Event Notification Report for August 26, 2021

EN Revision Imported Date: 8/26/2021

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

The following information was received from the state of Texas (the Agency) via email:

"On August 18, 2021, the Agency was notified by the licensee that a Troxler model 3430 moisture density gauge was stolen from the back of an employee's truck. The employee's truck was parked at their apartment overnight. The licensee stated that the apartment complex security camera system showed the theft occurred at about 0149 CDT on August 18, 2021. The gauge contains a 40 milliCurie Americium - 241 source and an 8 milliCurie Cesium - 137 source. The licensee stated the gauge was locked using chains in the back of the pickup truck. The licensee reported local law enforcement has been notified of the theft. The Agency requested additional information from the licensee. Additional information will be provided in accordance with SA-300."

TX Incident #: 9877

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: 8/26/2021

EN Revision Text: AGREEMENT STATE REPORT - STUCK OPEN GAUGE SHUTTER

The following information was obtained from the state of Iowa via email:

"On August 18, 2021, at approximately 1000 CDT, the DAV-015 #4 shutter was reported to be stuck in the open position. A survey meter measured a background level of 0.02 mR/hr outside of the gauge house, and 0.05 mR/hr inside the gauge house at that time. Locks were changed to the gauge house to prevent entry. The service company, SenTek, was notified and requested to provide service. They are expected to arrive on August 19, 2021, to provide service and repairs. This event will be updated after the service company determines the cause of the failure and the licensee provides a corrective action plan."

The gauge was manufactured by Isotope Measuring Systems, Inc., model number 5221-02, serial number 2332-2336L, and contains 5 Curies of Am-241.

NMED Number: IA210003

EN Revision Imported Date: 8/26/2021

EN Revision Text: APPENDIX R HOT SHORT UNANALYZED CONDITION

"During an extent of condition review of DC control circuits, it was identified there are additional unprotected DC control circuits which are routed between separate Appendix R fire areas. A postulated fire in one area can cause a short circuit and potentially result in secondary fires or cable fires in other fire areas where the cables are routed. The secondary fires or cable failures degrade the degree of separation for redundant safe shutdown trains and are outside the assumptions of the 10 CFR 50 Appendix R Safe Shutdown Analysis. This condition is reportable in accordance with 10 CFR 50.72(b)(3)(ii)(B).

"Compensatory actions for affected fire areas have been implemented. Design modifications in the affected control circuits are being developed and will be scheduled to correct this condition."

CONTAMINATED ITEMS DISCOVERED AT WAREHOUSE

The following was received from the Nuclear Fuels Services, Inc. (NFS) Nuclear Safety & Licensing Manager via email:

"This event was reported previously as an amendment to EN55161 on March 31, 2021 The purpose of this report is to establish a new Event Number containing only the transportation related notification and to ensure severance from of all security related information. A 30-day written report was provided to the NRC on April 28, 2021 (Reference NFS Document Number 21G-21-0076). The 30-day written report will be revised to redact all security related information and resubmitted following this telephone notification.

"On March 30, 2021, NFS identified legacy equipment that contained contaminated items at an NFS owned offsite warehouse. This equipment was transported on public roads to this facility during/prior to 2016.

"There were no actual or potential safety consequences to workers, the public, or the environment.

"The licensee notified the NRC Resident Inspector 3/31/2021 at 1350 hours EDT."

NFS Event (PIRCS) Number: 83261