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
Sep 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
Fusion Science and Technology
August 2025
Latest News
TVA and Entra1 to deploy 6 GW of NuScale SMRs
The Tennessee Valley Authority and Houston, Texas–based energy production company Entra1 Energy recently announced the signing of an agreement to collaborate on the deployment of six new nuclear power plants equipped with NuScale small modular reactors.
Holger Seher, Guido Bracke, Gerd Frieling, Ingo Kock (GRS)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 35-40
The TOUGH2 code was modified by GRS with several repository-relevant processes (called TOUGH2-GRS) and used as a code for simulating multi-phase flow in porous media. For code development and quality assurance, an extensive program was implemented to demonstrate the correctness and reliability of TOUGH2-GRS.
The LLW/ILW repository “Endlager für radioaktive Abfälle Morsleben (ERAM)” located in Saxony-Anhalt, Germany, was chosen to evaluate the impact of grid complexity on the results obtained by two-phase flow calculations with TOUGH2-GRS for C-14. Three grids with increasing complexity regarding spatial resolution and including multiple mine levels were generated and compared with single-phase-flow calculations with parameter datasets for ERAM, taken from the application for its decommissioning, which is currently under review.
The discharge of relevant nuclides is in all cases below the discharge modeled by single-phase simulations. The calculated discharge of C-14 depends on the complexity of model grids. The highest release of C-14 was calculated for the grid with medium complexity for a scenario with significant brine entry.