Oxford Sigma has delivered multiple projects within the following sectors: nuclear, fusion, space, big science, and investment. These projects have been with national laboratories, private companies, governments, and universities.

Below are typical areas that we provide services in, as well as completed projects, and framework positions that we hold.


  • Materials development for extreme environments
  • Materials selection
  • Radiation damage of materials
  • Irradiation experiment techniques
  • Fusion technology assessment
  • Fusion In-Vessel Components (IVC) technology development
  • Fusion Safety analysis 
  • Plasma modelling
  • Assessment of radiological hazards and waste
  • Neutronics
  • Nuclear reactor core design
  • Application of nuclear design codes (e.g. ASME BPVC)
  • Sodium, lead, lead-bismuth, lithium, lithium-lead, helium, and molten-salt coolants
  • R&D strategy development
  • Nuclear regulatory compliance and strategy
  • Supply chain analysis
  • Commercialisation support for fusion energy
  • Investment guidance for fusion and fission energy

Example Completed Projects:

Fusion Materials Selection for Tokamak Reactors

Oxford Sigma delivered fusion materials strategy, development, and design for a private fusion company’s tokamak reactor design. This project focused on materials development to withstand 14.1 MeV neutrons and plasma exposure, covering the structural, functional, shielding, and breeding materials of the reactor.

Fusion Central Column Tritium Breeding

Oxford Sigma simulated novel in-board tritium breeding and superior radiation shielding designs to minimise the neutron and gamma fluxes at the central solenoid of a tokamak reactor. The company deployed NeutronicBEAST to rapidly prototype tens of thousands of designs to find the optimal solution(s).

Molten Salt Reactor Core Engineering

Oxford Sigma supported a private company’s molten salt reactor core design by analysing fuel facing materials, reactor vessels, and in-core support structures. This work covered analysis of the applicability of nuclear codes and standards, along with understanding the effects of molten salt corrosion and radiation damage of core materials.

Assessment of Fusion Energy for Investment

Oxford Sigma has provided guidance on technological, supply chain, and commercial challenges of fusion energy to investment and energy firms. The outcome de-risked and identified opportunities where strategic investment could provide maximum effectiveness in the industry.


Oxford Sigma has sub-contract positions on the following frameworks:
  • UK Atomic Energy Authority Engineering Design Services Framework
  • UK Atomic Energy Authority Tritium Engineering Framework
  • Office for Nuclear Regulation Technical Support Framework
  • European Spallation Source Mechanical Engineering Framework
To find out more about the services that we offer, please contact us via email at [email protected].