Senior Nuclear Criticality Safety Architect

Protingent; Oak Ridge (TN); On-site; USD 120,000 - 180,000; Full time

Job summary

Protingent seeks a Lead Nuclear Criticality Safety Engineer in Oak Ridge, TN to drive safety analyses and ensure subcritical configurations across fuel handling, storage, and transport. You will develop and defend criticality evaluations, coordinate with design and logistics teams, and lead HALEU-related safety work.

The role requires deep expertise in MCNP/ SCALE, ANSI/ANS-8 standards, and ASME NQA-1 with strong QA discipline. Onsite work with a focus on moving and storing nuclear material.

Qualifications

• Requires degree in Nuclear Engineering, Physics, or related technical field.
• 5+ years of nuclear criticality safety experience with authorship and defense of evaluations.
• Demonstrated ability to validate computa tional methods and subcritical margins.
• Familiarity with ANSI/ANS-8 standards and related safety controls.

Responsibilities

• Perform criticality safety analyses for fuel movement and transport to reactor sites or between facilities.
• Define and validate storage configurations for fresh and spent fuel to maintain subcritical margins.
• Model and analyze accident scenarios (inadvertent moderation, geometry changes) to support controls.
• Collaborate with fuel design, performance, and transport teams to ensure safe configurations.
• Anchor evaluations and reports under configuration control per NQA-1 and regulatory standards.
• Define and approve safety basis for HALEU-bearing materials and related shipments.

Skills

Criticality safety leadership

MCNP/SCALE/KENO

Computational methods

Nuclear QA & NQA-1

ANSI/ANS-8 standards

HALEU experience

Fissile material handling

Education

Nuclear Engineering degree

Tools

ASME NQA-1 compliance

10 CFR Part 50 Appendix B

Job description

Protingent seeks a Lead Nuclear Criticality Safety Engineer in Oak Ridge, TN to drive safety analyses and ensure subcritical configurations across fuel handling, storage, and transport. You will develop and defend criticality evaluations, coordinate with design and logistics teams, and lead HALEU-related safety work.

The role requires deep expertise in MCNP/ SCALE, ANSI/ANS-8 standards, and ASME NQA-1 with strong QA discipline. Onsite work with a focus on moving and storing nuclear material.