On 1 January 2021, Bulgaria became the 34th member of the Organisation for Economic Co-operation and Development (OECD) Nuclear Energy Agency (NEA). On the occasion of this accession, a special ceremony was held online yesterday for welcoming Bulgaria to the NEA.
More information about event you can read here: https://www.oecd-nea.org/jcms/pl_53109/welcoming-bulgaria-to-the-nea
Official source: Nuclear Energy Agency