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Autonomous Reactivity Control (ARC) - Principles, geometry and design process
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Royal Inst Technol, Div Reactor Technol, Stockholm, Sweden..
Gen Elect Adv Reactor Syst Dept, Sunnyvale, CA USA..
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2016 (English)In: Nuclear Engineering and Design, ISSN 0029-5493, E-ISSN 1872-759X, Vol. 307, p. 249-274Article in journal (Refereed) Published
Abstract [en]

The Autonomous Reactivity Control (ARC) system was developed to ensure inherent safety performance of Generation-IV reactors while having a minimal impact on reactor performance and economic viability. Here we present in detail the principles of how the ARC system operates, what materials should be used, what components make up the system and how they are interconnected. The relevant equations regarding how to design the system for a certain response are developed and defined, and the most important aspects determining the speed of actuation of the systems are analyzed. Thus, this study serves as the general reference material for all of the fundamental principles behind the ARC idea. Finally, we present a step-by-step guide to how a fast reactor fuel subassembly with an ARC system installed would be manufactured, using a full 3D-CAD model. For an ARC installation in a 1000 MWth sodium-cooled oxide fueled fast reactor core, the system constitutes a relatively minor adjustment to a typical fuel assembly, increasing its total axial extent by similar to 5-10% and the total primary coolant pressure drop by similar to 1%. The main finding of this study is that it is possible to design, manufacture (using existing methods) and implement ARC systems in the fuel assemblies of fast reactor cores to provide inherent safety in all anticipated unprotected transients with only a modest increase in the length of the assembly and the pressure drop across the core.

Place, publisher, year, edition, pages
2016. Vol. 307, p. 249-274
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-305316DOI: 10.1016/j.nucengdes.2016.07.018ISI: 000383824400021OAI: oai:DiVA.org:uu-305316DiVA: diva2:1037758
Available from: 2016-10-18 Created: 2016-10-14 Last updated: 2017-11-29Bibliographically approved

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