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Principal Nuclear Safety Analyst

Job in Idaho Falls, Bonneville County, Idaho, 83405, USA
Listing for: Information Systems Laboratories
Full Time, Seasonal/Temporary position
Listed on 2026-08-14
Job specializations:
  • Engineering
    Safety Engineer, Systems Engineer, Environmental Engineer, Research Scientist
Job Description & How to Apply Below

Principal Engineer

Information Systems Laboratories, Inc. (ISL) is seeking a Principal Engineer for a full-time position in the Nuclear Safety Analysis team. ISL provides comprehensive support to the nuclear and space industries such as nuclear safety analysis, complex modeling & simulation, nuclear software development through the entire software lifecycle, regulatory framework and procedures development, waste management tracking, risk management, and cyber security.

The applicant will work alongside safety analysis experts performing a mix of research and development and customer contract work. Customers are generally advanced reactor and fuel vendors requiring ISL's unique safety analysis expertise to meet licensing requirements of the U.S. NRC or DOE. ISL has a culture of building from fundamentals to solve complicated engineering problems in the nuclear industry, including modeling and simulation of system and core thermal-hydraulics (RELAP5-3D, TRACE, VIPRE-01), nuclear physics (MCNP, SCALE, PARCS), fuel performance (FAST), radiological consequences (RADTRAD), etc.

To this end work tasks may include hazard analysis, safety basis event identification, model and simulation development, transient analyses, and safety basis documentation for existing LWR, SMR, and advance reactor designs. This position includes writing technical reports and white papers, creating presentations, and other like tasks needed to communicate ideas, problems, and solutions. The position offers a unique opportunity to advance the state-of-the-art, publish research, present at conferences and workshops, and develop industry contacts and relationships.

Requirements:

  • A degree (B.S or M.S.) in Nuclear or Mechanical Engineering;
  • 15-20 years of experience in nuclear;
  • Prior safety analysis and/or reactor design experience;
  • A self-starter who: works well within a team or independently, has a demonstrated ability to solve complex problems, can adapt to changing situations, and has the drive to verify results and know they make sense;
  • Experience with fluid dynamics, heat transfer, nuclear physics, and/or structural mechanics;
  • Experience with RELAP5-3D or TRACE;
  • Experience with U.S. NRC licensing (NUREGs, Reg. Guides, etc.);
  • Experience with safety basis events, categories, and transient analysis;
  • Familiarity with historic, operating, and advanced nuclear reactors;

Desired

Skills:

  • An understanding of the fundamentals of nuclear physics;
  • Familiarity with nuclear quality assurance (ASME NQA-1)
  • Familiarity with U.S. DOE authorization basis
  • Experience with design basis accident dose analysis
  • Experience with radiation shield design and modeling & simulation
  • Experience with:
    General calculation software such as Mathcad and/or Octave, Nuclear physics codes such as MCNP, SCALE, PARCS, etc., CFD and Multiphysics codes, Solid modeling or CAD, and Basic scripting or light programming skills (Python, Java, etc.)

To apply, please send a resume to Colleen Amoruso.

Job Type: Full Time

Job Location:

Idaho Falls,  remote depending on level of experience

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