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Division Spotlight
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
Meeting Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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NRC cuts fees by 50 percent for advanced reactor applicants
The Nuclear Regulatory Commission has announced it has amended regulations for the licensing, inspection, special projects, and annual fees it will charge applicants and licensees for fiscal year 2025.
P. Pohl , M. Wimmers, T. Kindt, W. Feltes, U. Schmid, H. Jung
Nuclear Science and Engineering | Volume 97 | Number 1 | September 1987 | Pages 64-71
Technical Paper | doi.org/10.13182/NSE87-A23497
Articles are hosted by Taylor and Francis Online.
The measurements that were made in recent years to determine the hot and the cold coefficient of reactivity and the corresponding model calculations carried out by both Interatom and Hochtemperaturreaktorbau are described. The effects of the partial load of low-enriched uranium (LEU) fuel were of major interest. The cold coefficient is determined in shutdown periods by measuring the subcriticality at different core temperatures. The hot coefficient is determined under operation in connection with a change in coolant outlet temperature at constant power using a calibrated rod curve. In the case of the cold coefficient, experiment and model calculations are in perfect agreement. Calculated values for the hot coefficient are ∼20% lower than the experimental ones. However, neither experiment nor model calculation show any significant change of the hot coefficient when about one-fourth of the core content was being replaced by LEU fuel.
