Event Notification Report for June 06, 2023

EN Revision Imported Date: 6/6/2023

EN Revision Text: EMERGENCY EXHAUST INOPERABLE

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

"At 1127 CDT on 5/16/2023, during the reperformance of test procedure 'STS PE-006, Charcoal Adsorber In-Place Leak Test' due to a failure from the previous day, both trains of emergency exhaust were rendered inoperable due to incorrect performance of the procedure. Performers incorrectly de-energized the humidity control heating coil for the unit not under test, rendering it inoperable. This issue was identified and rectified at 1138 CDT on 5/16/2023, exiting the LCO [limiting condition of operation] for both trains inoperable at that time. There was no impact to the health and safety of the public."

* * * RETRACTION ON 6/5/2023 AT 1132 EDT FROM JASON KNUST TO HOWIE CROUCH * * *

"The initial failure of the STS PE-006 test was caused by a malfunction of the test equipment which initially injected excessive amounts of tracer gas and caused saturation of the charcoal. Using test equipment sourced from Callaway, and following guidance from the vendor, STS PE-006 test was successfully passed on 5/17/2023. No maintenance or intrusive testing was performed on the unit between initial test failure and satisfactory completion of the test. Because this train of emergency exhaust was not actually inoperable at the time the second train was rendered inoperable due to incorrect procedure performance, there was no loss of safety function. Therefore, this event notification is being retracted."

The licensee has notified the NRC Resident Inspector. Notified R4DO (Gepford).

FITNESS-FOR-DUTY REPORT

The following information was provided by the licensee via email:

"On June 2, 2023, a blind specimen provided to a laboratory did not analyze as expected. The specimen reported a false negative for amphetamines and a false positive for opiates.

"This event is being reported pursuant to 10 CFR 26.719(c)(2) and 10 CFR 26.719(c)(3).

"The NRC Resident Inspector has been notified."

PART 21 - RELAY CARD POTENTIAL DEFECT

The following information summary was provided by the licensee via email:

On April 5th, 2023, Duke Catawba Nuclear Station informed Paragon of a failure of a Trane External Auto/Stop and Emergency Stop relay card (Part Number: X13650728-06) in a chiller control system. Analysis of the failed relay card identified minor delamination and water intrusion of the microcontroller chip. Ongoing evaluation is expected to be completed by 7/15/23.

Potential plants affected: Nine Mile Point, Catawba, Riverbend, McGuire.

OFFSITE NOTIFICATION

The following information was provided by the licensee via email:

"At 1823 EDT, the shift manager was notified that one siren, part of the public notification system (siren number 10), spuriously activated for approximately one minute. Monroe County agencies were notified regarding the actuation. The cause of the actuation is being investigated and the ability for the siren to actuate has been removed until the cause is determined. There is no impact to the emergency planning zone.

"This event is a four-hour, non-emergency report for notification to other government agencies in accordance with 10 CFR 50.72(b)(2)(xi)."