Radiation Shielding Engineer

Location: Milton Park, Abingdon
Salary: Competitive
Job type: Permanent

The role

The commercialisation of fusion requires that a number of fascinating design challenges are met. One of these is radiation shielding. The size and performance of a spherical tokamak is strongly dependent on reducing the thickness of the shield that protect the superconducting coils from the 14.1MeV fusion neutrons and gamma rays. Provision of a bio-shield is also essential. We are looking for a radiation shielding engineer to play a key part in solving some of these challenges by applying sound physics and engineering judgement to develop shielding designs which meet the design requirements.


  • Assist in the development of 3D radiation transport models of prototype Spherical Tokamaks
  • Produce neutron and gamma radiation calculation results (including heat and dose deposition and fluence spectra) both internal and external to the Tokamak geometry
  • Propose and perform validation and verification activities on radiation transport models
  • Advance the maturity of shielding design solutions from initial conceptualisation through to detailed design
  • Present technical information relating to shield design performance to both expert and non-expert audiences
  • Interface and collaborate with a variety of in-house and external resources

Selection criteria

  • Experienced user of MCNP as a radiation transport code
  • Experienced user of activation/transmutation codes, primarily FISPACT but alternatively ORIGEN or similar.
  • Experience in nuclear fusion technology and the principles of Tokamak design
  • In-depth knowledge of radiation shielding and neutronics
  • Knowledge of techniques on how to provide assurance of radiation modelling results through computational and experimental validation and verification
  • An ability to communicate effectively to peers and management
  • A proven track record of solving complex problems in a rigorous, organised fashion through effective planning and review
  • Computationally competent in the ability to use radiation transport software efficiently as well as preparing effective analytical results through word processing and other software tools
  • Highly motivated to deliver against challenging objectives in a compressed timescale
  • A proactive and self-reliant approach to work with minimal supervision
  • Experience of working well in a team of scientists and/or engineers.

Desirable selection criteria

  • Experience and knowledge of other radiation transport methodologies, including deterministic, Monte Carlo and point kernel techniques
  • Knowledge of the effects of radiation on materials and Electronic, Electrical and Electro-mechanical (EEE) devices
  • Experience in regulatory interaction, including ALARP justifications
  • A PhD or MSc (or equivalent) in Nuclear Fusion, or a related subject
  • Professionally recognised qualifications such as Chartered Engineer or Chartered Physicist, or international equivalents
  • Understanding and awareness of intellectual property.


  • 25 days holiday, pro rata (plus bank holidays)
  • Company pension scheme
  • Eligible for company share option scheme after 1 years’ service
  • Company bonus scheme, discretionary, dependant on performance
  • Private medical insurance after 3 months service

Please note: Only candidates with the relevant skills and experience will be contacted regarding this position.  If you do not hear back from us within 10 days of submitting, your application then unfortunately you have been unsuccessful.  However, we may contact you in the future to discuss other opportunities.

No terminology in the advert or job description is intended to discriminate on the grounds of a person’s gender, marital status, race, religion, colour, age, disability or sexual orientation.  Every candidate will be assessed only in accordance with their merits, qualifications and abilities to perform the duties of the job.

How to apply

Please submit your CV with a covering letter detailing your experience to careers@tokamakenergy.co.uk

Important information for candidates

Pre-employment screening

Please note that the appointment of the successful candidate will be subject to standard pre-employment screening, as applicable to the post. This will include right-to-work, proof of identity and references.

Data Privacy

Please note that any personal data submitted to Tokamak Energy as part of the job application process will be processed in accordance with the GDPR and related UK data protection legislation, for more information regarding GDPR please see:  https://www.gov.uk/government/publications/guide-to-the-general-data-protection-regulation

Equality of Opportunity

Entry into employment with the Tokamak Energy and progression within employment will be determined only by personal merit and the application of criteria which are related to the duties of each post and the relevant salary structure. In all cases, ability to perform the job will be the primary consideration. No applicant or member of staff shall be discriminated against because of age, disability, gender reassignment, marriage or civil partnership, pregnancy or maternity, race, religion or belief, sex, or sexual orientation.


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