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
Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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
June 2024
Nuclear Technology
May 2024
Fusion Science and Technology
Latest News
Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
Philipp Schaedle, Nicolas Hubschwerlen, Holger Class
Nuclear Technology | Volume 187 | Number 2 | August 2014 | Pages 188-197
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT13-82
Articles are hosted by Taylor and Francis Online.
The long-term safety performance of a potential deep geological repository for high-level and intermediate-level long-lived nuclear waste is studied through a numerical simulation program that requires simulation tools capable of modeling appropriately the phenomenologies of interest in the repository and its environment. Because of the complexity of the modeled layout, the numerous physical processes involved, and the simulated times (up to one million years), the computational needs are very high. TOUGH2-MP is a very suitable tool for modeling the impact that the heat and gas generated in the emplacement areas may have on the evolution of the fluid pressure and on the saturation fields in the repository's drifts and shafts as well as in the host rock itself. The module EOS7R also gives the possibility to compute a coupled radionuclide transfer. Regarding computational efficiency, it is of interest to decouple the transport from the hydraulic calculation for three main reasons. First, this allows the hydraulic calculation to be used once for several transport computations of a performance analysis and safety assessment study, which is expected to lead to a substantial gain in CPU time. Second, it allows optimization of the discretization separately for both hydraulic and transport calculations. Third, it allows combination of the TOUGH2 hydraulic and other codes modeling radionuclide transport, which allows consideration of phenomenologies that are not available in TOUGH2. This work shows how to establish a sequential approach between TOUGH2 and another code. It presents the conditions of use of such an approach, in terms of performance and the impact of the temporal discretization on the results.