Postdoctoral position in Nuclear Data Uncertainty and Reactor Analysis

Are you interested in working with nuclear data and reactor analysis, with the support of competent and friendly colleagues in an international environment? Are you looking for an employer that invests in sustainable employeeship and offers safe, favourable working conditions? We welcome you to apply for a postdoc position at Uppsala University.

The Department of Physics and Astronomy is located in the Ångström Laboratory and employs nearly 400 people, around 100 of whom are doctoral students. It offers a broad physics curriculum to undergraduate and graduate students, participation in nationally and internationally leading projects for researchers, and opportunities for partnership with industry and various outreach activities. Read more on uu.se/physics.

Uppsala University is seeking a highly motivated Postdoctoral Researcher to join our innovative research team focused on nuclear data evaluation. This project is dedicated to advancing the development of Generation IV reactors, particularly small modular reactors with molten salt or lead-cooled designs.

As a Postdoctoral Researcher, you will play a key role in enhancing the burnup of nuclear fuel and optimizing reactor operations by refining uncertainty propagation methods used in safety margin calculations. Your research will involve programming of a nuclear data evaluation pipeline, as well as models development and assessing uncertainties within nuclear data libraries.

We are looking for a candidate with a strong background in nuclear engineering, physics, or a related field, and extensive experience in uncertainty analysis as well as programming. This position offers a unique opportunity to collaborate with leading international researchers, as part of the role involves being stationed at a partner institution abroad.

Join us at Uppsala University and contribute to the future of nuclear energy while expanding your global research network.

Duties

• Conduct advanced research on uncertainty and covariance calculations in nuclear data libraries.
• Development of a nuclear data evaluation pipeline.
• Apply and refine uncertainty propagation techniques to improve reactor safety margins.
• Collaborate with international research partners and contribute to joint research initiatives.
• Lead and contribute to academic publications, conferences, and knowledge dissemination.

Requirements
PhD degree in nuclear engineering, physics, or a closely related field or a foreign degree equivalent to a PhD degree in nuclear engineering, physics, or a closely related field. The degree needs to be obtained by the time of the decision of employment. Priority will be given to applicants who have completed their degree no more than three years before the deadline for applications.  Due to special circumstances, the degree may have been obtained earlier. The three-year period can be extended due to circumstances such as sick leave, parental leave, duties in labour unions, etc.

Further requirements are:

• Demonstrated expertise in uncertainty analysis and nuclear data.
• Demonstrated proficiency in programming.
• Strong analytical and problem-solving skills.

Additional qualifications

• Good knowledge in mathematics and statistics.
• Good communication skills and a strong collaborative spirit.
• Previous postdoctoral experience or significant research experience in nuclear technology.

About the employment
The employment is a temporary position of 2 years according to central collective agreement. Full time position. Starting date 1 September 2025 or as agreed. Placement: Uppsala

For further information about the position, please contact: Erik Andersson Sundén, erik.andersson-sunden@physics.uu.se, +46 70 363 92 05.

Please submit your application by 6 June 2025, UFV-PA 2025/1496.

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