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4h ago

MIT Proposes 'Economic Q' Framework to Judge Fusion's Commercial Viability

The model gives investors and designers a ten-parameter way to measure whether a fusion plant can earn more capital than it costs to build and run.

image: ©sakkmesterke | iStock
“It’s challenging to reduce complex scientific and engineering requirements to economic consequences,” Professor Andrew Lo says. “But if we don’t do that, we’re not going to get the funding we need, to achieve the impact we want.”
Representational image of a nuclear fusion energy.

Overview

  • The open-access paper by MIT professors Dennis Whyte and Andrew W. Lo was published Monday and lays out a quantitative framework to judge fusion projects by financial returns as well as physics.
  • The authors define an "economic Q" as the ratio of capital gained to capital expended and say a value greater than 1 is required for basic commercial viability.
  • The framework names ten parameters that span physics, engineering, finance and markets, including power density, conversion efficiency, component durability, plant construction cost and revenue assumptions.
  • The model is technology-agnostic and scalable, meaning it can be applied to different fusion concepts and plant sizes to compare trade-offs in design and spending.
  • The paper reflects growing private investment in fusion and the authors' industry roles, so it is meant to steer investor choices, research priorities and policy while also raising questions about conflicts of interest.