PSA Engineer III — Risk‑Informed Nuclear Safety (Hybrid)

Holtec International; Camden (AL); Hybrid; USD 150,000 - 175,000; Full time

Benefits offered by this job

Medical/Dental/Vision coverage

Hybrid work program

401(k) with company match

PTO and holidays

Wellness program

Commuter benefits

Life and AD&D insurance

Education assistance

Employee Assistance Program

Diversity programs

Job summary

Holtec International is seeking a Probabilistic Safety Analysis (PSA) Engineer III to lead PSA efforts for the SMR‑300 program. You will join a multidisciplinary team to advance risk-informed design, safety analysis, and licensing of next‑gen nuclear technology, applying advanced PSA methods and thermal-hydraulic modeling.

Responsibilities include developing Level 1/2 PRA models, performing RELAP5-3D/MELCOR analyses, and mentoring junior engineers while ensuring regulatory compliance and

Qualifications

• BS in Nuclear or Mechanical Engineering.
• 6–10 years PSA/thermal-hydraulic safety analysis experience.
• Strong understanding of LWR thermal-hydraulic behavior.
• Expertise with PSA tools: CAFTA, SAPHIRE, RiskSpectrum, RELAP5-3D, MELCOR.
• Knowledge of PSA regulatory frameworks and ASME/ANS PRA standards.
• Strong analytical, writing, and communication skills.

Responsibilities

• Lead development of PSA models and supporting thermal-hydraulic analyses for risk‑informed design and licensing
• Develop Level 1 and Level 2 PRA models for internal and external events across full power and shutdown conditions
• 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 metrics such as CDF and LRF
• Maintain and update PSA models as SMR‑300 design evolves
• Apply PSA results to support risk‑informed programs (e.g., RTNSS, D‑RAP, 10 CFR 50.69 categorization)
• Partner with design engineers to integrate PSA insights into system and plant design decisions
• Mentor junior engineers on PSA methodologies, tools, and best practices
• Ensure technical accuracy, quality, and consistency across all PSA deliverables
• Support regulatory interactions and documentation related to safety analysis and licensing

Skills

PSA modeling

Thermal-hydraulic modeling

Regulatory knowledge

Technical writing

Cross-functional collaboration

Communication

Education

Bachelor’s degree in Nuclear/Mechanical Engineering

Tools

CAFTA

SAPHIRE

RiskSpectrum

RELAP5-3D

MELCOR

Job description

Holtec International is seeking a Probabilistic Safety Analysis (PSA) Engineer III to lead PSA efforts for the SMR‑300 program. You will join a multidisciplinary team to advance risk-informed design, safety analysis, and licensing of next‑gen nuclear technology, applying advanced PSA methods and thermal-hydraulic modeling.

Responsibilities include developing Level 1/2 PRA models, performing RELAP5-3D/MELCOR analyses, and mentoring junior engineers while ensuring regulatory compliance and