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Relap5 Jobs (NOW HIRING)

AMPERA INC

Senior Nuclear Engineer

Palm Beach Gardens, FL · Hybrid

$98.90K - $135.80K/yr

Lead reactor system design and performance analysis using modern computational tools (e.g., MCNP, SCALE, RELAP5, OpenMC, or equivalent). * Develop, model, and validate neutron transport, heat ...

Protingent

Senior Safety Methods Engineer

Bellevue, WA · On-site

$37 - $74/hr

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 ...

Holtec International

Simulator Design Engineer I

Camden, NJ · On-site

$115K - $135K/yr

Experience in simulator tools, such as 3KeyMaster, RELAP5, MELCOR, or equivalent. * Knowledge of digital twin technology and real-time data integration. * Familiarity with NRC regulations and ANS-3.5 ...

Protingent

Senior Safety Analysis Engineer

Bellevue, WA · On-site

$69 - $115/hr

Significant experience with safety analysis software such as RELAP5, TRACE, TRAC, SAS4A/SASSYS-1, or other nuclear system analysis software. * Experience in transient and accident analysis for ...

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 ...

Protingent

Senior Safety Analysis Engineer

Bellevue, WA · On-site

$69 - $115/hr

Significant experience with safety analysis software such as RELAP5, TRACE, TRAC, SAS4A/SASSYS-1, or other nuclear system analysis software. * Experience in transient and accident analysis for ...

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How much do relap5 jobs pay per hour?

As of May 31, 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, 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 RELAP5?

RELAP5 is a computer code developed by Idaho National Laboratory for the analysis of thermal-hydraulic behavior in nuclear reactor systems during normal and accident conditions. It is widely used by engineers and researchers to simulate the behavior of reactor coolant systems, particularly in light water reactors. RELAP5 models fluid flow, heat transfer, and reactor system response, providing valuable insights for safety analysis and design improvements.

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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Infographic showing various Relap5 job openings in the United States as of May 2026, with employment types broken down into 2% Internship, 84% Full Time, and 14% Contract. Highlights an 86% Physical, 12% Hybrid, and 2% Remote job distribution, with an average salary of $104,344 per year, or $50.2 per hour.

Senior Nuclear Engineer

AMPERA INC

Palm Beach Gardens, FL • Hybrid

$98.90K - $135.80K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 14 days ago

Job description

Benefits:
  • 401(k)
  • 401(k) matching
  • Competitive salary
  • Dental insurance
  • Health insurance
  • Paid time off
  • Vision insurance
  • Donation matching
  • Employee discounts
  • Opportunity for advancement
  • Wellness resources

Senior Nuclear Engineer

Location: Palm Beach Gardens, FL
Employment Type: Full-time, Exempt
About AMPERA

AMPERA is redefining clean, energy with compact, ultra-safe nuclear systems that power AI, industry, and defense with zero emissions and unmatched reliability. Our modular micro-reactors combine the best of fusion and fission to deliver scalable, deployable, and inherently safe energy anywhere.
As a fast-growing company, AMPERA blends the agility of a startup with the ambition of a global energy innovator. Joining us means becoming part of a bold mission to revolutionize how the world generates power through advanced nuclear design, safety innovation, and next-generation manufacturing.
Position Overview

We are seeking highly skilled and motivated Senior Nuclear Engineers to join AMPERAs advanced reactor development team. These engineers will play a critical role in the design, analysis, and validation of AMPERAs compact micro-reactor systems working at the intersection of nuclear physics, thermal-hydraulics, fuel systems, and materials science.
This position offers an opportunity to work on first-of-a-kind technology that combines fusion-fission hybrid principles, advanced materials, and additive manufacturing to deliver the worlds safest, most efficient nuclear energy systems.
Key Responsibilities

  • Lead reactor system design and performance analysis using modern computational tools (e.g., MCNP, SCALE, RELAP5, OpenMC, or equivalent).
  • Develop, model, and validate neutron transport, heat transfer, and thermal-fluid interactions for micro-reactor cores.
  • Collaborate with cross-functional teams on the integration of fuel systems, control systems, and structural design.
  • Evaluate reactor safety through probabilistic risk assessment and transient simulation.
  • Support regulatory and licensing documentation for compliance with NRC, DOE, or DoD standards.
  • Provide technical leadership and mentorship to junior engineers within the nuclear design group.
  • Contribute to experimental testing programs and prototype validation.

Qualifications

  • M.S. or Ph.D. in Nuclear Engineering, Mechanical Engineering, or related field.
  • 7+ years of experience in nuclear systems design, reactor analysis, or related R&D.
  • Expertise in neutronics, reactor physics, and/or thermal-hydraulics modeling.
  • Familiarity with safety codes and design standards (ASME, NRC, DOE, ANSI/ANS).
  • Experience with small modular reactors (SMRs), micro-reactors, or advanced reactor concepts preferred.
  • Strong problem-solving, leadership, and communication skills.
  • U.S. citizenship or eligibility for security clearance may be required due to project sensitivity.

What We Offer

  • Competitive salary
  • Comprehensive benefits package including healthcare, dental, vision, STD, LTD, Life/AD&D and 401(k).
  • Opportunity to pioneer advanced nuclear fuel technologies driving the next generation of clean energy.
  • Collaborative, mission-driven environment that fosters technical excellence and innovation.
  • Career advancement potential as AMPERA expands its fuel development and reactor manufacturing programs.