Maria S. LeTellier

Senior Consultant

B. S., Nuclear Engineering with High Honors

University of Tennessee

Senior Safety Consultant 1997-Present

C. S. Engineering Oak Ridge, TN

Continuing to support the Y-12 Nuclear Criticality Safety Organization in providing safety analyses for the restart and operation of Enriched Uranium Operations.

Senior Nuclear Safety Engineer 1996-1997

H&R Technical Associates Oak Ridge, TN

Majority of time was spent at the Y-12 Plant, providing nuclear criticality safety analysis support to the Process-Based Restart effort in Enriched Uranium Operations.

Nuclear Safety Engineer 1992-1996

Battelle Memorial Institute Oak Ridge, TN

Served in a lead engineer role. Responsibility for producing quality technical work, managing projects, acquiring business, and managing the workloads of several staff members. Primarily supported SAR upgrade efforts, criticality safety, and radiological engineering work for DOE facilities.

Engineer 1988-1992

Westinghouse Pittsburgh, PA

Bettis Atomic power laboratory

Part of the engineering group responsible for safety and operation of Navy nuclear fuel development laboratories and maintenance of old production facilities.

Research Assistant 1987-1988

University of Tennessee Oak Ridge, TN

Oak Ridge National Laboratory

Worked with Dr. John Mihalczo on nuclear instrument measurements for arms control verification purposes.

Cooperative Engineering Student 1984-1986

Martin Marietta Energy Systems Oak Ridge, TN

High Flux Isotope Reactor and Y-12 Plant

Part of the Nuclear Criticality Safety Department at the Y-12 Plant for several full-time assignments and worked on reactor systems at the HFIR for several more assignments.

DOE "Q" Clearance

Nuclear Criticality Safety

• Have analyzed storage, transportation, and process operations of various fissile solutions, dry compounds, organics, and metals.
• Currently a qualified analyst and qualified reviewer, performing complete criticality safety analyses for the Y-12 Plant Process Based Restart. These evaluations involve analysis of many forms of material using a variety of resources, including KENO V.a computer calculations.
• Conducted complete criticality safety analyses of various operations in the cascade, storage, and recovery areas of the Portsmouth Gasseous Diffusion Plant.
• Performed intense criticality accident scenario evaluations using probabilistic risk assessment methods, as part of the SAR Update Program for the Building 9212 complex at the Y-12 Plant.

Safety Analysis and Transportation

• Managed a project for quantification and selection of key accident scenarios for the Safety Analysis Update Program for the Building 9212 Complex at the Y-12 Plant. This work included process safety analysis of many chemical processing systems, using process hazard analysis and fault tree methodologies.
• Have also been involved in a risk assessment of radiation dose from liquid wastes at the Oak Ridge National Laboratory (ORNL).

• Qualified shipper of radioactive materials. Made numerous shipments of radioactive samples, fuel specimens, and waste from the Bettis Atomic Power Laboratory.

Waste Handling Operations

• Worked for the DOE Pantex Plant on shipment and disposal of radioactive mixed waste and TRU waste at the Hanford Site.
• Led a study of storage and transportation options available for handling a liquid radioactive waste stream at ORNL.
• Characterized wastes for radionuclides and hazardous constituents.
• Developed and implemented a gamma spectrometry system for analysis of packaged wastes.

Material Accountability

• Prepared nuclear material control and accountability course work for training security inspectors at the DOE Central Training Academy.
• Collected experimental nuclear instrument data at Y-12 for an arms control verification program and designed computer software for analysis and presentation of data.

Radiological Controls

• Have a comprehensive understanding of standards in radiation and contamination controls at DOE sites.
• Have written many verbatim-compliance procedures for radiological operations.

• Quantitative Methods for Hazard Evaluation, JBF Associates, Knoxville, Tennessee, 1993
• Gamma Spectroscopy, ORTEC, Oak Ridge, Tennessee, 1991
• Material Control and Accountability Inspection at DOE Central Training Academy, 1993
• 40-Hour OSHA Hazardous Waste Operator Training
• LMES General Employee, Material Access Area, Radiation Worker II Training - current
• Understanding Resource Conservation and Recovery Act, 1993
• Nuclear Criticality Safety, University of Tennessee Short Course, 1995
• Chemical Risk Assessment, Radiological Assessment Corp., 1994

• American Nuclear Society (ANS) Member since 1984.
• ANS Oak Ridge/Knoxville Local Section Vice Chair/Chair-Elect for 2001/2002 year.