Work

Innovation dynamics and technological maturity in the fusion sector: An assessment of fusion projects

Year: 2026

Type: article

Abstract: Nuclear fusion is envisioned for near-term energy generation deployment, with projected timelines for commercial deployment of fusion expected before the 2030s. We adopt a multiple-case study design to compare innovation dynamics of large-scale fusion public research organizations and privately financed new ventures. We design a novel framework that evaluates fusion projects across the most common reactor types and derives the trajectories of technological and economic maturity. The results reveal a pronounced systemic asymmetry. Publicly funded institutions represent most advanced technological efforts, having established their scientific foundations through decades of incremental and iterative research. Their levels of technological and economic maturity are relatively aligned but they remain in the early phases of innovation. In contrast, private actors pursue a leapfrogging strategy, aiming to transition directly from basic research to commercialization, bypassing the incremental validation stages. Economic progress typical of the commercialization phase is being established, including multi-billion-dollar valuations and power purchase agreements. However, this economic maturity is decoupled from equivalent technological progress. Rather than emerging from validated achievements, it is propelled by projected outcomes that circumvent the protracted and risk-intensive validation processes. While fusion energy is frequently portrayed as being on the verge of commercialization, this analysis shows that no project fulfils the technical and economic criteria necessary to demonstrate a functioning reactor for energy generation. These findings challenge dominant narratives and underscore the systemic risk of building political decisions on unproven technological foundations, highlighting the need for integrated, evidence-based strategies to guide policy and investments.

Source: Energy Strategy Reviews

DOI: 10.1016/j.esr.2026.102130

Authors: Charlotte Dering, Alexander Wimmers, Christian von Hirschhausen

Institutions: Technische Universität Berlin, German Institute for Economic Research

Language: English

Topic: Technology Assessment and Management

Subfield: Safety, Risk, Reliability and Quality

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $4,180