System Transients Thermal Hydraulics Engineer - Bellevue, WA - RCS Corporation

System Transients Thermal Hydraulics Engineer – Bellevue, WA

Engineering - Nuclear

Job Type: Contract
Posted: 10/18/2021

Bellevue, Washington

RCS Corporation has an immediate need for a Contract System Transients Thermal Hydraulics Engineer for our client in the Bellevue, WA area. Contract is anticipated to go through March 31st, 2022, but could extend past this date.

Who We Are

RCS Corporation is a certified Women-Owned Small Business (WOSB) specializing in the recruitment of professionals for best-of-class companies throughout the United States.  Since 1994, RCS recruits top talent for direct hire, temp-to-perm and contract staffing positions and provides customized payroll services. Our Recruiting Specialties consist of all Engineering Disciplines, Project Management, Project Controls, Information Technology, Energy Efficiency and Business Professionals.


Reporting to Manager, Thermal Hydraulics, the System Transients Thermal Hydraulics Engineer is responsible for both thermal-hydraulics plant-wide and component level transient analysis with application to the TerraPower sodium-cooled reactor program.  The successful candidate will support transient analyses for various reactor designs including novel systems.  The analyses may involve use of existing in-house and commercial codes or may involve generation of new code or augmentation of existing code.  They will interface with the safety group and other groups to accurately represent the different systems of the plant. 


  • Develop and apply thermal-hydraulic analysis methods, including steady state and transient one-dimensional network hydraulic analyses.

  • 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 as defined in the ASME BPVC Section III to establish design, service, and test loadings and limits. 

  • Perform multiscale and multidisciplinary neutronics and control analyses involving the thermal hydraulics of sodium, molten salt, and non-condensable fluids. 

  • Integrate with other engineering groups performing aspects of component, system, fuel, and control system design and related thermal-hydraulic testing.

  • Perform code benchmarking and validation analyses to support code qualification and methodology development.


Required Qualifications and Skills

  • M.S. or PhD in nuclear or mechanical engineering.

  • Strong thermal-hydraulic analytical skills with one dimensional hydraulic network analysis, system codes experience and transient analysis.

  • Substantial (5-10 years) experience with RELAP, SAS4A/SSYS-1, GOTHIC, or other system code.

  • Familiarity with code V&V and associated regulatory requirements.

  • Experience with nuclear power plant design or operations a plus.

  • Knowledge of design approach under ASME Boiler Code Section III a plus.

  • Experience developing new analytical methods highly desirable.

  • Experience with first-of-a-kind or high temperature nuclear reactor design projects is a plus.

  • Strong technical writing skills. 

  • Effective communication skills.

  • The successful candidate will possess a high degree of trust and integrity, communicate openly and display respect and a desire to foster teamwork.

Job Functions

Job Functions are physical actions and/or working conditions associated with the position.  These functions may also constitute essential functions for the job which the employee must be able to fulfill, with or without accommodation.  Information provided below is to help describe the job so that the applicant has a reasonable understanding of the job duties/expectations.  An applicant's ability to perform and/or tolerate these actions and conditions will be discussed and workplace accommodations may be made on a case-by-case basis following an individualized assessment of the applicant and other considerations, including but not limited to any governing safety standards.

  • Motor Abilities: Sitting and/or standing for extended periods, bending/stooping, grasping/gripping, fine motor control (hands)

  • Physical exertion and/or requirements: Minimal, with ability to safely lift up to 25 pounds

  • Ability to work in a laboratory setting with fluctuating temperatures

  • Repetitive work: Prolonged

  • Special Senses: Visual and audio focused work

  • Work Conditions: Stairs, typing/keyboard, standard and/or sitting working environment of >8 hrs./day 

  • Travel required: 0-5%


RCS is an equal opportunity employer that prohibits discrimination and harassment of any type. RCS recruits, hires, and promotes for all positions without regard to race, color, religion, creed, national origin, citizenship status, disability, military status, veteran status, marital status, sexual orientation, gender identity, sex, genetic information or age. All terms and conditions of employment such as compensation, benefits, work assignment, availability of facilities and privileges of employment are administered on the same basis of equality.
RCS Corporation