United States Nuclear Regulatory Commission - Protecting People and the Environment

TH28  Severe Accident Codes and Analysis Applications and Fukushima Response Activities

The NRC’s MELCOR and MACCS2 computer codes are designed to model the realistic outcomes of severe accident scenarios at nuclear power plants.  They work in conjunction to estimate possible source terms released to the environment from a severe accident and the consequences that might result from those releases.  This session will provide an overview of a variety of current applications of these computer codes, including Fukushima response activities.



  • Introductory Remarks
    Richard Lee, Branch Chief, Division of Systems Analysis, RES/NRC
  • MELCOR Applications to SOARCA and Fukushima
    Randall Owen Gauntt, Manager, Severe Accident Analysis Department, Sandia National Laboratory
  • MACCS Updates
    Nathan E. Bixler, Principal Member of the Technical Staff, Sandia National Laboratory
  • Status of Filtered Containment Venting Systems in OECD Countries
    Didier Jacquemain, Deputy Head of Severe Accident Department, Institut de Radioprotection et de Sûreté Nucléaire, France
  • SOARCA Uncertainty Analysis
    Tina Ghosh, Senior Reactor Systems Engineer, Division of Systems Analysis, RES/NRC
  • Accident Analysis of Fukushima Daiichi and Safety Measures at Kashiwazaki Kariwa NPS
    Kenji Tatewia, Manager, Nuclear Power Programs, Tokyo Electric Power Company, Washington Office


  • Matthew Humberstone, Reactor Systems Engineer, Division of Systems Analysis, RES/NRC tel: 301-251-7909, e-mail: Matthew.Humberstone@nrc.gov
Page Last Reviewed/Updated Friday, May 23, 2014