Nuclear Shielding & Criticality Engineer

Talascend, LLC; United States; Remote; USD 90,000 - 130,000; Full time

Job summary

A leading company is seeking a Nuclear Shielding and Criticality Engineer for a long-term remote contract. The role involves radiation shielding design, criticality calculations, and utilizing MCNP for safety analysis in advanced nuclear reactors. Candidates should have a B.S. in Nuclear Engineering and at least 5 years of relevant experience. Strong communication skills are essential, along with familiarity with various radiation shielding software.

Benefits

Health Insurance

Disability Insurance

401(k)

Paid Time Off

Holidays

Qualifications

• At least 5 years of experience in nuclear analysis methods.
• Familiarity with variance reduction techniques in MCNP.

Responsibilities

• Perform radiation shielding design and analysis for advanced nuclear reactors.
• Conduct criticality calculations and establish upper subcritical limits.

Skills

Communication

Programming

Education

B.S. in Nuclear Engineering

Advanced degree

Tools

MCNP

SolidWorks

Python

Job description

Talascend is currently seeking an experienced Nuclear Shielding and Criticality Engineer for a long-term contract opportunity, 100% remote.

Candidates may reside anywhere in the USA; they must be eligible to work for any employer without sponsorship now or in the future.

Overview:

Our client is developing a Molten Chloride Fast Reactor (MCFR). This reactor uses a fast neutron spectrum to minimize the reactivity impact of fission products and eliminates the need for online reprocessing required in thermal spectrum molten salt reactors. The Nuclear Shielding & Criticality Engineer will utilize MCNP for radiation shielding calculations for gammas and neutrons, bringing expertise in criticality calculations and safety.

Responsibilities:

• Perform radiation shielding design and analysis for advanced nuclear reactors, including dose rates, activation rates, neutron fluence, and energy deposition calculations.
• Develop radiation source models based on material activation analysis for non-fuel in-vessel components.
• Conduct criticality calculations and establish upper subcritical limits (USLs).
• Document analysis results formally and thoroughly.

Requirements:

• B.S. in Nuclear Engineering from an accredited university; an advanced degree is preferred.
• At least 5 years of experience in nuclear analysis methods, MCNP, criticality safety, and radiation shielding calculations for gammas and neutrons.
• Familiarity with variance reduction techniques in MCNP, including surface source read/write, mesh tallies, and weight windows; experience with ADVANTG is a plus.
• Strong written and verbal communication skills, with experience working under regulatory guidelines and documenting calculations.
• Experience with NQA-1 quality program is desirable.

Preferred Skills:

• Experience with radiation shielding software such as Attila, Serpent, MAVRIC, MicroShield, SCALE, OpenMC, Whisper, PARTISN, etc.
• Proficiency with CAD tools like SolidWorks, SpaceClaim/ANSYS, or Cubit.
• Knowledge of nuclear and numerical methods, including activation analysis, dose rates, PDEs, and particle transport.
• Fast reactor experience is preferred.
• Programming skills in Python, Git, C++, Fortran, or similar languages; ability to develop professional nuclear software.

We thank all applicants for their interest. Only qualified individuals closely matching the qualifications will be contacted. Additional duties may be assigned as necessary.

Background checks and drug screens may be required.

Compensation varies based on experience and location. Talascend offers benefits including health and disability insurance, 401(k), EAP, paid time off, and holidays, with specifics depending on hire date and location.

Talascend is an Equal Opportunity Employer, committed to diversity and inclusion in the workplace.