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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!
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Latest News
College students help develop waste-measuring device at Hanford
A partnership between Washington River Protection Solutions (WRPS) and Washington State University has resulted in the development of a device to measure radioactive and chemical tank waste at the Hanford Site. WRPS is the contractor at Hanford for the Department of Energy’s Office of Environmental Management.
Weikai Gao, Xiaowei Li, Xinxin Wu, Jiaqing Zhao, Yiyang Zhang, Xiaowei Luo (Tsinghua Univ)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 1193-1198
High Temperature Gas-cooled Reactor usually adopts helical tube bundles for its heat transfer equipment (steam generator or intermediate heat exchanger). The geometrical arrangement of helical tube bundles determines its thermal hydraulic performances. The flow attack angles between the tube axes of helical tubes and the fluid flow directions are smaller than 90 degrees, which is introduced by the inclination of the helical tubes due to upward winding. Except for the parameters of tube diameter, helical diameter, longitudinal pitches, transverse pitches and inclination angles, the inclination direction (or winding direction) of neighboring layers of helical tubes also influences the thermal hydraulic performances. The opposite sense inclination effect is numerically investigated. A three dimensional model having 5 layers of straight tubes with opposite sense inclination of neighboring layers is established. Standard k-? model was used for the turbulence modeling. The velocity and temperature field were investigated. Special attention is paid on the opposite sense inclination effect on pressure drop and heat transfer coefficient. The results show that the opposite sense inclination will lower the heat transfer coefficient and pressure drop coefficient, which coincides with the measured results.