The following information was provided by the licensee via phone and email:
On July 3, 2024, at 0907 EDT, a reactor operator (RO) was in the process of commencing a routine startup. During the startup, the RO switched on the ventilation fans for less than 1 second with the key in the console.
[With the key in the console] the reactor did not meet the definition of 'reactor secured' and thus the confinement requirements of technical specification (TS) 3.4.2 were still required to be met. [Ventilation fans running in this condition violates the confinement requirements of TS 3.4.2.]
The RO notified the director of radiation facilities and logged the action. Throughout the duration of the event all control rods were fully inserted.
The director notified the NRC project manager.