Safety Analysis Engineer, Nuclear

Safety Analysis Engineer, Nuclear Location: Bellevue, WA Type: Contract, 12 months Contractor Work Model: RemoteThis contract Safety Analysis Engineer role performs deterministic nuclear safety analysis and transient/accident modeling (RELAP5-3D or similar) to support U.S. NRC licensing submittals. The engineer develops and documents system models, analyzes AOOs/DBEs/DBAs and licensing-basis events, supports FSAR-style reporting, and collaborates across engineering teams on methods development, V&V/benchmarking, and uncertainty/sensitivity studies.ResponsibilitiesPerform deterministic safety analysis using RELAP5-3D code for the Natrium sodium fast reactorAnalyze design basis accidents (DBAs) and licensing basis events (LBEs) to support reactor licensing with US NRCModel and integrate various plant systems within safety analysis computer codesDevelop safety analysis reports, including the Final Safety Analysis Report (FSAR)Collaborate with cross-functional teams on core and reactor SSC requirements and licensing documentationContribute to safety method development, code assessment, scaling analysis, and validation activitiesMaintain documentation of models and analysis resultsConduct engineering reviews of analysis and design deliverablesAssess plant transient benchmark tests and perform relevant benchmark calculationsSupport implementation of software capabilities for transient and accident analysisRequirementsExtensive experience in nuclear safety analysis and reactor system modelingProficiency with safety analysis software such as RELAP5, TRACE, TRAC, SAS4A/SASSYS-1, or similarExperience in transient and accident analysis for NRC submittals (e.g., Chapter 15 FSAR)Strong knowledge of nuclear systems thermal-hydraulics, reactor physics, and transient phenomenaFamiliarity with nuclear reactor instrumentation, control systems, and safety regulation complianceDegree: B.S. with 10+ years or M.S./Ph.D. with 5-7+ years of nuclear engineering or relevant fieldDemonstrated analytical, modeling, and reporting skillsExperience working in multidisciplinary teams and under quality assurance programs (NQA-1)Strong software engineering skills in Python, Fortran, C++, or similar are a plus