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Computational Nuclear Engineer - Assistant R&D Staff Member

Date: May 31, 2021

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 4987 

Description of job (as it will be advertised): Assistant R&D Staff Member- Computational Nuclear Engineer 



Oak Ridge National Laboratory (ORNL) is the largest US Department of Energy science and energy laboratory, conducting basic and applied research to deliver transformative solutions to compelling problems in energy and security. Our diverse capabilities span a broad range of scientific and engineering disciplines, enabling the laboratory to explore fundamental science challenges and to conduct the research needed to accelerate the delivery of solutions to the marketplace.  


We are looking for highly motivated applicants with interest in research and development (R&D) for reduced-order nuclear engineering methods and software development. We have an opening for an entry-level researcher in the Power Reactor Modeling (PRM) Group within the Nuclear Energy and Fuel Cycle Division (NEFCD), Fusion and Fission Energy Directorate. The RMP Group develops and applies state-of-the-art modeling and simulation capabilities for lattice physics, reactor core, spent fuel, and fuel cycle applications through leadership in the development of SCALE and Virtual Environment for Reactor Applications (VERA) and in collaboration with industry, national laboratories, and university researchers.     


Job Duties and Responsibilities: 

  • Application-driven methods development for radiation transport, neutronics, and coupled multiphysics for light-water and advanced reactor applications 
  • Design, optimization, and performance analysis of light-water and advanced reactor performance using VERA and SCALE
  • Collaboration with nuclear industry professionals on the effective use of VERA or SCALE for commercial applications
  • Confirmatory analysis assessments to enable the efficient regulatory review of reactor/fuel concepts and operational changes at nuclear power plants for the US Nuclear Regulatory Commission (NRC)
  • Fuel cycle analysis to evaluate the financial and safety impact of various reactor/fuel concepts or optimization provided using advanced reactor modeling software
  • Individual and collaborative R&D for specific challenges and communication of the technical aspects of the work performed through publications and presentations 
  • Effective interaction with technical peers, program managers, and sponsors domestically and internationally to meet the requirements of projects within scope, schedule, and budget.
  • Development of leadership skills through contributions to organizational goals and through mentoring of summer interns


Basic Qualification 

  • This position requires a PhD in nuclear engineering, computer science, or a relevant field
  • Knowledge of computational nuclear R&D as demonstrated through education and associated publications is required 
  • Excellent interpersonal skills are required, including verbal, presentation, and writing skills 
  • This position requires access to technology that is subject to export control requirements
  • Successful candidates must be qualified for such access without an export control license


Preferred Qualifications 

  • PhD in nuclear engineering or computational science with a dissertation related to reactor analysis
  • Experience developing collaborative software with a computational nuclear analysis code suite
  • Familiarity with Monte Carlo algorithms including use and deployment on advanced HPC architectures
  • Familiarity with a wide range of reactor systems and concepts 
  • Familiarity with modern software development practices such as unit testing and revision control, and the ability to work with C++, FORTRAN, and scripting languages 
  • Capability to understand and interpret reactor and nuclear system operational and fuel cycle performance 
  • Working knowledge of neutronics and one or more complementary technical areas such as thermal-hydraulics, isotopic transmutation, nuclear data/physics, clad-coolant or salt chemistry, or thermo-mechanical fuel performance. 



This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or hired.

We accept Word (.doc, .docx), Adobe (unsecured .pdf), Rich Text Format (.rtf), and HTML (.htm, .html) up to 5MB in size. Resumes from third party vendors will not be accepted; these resumes will be deleted and the candidates submitted will not be considered for employment.

If you have trouble applying for a position, please email

ORNL is an equal opportunity employer. All qualified applicants, including individuals with disabilities and protected veterans, are encouraged to apply.  UT-Battelle is an E-Verify employer.

Nearest Major Market: Knoxville