This part is from KSP Interstellar Extended
cost:
800000
mass:
33
category:
Engine
TechRequired:
hidden
engine_data:
standard
{"isp"=>{"vac"=>7000.0, "atmo"=>0.0}, "propellant_ratios"=>{"NuclearSaltWater"=>1.0}, "max_thrust"=>12440.5}
resources:
ThermalPower
3000.0
WasteHeat
200000.0