ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
Latest Magazine Issues
Jul 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
August 2026
Nuclear Technology
July 2026
Fusion Science and Technology
Latest News
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.
Harvey J. Amster, Robert C. Gast
Nuclear Science and Engineering | Volume 11 | Number 2 | October 1961 | Pages 192-198
Technical Paper | doi.org/10.13182/NSE61-A28064
Articles are hosted by Taylor and Francis Online.
For each plane over which foil activation was integrated in the preceding article, the corresponding value was calculated by the DAEDALUS code with an assumed set of D-D, hydrogen, and oxygen cross sections. Account was taken of the foil angular sensitivity and the finite size of the source tube. The experimental and theoretical values agree well at individual planes and yield ages of 126 ± 1 cm2 and 129 ± 1 cm2 respectively. Since this slight discrepancy is opposite in direction to that for fission spectrum neutrons, one might suspect that it was caused by unjustifiably ignoring certain effects in the analysis; however, an account of most of these effects would increase the calculated age still further.