
Stefano SegantinMassachusetts Institute of Technology | MIT · Plasma Science and Fusion Center (PSFC)
Stefano Segantin
Doctor of Philosophy
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30
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297
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September 2018 - September 2021
Publications
Publications (30)
In the pursuit of fusion power, achieving tritium self-sufficiency stands as a pivotal challenge. Tritium breeding within molten salts is a critical aspect of next-generation fusion reactors, yet experimental measurements of Tritium Breeding Ratio (TBR) have remained elusive. Here we present the results of the Build A Better Yield blanket experimen...
In the pursuit of fusion power, achieving tritium self-sufficiency stands as a pivotal challenge. Tritium breeding within molten salts is a critical aspect of next-generation fusion reactors, yet experimental measurements of \gls{tbr} have remained elusive. Here we present the results of the \gls{baby} experiment, which represents a pioneering effo...
Neutron irradiation of a molten salt tritium breeder is planned to evaluate tritium accountancy in the liquid immersion blanket robust accountancy (LIBRA) project at MIT. A sealed-tube deuterium-tritium (DT) fusion neutron generator (NG) will be used for the irradiation. Hence, the NG’s characterization is necessary to evaluate the tritium accounta...
The MANTA (Modular Adjustable Negative Triangularity ARC-class) design study investigated how negative-triangularity (NT) may be leveraged in a compact, fusion pilot plant (FPP) to take a ‘power-handling first’ approach. The result is a pulsed, radiative, ELM-free tokamak that satisfies and exceeds the FPP requirements described in the 2021 Nationa...
The MANTA (Modular Adjustable Negative Triangularity ARC-class) design study investigated how negative-triangularity (NT) may be leveraged in a compact, fusion pilot plant (FPP) to take a ``power-handling first" approach. The result is a pulsed, radiative, ELM-free tokamak that satisfies and exceeds the FPP requirements described in the 2021 Nation...
High Temperature Superconductor (HTS) magnets, wound using cable-in-conduit, can support the development of compact, nuclear fusion machines, provided they can be kept at the appropriate temperature and shielded from the damage of nuclear irradiation. A comprehensive interdisciplinary integrated multi-physics approach is essential to address therma...
Radiation shielding design is a crucial step in the development of a nuclear fusion reactor. Superconducting magnets are indeed a highly engineered component whose properties are particularly sensitive to irradiation damage. In addition, novel magnet technologies, such as High Temperature Superconductors (HTS), and the attractiveness of compact tok...
The rapid rise in nuclear energy use outside the EU (China, India, etc.) also means that the EU needs to maintain its global leadership and excellence in the technology and safety domains, also via the development and finalization of the ITER project, a first-of-a-kind nuclear fusion device being now built in France and aimed at the technological d...
Nuclear energy is being reconsidered worldwide as a low-carbon and dispatchable energy source. Following the development of Small Modular Reactors (SMR) to reduce the capital costs and increase the safety of new nuclear power plants, microreactors are being designed by several companies. Microreactors are usually defined as SMR with a power output...
The fusion pilot power plant ARC is a conceptual design of a D–T Tokamak under investigation at the Massachusetts Institute of Technology. Special attention is paid on the radiological hazard, which until now has been translated in the reduction of materials activation. Indeed, one of ARC main goals is to be fast deployable in any US site: thus, th...
The proposed blanket for Affordable Robust Compact (ARC) reactor is one of the simplest blanket concepts. It is a bulk tank filled with a lithium and beryllium fluorides molten salt. The fluid effectively works as tritium breeder, vessel coolant and neutron moderator and shield. However, despite the simplicity of the concept, the compactness of the...
The Affordable Robust Compact (ARC) reactor is a conceptual design for a Tokamak conceived by Massachusetts Institute of Technology researchers. The ARC design is under development and update.
Since ARC will be a D–T tokamak, neutron generation and material activation will be main issues for safety studies and assessment of environmental impact and...
Neutron irradiation is one of the most concerning issues to design plasma facing components and reactor inner structures in fusion devices, especially for high power density ones, like ARC reactor. This study addresses the main aspects of neutron irradiation on solid materials of ARC reactor. In particular it deeply analizes the effect of neutron i...
Nuclear energy was adopted in Italy in the past to deal with the insufficient fossil fuels on the national territory. After a public vote subsequent to the Chernobyl accident, Italy abandoned the use of nuclear energy and nowadays adopts a mix of fossil fuels and renewable energy sources for electricity production. However, the urging environmental...
In the worldwide energy industry, nuclear fusion could be a breakthrough in the medium-long term. One promising fusion machine under design at Massachusetts Institute of Technology is ARC reactor. It is likely that the first nuclear fusion plants will rely on a traditional thermodynamic cycle for the downstream power energy conversion. In this fram...
Progress in technological fields such as high-temperature superconductors, additive manufacturing, and innovative materials has led to new scenarios and to a second generation of fusion reactor designs. The new Affordable Robust Compact (ARC) fusion reactor, which compared to other designs meets its goal to achieve fusion energy in a less expensive...
The new Affordable Robust Compact (ARC) fusion reactor, which, compared to larger machines like ITER, aims to achieve its goal of fusion energy in a less expensive and smaller but even more powerful and faster way with new high-field, high-temperature superconducting magnets, has been designed in the United States. The research tokamak aimed at the...
«Aracne» is an Italian monitoring network, part of the «Tellus» project, for the real-time The Aracne network was launched in August 2015, with the first multi-parameter station in Pizzoli, in central Italy, followed in December 2016 by the one of Cagnano Amiterno and finally the station of Capitig...
Energy studies are interdisciplinary studies. They involve not just technical aspects, but also environmental, social and political aspects. In this framework, an advanced technological innovation as a part of simple solution for the energy problem is considered. The role of the fusion energy as new energy source and in particular the project Affor...
Energy studies are today interdisciplinary studies. They involve not just technical aspects, but also environmental, social and politic aspects. In this framework, an interdisciplinary approach to help solve energy issue through advanced technological innovations as a part of simple solution for the energy problem is considered. Two case studies we...
The recent progress in fields such as High Temperature Superconductors (HTS), Additive manufacturing, new diagnostics, and innovative materials, has led to new scenarios and to a second generation of Nuclear Fusion Reactor designs. The new Affordable Robust Compact (ARC) Fusion Reactor is described in the paper. ARC could be not only the base-load...
Nuclear energy is facing a crisis due to the lack of widely accepted solutions to some of its issues: radioactive waste management, health impact on population and workers in case of severe accident, nuclear proliferation, effectiveness in solving the global warming issue. Fusion energy is presently seen just as a candidate long-term solution to th...
The recent progress in fields such as High Temperature Superconductors (HTS), Additive manufacturing, new diagnostics, and innovative materials, has led to new scenarios and to a second generation of Nuclear Fusion Reactor designs. The new Affordable Robust Compact (ARC) Fusion Reactor is described in the paper. ARC could be not only the base-load...