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Relap5 Jobs (NOW HIRING)

Protingent

Plant Integrated Analysis Engineer

Bellevue, WA · On-site

$37 - $74/hr

Develop RELAP5-3D models for steady state and transient one-dimensional network hydraulic analyses. * Develop plant level control strategy and component level controller. * Perform calculations using ...

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 ...

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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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System Transients Analysis Engineer

System Transients Analysis Engineer

System One Holdings, LLC

Bellevue, WA • On-site

$67 - $110/hr

Full-time

Re-posted 20 days ago

Job description

Job Title: System Transients Analysis Engineer
Location: Bellevue, WA
Job Type: Contract
Work Model: Hybrid/Onsite Preferred
Overview
System One is seeking a highly capable and motivated System Transients Analysis Engineer to support an advanced sodium-cooled reactor program. This role will focus on thermal hydraulic and transient analysis activities supporting advanced reactor system design, plant operations analysis, and control system integration.
The ideal candidate will have strong experience with system analysis codes such as RELAP5 or TRACE, along with a strong foundation in thermal hydraulics, heat transfer, fluid dynamics, and nuclear plant transient analysis.
Responsibilities
  • Develop RELAP5-3D models for steady-state and transient one-dimensional hydraulic network analyses
  • Perform reactor and plant transient analyses for normal operations, upset conditions, emergency events, and faulted scenarios
  • Develop plant-level control strategies and component-level controllers
  • Perform calculations using first principles of heat transfer, thermodynamics, and fluid dynamics to validate analytical results
  • Support evaluation of plant-wide transients, operational narratives, and design solutions
  • Perform multiscale and multidisciplinary thermal hydraulic analyses involving sodium, molten salt, and non-condensable fluids
  • Collaborate closely with safety, I&C, design engineering, and testing teams
  • Support development of new analytical methods and advanced modeling techniques
  • Prepare technical reports, calculations, and engineering documentation

Required Qualifications
  • Bachelor's degree or higher in Nuclear Engineering, Mechanical Engineering, Electrical Engineering, or related discipline
  • Strong experience with thermal hydraulic system codes such as RELAP5 and/or TRACE
  • Strong analytical background in:
    • Thermal hydraulics
    • Fluid dynamics
    • Heat transfer
    • Transient analysis
    • One-dimensional hydraulic network modeling
  • Strong technical writing and communication skills
  • Ability to work effectively in a collaborative, fast-paced engineering environment
  • High level of professionalism, integrity, and teamwork

Preferred Qualifications
  • Experience with ASME component design and analysis
  • Experience modeling control systems and Instrumentation & Controls (I&C)
  • Experience supporting nuclear power plant design or operations
  • Experience developing new analytical methods
  • Advanced reactor or sodium-cooled reactor experience

Physical & Work Environment Requirements
  • Ability to sit and/or stand for extended periods
  • Minimal lifting requirements up to 25 pounds
  • Prolonged computer and keyboard work
  • Standard office or engineering work environment
  • Occasional travel up to 5%

Additional Information
This position may require compliance with U.S. export control regulations. Applicants may be asked to provide information regarding citizenship or work authorization status as part of the hiring process.
Ref: #161-Managed Staffing Charlotte

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