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Senior Mechanical Design Engineer

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Location: BRACEVILLE, IL, United States
Organization: Exelon Generation Co. LLC
Job ID: 225181
Date Posted: Aug 4, 2020

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Job Description


At Exelon, we've got a place for you!

Join the nation's leading competitive energy provider, with one of the largest electricity generation portfolios and retail customer bases in the country. You will be part of a family of companies that strives for the highest standards of power generation, competitive energy sales, and energy delivery. Our team of outstanding professionals is focused on performance, thought leadership, innovation, and the power of ideas that come from a diverse and inclusive workforce.

Exelon will provide you the tools and resources you need to design, build and enhance a successful career. We are also dedicated to motivating the success of our employees through competitive base salary, incentives, and health and retirement benefits.

Join Exelon and share your passion at a forward-thinking Fortune 100 company. Establish yourself in a place where you can truly shine and create a brighter, more sustainable tomorrow. Energize your career at Exelon!


Analyze and design changes and upgrades to nuclear power plant mechanical systems, equipment and components including, Nuclear Steam Supply Systems (NSSS) and Balance of Plant (BOP), piping, pumps, valves, tanks, and heat exchangers.

Possess a working knowledge of mechanical standards and regulatory guidance applicable to the commercial nuclear power industry.   


  • Prepare mechanical specifications for purchases of materials or equipment.
  • Perform detailed design calculations to support mechanical plant changes. These include proficiency in at least one of the following:
    • Response spectra piping analysis, piping stress calculations, minimum wall evaluations, and code repairs to pressure vessels, etc
    • Fluid flow and thermal hydraulic analysis, piping, pump and heat exchanger sizing, High Energy Line Break Analysis (HELB), containment analysis, ECCS analysis, gas transport and water hammer analysis, etc.
    • Ventilation system analysis, pressure drop and air flow calculations, fan, duct, heater and cooler/chiller sizing, and damper selection, etc.
  • Possess proficiency with analytical software including: piping analysis software (e.g., PIPSYS, ME101, Autopipe, etc.), GOTHIC, RELAP, ProtoHX, Pipe-flow, MATHCAD, and Autodesk AutoCAD software
  • Have the capability to interpret and prepare technical drawings, including piping isometrics and routing drawings, Piping and Instrumentation Diagrams (P&IDs), ventilation drawings
  • Oversee contracted engineering tasks and act as the lead responsible engineer on mechanical projects
  • Interface with other affected disciplines and departments during the design change process and incorporate their input into mechanical design changes.

Department Specific Roles/Responsibilities:

Design Engineering
Defend the plant design and licensing basis. Preparation and approval of design outputs and plant changes in accordance with approved processes and design requirements. Support installation and testing of plant systems and components and facility changes. Ensure the plant’s physical and functional characteristics are accurately reflected in the plant documents. Perform engineering analysis to support plant changes.


  • B. S. in Engineering or Licensed Professional Engineer and minimum of 7 years’ experience 
  • 7 or more years’ solid performance 
  • Commercial Nuclear Power Plant Experience

  • Professional Engineer Registration
  • Advanced technical degree or related coursework

Exelon is proud to be an equal opportunity employer and employees or applicants will receive consideration for employment without regard to: age, color, disability, gender, national origin, race, religion, sexual orientation, gender identity, protected veteran status, or any other classification protected by federal, state, or local law.

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