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 Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
September 2024
Nuclear Technology
Fusion Science and Technology
August 2024
Latest News
SRS partnership’s mission is to dissolve spent fuel
A collaboration between Savannah River Nuclear Solutions (SRNS) and Savannah River National Laboratory (SRNL) is making progress toward processing non-aluminum spent nuclear fuel (NASNF) as part of the site’s accelerated basin de-inventory mission. SRNL is the managing and operating contractor at the Department of Energy’s Savannah River Site in South Carolina.
Alexey Golubev, Yuri Balashov, Sergey Mavrin, Valentina Golubeva, Dan Galeriu
Fusion Science and Technology | Volume 67 | Number 2 | March 2015 | Pages 349-352
Proceedings of TRITIUM 2013 | doi.org/10.13182/FST14-T27
Articles are hosted by Taylor and Francis Online.
Washout coefficient Λ is widely used as a parameter in washout models. These models describes overall HTO washout with rain by the first-order kinetic equation, while washout coefficient Λ depends on the type of rain event and rain intensity and empirical parameters a, b. It was shown recently that variations of published data of washout coefficient are significant. Thus Λ = 10−4 sec−1 for the light rain event (∼ 1 mm-hour−1) while Λ = 10−3 sec−1 for heavy rain (∼ 25 mm-hour−1). Canadian standard recommends washout coefficient of 1.8-10−4 sec−1, German standard gives 3.5-10−5sec−1, while published Japan data varies from Λ = (7.3 ± 4.1)-10−5 sec−1 at 2 mm hour−1 to Λ = 4.6-10−4 sec−1 for the same rain intensity. This means that further investigations of HTO washout process are required. One of the issues is determining the useful relationship between macroscopic parameter of HTO washout Λ and microscopic HTO exchange rate of HTO molecules in atmosphere and in the raindrop water. Approaches to address this issue have been presented elsewhere. It can be shown that the empirical parameters a, b can be represented through the rain event characteristics using the relationships for molecular impact rate, rain intensity and specific rain water content while washout coefficient can be represented through the exchange rate K, rain intensity, raindrop diameter and terminal raindrop velocity.