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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.
D. G. Doran
Nuclear Science and Engineering | Volume 52 | Number 3 | November 1973 | Pages 398-402
Technical Note | doi.org/10.13182/NSE73-A19486
Articles are hosted by Taylor and Francis Online.
The effects of some recent developments on displacement cross sections published by the author for iron, chromium, nickel, 18/10 stainless steel, and tantalum are discussed. It is argued that, except for tantalum, the cross sections are essentially consistent with ENDF/B-III, and, furthermore, can be made consistent with an International Atomic Energy Agency recommended secondary displacement model by multiplying by 0.66. A re determination of the tantalum displacement cross section has been made using ENDF/B-III data and an effective displacement energy of 90 eV deduced from a recent measurement of the displacement threshold surface for tantalum. Estimates are made of the contributions to displacement cross sections of several previously ignored nonelastic processes. Finally, the usefulness of the isotropic elastic-scattering approximation at high neutron energies is discussed.