ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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.
2021 Student Conference
April 8–10, 2021
North Carolina State University|Raleigh Marriott City Center
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!
Latest Magazine Issues
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
A day in the life of the nuclear community
The November issue of Nuclear News is focused on the individuals who make up our nuclear community.
We invited a small group of those individuals to tell us about their day-to-day work in some of the many occupations and applications of nuclear science and technology, and they responded generously. They were ready to tell us about the part they play, together with colleagues and team members, in supplying clean energy, advancing technology, protecting safety and health, and exploring fundamental science.
In these pages, we see a community that can celebrate both those workdays that record progress moving at a steady pace and the exceptional days when a goal is reached, a briefing is delivered, a contract goes through, a discovery is made, or an unforeseen challenge is overcome.
The Nuclear News staff hopes that you enjoy meeting these members of our community—or maybe get reacquainted with friends—through their words and photos.
H. Guo, T. Kooyman, P. Sciora, L. Buiron
Nuclear Technology | Volume 205 | Number 11 | November 2019 | Pages 1447-1459
Technical Paper | dx.doi.org/10.1080/00295450.2019.1611304
Articles are hosted by Taylor and Francis Online.
The reduction of the initial excess reactivity in fast reactor cores will enhance the inherent safety level of the cores as it does reduce the impact of control rod withdrawal (CRW) accidents. Compensation for burnup reactivity loss by means of burnable poison (BP) is considered as a possible solution to limit initial excess reactivity. Minor actinides (MAs) challenge long-term nuclear waste management, and they can be transmuted from absorber isotopes to fissile isotopes, which allows them to play the role of BPs.
Two loading modes of MAs as BPs are considered in this paper: The so-called homogeneous transmutation mode mixes MAs with the fuel, and the so-called hybrid transmutation mode packs MAs in independent pins in the fuel assemblies. The content of americium or neptunium in these two modes is considered with regard to current technological feasibility, including burnup, cladding stress, decay heat, and the neutron source of the assemblies considered here. Both of these modes are able to compensate for the reactivity loss of a 3600-MW(thermal) fast reactor and thus reduce excess reactivity at the beginning of cycle.
The impact of MA loading on the core characteristics, including power distribution, material balance, and feedback coefficient, is considered from the assembly level to the core level. The hybrid mode shows better management feasibility while the use of neptunium exhibits a lower impact on the current fuel recycling. Finally, the core behavior during a CRW transient is evaluated, which shows that the core loaded with BPs exhibits better safety performance in CRW transients due to their lower initial excess reactivity.