Home2018 Treaties and Agreements ...Bulgaria (18-509) – Arrangement for the Exchange of Technical Information and Cooperation in Nuclear Safety Matters hide Bulgaria (18-509) – Arrangement for the Exchange of Technical Information and Cooperation in Nuclear Safety Matters TIAS Office of Treaty Affairs May 9, 2018 Nuclear Energy: Nuclear Safety Arrangement signed at Rockville and Sofia May 1and 9, 2018; entered into force May 9, 2018. With addenda and annex. Download attachment [2 MB] Tags Bulgaria Nuclear Energy Treaties