Úsek jaderné bezpečnosti spolupracuje nebo v minulosti spolupracovalo s následujícími mezinárodními organizacemi a uskupeními:
- Mezinárodní agentura pro atomovou energii ve Vídni (IAEA)
- IAEA Technical Support Organization Forum (TSOF)
- Small Modular Reactor Regulatory Forum (SMR RF)
- NEA/OECD Committee on the Safety of Nuclear Installations (CSNI)
- NEA/OECD CSNI (WGAMA, WGFS, WGIAGE)
- NEA/OECD CNRI (WGNT)
- ETSON (European TSO Network)
- GRS
- FIDES-II
- THEMIS-2
- ENSREG (European Nuclear Safety Regulators Group)
- EURATOM Programme Committee – Fission Configuration
- IAEA Nuclear Harmonization Safety Initiative (NHSI)
- JRC Clearinghouse
- NUWARD
- LDR-50
- Sitex Network (Sustainable Network for Independent Technical Expertise on radioactive waste management)
- NAWG (Natural Analogue Working Group)
etc.