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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
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
NRC engineers share their expertise at the University of Puerto Rico
Robert Roche-Rivera and Marcos Rolón-Acevedo are licensed professional engineers who work at the U.S. Nuclear Regulatory Commission. They are also alumni of the University of Puerto Rico–Mayagüez (UPRM) and have been sharing their knowledge and experience with students at their alma mater since last year, serving as adjunct professors in the university’s Department of Mechanical Engineering. During the 2023–2024 school year, they each taught two courses: Fundamentals of Nuclear Science and Engineering, and Nuclear Power Plant Engineering.
Sadek Hossain Nishat, Md. Hossain Sahadath, Farhana Islam Farha
Nuclear Science and Engineering | Volume 196 | Number 5 | May 2022 | Pages 623-636
Technical Note | doi.org/10.1080/00295639.2021.2003644
Articles are hosted by Taylor and Francis Online.
A thermal-hydraulic study of an isolated Advanced Gas-Cooled Reactor (AGR) nuclear fuel rod with smooth and rough cladding surfaces is carried out by computational fluid dynamics simulation and analytical calculation. Square transverse ribs of various pitch/height ratios (6:12) are considered for the rough surface. Parameters of the rough cladding surface show greater values than those for the smooth surface except for surface heat flux. It is found that only the average surface heat flux increases with an increasing pitch/height ratio. On the other hand, the average values of wall shear stress, Darcy friction factor, skin friction factor, convective heat transfer coefficient, Nusselt number, and thermal-hydraulic performance decrease with an increasing pitch/height ratio. The simulated results are found to be very close to the values obtained from an analytical calculation. Also, square and circular ribs are compared. The circular ribs show lower values of convective heat transfer coefficient and wall shear stress but permit high surface heat flux. The results of this study will help researchers comprehend the effect of cladding surface roughness on fuel rod thermal behavior.