AEC -- Atomic Energy Commission
AIChE -- American Institute of Chemical Engineers
ANL -- Argonne National Laboratory
ANS -- American Nuclear Society
AP600 -- Westinghouse's Advanced Passive design for a 600 Mw power plant
ASHRAE -- American Society of Heating, Refrigeration, and Air-Conditioning Engineers
ASME -- American Society of Mechanical Engineers
ATWS -- Anticipated transient without scram
B&W -- Babcock & Wilcox
BNL -- Brookhaven National Laboratory
BWR -- Boiling water reactor
C-E -- Combustion Engineering
CCFL -- Countercurrent flow limitation
CCTF -- Cylindrical Core Test Facility, a PWR experiment facility in Japan
CHF -- Critical heat flux
COBRA-TF -- Coolant boiling in rod arrays, the two-fluid version
ECC -- Emergency core cooling or coolant
ECCS -- Emergency-core-cooling system
EIES -- Engineering and Industrial Experiment Station
EPRI -- Electric Power Research Institute
FLECHT -- Full-Length Emergency Cooling Heat Transfer, a series of PWR experiments performed by Westinghouse
FSAR -- Final Safety Analysis Report
GE -- General Electric
HTC -- Heat-transfer coefficient
HTFS -- Heat Transfer and Fluid Flow Service
INEL -- Idaho National Engineering Laboratory
LANL -- Los Alamos National Laboratory
LBLOCA -- Large-break loss-of-coolant accident
LMFBR -- Liquid-metal fast-breeder reactor
LOC -- Loss of coolant
LOCA -- Loss-of-coolant accident
LOCE -- Loss-of-coolant experiment
LOFT -- Loss-of-Fluid Test, a PWR experiment facility at INEL (now closed)
LU -- Lehigh University
LWR -- Light-water reactor
NPP -- Nuclear power plant
NRC -- US Nuclear Regulatory Commission
NRR -- Office of Nuclear Reactor Regulation (part of NRC)
NSAC -- Nuclear Safety Analysis Center
NTIS -- National Technical Information Service
ORNL -- Oak Ridge National Laboratory
PBF -- Power Burst Facility, a PWR fuel experiment at INEL
PNL -- Pacific Northwest Laboratory
PWR -- Pressurized water reactor
QA -- Quality assurance
RELAP5 -- Reactor Leak and Power Safety Excursion code, the fifth major version of the code
RHS -- Right-hand-side (of an equation)
RMS -- Root-mean-square averaging process
ROSA -- Rig of Safety Assessment, a series of LWR experiment facilities in Japan (currently modified to model AP600)
SBLOCA -- Small-break loss-of-coolant accident
SBWR -- General Electric's proposed passive Simplified BWR
SCTF -- Slab Core Test Facility, a PWR experiment facility in Japan
SETS -- Stability-enhancing two-step numerical technique
SI -- International system of units (metric)
THTF -- Thermal Hydraulic Test Facility, a PWR experiment at ORNL
TRAC -- Transient Reactor Analysis Code
UCSP -- Upper core-support plate
UPTF -- Upper Plenum Test Facility, a PWR experiment facility in Germany
Maintained by John Mahaffy : jhm@psu.edu