CNEN
| Acronym | Definition |
|---|---|
| CNEN | Comissão Nacional de Energia Nuclear (Portuguese: Nuclear Energy Commission) |
| CNEN | Centre National d'Équipement Nucléaire (French: National Center of Nuclear Equipment) |
| CNEN | Comitato Nazionale per l'Energia Nucleare (Italy) |
| CNEN | Combined Nomenclature Explanatory Notes (tariffs; EU) |
| CNEN | Comision Nacional de Energia Nuclear (Mexico) |