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Postdoc – Nuclear Fuel Performance and Fission Gas Modelling

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Postdoc – Nuclear Fuel Performance and Fission Gas Modelling

Forschungszentrum Jülich GmbH logoForschungszentrum Jülich GmbH
Jülich, Germany
Deadline: 2026-12-22 23:59 (CET)
Posted: Sep 25, 2026

NL Highlights

Develop and apply advanced computational methods using SCIANTIX to simulate the behavior of high burn-up spent nuclear fuel.
Predict the physical-chemical phenomena influencing fission gas release and structural performance by integrating experimental data into models.
Collaborate with project partners and mentor junior researchers while publishing findings in peer-reviewed journals.

Details

Salary & Funding

Classified in pay grade EG 13 of the TVöD-Bund, with a year-end bonus of 75% of a monthly salary and capital-forming benefits.

Duration

3-year position contingent upon project approval

Contact Info

Refer to FAQs or use the contact form for inquiries. Applications cannot be accepted by e-mail.

Eligibility

PhD degree in Nuclear Engineering, Computational Materials Science, Physics, Chemistry, or a closely related discipline
Proven experience in mesoscale or engineering-scale modeling of nuclear fuel materials
Strong knowledge in fission gas behavior and mechanics of high burn-up spent nuclear fuel
Solid scientific programming and data analysis skills (e.g., Python, C++ or Fortran)

Next Steps

1
Submit an online application.
2
Include: Application letter/Cover letter, CV, Transcript of Records, University degree certificate/Proof of professional qualification, Professional Training and certificates, Employment references/Work certificates, Letter of Reference (if already existing), Additional relevant documents.

Opportunity Overview

Your Job:

  • Apply and develop state-of-the-art computational investigative methods, specifically utilizing the SCIANTIX code, to simulate the behavior of high burn-up spent nuclear fuel during extended interim storage
  • Predictive Analysis: Model and evaluate physical-chemical phenomena such as diffusion, resolution, and bubble evolution to deliver enhanced predictions of fission gas release (FGR) and structural engineering performance in spent fuel
  • Bridge the gap between theory and experiment by integrating microstructural and experimental data into computational models to validate predictive capabilities
  • Assist in coupling mesoscale fission gas behavior models with macroscopic fuel performance codes such as BISON and TRANSURANUS to assess the long-term integrity of storage systems
  • Actively collaborate and exchange benchmarks with the "Atlas" project partners, including participating in collaborative research exchanges
  • Support and mentor PhD and Master's level students in implementing modelling codes and analysis
  • Analyze, document, and present data at international conferences and publish findings in high-impact, peer-reviewed scientific journals

Your Profile:

  • Master's degree with subsequent PhD degree in Nuclear Engineering, Computational Materials Science, Physics, Chemistry, or a closely related discipline
  • Proven experience in mesoscale or engineering-scale modeling of nuclear fuel materials. Familiarity with physics-based rate theory, mechanistic modeling, or fuel performance codes such as SCIANTIX particularly but also TRANSURANUS or BISON is highly desirable
  • Strong foundational knowledge in fission gas behavior (including diffusion, bubble nucleation, resolution, and microstructural evolution) and the mechanics of high burn-up spent nuclear fuel under extended interim storage conditions
  • Solid scientific programming and data analysis skills (e.g., Python, C++ or Fortran) for script development, code execution, and parsing complex data sets
  • Ability to independently design, execute, and troubleshoot your research output while aligning results with the overarching goals of the Atlas project
  • Assist in the co-supervision and mentoring of PhD candidates, master s students, or technical staff working within the research group whilst performing an active leadership role in the Atlas project
  • Excellent English communication and scientific writing skills (at least B2 level according to the CEFR), with a demonstrated track record of publishing in peer-reviewed journals

Our Benefits for You:

We work on highly topical, socially relevant issues and offer you the opportunity to actively shape change! You can expect a wide range of opportunities:

Research Environment:

Research infrastructure:

  • Access to state-of-the-art computational infrastructure

Mentoring & Expertise:

  • Mentoring and training by global experts in nuclear fuel materials chemistry and condensed matter physics

Knowledge & further training:

  • Support for further career growth, with the flexibility to develop your own independent scientific ideas within the project's scope

International networking:

  • Confirmed funded opportunities to attend international conferences and training events

Vacation:

  • You will receive 30 days of vacation plus additional days off (e.g., between Christmas and New Year's)

Health & well-being:

  • Your health is important to us. You can look forward to a comprehensive occupational health management program with a wide range of offerings e.g., a beach volleyball court, running groups, yoga classes, and much more. In addition, our company medical service and an experienced social counseling team are available to assist you on site

Support for international employees:

  • Our International Advisory Service makes it easier for international employees to get started

Career Center:

Successful start:

  • It is important to us that you quickly settle into the team and are given structured training for your tasks. We also support you from the very beginning and make your start easier with our Welcome Days and Welcome Guide

Fair remuneration:

  • Depending on your existing qualifications and the tasks assigned to you, you will be classified in pay grade EG 13 of the TV D-Bund (Collective Agreement for the Public Service). All information on the TV D-Bund collective agreement can be found on the BMI website. The monthly salaries in euros can be found on page 69 ff. of the PDF download

Additional benefits:

  • Benefit from attractive additional services such as a company pension scheme with employer contribution. In addition to the basic salary, there is an additional year-end bonus under the collective pay agreement amounting to 75% of a monthly salary, as well as capital-forming benefits

Fixed-term:

  • 3-year position contingent upon project approval

In addition to exciting tasks and a collegial working environment, we offer you much more: https://go.fzj.de/benefits

We welcome applications from people with diverse backgrounds, e.g. in terms of age, gender, disability, sexual orientation/ identity, and social, ethnic and religious origin. A diverse and inclusive working environment with equal opportunities in which everyone can realize their potential is important to us.

The following links provide further information on diversity and equal opportunities: https://go.fzj.de/equality and on specific support options: https://go.fzj.de/womens-job-journey

The position will be published until it is successfully filled. We look forward to receiving your online application.

Contact:

If your questions have not yet been answered via our FAQs, please send us a message via our contact form.

Please note that for technical reasons we cannot accept applications by e-mail.

www.fz-juelich.de