LOCA: Loss of Coolant Accident
LPHSW: Last Pass Heat Sink Weld
LWBR: Light Water Breeder Reactor
LWCHWR: Light Water Cooled Heavy Water Reactor
LWGR: Light Water-cooled Graphite Reactor
MDA: minimum detectable activity
MOX: Mixed OXyde fuel
MSA: Minimum Significant Activity
NAM: Nuclear Assessment Methodology
NCG: Nuclear Criteria Group
NDA: National Decommissioning Authority
NDE: Non-destructive Examination
NDS: Nuclear Data Sheets
NDS: Nuclear Detection System
NEA: Nuclear Energy Agency
NELS: Nuclear Effects Link Simulator
NERVA: Nuclear Engine for Rocket Vehicle Application
NEST: Nuclear Emergency Search Team
NH&S: Nuclear Hardening and Survivability
NIFS: National Institute for Fusion Science
NIM: Nuclear Instrumentation Module
NMR: Nuclear Magnetic Resonance
NNPT: Nuclear Non-Proliferation Treaty
NNSA: National Nuclear Security Administration
NOMIS: Nuclear Operations and Maintenance Information Service
NORM: Naturally Occurring Radioactive Material
NPP: Nuclear Power Plant
NPS: Nuclear Power Station
NRB: Nuclear Reactor/Brayton
NRC: Nuclear Regulatory Commission
NRDS: Nuclear Rocket Development Station
NS: nuclear shuttle
NSCCA: nuclear safety cross-check analysis
NSE: Nuclear Science Engineering
NSSS: Nuclear Steam Supply System
NTSC: Nuclear Technology Safety Center
NucFS: Nuclear Fusion Special Supplement
NucFu: Nuclear Fusion
NucIM: Nuclear Instruments and Methods
NucTe: Nuclear Technology