RELAP5-3D Development Intern - Summer 2027

Idaho National Laboratory•Idaho Falls, ID
•$27 - $32•Onsite

About The Position

Idaho National Laboratory is seeking an intern to join its Reactor Systems and Heat Transport team. The intern will contribute to developing and implementing computational methods to model tritium transport in fusion energy systems using the RELAP5-3D code. Work includes prototype development in Python, production-level coding in Fortran, and support for theoretical research underlying the modeling approaches. The internship provides hands-on experience in nuclear engineering, computational methods, and fusion technology. The team works a 9x80 schedule onsite at the Idaho Falls campus. The start date and internship duration vary based on the project and student availability. The intern may be eligible for course credit.

Requirements

  • Be enrolled full time in an undergraduate degree program majoring in nuclear engineering, mechanical engineering, chemical engineering, or physics.
  • Have a minimum overall GPA of 3.0.
  • Be authorized to work in the U.S., including through CPT or OPT.
  • Provide a current resume or CV, unofficial transcripts covering current and completed degree programs, and a current class schedule with number of credits.

Nice To Haves

  • Experience with RELAP5-3D analysis and code development.
  • Fortran programming experience.
  • Python programming experience.

Responsibilities

  • Contribute to the development and implementation of computational methods for modeling tritium transport using RELAP5-3D.
  • Develop prototypes in Python and contribute production-level code in Fortran.
  • Support theoretical research underlying the modeling approaches.

Benefits

  • Paid holiday time off.
  • Travel reimbursement may be available for eligible interns.
  • May be eligible for course credit.
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