab, but the chain was cut and case/gauge was taken, apparently the only item stolen. The gauge and case had a company name and phone number label adhered to it in case of loss or theft. A police report was filed with the Corona police department (22-03047). The licensee will submit a lost/reward ad in the local paper/website and gather additional information for the follow up investigation."

California Event Number: 011722

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

INVALID ACTUATION OF SECONDARY CONTAINMENT RELAYS

The following information was provided by the licensee via email:

"This telephone notification is provided in accordance with 10 CFR 50.73(a)(1) to report an invalid actuation of secondary containment relays in accordance with 10 CFR 50.73(a)(2)(iv)(A).

"On November 29, 2021, the `B' Fuel Pool radiation monitor spiked high during restoration following the performance of the 0068 procedure `Spent Fuel Pool & Reactor Building Exhaust Plenum Monitor Calibration' due to cable to radiation monitor connector degradation from handling. This resulted in a Partial Primary Containment Group II isolation (gas systems), initiation of Standby Gas Treatment system, and isolation of the Reactor Building Ventilation system.

"All systems responded as designed to the actuation signal. Operations reset the Partial Primary Containment Group II isolation signal, shutdown Standby Gas Treatment System, and restored Reactor Building Ventilation system per procedures.

"At the time of the occurrence, the `A' Fuel Pool radiation monitor was reading normal at approximately 1.5 mr/hr. The `B' Fuel Pool radiation monitor spiked above the 50 mr/hr setpoint and continued to read erratically. Work was performed to clean and reconnect the connector and testing per 0068 procedure verified the condition was corrected. The `B' Fuel Pool radiation monitor returned to service.

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."