11. By mid-century fast neutron reactors are seen as the main technology. 12. Fast neutron reactors are planned to contribute 1400 GW by 2100.13. Thermal neutrons are more likely than fast neutrons to cause fission. 14. All other nuclear weapons programs have relied on fast neutrons in their weapons designs. 15. In a fast neutron breeder reactor, all these isotopes may be burned as fuel. 16. Fast neutrons can be rapidly changed into thermal neutrons via a process called moderation.17. Detectors relying on elastic scattering are called fast neutron detectors. 18. Detection of fast neutrons poses a range of special problems. 19. Soviet fast neutron reactors have been using ( high U-235 enriched ) uranium fuel. 20. The tritium was produced during the explosion by irradiating the lithium with fast neutrons .
