sea level thrust: 550000 pounds
vacum thrust: 620000 P
reactor power: 13200 megawatts
operating pressure: 1470 psi
fuel: UO2
moderator: graphite
average core temperature: 3142ºf
gas exit temperature: 2942ºf
nozzle expansion ratio: 20
total engine weight: 66400 pounds.
reference image.

fuente Sinyarev, G.B. and Dobrovolski. Zhidkostyne Raketny Dvigateli, Moscow 1957