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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.
F. L. Fillmore
Nuclear Science and Engineering | Volume 1 | Number 5 | October 1956 | Pages 355-358
Technical Paper | doi.org/10.13182/NSE56-A28773
Articles are hosted by Taylor and Francis Online.
The calculation of the resonance escape probability in a lattice by means of a diffusion theory model requires a knowledge of the logarithmic energy width, ln E1/E2, of the resonance absorption region. This quantity is evaluated by fitting the results of a diffusion theory analysis which is averaged over neutron energy to an experimental value of the effective resonance integral. The result is In E1/E2 ≃ 2.6, which is much less than the value 5.6 which is ordinarily used in these calculations.
