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Relap5 Jobs (NOW HIRING)

Protingent

Senior Safety Methodology Engineer

Bellevue, WA · On-site

$69 - $115/hr

Develop and document sensitivity studies using RELAP5, SAS, or GOTHIC to demonstrate efficacy of methodology approach. * Develop and document code benchmarking and validation analyses to support code ...

Protingent

Senior Safety V&V Engineer

Bellevue, WA · On-site

$56 - $95/hr

Significant experience with safety analysis software such as RELAP5-3D, TRACE, MELCOR, SAS4A/SASSYS-1, SAM or other nuclear system analysis software. * Familiarity with nuclear design, regulatory ...

Aalo Atomics

System Thermal-Hydraulics Analyst

Austin, TX · On-site

$99 - $121/hr

MSc in Nuclear Engineering or a closely related field. * 5+ years of proven experience performing analyses with system thermal‑hydraulic codes such as RELAP5 / RELAP5‑3D, and/or TRACE. * Strong ...

newcleo

NY · On-site

$90 - $120/hr

RELAP5, CATHARE, ATHLET. * Expertise in CFD is a plus. * Experience with liquid metal reactors is a strong plus. * Strong analytical skills. * Ability to participate in team meetings and give ...

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How much do relap5 jobs pay per hour?

As of Aug 21, 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 are the key skills and qualifications needed to thrive as a RELAP5 nuclear safety analyst?

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.

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Relap5 jobs near you
Infographic showing various Relap5 job openings in the United States as of August 2026, with employment types broken down into 79% Full Time, and 21% Contract. Highlights an 90% Physical, and 10% Remote job distribution, with an average salary of $104,344 per year, or $50.2 per hour.

Plant Integrated Analysis Engineer

System One

Bellevue, WA • Remote

Contractor

Re-posted 4 days ago

Job description

Plant Integrated Analysis Engineer

Location: Bellevue, WA Job Type: Contract Work Model: Hybrid (Primarily Remote) Schedule: 40 hours/week

System One is seeking a highly motivated Plant Integrated Analysis Engineer to support the development of advanced sodium-cooled nuclear reactor technology. This role will focus on plant-level thermal-hydraulic analysis, transient modeling, and control system performance to support reactor design, safety, and operational excellence.

Working as part of a multidisciplinary engineering team, you'll collaborate with safety, instrumentation & controls (I&C), and system design engineers to model, analyze, and validate complex plant systems.

Responsibilities

  • Develop and maintain RELAP5-3D models for steady-state and transient one-dimensional hydraulic network analyses.
  • Perform plant-level thermal-hydraulic analyses for normal operating conditions, upset events, and emergency scenarios.
  • Develop, evaluate, and optimize plant control strategies and component-level control systems.
  • Perform first-principles engineering calculations involving heat transfer, fluid dynamics, and thermodynamics.
  • Analyze plant-wide transients to support operational strategies and reactor design improvements.
  • Conduct multidisciplinary analyses involving sodium, molten salt, and non-condensable fluid systems.
  • Collaborate with system, component, fuel, safety, and I&C engineering teams.
  • Support the development, validation, and improvement of analytical methods and modeling approaches.
  • Prepare technical documentation and communicate analysis results to cross-functional engineering teams.

Required Qualifications

  • Bachelor's degree or higher in Nuclear Engineering, Mechanical Engineering, Electrical Engineering, or a related engineering discipline.
  • Experience using thermal-hydraulic system analysis codes such as RELAP5 or TRACE.
  • Strong experience performing one-dimensional hydraulic network and transient thermal-hydraulic analyses.
  • Solid understanding of heat transfer, fluid mechanics, and thermodynamics.
  • Excellent analytical, technical writing, and communication skills.

Preferred Qualifications

  • Experience modeling plant control systems and Instrumentation & Controls (I&C).
  • Background supporting commercial or advanced nuclear power plant design or operations.
  • Experience developing or improving analytical methods and engineering models.
  • Experience working within a highly regulated engineering environment.

Additional Information

  • Travel: Up to 5%
  • Work Environment: Primarily remote with occasional onsite collaboration.
  • Physical Requirements: Standard office environment with the ability to sit or stand for extended periods and lift up to 25 pounds as needed.

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About System One

Sourced by ZipRecruiter

System One helps employers get work done more efficiently and economically without compromising quality. Over our 35+ year history, we've helped connect thousands of talented people with innovative companies. The excitement of a perfect fit motivates us every single day.

Industry

Business consulting services and recruiting and staffing services

Company size

5,001 - 10,000 Employees

Headquarters location

Pittsburgh, PA, US

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