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Relap5 Jobs (NOW HIRING)

System One

Senior Safety Methods Engineer

Bellevue, WA · Remote

$37 - $74/hr

Experience with thermal hydraulic analysis tools such as RELAP5 3D, GOTHIC, SAS, or equivalent. * Proven experience in developing or improving analysis methods, including numerical schemes and ...

Protingent

Safety Analysis Engineer

Bellevue, WA · On-site

$84 - $135/hr

Significant experience with safety analysis codes such as SAS4A/SASSYS-1, GOTHIC, RELAP5, TRACE, MELCOR, MACCS, RADTRAD or equivalent. * Familiarity with nuclear design, regulatory requirements, and ...

TerraPower LLC.

Senior Safety Methods Engineer

Bellevue, WA · On-site

$117K - $162K/yr

Experience performing system-level thermal hydraulic analyses using tools such as RELAP5 3D, GOTHIC, SAS, or equivalent, with the ability to extend or tailor modeling approaches within these ...

TerraPower LLC.

Senior Safety Methods Engineer

Bellevue, WA · On-site

$117K - $162K/yr

Experience performing system-level thermal hydraulic analyses using tools such as RELAP5 3D, GOTHIC, SAS, or equivalent, with the ability to extend or tailor modeling approaches within these ...

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Relap5 information

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How much do relap5 jobs pay per hour?

As of Jul 9, 2026, the average hourly pay for relap5 in the United States is $50.17, according to ZipRecruiter salary data. Most workers in this role earn between $39.42 and $60.82 per hour, depending on experience, location, and employer.

What is RELAP5?

RELAP5 is a computer code used for thermal-hydraulic safety analysis of nuclear reactors. It simulates reactor system behavior during normal operation and accident scenarios, requiring knowledge of reactor physics and programming skills. Professionals working with RELAP5 often have backgrounds in nuclear engineering or related fields.

What are the uses of relap?

Relap5 is a thermal-hydraulic simulation software used by engineers to analyze nuclear reactor safety, coolant behavior, and system transients. Professionals in this field utilize Relap5 to perform safety assessments, validate reactor designs, and support research in nuclear engineering. Proficiency in programming and understanding of nuclear systems are often required for effective use.

What are the key skills and qualifications needed to thrive as a RELAP5 Nuclear Safety Analyst, and why are they important?

To thrive as a RELAP5 Nuclear Safety Analyst, you need a solid background in nuclear engineering, thermohydraulics, and reactor safety analysis, usually supported by an engineering degree. Proficiency in using the RELAP5 simulation software, understanding of nuclear regulatory codes, and familiarity with data analysis tools are essential technical requirements. Strong analytical thinking, attention to detail, and effective communication skills help you interpret complex data and collaborate with multidisciplinary teams. These capabilities are vital to ensure accurate safety assessments and compliance with regulatory standards in nuclear power plant operations.

What is the difference between Relap5 vs Relap5?

AspectRelap5Relap5

Since the comparison is between the same job title, there is no difference in skills, credentials, or work environment. Both roles involve using Relap5 software for thermal-hydraulic safety analysis in nuclear engineering, requiring similar certifications and industry experience. Typically, professionals in this role work in nuclear power plants, research facilities, or engineering firms focused on nuclear safety. The primary distinction may lie in specific project focus or experience level, but overall, the roles are equivalent.

Is it hard to find a job as a nuclear engineer?

Finding a job as a nuclear engineer can be competitive, but opportunities are available in power plants, research facilities, and government agencies. Strong technical skills, relevant certifications, and a bachelor's or master's degree in nuclear engineering or related fields improve employment prospects.

What is the highest paying nuclear job?

In the nuclear industry, senior reactor operators, nuclear engineers, and health physics managers tend to have the highest salaries. These roles often require advanced certifications, extensive experience, and specialized knowledge of nuclear systems and safety protocols. Salaries can vary based on location, employer, and level of responsibility but generally exceed $100,000 annually for top positions.
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Relap5 jobs near you
Senior Engineer, Plant Thermal Hydraulics Validation

Senior Engineer, Plant Thermal Hydraulics Validation

Protingent

Bellevue, WA • On-site

$56 - $95/hr

Contractor

Medical, Retirement, PTO

Posted 24 days ago

Job description


Position Title: Senior Engineer, Plant Thermal Hydraulics Validation
Position Description: Protingent Staffing has an exciting contract Senior Engineer, Plant Thermal Hydraulics Validation opportunity.
Job Responsibilities:
  • Support verification, validation, and uncertainty quantification activities for plant scale thermal-hydraulic analysis tools.
  • Perform system-level steady-state and transient thermal-hydraulic simulations to evaluate model behavior, accuracy, and limitations.
  • Interpret and apply experimental data from separate effects and integral test facilities to support model validation and closure of technical gaps.
  • Define validation needs, develop test requirements, and collaborate closely with test engineering teams to ensure alignment between model gaps and experimental programs.
  • Document V&V methodologies, model assumptions, validation results, and uncertainty analyses for internal design processes and regulatory submittals.
  • Collaborate with multidisciplinary teams to support plant design, safety analysis, and licensing workflows.
  • Apply and improve company's SQA and NQA1 modeling quality practices and ensure traceability and configuration control of analysis inputs, models, and results.

Job Qualifications:
  • Degree in Mechanical, Nuclear, Chemical Engineering, or similar field, with a minimum 6+ years of experience for level 10; advanced-degree equivalencies apply.
  • Experience should include system-level thermal hydraulic analysis and code assessment for nuclear or complex energy systems.
  • Demonstrated experience in code assessment, including model-to-test comparison, validation metric development, and uncertainty quantification.
  • Hands on experience working with experimental thermal hydraulic data, including data analysis, uncertainty evaluation, and comparison against system level predictions.
  • Experience with system analysis tools (e.g., RELAP5 3D, TRACE, SAS, or equivalent) applied to plant scale transient and steady-state evaluations.
  • Strong foundation in thermal-fluid and reactor system behavior considerations relevant to advanced reactor designs.
  • Experience with SQA and NQA 1 quality assurance practices for modeling workflows is highly preferred.
  • Strong analytical thinking, clear technical communication, and the ability to manage multiple validation tasks in parallel.

Job Details:
  • Job Type: Contract
  • Pay Rate Range: $56-$95/hr (Pay rates are approved based on candidate location, education and experience)
  • Location: Bellevue, WA or 100% Remote
  • Export control regulations require candidates to be a U.S. Citizen, U.S. Legal Permanent Resident, or of a protected person status.

Benefits Package: Protingent offers competitive salaries, insurance plan options (HDHP plan or POS plan), education/certification reimbursement, pre-tax commuter benefits, Paid Time Off (PTO), and an administered 401k plan.
#TerraPro
About Protingent: Protingent is an Award-Winning provider of top-tier Engineering and IT talent, trusted by companies at the forefront of innovation - from Software and Aerospace to AI, Clean Tech, Medical Devices, and Connected Technologies. We're passionate about making a positive impact by connecting exceptional talent with meaningful opportunities and helping our clients build the future.
Meet Your Recruiter
Abby Hubbard
I joined Protingent in the Spring of 2021 as a sales intern, transitioning to a full-time Technical Recruiter after graduating from the University of Washington in June 2021. Initially, I focused on supporting our spaceflight clients, later expanding to industries such as sustainable energy and nuclear power. While I've broadened my recruiting scope, I'm still partial to aerospace engineering, especially anything related to propulsion technology.
My recruiting style focuses on individual candidate needs and relationship building. My philosophy is to lead with empathy and integrity. My favorite thing about recruiting is the opportunity to learn something new every day by talking to the most intelligent people/engineers, as well as the potential to impact critical industries at the staffing level.
When I'm not recruiting, I love spending time outdoors - hiking, camping, roller skating, reading in parks, and swimming in Lake Union (when the Seattle weather permits). I also enjoy thrift shops, sewing/up-cycling clothes, and shooting 35mm film.

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