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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.
V. Spiegel
Nuclear Science and Engineering | Volume 54 | Number 1 | May 1974 | Pages 28-34
Technical Paper | doi.org/10.13182/NSE74-A23390
Articles are hosted by Taylor and Francis Online.
The age of 252Cf fission neutrons to indium resonance energy (1.44 eV) was measured in water using a source encapsulated in a 7.6-mm-diam by 7.6-mm-high cylinder. The correction for the displacement of the moderator by the source was experimentally determined to be -0.13 cm2 or about -0.5% in approximate agreement with calculation. The distribution of indium resonance energy neutrons close to the source was measured to be Gaussian. The age measured for this experiment was 28.69 ± 0.39 cm2. An average energy for the 252Cf neutron spectrum of 2.21 ± 0.05 MeV is inferred from this age.
