

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| NRB | Nuclear Reactor/Brayton | In English | → Nuclear technology | 
| NRC | Nuclear Regulatory Commission (www.nrc.gov) | In English | → Central administration → Nuclear technology | 
| NRDS | Nuclear Rocket Development Station | In English | → Nuclear technology → Astronautics | 
| NS | Nuclear Shuttle | In English | → Nuclear technology → Astronautics | 
| NSCCA | Nuclear Safety Cross-Check Analysis | In English | → Nuclear technology | 
| NSE | Nuclear Science Engineering | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NTSC | Nuclear Technology Safety Center | In English | → Accidents, risks, safety → Nuclear technology | 
| NucFS | Nuclear Fusion Special Supplement | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NucFu | Nuclear Fusion | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NucIM | Nuclear Instruments and Methods | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NucTe | Nuclear Technology | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NucTF | Nuclear Technology Fusion | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NUDET | Nuclear Detonation | In English | → Nuclear technology → Military engineering | 
| NuEnD | Nuclear Engineering and Design | In English | → Serial publications, periodicals → Nuclei → Nuclear technology | 
| NUSS | NUclear Safety Standards | In English | → Standardization → Nuclear technology | 
| NV | Nuclear Vehicle | In English | → Nuclear technology → Vehicle engineering | 
| NWE | Nuclear Weapons Effect | In English | → Nuclear technology → Military engineering | 
| NWMP | Nuclear Weapons Monitor Plan | In English | → Nuclear technology → Military engineering | 
| OARME | Oxygen Atom Reaction Materials Experiment | In English | → Nuclear, atomic, and molecular physics → Nuclear technology | 
| OIEA | Organismo Internacional de Energía Atómica (www.iaea.org) = IAAE | Internacia Agentejo pri Atom-Energio | In Esperanto = IAEA | International Atomic Energy Agency | In English = AIEA | Agence Internationale de l'Énergie Atomique | In French = AIEA | Agenţia Internaţională pentru Energie Atomică | In Romanian = МААЕ | Международна агенция за атомна енергия | In Bulgarian = AIEA | Agència Internacional de l'Energia Atòmica | In Catalan = MAAE | Mezinárodní agentura pro atomovou energii | In Czech = IAEA | Det Internationale Atomenergiagentur | In Danish = IAEO | Internationale Atomenergieorganisation | In German = סבא"א | הסוכנות הבינלאומית לאנרגיה אטומית | In Hebrew = IAEA | International Atomenergie Agence | In Letzeburgesh = AIEA | Agenzia Internazionale per l'Energia Atomica | In Italian = IAEA | अंतर्राष्ट्रीय परमाणु ऊर्जा अधिकरण | In Hindi = MAAE | Меѓународна агенција за атомска енергија | In Macedonian = МАГАТЭ | Международное агентство по атомной энергии | In Russian = AIEA | Agência Internacional de Energia Atómica | In Portuguese = MAEA | Międzynarodowa Agencja Energii Atomowej | In Polish = МАГАТЕ | Міжнародне агентство з атомної енергії | In Ukrainian = UAEA | Uluslararası Atom Enerji Ajansı | In Turkish = IAEA | สำนักงานพลังงานปรมาณูระหว่างประเทศ | In Thai = EANA | Energia Atomikoaren Nazioarteko Agentzia | In Basque | In Spanish | → International relations → Energy economics → Nuclear technology | 
| OPEN | Organisation de Producteurs d'Énergie Nucléaire | In French | → Organizations and associations → Energy economics → Nuclear technology | 
| OPERA | Observatoire PErmanent de la RAdioactivité | In French | → Organizations and associations → Nuclear technology | 
| OPRI | Office de Protection contre les Rayonnements Ionisants (www.opri.fr) | In French | → Organizations and associations → Nuclear technology | 
| ORM | Operational Reactivity Margin | In English | → 53912 → Nuclear technology | 
| OSART | Operational Safety Assessment Review Team | In English | → Nuclear technology | 
| PAI | Produit d'Activation des Impuretés (de la céramique) | In French | → Chemistry → Nuclear technology | 
| PAS | Produit d'Activation des Structures | In French | → Chemistry → Nuclear technology | 
| PHWR | Pressure Vessel Heavy Water Reactor | In English | → Nuclear technology | 
| PLAGE | Plattform gegen Atomgefahren | In German | → Organizations and associations → Nuclear technology → Military engineering | 
| PMC | Plutonia-Molybdenum Cermet | In English | → Energy economics → Nuclear technology | 
| PNB | Pôle Nucléaire Bourguignon | In French | → Nuclear technology | 
| PPCF | Plasma Physics and Controlled Fusion (www.iop.org/EJ/journal/PPCF) | In English | → Serial publications, periodicals → Plasma physics → Nuclear technology | 
| PPE | Programme de Principe d'Essais | In French | → Nuclear technology | 
| PSI | Programme de Surveillance de l'Irradiation | In French | → Nuclear technology | 
| PTR | Projektträger Reaktorsicherheitsforschung | In German | → Nuclear technology | 
| PUCE | Programme pour l'Utilisation des Composants Électroniques | In French | → 621038 | 
| PWR | Pressurized Water Reactor = REP | Réacteur à Eau Pressurisée | In French = DWR | Druckwasserreaktor | In German | In English | → Nuclear technology | 
| RBE | Relative Biological Effectiveness | In English | → Pharmacology, toxicology → Nuclear technology | 
| RCC-C | Règles de Conception et de Construction des Assemblages de Combustible des Centrales Nucléaires | In French | → Nuclear technology | 
| RCC-E | Règles de Conception et de Construction des Matériels Électriques des Centrales Nucléaires | In French | → Nuclear technology | 
| RCC-G | Règles de Conception et de Construction du Génie Civil des Îlots Nucléaires REP | In French | → Nuclear technology | 
| RCC-M | Règles de Conception et de Construction des Matériels Mécaniques des Îlots Nucléaires REP | In French | → Nuclear technology | 
| RCC-MR | Règles de Conception et de Construction des Matériels Mécaniques des Îlots Nucléaires RNR | In French | → Nuclear technology | 
| RCD | Réacteur Complétement Déchargé | In French | → Nuclear technology | 
| REB | Réacteur à Eau Bouillante = BWR | Boiling Water Reactor | In English = SWR | Siedewasserreaktor | In German | In French | → Nuclear technology | 
| REP | Réacteur à Eau Pressurisée = PWR, DWR (look above) | In French | → Nuclear technology | 
| RESC | Réacteur à Eau SuperCritique | In French | → Nuclear technology | 
| RFS | Règle Fondamentale de Sûreté | In French | → Nuclear technology | 
| RGN | Revue Générale Nucléaire | In French | → Serial publications, periodicals → Nuclear, atomic, and molecular physics → Nuclear technology | 
| RMN | Résonance Magnétique Nucléaire = NMR | Nuclear Magnetic Resonance | In English = RMN | Ressonància Magnètica Nuclear | In Catalan = RMN | Risonanza Magnetica Nucleare | In Italian = תמ"ג | תהודה מגנטית גרעינית | In Hebrew = ЯМР | Я́дерного магни́тного резона́нса | In Russian = НМР | Нуклеарна магнетна резонанција | In Serbian | In French | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology | 
| RMN | Ressonància Magnètica Nuclear = NMR, תמ"ג, ЯМР, НМР (look above) | In Catalan | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology | 
| RMN | Risonanza Magnetica Nucleare = NMR, תמ"ג, ЯМР, НМР (look above) | In Italian | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology | 
| RNEP | Robust Nuclear Earth Penetrator | In English | → Nuclear technology → Military engineering | 
| RNR | Réacteur à Neutrons Rapides | In French | → Nuclear technology | 
| RNR | éacteur Nucléaire Rapide | In French | → Nuclear technology | 
| RNS | Reusable Nuclear Stage | In English | → Nuclear technology | 
| RPS | Rapport Préliminaire de Sûreté | In French | → Nuclear technology | 
| RSE-M | Règles de Surveillance en Exploitation des Matériels Mécaniques des Îlots Nucléaires REP | In French | → Nuclear technology | 
| RTG | Radioisotope Thermal Generator | In English | → Energy economics → Nuclear technology | 
| RTG | Radioiziotopa Termoelektra Generatoro | In Esperanto | → Nuclear technology | 
| SANTIAGO | Sûreté des Assemblages Nucléaires TIers ou Alternatifs pour les Gestions d'Origine | In French | → Nuclear technology | 
| SENA | Société d’Énergie Nucléaire des Ardennes | In French | → Organizations and associations → Nuclear technology | 
| SEPTEN | Service Études et Projets Thermiques Et Nucléaires | In French | → Energy economics → Nuclear technology | 
| SFEN | Société Française d'Énergie Nucléaire (www.sfen.org) | In French | → Organizations and associations → Energy economics → Nuclear technology → France | 
| SGHWR | Steam Generating Heavy Water Reactor | In English | → Nuclear technology | 
| SINETICS | SImulation NEutronique, Technique de l'Information et Calcul Scientifique | In French | → Nuclear technology | 
| SNA | Sous-marin Nucléraire d'Attaque | In French | → Nuclear technology → Military engineering | 
| SNAP | Space Nuclear Auxiliary Power | In English | → Nuclear technology → Astronautics | 
| SNC | Société Nucléaire Canadienne (www.cns-snc.ca) | In French | → Organizations and associations → Nuclear, atomic, and molecular physics → Nuclear technology → Canada | 
| SNLE | Sous-marin Nucléaire Lanceur d'Engins | In French | → Nuclear technology → Military engineering | 
| SNPO | Space Nuclear Propulsion Office | In English | → Nuclear technology → Astronautics | 
| SNSO | Space Nuclear Systems Office | In English | → Nuclear technology → Astronautics | 
| SPN | Section Permanente Nucléaire | In French | → Organizations and associations → Nuclear technology | 
| STMI | Société des Techniques en Milieu Ionisant (www.stmi.fr) | In French | → Nuclear technology → France | 
| STYLO | Simulation du comporTement du craYon combustibLe sous irradiatiOn | In French | → Nuclear technology | 
| SWR | Siedewasserreaktor = REB, BWR (look above) | In German | → Nuclear technology | 
| SYSFAC | SYstème de Surveillance de la FAtigue de la Chaudière | In French | → Software → Nuclear technology | 
| TEA | Tranche en Arrêt | In French | → Nuclear technology | 
| TEF | Tranche en Fonctionnement | In French | → Nuclear technology | 
| TEM | Tranche en Marche | In French | → Nuclear technology | 
| TFA | Très Faible Activité | In French | → Nuclear technology | 
| TICE | Traité d'Interdiction Complète des Essais nucléaires | In French | → International relations → Military engineering → Nuclear technology | 
| tML | Tonne de Métal Lourd | In French | → Metallurgy → Nuclear technology | 
| TNP | Traité de Non Prolifération des armes nucléaires | In French | → International relations → Military engineering → Nuclear technology | 
| UAEA | Uluslararası Atom Enerji Ajansı (www.iaea.org) = OIEA, IAAE, IAEA, AIEA, МААЕ, MAAE, IAEO, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, EANA (look above) | In Turkish | → International relations → Energy economics → Nuclear technology | 
| UKAEA | United Kingdom Atomic Energy Agency | In English | → Public administration, government → Energy economics → Nuclear technology | 
| UNGG | Uranium Naturel Graphite Gaz | In French | → Nuclear technology | 
| URE | Uranium de Retraitement Enrichi | In French | → Nuclear technology | 
| URE | Uranium de Traitement Enrichi | In French | → Nuclear technology | 
| URT | Uranium de Retraitement | In French | → Nuclear technology | 
| URT | Uranium de Traitement | In French | → Nuclear technology | 
| VC | Visite Complète | In French | → Nuclear technology | 
| VCI | Visite Complète Initiale | In French | → Nuclear technology | 
| VD | Visite Décennale | In French | → Nuclear technology | 
| VLLW | Very Low Level Waste | In English | → Nuclear technology | 
| VVER | Vodo-vodní energetický reaktor = WWER | Wodo-Wodianoj Eniergieticzeskij Rieaktor | In Polish = WWER | Wasser-Wasser-Energie-Reaktor | In German = ВВЕР | Водо-Водяной Энергетический Реак | In Russian | In Czech | → Nuclear technology | 
| WANO | World Association of Nuclear Operators | In English | → Associations → Nuclear technology | 
| WWER | Wodo-Wodianoj Eniergieticzeskij Rieaktor = VVER, ВВЕР (look above) | In Polish | → Nuclear technology | 
| WWER | Wasser-Wasser-Energie-Reaktor = VVER, ВВЕР (look above) | In German | → Nuclear technology | 
| ВВЕР | Водо-Водяной Энергетический Реак = VVER, WWER (look above) | In Russian | → Nuclear technology | 
| МААЕ | Международна агенция за атомна енергия (www.iaea.org) = OIEA, IAAE, IAEA, AIEA, MAAE, IAEO, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) | In Bulgarian | → International relations → Energy economics → Nuclear technology | 
| МАГАТЕ | Міжнародне агентство з атомної енергії (www.iaea.org) = OIEA, IAAE, IAEA, AIEA, МААЕ, MAAE, IAEO, סבא"א, МАГАТЭ, MAEA, UAEA, EANA (look above) | In Ukrainian | → International relations → Energy economics → Nuclear technology | 
| МАГАТЭ | Международное агентство по атомной энергии (www.iaea.org) = OIEA, IAAE, IAEA, AIEA, МААЕ, MAAE, IAEO, סבא"א, MAEA, МАГАТЕ, UAEA, EANA (look above) | In Russian | → International relations → Energy economics → Nuclear technology | 
| НМР | Нуклеарна магнетна резонанција = RMN, NMR, תמ"ג, ЯМР (look above) | In Serbian | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology | 
| РБМК | Реактор Большой Мощности Канальный | In Russian | → Nuclear technology → 53912 | 
| ЯМР | Я́дерного магни́тного резона́нса = RMN, NMR, תמ"ג, НМР (look above) | In Russian | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology | 
| סבא"א | הסוכנות הבינלאומית לאנרגיה אטומית (www.iaea.org) = OIEA, IAAE, IAEA, AIEA, МААЕ, MAAE, IAEO, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) | In Hebrew | → International relations → Energy economics → Nuclear technology | 
| תמ"ג | תהודה מגנטית גרעינית = RMN, NMR, תמ"ג, ЯМР, НМР (look above) | In Hebrew | → Medicine → Nuclear, atomic, and molecular physics → Nuclear technology |