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
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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
Apr 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
May 2024
Nuclear Technology
Fusion Science and Technology
Latest News
NWMO to select Canadian repository site this year
Canada’s Nuclear Waste Management Organization, a not-for-profit organization responsible for the long-term management of the country’s intermediate- and high-level radioactive waste, is set to select a site for a deep geologic repository by the end of the year.
Taro Ueki
Nuclear Science and Engineering | Volume 157 | Number 2 | October 2007 | Pages 119-131
Technical Paper | doi.org/10.13182/NSE07-A2717
Articles are hosted by Taylor and Francis Online.
A variance reduction method has been developed for the Monte Carlo calculation of electron emission energy profile induced by photon radiation. The spatial control of particle weight was exclusively investigated. It was derived that the photon weight in the electron range at an electron detection surface should be equal to the electron weight that is determined to be inversely proportional to the electron adjoint function. Therefore, the preliminary Monte Carlo calculation of the forward electron-only problem with the uniform electron source over the maximum electron range, maximum allowed energy, and all solid angles was conducted to create the photon and electron weight window. The photon weight window more than the maximum electron range away from the electron detection surface was made constant. Monte Carlo simulations of photon and electron coupled-transport were conducted for slab materials with photons normally incident on one side and the electron energy profile to be evaluated on the other side. Numerical results show that efficiency gain with respect to the simulation with no weight control is significant for slabs of typical low and high atomic number materials even if taking into account time spent on the preliminary Monte Carlo calculation of the electron adjoint function.