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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.
R. P. Schuman, J. R. Berreth
Nuclear Science and Engineering | Volume 12 | Number 4 | April 1962 | Pages 519-522
Technical Paper | doi.org/10.13182/NSE62-A26100
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The thermal cross sections and the resonance integrals have been measured for the activation of Pm147 to both Pm148 isomers. The thermal activation cross sections are: 124 ± 13 barns to 5.39-day Pm148 and 111 ± 11 barns to 40.6-day Pm148m. The resonance integrals are: 1700 ± 250 barns to 5.39-day Pm148 and 1520 ± 230 barns to 40.6-day Pm148m. Approximate cross sections have been obtained for neutron capture by both Pm148 isomers. The pile cross section of 40.6-day Pm148m is 29,000 ± 5000 barns and is due mainly to thermal neutron capture. The pile cross section of 5.39-day Pm148 is 3,000 ± 2,000 barns and is due mainly to resonance neutron capture.
