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Optimizing the cost of the STEP programme.

Hanni Lux1, Chris Brown1, Matthew Butcher1

  • 1UKAEA (United Kingdom Atomic Energy Authority), Culham Campus , Abingdon, Oxfordshire OX14 3DB, UK.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|August 26, 2024
PubMed
Summary

The Spherical Tokamak for Energy Production (STEP) programme integrates cost-consciousness early in its design. This approach aims to reduce long-term expenses and avoid historical cost overruns in major projects.

Keywords:
STEPcost optimizationcostsfusion power plants

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Area of Science:

  • Fusion energy research
  • Nuclear engineering
  • Advanced reactor design

Background:

  • The Spherical Tokamak for Energy Production (STEP) programme is a global initiative for fusion power.
  • Major infrastructure projects often face cost complacency.
  • Early-stage design is critical for influencing whole-life cycle costs.

Purpose of the Study:

  • To embed cost-consciousness into the early design phases of the STEP programme.
  • To inform design decisions with cost considerations.
  • To drive long-term cost reductions and enhance cost-effectiveness.

Main Methods:

  • Utilizing appropriate estimating methods for early-stage designs.
  • Incorporating lessons learned from other industries.
  • Conducting whole life cycle cost analysis at the conceptual design stage.
  • Identifying and analyzing major cost drivers.

Main Results:

  • A cost-conscious design approach has been embedded from the early phases of the STEP programme.
  • Efforts are focused on understanding major cost drivers.
  • Actions are being taken to optimize the cost-effectiveness of the STEP design.
  • While the overall cost estimate is immature, significant progress in cost understanding has been made.

Conclusions:

  • Early and continuous focus on cost is crucial for the success of large-scale projects like STEP.
  • Integrating cost analysis into the conceptual design phase significantly impacts long-term economic viability.
  • The STEP programme's proactive cost management strategy aims to deliver a cost-effective fusion power plant.