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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 Jun 19, 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 the job of a nuclear reactor?

A nuclear reactor operator is responsible for controlling and monitoring the reactor's systems to ensure safe and efficient operation. They interpret technical data, adjust controls, and respond to alarms, often working in a regulated environment that requires specialized training and certification.

What is RELAP5?

RELAP5 is a computer code used for thermal-hydraulic safety analysis of nuclear reactors. It simulates reactor behavior during transients and accidents, requiring knowledge of reactor systems and programming skills 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.

Is relap a safe thing to use?

Relap5 is a software tool used for nuclear reactor safety analysis and simulation; it is safe to use when operated by trained professionals following proper safety protocols. As a simulation software, it does not pose physical risks but requires understanding of nuclear safety standards and proper handling. Ensuring correct usage and adherence to industry guidelines is essential for safe and effective results.

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.

What is the highest paying nuclear job?

The highest paying nuclear jobs often include senior reactor operators, nuclear engineers, and health physics managers, with salaries exceeding $100,000 annually. These roles typically require advanced degrees, specialized certifications, and extensive experience in nuclear safety, regulation, or engineering environments.
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Relap5 jobs near you
Infographic showing various Relap5 job openings in the United States as of June 2026, with employment types broken down into 92% Full Time, and 8% Contract. Highlights an 100% Physical job distribution, with an average salary of $104,344 per year, or $50.2 per hour.

System Thermal-Hydraulics Analyst

Aalo Atomics

Idaho Falls, ID • On-site

$110K/yr

Full-time

Medical, Dental, Vision, PTO

Posted 8 days ago

Job description

About Aalo Atomics
Aalo Atomics is pioneering a new era in clean energy with factory-fabricated microreactors designed to deliver affordable, scalable, and reliable nuclear power. Our mission is to make nuclear energy globally accessible, starting with the Aalo-1, a 10 MWe reactor leveraging cutting-edge safety, modularity, and efficiency. Based in Austin, TX, we're rapidly growing as we work to deploy the world's first fleet of advanced microreactors. Join us and help revolutionize energy for a sustainable future.
About the role
We are seeking an experienced System Thermal-Hydraulics Analyst to support advanced nuclear system analysis and safety evaluations. The successful candidate will perform detailed system-level thermal-hydraulic modeling and contribute to analysis supporting reactor design, safety margins, and transient/accident behavior.
What you'll do
  • Develop, execute, and maintain system thermal-hydraulic models using RELAP5-3D code.
  • Perform steady-state and transient analyses for nuclear systems, including normal operation, off-normal events, and accident scenarios.
  • Interpret and document analytical results to support licensing, design decisions, and safety assessments.
  • Collaborate with reactor designers, safety analysts, and experimental teams to support integrated system evaluations.
  • Participate in code verification, validation, and benchmarking activities against experiments or operating data.
  • Prepare high-quality technical reports, analysis documentation, and presentations for internal and external stakeholders.

Qualifications
Required:
  • 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 understanding of single and two-phase flow, heat transfer, and nuclear reactor thermal-hydraulics.
  • Demonstrated ability to work independently on complex analysis tasks.

Preferred Qualifications
  • Experience supporting DOE, NRC, or national laboratory projects.
  • Familiarity with model development best practices and QA requirements for safety-related analysis.
  • Experience mentoring junior analysts.

Requirements:
  • Based in the United States
  • Willing to work on-site in Idaho Falls, Idaho

What We Offer:
  • Competitive salary starting at $110,000
  • Health, Dental, Vision Insurance
  • Paid Time Off
  • Corporate Gym Membership

Additional Information:
Aalo Atomics provides a collaborative and supportive work environment, opportunities for professional growth, intellectually challenging careers, and competitive compensation. Aalo Atomics is an equal opportunity employer and considers all employment decisions without regard to race, color, religion, national or ethnic origin, sex, sexual orientation, gender identity or expression, age, disability, veteran status, or any other characteristic protected by law.
Applicants must be U.S. Citizens or U.S. Persons in compliance with 10 CFR Part 810 and may not hold non-compliant foreign citizenships.
Direct applicants only. No recruiters or staffing agencies, please.

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