The Nuclear Science and Engineering Division at KTH Royal Institute of Technology is seeking a postdoctoral researcher to join the nuclear fuel materials team in Stockholm, Sweden. The successful candidate will lead research on the thermal stability and pellet-cladding mechanical and chemical interaction of burnup simulated doped UO2 fuel (ADOPTTM SIMFUEL), with a particular focus on Cr2O3 and Al2O3 doping. This project is supported by the Swedish Radiation Safety Authority and involves collaboration with Westinghouse and Chalmers University of Technology. The research will utilize both experimental and computational methods to evaluate the effects of fission products on the thermal and mechanical properties of nuclear fuel, as well as the pellet cladding mechanical and chemical interactions (PCMI and PCCI). The position is full-time, for up to two years, and offers a monthly salary. Applicants must have a PhD in Nuclear Engineering, Materials Science, Engineering Mechanics, or a closely related field, with the degree completed by the time of employment. Preferred candidates will have obtained their PhD within the last three years and possess hands-on experience in laboratory work related to sintering, powder metallurgy, and characterization techniques, as well as expertise in mesoscale and multiphysics finite element modelling. Strong communication skills, teamwork, independence, motivation, and dedication to research are essential, and teaching experience is an advantage. The position may require security clearance under Swedish law. KTH offers a dynamic and creative research environment, with a commitment to equality, diversity, and attractive working conditions. Applications must be submitted through KTH's recruitment system and include a CV, diplomas and grades, translations if necessary, a brief research statement, and contact details for 2-3 references. The deadline for applications is November 26, 2025.

KTH Royal Institute of Technology in Stockholm, Sweden, invites applications for a doctoral student position in spectral computed tomography, focusing on deep-learning-based image reconstruction and physics modeling. This project is at the cutting edge of medical x-ray imaging, leveraging photon-counting spectral computed tomography to enhance diagnostic quality. The research will involve developing new methods for data processing and image reconstruction using energy-sensitive x-ray detectors, with a strong emphasis on machine learning and experimental validation. The work is conducted in close collaboration with industry and healthcare partners, providing a dynamic and impactful research environment. The successful candidate will join a vibrant research group at KTH, working under the supervision of Assistant Professor Mats Persson, with additional guidance from Professors Pär Olsson and Mattias Blennow. The project integrates physics, biomedical engineering, and advanced computational techniques, offering opportunities to contribute to both fundamental research and practical applications in medical imaging. Eligibility requirements include a completed second cycle degree (such as a master's) or equivalent, with at least 60 second-cycle credits in physics or a closely related field. Candidates must demonstrate proficiency in English (equivalent to English B/6) and possess a strong academic background in physics and mathematics. Experience in deep learning, medical image reconstruction, numerical programming, and effective communication in English are highly desirable. Selection will also consider personal attributes such as independence, collaboration skills, professionalism, and analytical ability. The position offers full-time employment for up to four years, with a monthly salary according to KTH’s doctoral student salary agreement and access to comprehensive employee benefits. The research environment at KTH is creative and international, with a commitment to equality, diversity, and sustainability. The successful applicant will have opportunities for professional growth, networking, and participation in educational and administrative activities (up to 20% of the role). Applications must be submitted via KTH’s recruitment system by January 2, 2026. Required documents include a CV, application letter outlining research interests and goals, certified copies of diplomas and grades, proof of English proficiency, and representative publications or technical reports. For further information, contact Assistant Professor Mats Persson ([email protected]), Professor Pär Olsson ([email protected]), or Professor Mattias Blennow ([email protected]). This is an excellent opportunity for motivated candidates to contribute to the advancement of medical imaging technology and join a leading technical university in Sweden. For more details and to apply, visit the official application link.

This doctoral position at KTH Royal Institute of Technology offers an exciting opportunity to contribute to the advancement of severe accident management strategies in Nordic boiling water reactor (BWR) plants. The project focuses on understanding and mitigating the risks associated with corium melt release from the reactor vessel, particularly the fragmentation of melt in deep water pools and the formation of coolable corium debris beds. A key concern is the potential for energetic interactions between hot corium and water coolant, which could compromise containment integrity. The research aims to develop innovative methods for addressing the most influential sources of uncertainty in severe accident progression, utilizing the ROAAM+ framework for comprehensive risk assessment. As a doctoral student, you will be part of international collaborative projects and work under the supervision of Professor Pavel Kudinov, with additional contact from Professor Pär Olsson. The position is based in Stockholm, Sweden, at KTH, a leading technical university renowned for its commitment to sustainability, equality, and innovation. The research environment is dynamic and creative, offering excellent working conditions and a range of employee benefits. Eligibility requirements include a completed second cycle degree (such as a master's) or at least 240 higher education credits, with a minimum of 60 credits at the second-cycle level, or equivalent qualifications. Proficiency in English (equivalent to English B/6) is mandatory. The selection process emphasizes personal qualities such as goal orientation, perseverance, independence, collaboration skills, and the ability to analyze complex issues. Candidates should have knowledge in nuclear power, fluid dynamics, thermohydraulics, severe accident phenomena, and numerical simulations. Security clearance may be required for certain roles. The position offers full-time employment for up to four years, with a monthly salary according to KTH’s doctoral student salary agreement. Doctoral students may also engage in training and administrative tasks up to 20% of their role. The application process requires submission through KTH's recruitment system, including a CV, application letter, certified copies of diplomas and grades, proof of language proficiency, and representative publications or technical reports. The deadline for applications is January 9, 2026. Join KTH and contribute to shaping the future of nuclear safety and risk management in a supportive and forward-thinking academic environment.

The Nuclear Power Safety (NPS) Division at KTH Royal Institute of Technology in Stockholm, Sweden, is seeking engaged postdoctoral researchers to join a project focused on nuclear power safety, specifically in the areas of in-vessel corium melt retention (IVMR) in small modular reactors (SMRs) of the pressurized water reactor (PWR) type, and ex-vessel melt-coolant interactions and melt spreading. This research is supported by the Swedish Radiation Safety Authority and aims to adapt and further develop conventional in-vessel retention (IVR) methodologies, previously used in medium- and large-power PWRs, for application in new SMR designs. The project’s goal is to demonstrate the potential efficiency of the IVMR strategy, which could significantly enhance SMR safety by preserving the integrity of the reactor pressure vessel, a critical safety barrier. The position offers the opportunity to work at a leading technical university known for its commitment to sustainability, innovation, and international collaboration. Researchers will engage in both computational and experimental work in well-equipped laboratories, studying novel SMR concepts and collaborating with national and international organizations at the forefront of nuclear reactor safety research. The working environment is creative, dynamic, and supportive, with guidance available for relocation and settling in Sweden. Applicants must have a doctoral degree (or equivalent foreign degree) in Nuclear Engineering, Nuclear Power Safety, Engineering Mechanics, or a related field, with substantial experience in reactor thermal hydraulics, severe accident research, and safety analyses. Preferred candidates will have completed their PhD within the last three years, possess experience with thermal hydraulics or severe accident codes, and have hands-on laboratory experience. Strong communication, teamwork, and independent research skills are essential, as is a demonstrated motivation and dedication to research. Teaching experience and awareness of diversity and equal opportunity issues, particularly gender equality, are considered advantages. The appointment is full-time, temporary, and limited to a maximum of two years, with a monthly salary. The position is intended as a first career step after completing a dissertation. Security clearance may be required for certain roles, in accordance with Swedish law. To apply, candidates must submit a complete application through KTH’s recruitment system, including a CV, copies of diplomas and grades (with translations if necessary), a brief research statement (maximum two pages), and contact details for 2-3 referees. The application deadline is November 17, 2025. For further information, contact Sevostian Bechta, Pär Olsson, Weimin Ma, or Andrei Komlev at the provided email addresses.

The Division of Nuclear Power Safety (NPS) at KTH Royal Institute of Technology is seeking two motivated postdoctoral researchers to advance the field of nuclear safety. The research projects focus on (i) in-vessel melt retention (IVMR) in small modular reactors (SMR) of the pressurized water reactor (PWR) type, and (ii) melt-coolant interactions and melt spreading phenomena. These projects are supported by the Swedish Radiation Safety Authority (Strålsäkerhetsmyndigheten), ensuring a strong link to national and international safety research efforts. The IVMR research aims to adapt conventional methodologies developed for medium- and high-power PWRs to new SMR designs, with the goal of demonstrating the effectiveness of IVMR strategies in maintaining reactor pressure vessel integrity—a critical safety barrier. The expected outcomes will contribute to improved safety performance in next-generation nuclear reactors. As a postdoctoral researcher, you will join a leading technical university committed to knowledge creation for a sustainable future. The position offers a dynamic, international, and creative environment, with opportunities for both computational and experimental research in well-equipped laboratories. You will collaborate with top organizations in nuclear safety research, both nationally and internationally. Eligibility and Requirements: Candidates must hold a doctoral degree (PhD) or equivalent in nuclear engineering, nuclear safety, technical mechanics, or a closely related discipline, completed within the last three years. Extensive experience in reactor thermohydraulics, severe accident research, and safety analysis is required. Skills in computational codes for thermohydraulics and severe accident scenarios, as well as hands-on laboratory experience, are highly valued. Strong communication, teamwork, and independent work abilities are essential. Motivation and commitment to research, as well as experience in teaching and awareness of diversity and equality issues, are considered assets. Proficiency in English or Swedish is required for documentation and communication. Funding and Employment: The position is a full-time, fixed-term postdoctoral appointment for up to two years, with a monthly salary. Funding is provided by Strålsäkerhetsmyndigheten. Employment is subject to security clearance if required by the university. Application Process: Applications must be submitted via the KTH recruitment system. Required documents include a CV, degree certificates and transcripts, a brief research statement (max 2 pages), and contact details for 2-3 referees. All documents should be in English or Swedish. The deadline for applications is December 21, 2025 (midnight CET). KTH is committed to equality, diversity, and good working conditions. Join us to contribute to the future of nuclear safety research in a vibrant academic setting.