Slovakia Starts Fuel Loading at Mochovce Unit 4 After 39-Year Build
Updated
Updated · Bloomberg · Jul 3
Slovakia Starts Fuel Loading at Mochovce Unit 4 After 39-Year Build
2 articles · Updated · Bloomberg · Jul 3
Summary
Fuel loading has begun at Mochovce’s fourth and final reactor unit, putting Slovakia on track for commercial startup by the end of the summer.
The unit reaches this stage 39 years after construction began, making it the industry’s second-longest build after delays tied to funding problems, tighter safety rules and faulty workmanship.
Once Unit 4 starts producing power, nuclear is set to supply 77% of Slovakia’s electricity generation, a higher share than France’s.
Slovakia is already preparing to cut reliance on Russian fuel in the Soviet-designed reactors from 2028 with Westinghouse and Framatome, while planning another reactor at Jaslovske Bohunice for export-oriented capacity.
After a 39-year, €6.7B project, how will Slovaks benefit from nuclear power designated for export?
With 77% of its power from nuclear, is Slovakia swapping Russian dependency for a high-risk reliance on a single technology?
Mochovce Unit 4’s Completion Propels Slovakia to World’s Highest Nuclear Share and Net Power Exporter Status
Overview
In June 2026, Mochovce Nuclear Power Plant’s Unit 4 began loading nuclear fuel, marking the last major step before connecting to the grid and starting commercial operation. After fuel loading, the plant will conduct a series of active reactor tests, each requiring regulatory approval, followed by a gradual power increase and a final 144-hour demonstration at full capacity. Once fully operational, Unit 4 is expected to provide about 13% of Slovakia’s electricity, significantly boosting the country’s energy independence and making Slovakia a net electricity exporter. This milestone highlights Slovakia’s commitment to nuclear energy and regional energy security.