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.
Division Spotlight
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Aug 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
October 2024
Nuclear Technology
Fusion Science and Technology
August 2024
Latest News
New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
Pekka Jauho, Jussi Manninen
Nuclear Science and Engineering | Volume 27 | Number 1 | January 1967 | Pages 45-50
Technical Paper | doi.org/10.13182/NSE67-A18041
Articles are hosted by Taylor and Francis Online.
A method based on a power series expansion of the neutron spectrum in time is used to solve the space-independent Boltzmann equation. The coefficients are obtained from a relatively simple recursion formula well suited for numerical calculations. Assuming the atoms of a hydrogenous moderator free when the neutron energy is large, this formula is further simplified. Adopting the Einstein oscillator model and transforming the recursion formula into a matrix equation, the time-dependent energy spectrum of neutrons in zirconium hydride has been calculated with a small computer.