Event Notification Report for November 03, 2020

AGREEMENT STATE REPORT - A SHUTTER STUCK OPEN ON A GAUGE

The following was received from the state of Tennessee via email:

"Licensee noticed on 11/2/2020 that a shutter was stuck open on a gauge. The position was confirmed on 11/3/2020. The licensee is in the process of reaching out to the manufacturer to determine the process for repair."

The gauge is an Ohmart model SHD with a 50 mCi Cs-137 source (S/N: M-0720).

Tennessee Incident Number: TN-20-165.

EN Revision Imported Date: 11/23/2020

EN Revision Text: BOTH TRAINS OF SALT WATER INOPERABLE

"At 0011 EST on 11/03/20, it was discovered that BOTH trains of salt water were simultaneously INOPERABLE. While in a planned [limiting condition for operation] LCO window with the 21 salt water train INOPERABLE for post-maintenance testing, debris intrusion in the 22 salt water header rendered the redundant salt water train INOPERABLE.

"Due to this INOPERABILITY, the system was in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v).

"One train of salt water was restored to operable at time 0026 EST.

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

This event did not affect Unit 1.

* * * RETRACTION ON 11/20/2020 AT 1218 EST FROM BRIAN FOVEAUX TO OSSY FONT * * *

"Following the eight hour 10 CFR 50.72 notification made on 11/03/2020 (EN 54979), further engineering analysis determined that 22 Saltwater subsystem flow remained at levels sufficient to fulfill its safety function based on the conditions existing at the time of the event. Despite flow in 22 Saltwater subsystem falling below the short term (four hour) minimum value for approximately 15 minutes, engineering analysis was able to determine the increased heat removal capacity associated with the lower bay temperatures was sufficient to offset the reduced heat removal capacity associated with the lower 22 Saltwater subsystem flow. This demonstrated that actual heat transfer to the saltwater subsystem was sufficient to ensure all safety functions were fulfilled during the event.

"Therefore, this event notification is being retracted as it is not reportable pursuant to 10 CFR 50.72(b)(3)(v)(A), (B) and (D).

"The NRC Resident has been informed."

Notified R1DO (Greives)

AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following is a summary of information received from the Colorado Department of Public Health and Environment:

The licensee reported that an InstroTek 3500 moisture/density gauge was stolen from the licensee's truck at 0730 MST on 11/3/20. The gauge was secured in the truck, and the truck was parked near the gauge user's house when the gauge was stolen. The police have been notified of this event.

Sealed Sources: 11 mCi of Cs-137 and 44 mCi of Am-241:Be

Event Report ID No.: CO 200063

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