Computational Thermal-Hydraulics Engineer

The Reactor Systems and Heat Transport department at Idaho National Laboratory (INL) is seeking a highly motivated Computational Thermal-Hydraulics Engineer to support advanced modeling and simulation efforts for nuclear energy systems at our Idaho Falls, Idaho location. Our team works a 9/80 schedule with every other Friday off.

This position focuses on high-fidelity computational fluid dynamics (CFD), thermal-hydraulics, and verification and validation (V&V) of simulation tools and experimental benchmarks. The successful candidate will contribute to national and international collaborative efforts, supporting the development of next-generation nuclear technologies.

Key Responsibilities:

• Develop and execute CFD models using tools such as STAR-CCM and nekRS for thermal-hydraulic analysis.

• Perform high-fidelity simulations including Large Eddy Simulations (LES) and Direct Numerical Simulations (DNS).

• Conduct benchmarking and validation studies using experimental data from national and international facilities.

• Support verification and validation (V&V) activities for independent analysis and regulatory-grade assessments.

• Analyze and compare simulation results across multiple institutions and tools to identify trends and discrepancies.

• Apply NEAMS tools for thermal-hydraulic modeling and analysis of nuclear systems.

• Model natural convection systems, including radiative heat transfer effects.

• Prepare technical reports, peer-reviewed publications, and presentations for sponsors and conferences.

• Collaborate with multidisciplinary teams including experimentalists, analysts, and software developers.

Minimum Qualifications:

• Bachelor of Science in Nuclear Engineering or directly related engineering degree from an ABET-accredited institution and (2) years of related experience or Master's degree in Nuclear Engineering or closely related field from an ABET-accredited institution.

Preferred Qualifications:

• Ph.D. in Nuclear Engineering or a closely related field from an ABET-accredited institution.

• Hands-on experience with CFD tools such as STAR-CCM and nekRS.

• Knowledge of high-fidelity simulation methods (LES, DNS).

• Experience with V&V methodologies and benchmarking of experimental facilities.

• Familiarity with NEAMS thermal-hydraulic modeling tools.

• Understanding of natural convection and radiative heat transfer in nuclear systems.

• Experience with dry cask storage modeling and re-criticality simulations.

• Proficiency in programming languages such as Python, C , or FORTRAN for data processing and automation.

• Familiarity with high-temperature gas-cooled reactors and advanced reactor concepts.

Physical Requirements:

• While performing the duties of this classification, the employee is frequently required to stand, walk, sit, stoop, kneel, bend, and work in an office and field environment, which may include construction sites. The job requires hand/finger dexterity to keyboard or type, handle materials, manipulate tools, and reach with hands and arms. The job requires operation of job-related equipment and driving a vehicle. The employee must occasionally lift and/or move up to 30 pounds. Sufficient visual acuity and hearing capacity to perform the essential functions and interact with the public is required. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

Job Information:

• The pay range for this position is ($77,628 - $159,228). At Idaho National Laboratory compensation decisions are determined using factors such as education, relevant experience, and other credentials.

Benefits and Relocation

• Medical, Dental, Vision, and Flexible Spending Accounts

• 401(k) with a 4.2% employer contribution and up to 4.8% match
• Paid time off (personal leave)
• Employee Education Program (tuition assistance)
• Comprehensive Relocation Package
• Benefit eligibility subject multiple factors, including employment status and position classification.

At this time, BEA will not sponsor any H1-B visas obtained outside of the United States of America (U.S.A.), including consular visas.

INL is a science-based, applied engineering national laboratory dedicated to supporting the U.S. Department of Energy's mission in nuclear energy research, science, and national defense. With more than 6,300 scientists, researchers, and support staff, the laboratory works with national and international governments, universities and industry partners to change the world's energy future and secure our nation's critical infrastructure.
INL Mission
Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure.

INL Vision
Our vision is to change the world's energy future and secure our nation's critical infrastructure.

Selective Service Requirements
To be eligible for employment at INL males born after December 31, 1959 must have registered with the Selective Service System (SSS). For more information see www.sss.gov.

Equal Employment Opportunity
Idaho National Laboratory (INL) is an Equal Employment Opportunity (EEO) employer. It is the policy of INL to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.

Reasonable Accommodation
We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

Other Information
When applying to positions please provide a resume and answer all questions on the following screens. Applicants, who fail to provide a resume or answer the questions, may be deemed ineligible for consideration.

INL does not accept resumes from third party vendors unsolicited.