Astral Systems

Based in Bristol, UK, Astral Systems is a deep-tech company established in 2021 by CEO Talmon Firestone and CTO Dr. Tom Wallace-Smith. The founding was a synthesis of Dr. Wallace-Smith's theoretical insights into fusion, inspired by NASA's work on lattice confinement fusion, and Firestone's extensive commercial experience in the nuclear, space, and defense sectors. Dr. Wallace-Smith’s background includes hands-on reactor design at Rolls-Royce Submarines, while Firestone was previously a partner at the first company to commercialize a fusion reactor in the mid-2000s, NSD-Fusion GmbH.

The company is commercializing a proprietary Multi-State Fusion (MSF) reactor, a compact and scalable neutron source. This technology is an advancement on NASA's lattice confinement fusion (LCF) research, which allows for fusion reactions to occur in a metal solid at ambient temperatures, achieving fuel densities vastly higher than traditional plasma-based methods. Astral Systems' MSF design produces fusion reactions in both plasma and the solid-state lattice simultaneously, which significantly increases the fusion rate. The business generates revenue through research contracts, having already earned over €2.3 million, and by selling its reactors. A February 2025 funding round led by Speedinvest and Playfair secured over €5.3 million to scale production and deliver reactors to customers.

Astral Systems' primary focus is on addressing the critical global shortage of medical isotopes, which are essential for cancer diagnosis and treatment. The current supply depends on a few aging nuclear fission reactors, most of which are scheduled to close by 2030, creating significant vulnerability in the healthcare supply chain. The company's compact reactors offer a decentralized solution, enabling on-demand, local production of isotopes for hospitals and research facilities. This model aims to create a more resilient supply chain, reduce costs, and increase access to advanced medical procedures. Beyond healthcare, the technology has potential applications in hybrid fusion-fission energy, nuclear waste transmutation, and space exploration.

Keywords: Multi-State Fusion, compact neutron source, medical isotopes, lattice confinement fusion, nuclear medicine, deep tech, fusion energy, cancer treatment, neutron generator, decentralized production, Talmon Firestone, Tom Wallace-Smith, Bristol startup, radioisotope production, NASA fusion, nuclear technology, healthcare supply chain, fusion reactor, materials research, radiation therapy