[Neutron] STS Senior Neutronics Scientist

Sanders, Colin sanderscs at ornl.gov
Mon Feb 8 14:27:40 CET 2021


Oak Ridge National Laboratory (ORNL) is seeking a Neutronics Scientist for the Second Target Station (STS) project. The STS is a >$1Billion, Department of Energy project to be constructed at the ORNL Spallation Neutron Source (SNS).  The STS will provide new capabilities for the study of a broad range of materials with neutron scattering and support thousands of users from the physical, materials, and applied sciences and industry. The science capabilities provided by the instrument suite at the STS will complement those of the two existing DOE Office of Science neutron scattering user facilities at ORNL, the First Target Station (FTS) of the SNS and the High Flux Isotope Reactor (HFIR). The STS will deliver the highest peak brightness of cold neutrons in the world, which together with advances in neutron optics, instrumentation, and detectors, will ensure US leadership in neutron scattering for decades to come.

The STS Target Systems group is responsible for the design, fabrication, installation, and testing of all hardware necessary to convert the incoming 700 kW, 15 Hz proton beam into 22 beams of cold neutrons.


The Neutronics  Scientist performs simulations of complex nuclear systems with state-of-the-art radiation transport codes, contributes to the development and maintenance of nuclear analysis tools to support complex analysis needs, and develops shielding design solutions towards providing a safe environment to users of the facility. The Neutronics Scientist will participate in experimental programs towards beam characterization and moderator development.  The Neutronics Scientist will work closely with STS design engineers and scientists to optimize the STS configuration.

Major Duties and Responsibilities:

  *   The selected applicant will have a leading role in the most challenging neutronics analyses relevant for the design, installation, and commissioning of STS, and will be able to autonomously provide results of interest such as moderator neutron performance, radiation-induced material damage estimates, nuclear heating, activation, etc., while working in an interdisciplinary team of scientists, engineers, and designers.
  *   The selected applicant will exercise his/her expertise to advise other STS neutronics scientists and support their professional development.
  *   Utilize expertise towards the design and modeling of shielding solutions for proton accelerator, target/moderator systems, and neutron scattering instruments.
  *   Develop and implement strategies to optimize the utilization of neutrons from the source to the neutron scattering instruments in collaboration with instrument development teams.
  *   Provide directions and contribute to the development and maintenance of nuclear analysis tools to support complex analysis needs.
  *   Develop external collaborations with other institutions developing similar or complimentary techniques.
  *   Routinely publish results of neutronics development, design, and/or analysis.
  *   Ensure and monitor compliance with environment, safety, health (ESH), and quality program (QA) requirements. Promptly identify ESH and QA issues and communicate them to project and division management, ESH and QA contacts, and/or subcontractor contacts as appropriate.
  *   As a member of the ORNL scientific community, neutron scientist will be expected to commit to ORNL's Research Code of Conduct.  ORNL’s full code of conduct, and a statement by the Lab Director's office can be found here:  https://www.ornl.gov/content/research-integrity

Basic Qualifications:

  *   Ph. D. in nuclear engineering or physics, with degree focus on neutron scattering, neutron source development, or radiation transport simulations
  *   6-10 years of relevant experience in nuclear analyses of neutron sources
  *   Ability to articulate analysis results orally and in writing to colleagues that may or may not be neutronics experts
  *   Ability to understand and balance engineering constraints against neutronics and physics figures of merit
  *   Experience in utilization and development of Monte Carlo techniques for particle transport
  *   Programming experience in computer languages such as C, Fortran, Perl, and Python
  *   Ability to articulate and formulate a vision for developing strategic new capabilities
  *   Demonstrated success in working with a multi-disciplinary team in a dynamic research environment
  *   A strong record of scientific publication
  *   Excellent oral and written communication skills
  *   Must be available for some domestic and international travel
  *   This position requires access to technology that is subject to export control requirements.  Successful candidates must be  qualified for obtaining licenses for export-controlled codes and libraries (including source codes) distributed by RSICC, such as, but not limited to, the MCNP6

Preferred Qualifications:

  *   Prior experience in the neutronics design and analysis of spallation targets
  *   Experience in the use of Monte Carlo particle transport simulation techniques for spallation physics
  *   Experience with neutron detectors, data acquisition systems, cryogenics
  *   Proven record in solving challenging  neutronics problems

Other Requirements: Please provide a list of publications when applying for this position.

Work Direction and Interface: Position reports to the STS Target Systems Group Leader.

Authority/Approval Levels:  Coordinates and leads analysis and design tasks in cooperation with other neutronics scientists, engineers, and designers

Measures of Effectiveness:

  *   Successfully contributes to design of STS systems components via neutronics analysis
  *   Successfully communicates the analysis results and design recommendations verbally and in writing
  *   Successfully represents STS at reviews and other project meetings and workshops

Relocation:  Moving can be overwhelming and expensive. UT-Battelle offers a generous relocation package to ease the transition process. Domestic and international relocation assistance is available for certain positions. If invited to interview, be sure to ask your Recruiter (Talent Acquisition Partner) for details.

For more information about our benefits, working here, and living here, visit the “About” tab at jobs.ornl.gov.

Colin Sanders
Senior Talent Acquisition Partner
Computing and Computational Sciences
Second Target Station (STS)
Fusion and Fission Energy Science
Oak Ridge National Laboratory
Managed by UT Battelle for the U.S. Department of Energy
Direct - 865.341-0269
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