PSA Engineer III – Nuclear Safety & Risk Leader (Hybrid)

Holtec International; Madrid; Hybrid; EUR 133,000 - 156,000; Full time

Benefits offered by this job

Industry-leading medical, dental, and视

Vision coverage

401(k) retirement plan with company 5%

Paid time off and holidays

Wellness program

Commuter benefits

Life and AD&D insurance

Education assistance

Employee Assistance Program

Job summary

Holtec International in Madrid, Spain, is seeking a PSA Engineer III to lead probabilistic safety analysis for the SMR-300 program. You will develop PSA models and conduct thermal-hydraulic analyses to support risk-informed design and licensing, collaborating with a multidisciplinary team in a fast-paced, highly regulated environment.

The role requires deep PSA expertise, experience with RELAP5-3D and MELCOR, and the ability to translate risk insights into design improvements.

Qualifications

• Bachelor's degree in Nuclear Engineering, Mechanical Engineering, or related field required.
• 6–10 years of PSA and/or thermal-hydraulic safety analysis experience in nuclear industry preferred.
• Strong understanding of LWR thermal-hydraulic behavior.
• Experience with PSA tools: CAFTA, SAPHIRE, RiskSpectrum, RELAP5-3D, MELCOR.

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 (CDF, LRF).
• Maintain PSA models as SMR-300 design evolves.
• Support risk-informed programs (RTNSS, D-RAP, 10 CFR 50.69).
• Partner with design engineers to integrate PSA insights into system/plant design decisions.
• Mentor junior engineers on PSA methodologies and tools.
• Ensure technical accuracy and quality of PSA deliverables.
• Support regulatory interactions and licensing documentation.

Skills

Analytical skills

Technical writing

Communication skills

Cross-functional collaboration

Regulatory understanding

Education

Bachelor's degree in Nuclear/Mechanical Eng

Tools

CAFTA

SAPHIRE

RiskSpectrum

RELAP5-3D

MELCOR

Job description

Holtec International in Madrid, Spain, is seeking a PSA Engineer III to lead probabilistic safety analysis for the SMR-300 program. You will develop PSA models and conduct thermal-hydraulic analyses to support risk-informed design and licensing, collaborating with a multidisciplinary team in a fast-paced, highly regulated environment.

The role requires deep PSA expertise, experience with RELAP5-3D and MELCOR, and the ability to translate risk insights into design improvements.