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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
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
P. R. Davis
Nuclear Technology | Volume 11 | Number 4 | August 1971 | Pages 551-556
Technical Paper | Symposium on Fuel Rod Failure and Its Effect / Fuel | doi.org/10.13182/NT71-A30852
Articles are hosted by Taylor and Francis Online.
A nine-pin array of electrical heaters was used to study the effects of partial flow blockage on the capability of cooling the array through injection of water under simulated reactor decay heat power conditions. The array was placed in a transparent tube and tests were conducted with six different blockage configurations. Tests were conducted by slowly heating the array until the temperature at the midelevation of the center pin was 1100°F. Full power (1 kW/ft) was then applied, until a midelevation temperature of either 1600 or 1800°F was reached. Bottom flooding was then initiated at a flow rate of 2 in./ sec. Tests were conducted at both temperatures for each configuration. Temperatures were recorded at selected locations on one row of three heaters and high-speed motion pictures were taken. These tests, conducted for a variety of blockage geometries, demonstrated that severe flow blockage of a small fuel pin array does not result in significant reduction in the effectiveness of cooling the array by emergency cooling flooding.
