Gross electricity output totalled 88,684 MWh in October, Krsko said in a statement posted on its website on Tuesday.
A total of 4.4 cubic metres of low and intermediate-level radioactive waste was stored in October, Krsko said.
NEK shut down Krsko on October 5, after a leakage was detected in the primary system within the containment structure. The malfunction falls below the specified limit in technical regulations and poses no threat to the safety of employees, the public, or the environment, NEK said back then.
Krsko NPP, located in Slovenia near the border with Croatia, generates some 40% of Slovenia's electricity output. It operates a Westinghouse pressurised light water reactor of 2,000 MW thermal power capacity.