You are confused. The article talks about reactor construction time in
countries.E.g. Hinkley Point C is being built in the UK, that means it gets recorded in data about construction in the UK, even though it is designed by a French company, and owned by a French and Chinese company.
The same applies for reactors designed by Rosatom and built around the world. A VVER-1200 built in China may be a russian design, but the data is recorded as construction in China for obvious reasons.
> Sorry to break it to you, but the USSR dissolved over 30 years ago.
Yes, you're the one that was confused why Belarusian projects did not count as russian, and you ignored the Former USSR information in the article. If you would like to know why she aggregated the data that way and didn't break it out into before and after USSR dissolution, you should go and post a comment asking on her Substack.