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.
Keshab Ganguly
Nuclear Science and Engineering | Volume 93 | Number 3 | July 1986 | Pages 308-312
Technical Note | doi.org/10.13182/NSE86-A17759
Articles are hosted by Taylor and Francis Online.
The ideas of the FN and transport PN approximation (TPN) methods in transport theory are suitably combined to formulate an accurate approximation scheme for the monoenergetic transport equation. The method involves the use of the singular integral equation for the surface flux as used in the FN method and angular flux representation of the TPN approximation. This leads to a consistent approximate scheme for the computation of angular flux.
