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Manufacturing Technology Insights | Tuesday, July 19, 2022
Enhancement of technology in cryogenics should be focused on and investigation of the potential leaders for advancement in STEP fusion
FREMONT, CA: Deliver a prototype fusion energy plant in the UK by 2040, and then chart a sustainable, long-term course to nuclear fusion's commercial viability. The scientists, engineers, and project managers–who are currently sweating the details for the conceptual design of the so-called Spherical Tokamak for Energy Production (STEP)–face this lofty objective, as well as an even loftier timeframe. STEP's four-year, 220 million Euro design phase is currently well underway and is scheduled to be finished by the middle of 2024. The Joint European Torus (JET) and the Mega Amp Spherical Tokamak Upgrade (MAST-U) are two cutting-edge experimental fusion reactors that are already located in the UK Atomic Energy Authority (UKAEACulham )'s Science Centre in Oxfordshire (JET).
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The spherical tokamak capability developed at MAST-U (and its parent facility MAST) over the past two decades is being hailed as the forerunner for a compact, cost-effective, and commercially scalable next-generation fusion power plant. STEP will draw on the extensive domain knowledge and expertise of both of these established projects. Of course, the related industry supply chain–that sources the key enabling technologies and advances needed to make commercial fusion a reality–is also vital. Several intricate cryogenic systems will be necessary for the STEP fuel cycle to ensure unfailing integrity over a variety of low-temperature regimes (15-80 K) and enable effective long-term fusion operation.
When more than 50 business representatives attended the STEP Cryogenics Engagement Workshop last month at the Culham Science Centre in person and virtually, such low-temperature technology and applications were very much front and centre. With the UKAEA team looking to draw on the collective knowledge of specialised manufacturers and academia to lay the groundwork for the development roadmap for the project's cryogenic infrastructure, the gathering marked the acceleration of STEP's early-stage dialogue with the UK cryogenics community. Together with industry partners must decide what areas of technological advancement in cryogenics should be prioritised and investigate potential leaders for these advancements.
According to Chris Waldon, STEP's Deputy Director and Chief Engineer, the objectives are to expose STEP to the cryogenics community, explain the program's significance for future energy production, and detail the obstacles in terms of cryogenic refrigeration. Together with industry partners, it will decide where technological advancements in cryogenics should be focused and investigate potential leaders for these advancements.
It is accurate to note that not all of those low-temperature technologies have been chosen and yet given the fact that there is still considerable work to be done about the specifics of the STEP fuel cycle (nor calculations undertaken for the expected cryogen usage and estimated power loads). However, several important cryogenics needs are already set. To support several essential STEP components, however, they still lack the size and power efficiency of cryogenic technology.
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