System Transient Analysis Engineer

HukariAscendent is a Women-Owned, Small Business specializing in comprehensive engineering and technical support services associated with commercial nuclear power and other Department of Energy (DOE) nuclear activities.

Job Title: System Transients Analysis Engineer

Duration: 1 year with potential for extension(s)

Location: Bellevue, WA & Remote

Short Summary about Job:

HukariAscendent is seeking a highly capable and motivated System Transients Analysis Engineer to support a sodium-cooled reactor program (Natrium). The engineer will be responsible for system transient analyses and may also use software that combines control systems with thermal hydraulics for system or plant modeling. The role interfaces and collaborates with the safety, I&C, and design groups.

Required Qualifications:

• B.S. or higher degree in nuclear, mechanical, or electrical engineering.
• Experience with system codes such as RELAP5/TRACE.
• Strong thermal-hydraulic analytical skills, including one-dimensional hydraulic network analysis, system codes, and transient analysis.
• Strong technical writing skills.
• Strong communication skills.
• High degree of trust and integrity; communicate openly, displays respect, and fosters teamwork.

Preferred Qualifications:

• Experience with ASME component design/analysis OR safety analysis, such as Design Basis Accident (DBA) analysis (highly desirable).
• Experience modeling control systems and I&C (highly desirable).
• Experience with nuclear power plant design or operations.
• Experience developing new analytical methods.

Responsibilities Include:

• Develop RELAP5-3D models for steady-state and transient one-dimensional network hydraulic analyses.
• Develop plant-level control strategy and component-level controllers.
• Perform calculations using first principles of heat transfer, fluid dynamics, and thermodynamics to support and validate analysis results.
• Perform analysis of reactor normal operations, upset events, emergency events, and faulted events to establish design, service, and test loadings and limits.
• Perform analysis of plant-wide transients for evaluation of operation narratives and design solutions.
• Perform multiscale and multidisciplinary control analyses involving the thermal hydraulics of sodium, molten salt, and non-condensable fluids.
• Integrate with other engineering groups performing component, system, fuel, and control system design and related thermal-hydraulic testing.

Miscellaneous/Additional Information:

• Travel required: 0–5%.
• Work environment: standard office environment, more than 8 hours/day; prolonged repetitive, visual- and audio-focused work.
• Physical requirements: sitting/standing, bending, gripping, and fine motor control; ability to lift up to 25 lbs. Accommodations may be considered on a case-by-case basis.
• Export control: the client’s technology is controlled for export by the U.S. Government. Applicants will be asked to identify whether they are a U.S. citizen or national, asylee, refugee, or lawful permanent resident; foreign nationals outside these categories are subject to export control review.

HukariAscendent offers an excellent benefits package including medical, dental, vision, and life insurance, 401(k) plan, and paid time off.

Opportunities with HukariAscendent change frequently. For a complete listing of our current openings, please visit our website at

HukariAscendent is an Equal Opportunity/Affirmative Action Employer. All qualified applicants receive consideration for employment without regard to age, disability, race, color, religion, creed, national origin, sex, marital status, sexual orientation, veteran or military status including disabled veterans and Vietnam era veterans, or other protected status.

HukariAscendent maintains a drug-free workplace.