SEM : Scanning electron microscope
RAI : Request for additional information
PFBR : Prototype fast breeder reactor
OIL : Operational intervention levels
NEEP : Nuclear Engineering and Engineering Physics
AEC : Assistant Emergency Controller
CARB : Corrective Action Review Board
VHTR : Very-high-temperature reactor
SST : Shear stress transport
RWP: Radiation work permit
PUREX: Plutonium uranium reduction extraction