At least in Eastern Europe, most nuclear facilities were built near the borders with other countries, and in this case Belarus was affected much more than Ukraine[1].

Belarus itself is currently building its first nuclear power plant just 45 km (28 mi) away from the capital of Lithuania[1].

[1] https://en.wikipedia.org/wiki/Chernobyl_Exclusion_Zone#/medi...

[2] https://en.wikipedia.org/wiki/Belarusian_nuclear_power_plant