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The Spherical Tokamak for Energy Production: theme issue introduction
I T Chapman1, S C Cowley2, H R Wilson3
1UK Atomic Energy Authority, Culham Campus , Abingdon, Oxfordshire OX14 3DB, UK.
Summary
The Spherical Tokamak for Energy Production (STEP) project details a prototype fusion power plant design. This summary covers the conceptual design, aiming for net energy and tritium self-sufficiency.
Area of Science:
- Nuclear Fusion Engineering
- Plasma Physics
- Energy Systems
Background:
- The UK government initiated the Spherical Tokamak for Energy Production (STEP) project in 2019.
- STEP aims to develop a prototype fusion power plant utilizing a compact toroidal geometry.
- This initiative represents a significant step towards commercial fusion energy.
Purpose of the Study:
- To present a comprehensive summary of the conceptual design for the STEP fusion power plant.
- To detail the scientific and engineering advancements over five years of design work.
- To provide a snapshot of the current STEP design basis for future evolution.
Main Methods:
- Conceptual design synthesis across multiple scientific and engineering disciplines.
- Focus on achieving net energy output from fusion reactions.
- Development of a tritium fuel self-sufficiency strategy.
- Planning for maintenance regimes suitable for commercial power plant availability.
Main Results:
- A detailed conceptual design basis for the STEP spherical tokamak has been established.
- Key technical aims include net energy production and tritium self-sufficiency.
- A viable maintenance strategy has been outlined for commercial extrapolation.
Conclusions:
- The STEP project has achieved a significant milestone in fusion power plant conceptualization.
- The current design provides a robust foundation for continued development towards fusion energy.
- STEP's compact toroidal geometry offers a promising pathway for future commercial fusion power.
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