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Nuclear Mechanical Engineer

GEM Technology
4.3 out of 5
GEM Technology in Oak Ridge, TN 37830
$130,000 - $170,000 a year - Full-time, Contract


GEM Technology in Oak Ridge, TN 37830

Pulled from the full job description

  • 401(k)
  • 401(k) matching
  • Dental insurance
  • Health insurance
  • Life insurance
  • Paid time off
  • Vision insurance

Full job description


Operating at 85 MW, High Flux Isotope Reactor (HFIR) is the highest flux reactor-based source of neutrons for research in the United States, and it provides one of the highest steady-state neutron fluxes of any research reactor in the world. The thermal and cold neutrons produced by HFIR are used to study physics, chemistry, materials science, engineering, and biology. The Research Reactors Division (RRD) at Oak Ridge National Laboratory (ORNL) operates the HFIR.


ORNL is currently preparing for two exciting major replacement projects, the reactor pressure vessel and the beryllium reflector, to sustain and enhance HFIR’s operation performance. Both projects require engineering, design, and analysis supports to compliment the integrated project team to deliver the design milestones on schedule and within scope. Specifically, the individual will be working closely with system engineers, designers, and various other disciplines within RRD. This position will be assigned to the HFIR Upgrades Project Office and interacts with personnel at all levels within the HFIR. 10 or more years working at an operating nuclear reactor with engineering experience including but not limited to engineering design and manufacturing practice including welding and joining techniques combined with a sound understanding of machine design. Have a strong understanding of ASME pressure vessel (Sections 3 and 8) and piping codes (B31.1) and application. Provides project management for large integrated modifications, ensuring project scope is performed, budget is tracked, and resources are managed to complete the project. This position may require a Workplace Substance Abuse Program (WSAP) testing, which requires passing a pre-placement drug test and participation in an ongoing random drug testing program in which employees are subject to being randomly selected for testing and undergoing testing without advance notification.

Major Duties, Responsibilities, and Qualifications:

  • A bachelor’s degree in an engineering related discipline
  • Operating nuclear reactor experience in Engineering
  • Comprehensive understanding of nuclear technology (e.g., nuclear reactor safety basis, design, and construction)
  • Has familiarity with the applicable DOE Orders and Standards, such as DOE O 420.1C, Facility Safety, DOE STD 1189, Integration of Safety into the Design Process, and DOE STD-1073-2016, Configuration Management
  • Prepares engineering designs for new installations and for replacement and upgrade of HFIR structures, systems, and components (SSCs).
  • Performs calculations and analyses to support design basis and requirements.
  • Applies relevant codes and standards, such as ASTM, ASME (e.g., Boiler and Pressure Vessel Code and ASME B31 piping codes), NQA-1, AWS, etc.
  • A strong understanding of reading and interpreting mechanical design drawings as well as understanding of GD&T principles from ASME Y14.5.
  • Supports development of reactor core components replacement plan.
  • Prepares design specifications to define and determine acceptance criteria for component upgrades.
  • Prepares material specifications and provides technical support in procurement of materials.
  • Implements modifications in accordance with RRD configuration control processes.

Job Types: Full-time, Contract

Pay: $130,000.00 - $170,000.00 per year


  • 401(k)
  • 401(k) matching
  • Dental insurance
  • Health insurance
  • Life insurance
  • Paid time off
  • Vision insurance

Experience level:

  • 10 years


  • 8 hour shift
  • Monday to Friday

Application Question(s):

  • Do you currently possess an active Department of Energy Q clearance? (Yes/No)


  • Bachelor's (Required)


  • Nuclear Reactor Operation: 10 years (Required)
  • Understanding Nuclear Technology: 10 years (Required)
  • ASTM & ASME Codes & Standards: 10 years (Required)
  • Mechanical Design Drawing & GD&T: 10 years (Required)
  • Performs Calculations & Analyses: 10 years (Required)
  • familiarity with DOE Orders & Standards: 10 years (Required)
  • Preparing Engineering Designs: 10 years (Required)

Ability to Commute:

  • Oak Ridge, TN 37830 (Required)

Ability to Relocate:

  • Oak Ridge, TN 37830: Relocate before starting work (Required)

Work Location: In person