Event Notification Report for October 20, 2021

EN Revision Imported Date: 10/20/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST GAS CHROMATOGRAPH SOURCE

The following is a synopsis of information received via email:

In early September, the radiation safety officer (RSO) sent a leak test kit to the Center for Applied Isotopes Department to smear test the gas chromatograph. He was informed that the gas chromatograph had been declared "surplus" on March 1, 2021. The Surplus Department decided it had no economic value and sent it to the state surplus scrap metal dealer. The device was shredded and pulverized with other scrap equipment from the university. It is believed the Ni-63 source was shredded with the equipment. The RSO did not find out that the source was missing until 6 months after it was shredded. Exposure risk is considered low because it would need to be ingested. The RSO has sent a letter to the Surplus department to remind their employees to contact the RSO before processing surplus equipment that may contain radioactive materials. The RSO has also reminded University researchers to check their equipment to make sure they have the appropriate signage.

Georgia incident number: 46

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: 10/20/2021

EN Revision Text: AGREEMENT STATE REPORT- LOST/STOLEN GAUGE

The following was received Texas Department of State Health Services, via email:

"On October 13, 2021, a licensee reported a moisture density gauge was stolen overnight. The gauge was taken from the back of a truck between 18:00 (EDT) on October 12, 2021 and 06:00 (CDT) October 13, 2021. The gauge was stored and locked within the carrying case but was not secured to the truck. The gauge is a Troxler model 3411 serial 11111 containing 8 mCi of Cs-137 with serial 47- 6513 and 40 mCi of Am-241 with serial 40-8612. Because the gauge was secured within the case it is not expected to provide any significant dose to anyone. The incident was reported to the local police department. More information will be provided per SA 300 as it is obtained."

Texas Incident Number: 9890




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: 10/20/2021

EN Revision Text: EMERGENCY DIESEL GENERATORS SIMULTANEOUSLY INOPERABLE

"At 1930 CDT on 10/17/2021, it was discovered both of the Unit 2 Emergency Diesel Generators were simultaneously INOPERABLE with a requirement to have one OPERABLE train; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10CFR 50.72(b)(3)(v). Offsite power was OPERABLE during this event.

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

The cause was corrected and both Emergency Diesel Generators are currently operable.

EN Revision Imported Date: 10/20/2021

EN Revision Text: PART 21 - PRESSURE REGULATOR VALVE FAILURE

The following is a summary of the report provided by Engine Systems Inc.:

The vendor supplied information to the NRC involving a defect and/or failure related to a pressure regulator valve installed on an emergency diesel generator at Brunswick Nuclear Power Plant. The valve did not properly regulate starting air pressure and allowed equalization of inlet pressure to outlet. Subsequent investigation by the vendor revealed a raised edge on the metal seating surface of the valve that caused the PTFE (Teflon) seat to tear. Equalization of starting air pressure is undesirable since it may inhibit operation of the downstream starting air solenoid valve, thus compromising the ability of the emergency diesel generator to start and support safety-related loads. The evaluation is complete. This Part 21 applies only to valves in the Brunswick Nuclear Power Plant.

Corrective Actions: Brunswick continues to monitor the outlet pressure from the regulator and verify the inlet and outlet pressures have not equalized. The vendor also recommends that existing regulators have an inspection performed on-site and at the vendor. The vendor will add inspections to the dedication package for new and refurbished pressure regulator valves to verify a smooth, rounded transition at the valve seat of the throttling sleeve.

Technical questions concerning this notification can be directed to Dan Roberts, Quality Manager, and John Kriesel, Engineering Manager.