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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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A webinar, and a new opportunity to take ANS’s CNP Exam
Applications are now open for the fall 2025 testing period for the American Nuclear Society’s Certified Nuclear Professional (CNP) exam. Applications are being accepted through October 14, and only three testing sessions are offered per year, so it is important to apply soon. The test will be administered from November 12 through December 16. To check eligibility and schedule your exam, click here.
In addition, taking place tomorrow (September 19) from 12:00 noon to 1:00 p.m. (CDT), ANS will host a new webinar, “How to Become a Certified Nuclear Professional.” More information is available below in this article.
Alisha Kasam-Griffith, Milos Atz, Tingzhou Fei, Zhaopeng Zhong, Michael Jarrett, Florent Heidet
Nuclear Science and Engineering | Volume 196 | Number 1 | October 2022 | Pages S38-S49
Technical Paper | doi.org/10.1080/00295639.2022.2031712
Articles are hosted by Taylor and Francis Online.
Successful operation of the Versatile Test Reactor (VTR) relies on satisfying stakeholder requirements and guaranteeing customer timelines. Although the VTR leverages proven sodium fast reactor technology, its mission as a test reactor introduces unique design and operational requirements. This paper covers the preliminary analysis and methodology development for two areas of the VTR core design related to the operational flexibility necessary for the testing mission. The first of these introduces a framework for assessing the feasibility of storing used driver fuel in the VTR shield region, which offers potential benefits to operations but may affect core reactivity and increased cooling time. A methodology to assess these impacts using neutronics and depletion calculations is demonstrated on three in-shield storage configurations. The second focus area highlights operational considerations and maximum residence time of the VTR control assemblies, which are critical to maintaining the irradiation environment necessary to deliver on the VTR mission. A preliminary methodology that assesses B-10 depletion and absorber rod swelling is demonstrated with the goal of informing future development. Together, these research activities illustrate how the early-stage VTR design is guided by anticipation of operating objectives.