from “Nuclear-powered aircraft” (“Применение атомных двигателей в авиации”), published in 1957, by G. Nesterenko, A. Sobolev, and Yu. Sushkov.
Fig. 54: “Shadowing” for protection of passengers and crew. Fig. 55: Passenger nuclear aircraft (“duck”-type) Fig. 63: A variant of nuclear aircraft with reliable and complete radiation protection . (Kindly submitted by Mr Alexey Mahotkin - immense thanks.)