ABSTRACT
Currently, the trend is to devise small, simple, generally acceptable, reactor systems that can supply some of the enormous low-temperature energy requirements of advanced societies. There is also some interest in extending nuclear technology into the high-temperature field, where the problems are considerable, not the least being the different traditions of the nuclear and heavy industries concerned. It is probable that in both the low-and high-temperature fields, the earliest large-scale application of nuclear heat will be in countries like Japan where the indigenous fuel supplies are limited.
