AAA Advanced Accelerator Applications Program, USA ADS Accelerator Driven System
AHWR Advanced Heavy Water Reactor (Indian design) ALARA As Low As Reasonably Achievable
AVR Atom Versuchs Reaktor
BARC Bhabha Atomic Research Centre, India Be beryllium
bpd barrels per day
Bq Becquerel (amount of material that will produce 1 nuclear decay per second) Bq/kg Becqurel per kilogram
BWR Boiling Water Reactor
CANDU Canada Deuterium Uranium Reactor Ce cerium
CEA The French Atomic Energy Commission CGS cover gas system
CHTR Compact High Temperature Reactor CKTC Chalmers University, Sweden
CNEN The National Committee for Nuclear Energy, Italy CNRS Centre National de la Recherche Scientifique CO2 carbon-dioxide
D2O heavy water DNV Det Norske Veritas
EA Energy Amplifier EAU CO2 Emission Allowance Units
ECN Netherlands Energy Research Foundation, Petten, the Netherlands EdF Électricité de France
ENEN European Nuclear Education Network EPRI U.S. Electric Power Research Institute ESS The European Spallation Source
(project to design and construct a next generation facility for research with neutrons) ETWG Extended (actually European) Technical Working Group
EU The European Union
Euratom The European Atomic Energy Community F fluorine
FBR Fast Breeder Reactor Fe iron
FIMA per cent fissions in initial metal atoms (unit used for nuclear fuel burnup) GDP Gross Domestic Product
GFR Gas-Cooled Fast Reactor (Generation IV concept) GIF The Generation IV International Forum
GNEP Global Nuclear Energy Partnership GT-MHR Gas Turbine-Modular Helium Reactor GWe Giga Watt Electricity (1 000 000 kWe) H2O water
HBWR Halden Boiling Water Reactor
HEU High Enriched Uranium (> 20wt% U-235) HTGR High Temperature Gas Cooled Reactor HTR High Temperature Reactor
HWR Heavy Water Reactor
HYPER Hybrid Power Extraction Reactor project
(The Korea Atomic Energy Research Institute (KAERI) ADS system) IAEA International Atomic Energy Agency
ICT KFA Institute of Chemical Technology, KFA, Jülich, Germany IEA The International Energy Agency
IFE Institute for Energy Technology (Institutt for energiteknikk) at Kjeller and Halden, Norway IGCAR The Indira Gandhi Centre for Atomic Research, Kalpakkam, India
INES International Nuclear Event Scale
INFCE International Nuclear Fuel Cycle Evaluation
INPRO International Project on Innovative Nuclear Reactors and Fuel Cycles INSTN French National Institute for Nuclear Sciences and Technology IR Inferred Resources
ITER International Thermonuclear Experimental Reactor (Fusion)
JAEA The Japan Atomic Energy Agency (formerly Japan Atomic Energy Research Institute, JAERI and Japan Nuclear Cycle Development Institute, JNC)
KAPL Knolls Atomic Power Laboratory, USA keff effective neutron multiplication factor
KEK The High Energy Accelerator Research Organization, Japan Kr-85 krypton-85 (85Kr)
kWh kilo Watt hour
LBE Liquid Bismuth Eutectic
LEU Low Enriched Uranium (< 20wt% U-235)
LFR Lead-Cooled Fast Reactor (Generation IV concept) Li lithium
LINAC linear accelerator
LOCA Loss-Of-Coolant Accident
LOF Loss-Of-Flow (possible accident of an ADS system) LOHS Loss-Of-Heat-Sink (possible accident of an ADS system)
LPSC-lab Laboratoire de Physique Subatomique et de Cosmologie (in Grenoble) LWBR Light Water Breeder Reactor
LWR Light Water Reactor
MEGAPIE The Megawatt Pilot Experiment
MEU Medium Enriched Uranium (<20wt% U-235) MeV Mega electronvolt (unit of energy)
Mg magnesium MgO magnesium oxide micrometer 1 millionth of a meter (10-6 m) microseconds 1 millionth of a second (10-6 s)
MOX Mixed-Oxide (uranium and plutonium in mixed-oxide fuel) MPa mega pascal (1000 000 Pa = 106 Pa)
MSBR Molten Salt Breeder Reactor
MSR Molten Salt Reactor (Generation IV concept) MSRE Molten Salt Reactor Experiment
mSv milli Sievert (10-3 Sv or 1/1000 Sv) MTR Material Test Reactor
MWd/tHM Mega Watt days per tonne Heavy Metal (unit used for nuclear fuel burnup) MWth Mega Watt Thermal
n neutron
NaI Detector Sodium Iodide Detector (detector for measurement of uranium enrichment) Nb niobium
Nb2O5 niobium pentoxide
NCS Norwegian Continental Shelf Nd-147 neodymium-147 (147Nd) NEA OECD Nuclear Energy Agency
NEPTUNO Nuclear European Platform for Training and University Organizations NGL Natural Gas Liquids (a collective term for grades of liquid petroleum) NGU The Geological Survey of Norway
Np-239 neptunium-239 (239Np)
NPT Treaty on the Non-proliferation of Nuclear Weapons NRPA The Norwegian Radiation Protection Authority NTNU Norwegian university of Science and Technology
NVE Norwegian Water and Energy Directorate (Norges Vassdrags- og energidirektorat) OECD/NEA OECD Nuclear Energy Agency, Paris
OED The Norwegian Ministry of Petroleum and Energy ORNL Oak Ridge National Laboratory, USA
P phosphorus Pa-231 protactinium-231 (231Pa) Pa-233 protactinium-233 (233Pa) Pa-234 protactinium-234 (234Pa) Pb lead
Pb-Bi lead-bismuth
PHWR Pressurized Heavy Water Reactor (known as CANDU) Pm-149 promethium-149 (149Pm)
Po polonium
PRIS IAEA Power Reactor Information System PSI Paul Scherrer Institute, Switzerland Pu-238 plutonium-238 (238U)
Pu-239 plutonium-239 (239Pu) Pu-240 plutonium-240 (240Pu) Pu-241 plutonium-241 (241Pu) Pu-242 plutonium-242 (242Pu) PuF3 plutonium trifluoride PuO2 plutonium dioxide
PUREX plutonium uranium extraction prosess PyC pyrolytic carbon
R&D Research and Development Ra radium
Ra-226 radium-226 (226Ra)
RAR Reasonably Assured Resources RCN The Research Council of Norway REE Rare Earth Elements
Rn radon (Rn-222) Rn-220 thoron (a radon isotope) Ru-100 ruthenium-100 (100Ru).
RWTH Aachen Die Rheinisch-Westfälische Technische Hochschule Aachen SCK-CEN The Belgian Nuclear Research Centre
SCWR Supercritical-Water-Cooled Reactor (Generation IV concept) SFR Sodium-Cooled Fast Reactor (Generation IV concept) SGMP Sol-Gel Microsphere Pelletization
SiC silicon carbide
SINQ Swiss spallation neutron source at Paul Scherrer Institut (PSI), Switzerland SINTEF Selskapet for INdustriell og TEknisk Forskning
SiO2 Silica (Silicon Dioxide)
SKB Svensk Kärnbränslehantering AB
SKC The Swedish Centre for Nuclear Technology SKI The Nuclear Power Inspectorate in Sweden SNS The Spallation Neutron Source
(accelerator-based neutron source being built in Oak Ridge, Tennessee, USA) Sv Sievert
SWU Separative Work Unit (used in the enrichment process)
T1/2 half-life (time to reduse the amount of radioactive material to the half) TBP tributyl phosphate ThO2 thorium dioxide (thoria) THOREX thorium extraction process
THTR Thorium High Temperature Reactor Ti titanium
Tl-208 thallium-208 TMSR Thorium Molten Salt Reactor
TRU transuranic (elements with atomic numbers greater than uranium) TURF Thorium-Uranium Recycle Facility
TWh Tera Watt Hours (1 000 000 000 kWh)
TWhe Tera Watt Hours Electrisity (1 000 000 000 kWhe) U uranium
U-233 uranium-233 (233U), fissile isotope of uranium U-234 uranium-234 (234U)
U-235 uranium-235 (235U), fissile isotope of uranium (0.7 wt% in natural uranium) U-236 uranium-236 (236U)
U-238 uranium-238 (238U)
U3O8 Triuranium octaoxide (Yellow cake) (directly from the uranium mines)
(An oxide form of uranium that is the most common chemical form) found in nature.
UC2 uranium carbide
UCO uranium oxycarbide
UF6 Uranium hexafluoride (a compound used in the uranium enrichment process) UiB University of Bergen, Norway
UiO University of Oslo, Norway
UMB Norwegian University of Life Sciences at Ås, Norway UNENE University Network of Excellence in Nuclear Engineering UNFCCC United Nations Framework Convention on Climate Change UNIK University studies at Kjeller
UO2 uranium dioxide
UOIT University of Ontario Institute of Technology, Canada USGS The US Geological Survey
VHTR Very-High-Temperature Reactor (Generation IV concept) VVER Russian version of the Pressurized Water Reactor (PWR) WNU World Nuclear University
WNUCC WNU Coordinating Centre in London wt% weight percent
Xe-135 xenon-135 (135Xe) Y yttrium zircon zirconium silicate (ZrSiO4) Zr zirconium βeff delayed neutron fraction
$ reactivity unit, 1$ is the reactivity insertion that will make a critical reactor prompt critical