Watts Bar. Photo: TVA

One week after issuing a six-figure civil penalty to the Tennessee Valley Authority for violating Nuclear Regulatory Commission rules involving employee protection, the NRC has proposed penalties totaling more than $900,000 on TVA for a 2015 incident at the utility’s two-unit Watts Bar nuclear plant, located near Spring City, Tenn.

The NRC also has issued violations to two managers and a reactor operator for their roles in the incident.

The enforcement actions are the result of an NRC investigation—initiated in August 2016 and completed in May of last year—into events that occurred during and after the startup of Watts Bar-1 following a maintenance outage in November 2015.