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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 ...

Holtec

PSA Engineer I

Camden, NJ · On-site

$115K - $140K/yr

Thermal-hydraulic analysis specialization: support RELAP5-3D and MELCOR modeling to simulate core and containment response for severe accident scenarios that inform PRA quantifications. * Logic ...

Holtec International

PSA Engineer III

Camden, NJ · On-site

$150K - $175K/yr

Perform thermal-hydraulic modeling (RELAP5-3D, MELCOR) to simulate core and containment response in severe accident scenarios * Develop and quantify event trees and fault trees to evaluate key risk ...

Holtec International

PSA Engineer I

Camden, NJ · On-site

$115K - $140K/yr

Thermal-hydraulic analysis specialization: support RELAP5-3D and MELCOR modeling to simulate core and containment response for severe accident scenarios that inform PRA quantifications. * Logic ...

NuScale Power, LLC

Simulator Engineer 3

Houston, TX · On-site +1

Ideal candidate is familiar with the GSE software suite (i.e., SimExec and JTopmeret), have experience with thermal hydraulic system codes (e.g., RELAP5 and Trace), and have experience with neutronic ...

NuScale Power, LLC

Simulator Engineer 3

Corvallis, OR · On-site +1

Ideal candidate is familiar with the GSE software suite (i.e., SimExec and JTopmeret), have experience with thermal hydraulic system codes (e.g., RELAP5 and Trace), and have experience with neutronic ...

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How much do relap5 jobs pay per hour?

As of Sep 11, 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 September 2026, with employment types broken down into 76% Full Time, and 24% Contract. Highlights an 89% Physical, and 11% Remote job distribution, with an average salary of $104,344 per year, or $50.2 per hour.

Safety Analysis Engineer, Nuclear

Bellevue, WA • Remote

System One
Business Consulting Services • 5 - 10K employees
Learn more about System Oneexternal

Contractor

Medical, Dental, Vision, Life, Retirement

Re-posted 25 days ago

Job description

Job Title: Safety Analysis Engineer, Nuclear Location: Bellevue, WA Type: Contract, 12 months Contractor Work Model: Remote Overview This contract Safety Analysis Engineer role performs deterministic nuclear safety analysis and transient/accident modeling (RELAP5-3D or similar) to support U.S. NRC licensing submittals. The engineer develops and documents system models, analyzes AOOs/DBEs/DBAs and licensing-basis events, supports FSAR-style reporting, and collaborates across engineering teams on methods development, V&V/benchmarking, and uncertainty/sensitivity studies.

Responsibilities

  • Perform deterministic safety analysis using RELAP5-3D code for the Natrium sodium fast reactor
  • Analyze design basis accidents (DBAs) and licensing basis events (LBEs) to support reactor licensing with US NRC
  • Model and integrate various plant systems within safety analysis computer codes
  • Develop safety analysis reports, including the Final Safety Analysis Report (FSAR)
  • Collaborate with cross-functional teams on core and reactor SSC requirements and licensing documentation
  • Contribute to safety method development, code assessment, scaling analysis, and validation activities
  • Maintain documentation of models and analysis results
  • Conduct engineering reviews of analysis and design deliverables
  • Assess plant transient benchmark tests and perform relevant benchmark calculations
  • Support implementation of software capabilities for transient and accident analysis

Requirements

  • Extensive experience in nuclear safety analysis and reactor system modeling
  • Proficiency with safety analysis software such as RELAP5, TRACE, TRAC, SAS4A/SASSYS-1, or similar
  • Experience in transient and accident analysis for NRC submittals (e.g., Chapter 15 FSAR)
  • Strong knowledge of nuclear systems thermal-hydraulics, reactor physics, and transient phenomena
  • Familiarity with nuclear reactor instrumentation, control systems, and safety regulation compliance
  • Degree: B.S. with 10+ years or M.S./Ph.D. with 5-7+ years of nuclear engineering or relevant field
  • Demonstrated analytical, modeling, and reporting skills
  • Experience working in multidisciplinary teams and under quality assurance programs (NQA-1)
  • Strong software engineering skills in Python, Fortran, C++, or similar are a plus

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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About System One

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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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