The KTH Royal Institute of Technology invites applications for a doctoral student position in Nuclear Power Safety, located in Stockholm, Sweden. This opportunity is situated within the Division of Nuclear Science and Engineering (NSE), specifically the Nuclear Power Safety group, which conducts advanced research on accident phenomena relevant to both current and future nuclear reactors. The group is internationally recognized for its work in safety analysis, including design basis and severe accident analysis for nuclear power plants. The doctoral project focuses on frontier research regarding melt-structure interactions during severe accidents in light water reactors, with an emphasis on ex-vessel corium risk analysis. The successful candidate will perform both experimental and analytical studies, as well as safety analyses using simulation tools such as U.S. NRC codes. The research is supported by funding from the APRI-12 program and SSM projects, ensuring a fully funded position with a monthly salary according to KTH’s doctoral student salary agreement. Supervision will be provided by Professor Weimin Ma, with additional contacts including Professor Mattias Blennow and Professor Jens Bardarson. The position offers a creative and dynamic environment, attractive benefits, and the opportunity to contribute to international collaborations in nuclear safety research. Eligibility requires a Master’s degree in nuclear engineering or mechanical engineering, or equivalent academic qualifications (at least 240 higher education credits, including 60 second-cycle credits). Applicants must demonstrate eligibility for utilization of U.S. NRC codes and possess English proficiency equivalent to English B/6. Selection criteria include the ability to work independently and collaboratively, professional approach, analytical skills, and perseverance. Personal skills are highly valued. The position is full-time and temporary, with employment initially for one year and possible renewal up to four years for completion of the doctoral degree. Doctoral students are entitled to a workplace with many employee benefits. Security clearance may be required for certain roles, in accordance with Swedish law. To apply, candidates must submit a CV, application letter (max 2 pages), certified copies of diplomas and grades, proof of language requirements, and representative publications or technical reports. Applications must be submitted via KTH’s recruitment system by the deadline of March 16, 2026. For further information, contact Professor Weimin Ma ([email protected]), Professor Mattias Blennow (emb@kt), or Professor Jens Bardarson ([email protected]). KTH is committed to equality, diversity, and equal opportunities, and offers a supportive environment for doctoral students. Join a leading international technical university and contribute to the advancement of sustainable society through research, education, and innovation.

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.