United States Nuclear Regulatory Commission - Protecting People and the Environment

MELCOR Accident Consequence Code System (MACCS)

Sponsored by the Office of Nuclear Regulatory Research

The NRC developed the MACCS code to evaluate the consequences of severe radiological accidents. Analyses done with MACCS are used as input to environmental reports and environmental impact statements for early site permits, support plant specific evaluations of severe accident mitigation alternatives required as part of the environmental assessment for license renewal, assist in emergency planning, and provide input to cost benefit analyses. The poster provides information on the latest improvements to the MACCS code suite, discusses recent applications of MACCS, and describes how to obtain the code.

Page Last Reviewed/Updated Friday, June 09, 2017