During the period from 1973 to 1983, however, significant research on advanced low-temperature thermionic converter technology for fossil-fueled industrial and commercial electric power production was conducted in the US, and continued until 1995 for possible space reactor and naval reactor applications.
U razdoblju 1973-1983 značajno istraživanje na naprednom nisko-temperaturnoj tehnologiji termioničkog generatora za proizvodnju električne energije industrijskih i komercijalnih fosilnih goriva provedeno je u SAD-u, i nastavilo se do 1995 za moguće primjene kod svemirskog reaktora i pomorskog reaktor.