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The deadline arrives: Checking in on the Reactor Pilot Program
On May 23, 2025, President Trump signed Executive Order 14301, “Reforming Nuclear Reactor Testing at the DOE,” which instructed the Department of Energy to create a Reactor Pilot Program (RPP)—a new system in which companies could pursue DOE authorization to build and test their first-of-a-kind nuclear technologies. EO 14301 set an ambitious goal for that program: three reactors achieving criticality by July 4, 2026.
Guillermo Velarde, Carolina Ahnert, José M. Aragonés
Nuclear Science and Engineering | Volume 66 | Number 3 | June 1978 | Pages 284-294
Technical Paper | doi.org/10.13182/NSE78-A27213
Articles are hosted by Taylor and Francis Online.
The time-dependent Boltzmann equation for neutron transport is transformed into eigenvalue equations in k, λ, γ, and α, whose general properties are stated as hypotheses. Numerical solutions are obtained with the discrete-ordinates code DTF, where a direct λ eigenvalue calculation has been added. Eigenvalues and eigenfunctions are analyzed for idealized fast and thermal systems in both bare and reflected configurations. The differences found in these idealized cases provide some useful bases for estimating the behavior of the different eigenvalue solutions in specific applications.