Fast reactors with axial position of oxide and metal fuels in the core

The results are described of an investigation of another concept, which makes it possible to use metal fuel in the core of a fast reactor under temperature conditions close to previously employed conditions. It follows that fast reactors, in which oxide and metal fuels are used in combination, have an increased specific load and an increased breeding coefficient relative to fast reactors with oxide fuel; this reactor type allows faster rates in the development of the entire nuclear energy generation balanced in regard to fuel. The combined use of mixed oxide and metal fuels requires additional research on the possible operation of fuel elements in such a core.