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.
Eugene Starr, Juan Koppel
Nuclear Science and Engineering | Volume 14 | Number 3 | November 1962 | Pages 224-229
doi.org/10.13182/NSE62-A26210
Articles are hosted by Taylor and Francis Online.
Diffusion lengths have been measured in H2O as a function of boric acid concentration. From these measurements of diffusion lengths, the diffusion parameters of water were determined by an improved method of analysis. The diffusion parameters for water reported are: the microscopic absorption cross section σa = 326.9 ± 1.6mb, the diffusion coefficient = 35,850 ± 100 cm2/sec and the diffusion hardening coefficient H = 2900 ± 350 cm4/sec.
