Neutronic Constraints of Microreactors

The discussion highlights that neutronic constraints, particularly geometric ones, pose significant challenges for the development of microreactors. It explains that designing a neutronically efficient micro reactor becomes impractical because as multiple small reactors are grouped closely together, neutrons from one can escape and fuel another, effectively consolidating them into a larger reactor. This inherent geometric issue cannot be solved through modular production methods or factory fabrication approaches, which limits the ability to create cost-effective, miniature reactors. This fundamental property of nuclear physics plays a crucial role in the feasibility and economic viability of these small reactor systems.