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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 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!
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Nuclear Science and Engineering
November 2024
Nuclear Technology
Fusion Science and Technology
Latest News
The D&D of SM-1A
With the recent mobilization at the site of the former SM-1A nuclear power plant at Fort Greely, Alaska, the Radiological Health Physics Regional Center of Expertise, located at the U.S. Army Corps of Engineers’ Baltimore District, began its work toward the decommissioning and dismantlement of its third nuclear power plant, this time located just 175 miles south of the Arctic Circle.
Z. Miles, A. Balodhi, T. Seuaciuc-Osorio, J. J. Wall, M. Guimaraes, A. Zevalkink, S. K. Chakrapani
Nuclear Technology | Volume 210 | Number 8 | August 2024 | Pages 1279-1294
Research Article | doi.org/10.1080/00295450.2023.2291602
Articles are hosted by Taylor and Francis Online.
Grade 91 steel has been used in nuclear and fossil power plants since the 1970s. Manufacturing variabilities resulting from manufacturing, repair, and management activities have been attributed to lowered creep and fatigue life. This paper characterizes the elastic, thermal, and anelastic properties of P91 steel with different microstructures. Eight different microstructural conditions were identified as acceptable, gross, and gradual degradations. Ultrasonic testing was used to measure velocities, and resonant ultrasound spectroscopy was used to measure internal friction. The thermal diffusivity was measured along with Vicker’s hardness and grain size. A model for internal friction was used to combine the measured elastic and thermal properties. The results suggest that the current understanding of internal friction and its sources may be incomplete for complex microstructures like grade 91. From an nondestructive evaluation perspective, the results suggest that the internal friction has the highest sensitivity to microstructure changes, compared to elastic and thermal properties.
