Event Notification Report for June 10, 2024

EN Revision Imported Date: 6/10/2024

EN Revision Text: FITNESS FOR DUTY (FFD) REPORT

The following information was provided by the licensee via email and phone:

"On May 30, 2024, at 1200 CDT, South Texas Project (STP) FFD management identified from industry operating experience (OE) a programmatic failure, degradation, or discovered a vulnerability of the fitness for duty (FFD) program that may permit undetected drug or alcohol use or abuse by individuals within a protected area, or by individuals who are assigned to perform duties that require them to be subject to the FFD program. A review of the personnel in-processed and placed into the follow-up program by STP and external utilities since the implementation of the Illuminate software (07/31/2023) was completed. The issue affecting individuals placed into the follow-up program by external utilities was bound to in-processing of individuals [between] 02/22/2024 and 04/09/2024. One other individual processed in November of 2023, was also affected by this event. This event did not impact STP personnel that were either placed or had an existing record in the follow-up program. Compensatory measures were implemented and an extent of condition review was completed.

"This is a 24-hour reportable event per 10 CFR 26.719(b)(4)."

The NRC Resident Inspector has been notified.

AGREEMENT STATE REPORT - STOLEN TROXLER GAUGE

The following information was provided by the New York State Department of Health (NYSDOH) via email and phone:

"The NYSDOH received a phone call from the Radiation Safety Officer (RSO) at 0953 EDT on May 31, 2024, reporting a stolen portable moisture/density gauge.

"At approximately 0700 [on May 31, 2024,] an authorized user (AU) went to their vehicle and noticed that the back window was open and the vehicle was unlocked. The AU inspected the internal cab of the vehicle and did not notice anything missing and then drove to a job site. Upon arrival at the job site, the AU realized the gauge was stolen and called the RSO. The RSO instructed the AU to return to the the original location and called the police. The lock on the storage case was found broken, and the gauge was removed from the storage case."

Device information:
Device Make: Troxler
Device Model: 3430
Device Serial Number: 21150
Isotope: Am-241/Be (44 mCi) and Cs-137 (9 mCi)

NY Incident Number: 1488

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

NON-AGREEMENT STATE REPORT - LOST MOISTURE DENSITY GAUGE

The following information was provided by the licensee via phone:

On May 31, 2024, a moisture density gauge (InstroTek Xplorer, model: 3500, serial number: 5130, 10 mCi Cs-137, 40 mCi Am-241:Be) could not be found when an authorized user went to retrieve it from storage for calibration at their Dexter, MI office. The gauge was last inventoried on November 16, 2023, at the licensee's Ann Arbor office location and then relocated in January, 2024, to their Dexter location. The licensee inspected their former Ann Arbor location and verified that the space was empty. The licensee's Radiation Safety Officer is currently directing ongoing search efforts.

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

PART 21 REPORT - CHECK VALVE FAILS BENCH TEST

The following is a synopsis of information received via email:

Flowserve Corporation identified a defect with their 0.5 inch model 1878 piston check valve during bench testing. The piston check valve with adjustable cracking pressure received by Duke Energy Catawba Nuclear Station failed bench test performance for designed cracking pressure with an allowable range of 180 - 220 psig. The valve is used to provide overpressure protection of containment penetration piping due to thermal expansion of fluid trapped between the containment isolation valves when the valves are closed. The valves are required to crack open before the maximum 220 psig setpoint to perform this function. Corrective actions include revising Flowserve's assembly and test procedures for the 0.5 inch model 1878 piston check valve.

Affected known plant: Catawba Nuclear Station