| Abbreviation | Definition |
|---|---|
| NFC | Nuclear Fuel Complex |
| NFI | Nuclear Factor I |
| NFI | Nuclear Fuel Industries |
| NFIB | Nuclear Factor I B |
| NFIB | nuclear factor IB |
| NFSM | Nuclear Fuels and Structural Materials |
| NFY | nuclear factor Y |
| NGAT | Nuclear Grade Air Trap |
| NGNP | Next Generation Nuclear Plant |
| NGTM | Nuclear gauge testing manual |
| NHR | Nuclear Hormone Receptors |
| NHV | Nuclear Holocausto Vengeance |
| NIA | Nuclear Innovation Alliance |
| NIAG | Nuclear Interdiction Action Group |
| NIFA | Nuclear Institute for Food and Agriculture |
| NIGA | Nuclear Indirect Gamma Activity |
| NIM | Nuclear Instrument Modules |
| NIM | Nuclear Instruments and Methods |
| NIRS | Nuclear Information and Resource Service |
| NISA | Nuclear and |