Navarro Research and Engineering is recruiting a Probabilistic Risk Assessment (PRA)(2670) Engineer in Idaho Falls, ID.

Navarro Research & Engineering is an award-winning federal contractor dedicated to partnering with clients to advance clean energy and deliver effective solutions for complex challenges in the nuclear and environmental fields. Joining Navarro means being a part of an exceptional team committed to quality and safety while also looking for innovative strategies to create value for the client’s success. Headquartered in Oak Ridge, Tennessee, Navarro has active programs in place across the nation for DOE/NNSA, NASA, and the Department of Defense.

Navarro is seeking a highly motivated and experienced Probabilistic Risk Assessment (PRA) Engineer to join our dynamic team focused on the design, licensing, and deployment of cutting-edge nuclear reactor technologies. In this critical role, you will develop and apply PRA models to inform reactor design, support licensing applications, and ensure the highest standards of safety and reliability for advanced reactor projects. Your work will directly contribute to establishing a robust safety case and maintaining continuous compliance with regulatory requirements.

Responsibilities

PRA Model Development & Application

Develop, update, and maintain PRA models for advanced reactor designs addressing internal events, internal/external floods, internal fires, seismic events, high winds, and other external hazards. Systematically enumerate event sequences and assess their frequency and consequences, including common-cause failures. Define PRA Safety Functions (PSFs) and identify critical SSCs (Structures, Systems, and Components). Apply PRA to evaluate safety characteristics and provide structured inputs for Licensing Basis Events (LBEs). Use PRA to inform performance targets for SSC capability and reliability.

Licensing & Regulatory Support

Prepare and submit PRA documentation to support CP, OL, COL, and DC applications. Ensure PRA scope, detail, and quality align with regulatory guidance and plant design stage. Develop methodologies for site characteristics, hazard assessments, and off-site dose projections. Address PRA needs related to regulatory requirements such as 10 CFR 50.71(h).

 Quality & Assurance

Participate in PRA peer reviews and self-assessments per NRC-endorsed standards (ASME/ANS, NEI 20-09). Implement PRA configuration control to reflect design evolution, modifications, and operations. Identify and evaluate uncertainties and assumptions in PRA models.

Cross-Functional Collaboration

Partner with design engineers to define SSC safety functions for PRA modeling. Collaborate with Human Factors Engineering (HFE) teams on Human Reliability Analysis (HRA). Provide PRA insights to procedure and training program development.