| AGR | Advanced gas-cooled reactor |
| BWR | Boiling water reactor |
| CO2 | Carbon dioxide |
| COVID-19 | Disease caused by the SARS-CoV-2 coronavirus |
| EU | European Union |
| FNR | Fast neutron reactor |
| FOAK | First-of-a-kind |
| g | gram |
| GCR | Gas-cooled reactor |
| GWe | Gigawatt (one billion watts of electric power) |
| HTGR | High temperature gas-cooled reactor |
| IAEA | International Atomic Energy Agency |
| IPCC | Intergovernmental Panel on Climate Change |
| LWGR | Light water-cooled graphite-moderated reactor |
| MoU | Memorandum of understanding |
| MWe | Megawatt (one million watts of electric power) |
| PHWR | Pressurized heavy water reactor |
| PRIS | Power Reactor Information System database (IAEA) |
| PWR | Pressurized water reactor |
| SMR | Small modular reactor |
| TWh | Terawatt hour (one trillion watt hours of electricity) |
| VVER | Vodo-Vodyanoi Energetichesky Reaktor (a PWR) |