Nuclear Data and Criticality Safety

Nuclear Data and Criticality Safety

The Nuclear Data and Criticality Safety Group is part of the Reactor and Nuclear Systems Division within the Nuclear Science and Engineering Directorate at Oak Ridge National Laboratory where it is responsible for providing nuclear data support for current and emerging nuclear applications. NDCS staff possess a broad range of physics and nuclear engineering expertise that is used to provide nuclear data support to a variety of sponsors including ORNL divisions and programs, Department of Energy (DOE) Offices and laboratories, the U.S. Nuclear Regulatory Commission (NRC), and the nuclear industry.


Covariance Applications in Criticality Safety, Light Water Reactor Analysis, and Spent Fuel Characterization

Uncertainties in Used Nuclear Fuel decay heat for various cooling times. (hi-res image) A new covariance data library based on ENDF/B-VII.1 was recently processed for the SCALE...

Axial Moderator Density Distributions, Control Blade Usage, and Axial Burnup Distributions for Extended BWR Burnup Credit (NUREG/CR-7224, ORNL/TM-2015/544)

Applications for certificates of compliance for spent nuclear fuel (SNF) dry storage and transportation systems must include criticality safety analyses demonstrating that these systems are...

Bias Estimates Used in Lieu of Validation of Fission Products and Minor Actinides in MCNP Keff Calculations for PWR Burnup Credit Casks (NUREG/CR-7205, ORNL/TM-2012/544)

The U.S. Nuclear Regulatory Commission Division of Spent Fuel Management issued Interim Staff Guidance (ISG) 8, Revision 3 in September 2012. This ISG provides guidance for NRC Staff review of burnup...


Provide integrated nuclear data, modeling & simulation, and nuclear criticality safety analysis capabilities to enable innovative technical solutions for nuclear technology applications.


Leverage expertise in nuclear criticality safety, nuclear data, and analytical methods/software development to conduct R&D involving analyses and nuclear methods development to provide problem-solving tools, technical solutions, and guidance to customers within DOE, NRC, and other government and private organizations.

Major Sponsors:

DOE National Nuclear Security Administration

U.S. Nuclear Regulatory Commission

DOE Office of Nuclear Energy

DOE Office of Environmental Management


Douglas G Bowen

Group Leader, Nuclear Data and Criticality Safety Group

Group Members

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