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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
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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!
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Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Nancy Ma, John Walker, Tess Moon, Thanh Hua, Basil Picologlou
Fusion Science and Technology | Volume 25 | Number 4 | July 1994 | Pages 398-410
Technical Paper | Blanket Engineering | doi.org/10.13182/FST94-A30246
Articles are hosted by Taylor and Francis Online.
The three-dimensional magnetohydrodynamic (MHD) flow in a pair of finite-length, parallel, equal-area square ducts, connected to single rectangular ducts upstream and downstream is examined. Each duct has a different liner with a thin sheet of metal that is in contact with the coolant and that is electrically insulated from structural walls and from other duct liners, except at the junctions. The objective is to concentrate most of the flow in one of the two parallel ducts by making its metal wall much thinner than that of its neighbor, so that its MHD resistance to flow is smaller. Flow ratios approaching ten are obtained with typical values of the wall conductance ratios, which are proportional to the wall thicknesses. The flow at the entrance is complex, with some flow entering the low-velocity duct and then returning to the entrance, where it swirls around the upstream edge of the common wall to enter the high-velocity duct. The balance between three-dimensional and fully developed pressure drops is investigated as a function of the distance between the entrance and the exit of the parallel ducts.