Event Notification Report for March 29, 2024

AGREEMENT STATE REPORT - LOST GAUGE

The following information was provided by the Georgia Radioactive Material Program (the Department) via email:

"A call was made to the Department on March 20, 2024, to report a missing nuclear gauge from the radiation safety officer (RSO) with Atlantic Coast Consulting. Per the conversation, the RSO stated that the gauge was placed on the tailgate of the truck by the technician at the landfill work site. It was out of its storage case and not secured in the truck. The technician went on a lunch break, and, when he returned, the gauge was missing. The RSO stated that criminal activity is not suspected at this time. The licensee will be contacted for more detailed information. The Department will update this report as more information comes in."

Nuclear Gauge Information
Isotope: Cs-137/Am-241
Activity: 10mCi/50mCi
Manufacturer: CPN
Model: MC1DRP
Serial #: MD90805260

Georgia Incident No.: 80

* * * UPDATE ON 03/22/2024 AT 1209 EDT FROM KAAMILYA NAJEEULLAH TO IAN HOWARD * * *

The following update was provided by the Georgia Radioactive Material Program (the Department) via email:

"The official written report from Atlantic Coast Consulting, Inc. was received on March 22, 2024. [The] RSO informed the local police authority of the lost gauge and [told] them to be on the lookout. Upon receipt we will update this report as more information comes in."

Notified R1DO (Ford), NMSS Events (email), and ILTAB (email).

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

AGREEMENT STATE REPORT - DAMAGED MOISTURE DENSITY GAUGE

The following report was received by the California Department of Public Health , Radiation Health Branch (RHB) via email:

"CTE CAL, Inc. radiation safety officer (RSO) contacted RHB by email at 1634 [PDT] on March 20, 2024. A portable moisture density gauge containing radioactive material (Troxler Model 3430, Serial #T343 23828, Cs-137/Am-241:Be, 8mCi/40mCi) was run over by a smooth drum roller, on a construction site. The source rod and handle were damaged, and the source end of the rod broke off and was still on the ground. The accident site was cordoned off with barrier tape and the broken source rod and Cs-137 source were recovered by Pacific Nuclear Technology (PNT) and placed into a shielded recovery drum. The accident site was surveyed and no radiation above background was found. The damaged gauge and recovery drum were transported to PNT to be surveyed for radiation leakage. PNT surveyed the gauge, leak tested the sources, and determined that the sources were still intact and there was no leakage of radioactive material.

"RHB will continue to investigate the circumstances surrounding the accident."

California incident number: 032024

LOST TRITIUM AIMING POST LIGHTS

The following information was provided by the licensee:

At around 1700 CDT on March 21, 2024, the Detroit Army Arsenal's radiation safety officer (RSO) noticed a picture of two Army M58 Aiming Post Lights, which typically contain 5 Ci of tritium each, on a Reddit sub-group. The post indicated that the devices were a "going away gift" from the Army, and that the individual was no longer in the Army. The sealed sources appeared to be intact, but the RSO could not see the serial numbers.

The RSO plans on reporting this to his chain of command and to the Army Criminal Investigative Service.

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

AUTOMATIC ACTUATION OF REACTOR PROTECTION SYSTEM

The following information was provided by the licensee via email:

"At 2046 [CDT] on 3/27/24 with the unit 2 in Mode 5 at 0% power, an actuation of the Reactor Protection System occurred during testing of the scram discharge volume. The cause of the Reactor Protection System actuation was leakage of water into the scram discharge volume causing a high level condition while drains were isolated for testing. The Reactor Protection System automatically actuated as designed when the high scram discharge volume signal was received. All rods were previously fully inserted and the Control Rod Drive system was shutdown. No rod movement occurred due to the actuation.

"This event is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the Reactor Protection System.

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