God tier
S
A
B
C
D
F tier
Created Mar 24, 2026
Use this reactor components tier list to rank your favorites from best to worst. Drag each item into S through D tiers, share your rankings, and compare with other users on TierBuddy.
horizontal steam generator
one layer containment
two layer containment
square fuel assembly
hexagonial fuel assembly
reactor vessel
barbotage tank
vertical steam generator
safety water injection tank
two loop primary system
four loop primary system
core catcher
In vessel retention
reheaters
main closing armature
reactor upper internals
pressurizer
heavy water coolant
light water coolant
gas coolant
sodium coolant
lead coolant
supercritical water coolant
SMR
fusion
tokamak
stelarator
triso fuel
mox fuel
thorium nuclear reaction
uran 235
uran 238
PWR
BWR
channel type reactor
positive void coefficient of reactivity
negative void coefficient of reactivity
thermal neutrons
fast neutrons
control rods
chemical shim
burnable absorber
natural enrichment
5% enrichment
21% enrichment
99.5% enrichment
delayed neutrons
xenon hole
samarium