Estimated neutron balance of thermal and fast reactor.

Table 3: Estimated neutron balance of thermal and fast reactor.

Items	Thermal Reactor	Fast Reactor
Number of fission neutrons per one neutron capture	2.1	2.5
To sustain chain reactions	1.0	1.0
To be captured by coolant and structure material	0.5	0.1
Maximum number of neutrons available to transmutation, which are used to conversion of ²³⁸U to ²³⁹Pu in conventional reactors	0.6	1.4
Total	2.1	2.5