This part is from Far Future Technologies
cost:
255000
mass:
30.32
category:
Engine
TechRequired:
nuclearPropulsion
engine_data:
standard
{"isp"=>{"vac"=>9500.0, "atmo"=>190.0}, "propellant_ratios"=>{"FissionPellets"=>1.0, "ElectricCharge"=>8.961057692}, "max_thrust"=>520.0}