The steps taken in our country to develop reactor systems for several gener
ations for ships for the nuclear-powered civilian fleet, starting with the
icebreaker "Lenin," are described. The characteristics of the OK-150, OK-90
0, and KLT-40 systems are briefly presented; the results of their operation
for the period from 1959 to 2000 are presented. Problematic questions asso
ciated with further use of the nuclear-powered fleet in the Arctic, includi
ng increasing the service life of the main equipment, are examined. The pro
spects for using the ship reactor system KLT-40S for floating thermoelectri
c power plants and power and desalination systems for remote coastal region
s of Russia and other countries in the world nle determined on the basis of
the experience gained in operating nuclear-powered icebreakers.