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
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
Fusion Science and Technology
August 2025
Latest News
Powering the future: How the DOE is fueling nuclear fuel cycle research and development
As global interest in nuclear energy surges, the United States must remain at the forefront of research and development to ensure national energy security, advance nuclear technologies, and promote international cooperation on safety and nonproliferation. A crucial step in achieving this is analyzing how funding and resources are allocated to better understand how to direct future research and development. The Department of Energy has spearheaded this effort by funding hundreds of research projects across the country through the Nuclear Energy University Program (NEUP). This initiative has empowered dozens of universities to collaborate toward a nuclear-friendly future.
Vincent P. Manno, Michael W. Golay, Kang Y. Huh
Nuclear Science and Engineering | Volume 87 | Number 4 | August 1984 | Pages 349-360
Technical Paper | doi.org/10.13182/NSE84-A18504
Articles are hosted by Taylor and Francis Online.
Analytical models formulated to model accurately hydrogen transport in containments are presented. These models have been incorporated into the LIMIT computer code. The thermofluid dynamic model options span a wide range of applicability from rapid blowdown-type events to slow near-incompressible hydrogen injection. The utilization of distinct modeling treatments for the various accident stages is important, since the blowdown period is governed by thermofluid dynamic mechanisms (high Mach number, turbulent, multiphase forced convection), which are different from those of the postblowdown phase (low speed, multiphase, stratified natural convection). Detailed ancillary models of molecular and turbulent diffusion, mixture transport, and thermodynamic properties and heat sink modeling are addressed. The numerical solution of the governing equations is accomplished in discretizations of varying refinement, as are required for the successive stages of a containment accident, and emphasizes efficiency and accuracy. Two demonstration calculations are reported including the successful simulation of a large-scale experiment and the reproduction of an analytic result. Areas worthy of future development are also described. Overall, a versatile analysis methodology is introduced.