This part is from KSP Interstellar Extended
cost:
500000
mass:
20
category:
Engine
TechRequired:
hidden
engine_data:
standard
{"isp"=>{"vac"=>8000.0, "atmo"=>0.0}, "propellant_ratios"=>{}, "max_thrust"=>75.0}
resources:
ThermalPower
3000.0
Megajoules
1.0
WasteHeat
200000.0
ElectricCharge
100.0
Uranium-233
10.0
Actinides
1.0