ICE, SNOW and WATR all slow down neutrons, so if you need a coolant and a moderator you can use just ICE, if you make it with FRZZ it shouldn't melt too easily.

I guess it would be more consistent if they all also slowed down neutrons, though...

@Potbelly (View Post)

Use Lua:

tpt.el.frzw.properties=bit.bor(tpt.el.frzw.properties,elem.PROP_NEUTPASS)
tpt.el.frzz.properties=bit.bor(tpt.el.frzz.properties,elem.PROP_NEUTPASS)
tpt.el.wtrv.properties=bit.bor(tpt.el.wtrv.properties,elem.PROP_NEUTPASS)
tpt.el.rime.properties=bit.bor(tpt.el.rime.properties,elem.PROP_NEUTPASS)
tpt.el.fog.properties=bit.bor(tpt.el.fog.properties,elem.PROP_NEUTPASS)