D
Acronyms
AC | alternating current |
AEPS | Advanced Electric Propulsion System |
ANL | Argonne National Laboratory |
ARDP | Advanced Reactor Demonstration Program |
B4C | boron carbide |
BeO | beryllium oxide |
cercer | ceramic-ceramic |
cermet | ceramic-metal |
DARPA | Defense Advanced Research Projects Agency |
DC | direct current |
DoD | Department of Defense |
DOE | Department of Energy |
DOE-NE | DOE Office of Nuclear Energy |
EP | electric propulsion |
FSP | Fission Surface Power program |
HALEU | high-assay, low-enriched uranium (i.e., uranium enriched to contain from between 5 and 20 percent uranium-235) |
HEU | highly enriched uranium (i.e., uranium enriched to contain from more than 20 percent uranium-235) |
Isp | specific impulse |
JIMO | Jupiter Icy Moons Orbiter |
kWe | kilowatt-electric |
LH2 | liquid hydrogen |
LiH | lithium hydride |
LOX | liquid oxygen |
M&S | modeling and simulation |
Mo | molybdenum |
MPD | magnetoplasmadynamic |
MWe | megawatt electric |
MWt | megawatt thermal |
NbC | niobium carbide |
NEP | nuclear electric propulsion |
NERVA | Nuclear Engine for Rocket Vehicle Application program |
NEXT-C | NASA’s Evolutionary Xenon Thruster–Commercial |
NextSTEP | Next Space Technologies for Exploration Partnerships |
NRIC | National Reactor Innovation Center |
NSTAR | NASA Solar Technology Application Readiness |
NTP | nuclear thermal propulsion |
PMAD | power management and distribution |
PMS | propellant management system |
PPU | power processing unit |
SEP | solar electric propulsion |
SNAP | Systems for Nuclear Auxiliary Power |
SNTP | Space Nuclear Thermal Propulsion program |
Ta | tantalum |
TFE | thermionic fuel element |
TOPAZ | Thermionic Operating Reactor Active Zone |
UC | uranium carbide |
UC2 | uranium dicarbide |
UCO | uranium oxycarbide |
UN | uranium nitride |
UO2 | uranium dioxide |
W | tungsten |
WUO2 | tungsten uranium dioxide |
ZPC | zero-power critical |
ZrC | zirconium carbide |
ZrH | zirconium hydride |