Sandia Nuclear Safety Technology

Nuclear Safety Technology of National and International Significance 

Securing the Future of Safe Nuclear Energy in the U.S. and Abroad

Modern Accident Analysis Utilizing Advanced Machine Learning

Sandia has a long history supporting the U.S. assess the safety of nuclear energy systems. We have led multiple initiatives, dating back to the 1970s, that have enhanced the safety of nuclear energy systems in the U.S. and abroad.

Securing the Future of Safe Nuclear Energy in the U.S. and Abroad

With the rapid pace of technology innovation in the U.S. nuclear energy sector, reactor safety technology is undergoing significant evolution to address the challenges posed by advanced nuclear technologies and enable a broader adoption of risk-informed, performance-based safety evaluation methods.

The research and development initiatives at Sandia are leading significant reactor safety technology innovation. We develop modern accident analysis software and utilize advanced machine learning methods to enable next generation risk-informed safety assessment.

New version of MELCOR released

On March 27, 2024 MELCOR2.2_r2024.0 was released and is available for download on Windows, MacOS and Linux. Login to downloads if you have an account. Otherwise, see the Code Distribution page.

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Sandia focuses on developing nuclear reactor safety technology in support of the U.S. and international nuclear energy sectors. The MELCOR software that we develop is nuclear safety analysis technology of national and international significance. This code was initially developed to analyze nuclear power reactor accidents, enabling assessment of the potential for consequences to public health and safety.

MELCOR is our flagship computer code used to assess accidents leading to radiological release at nuclear facilities. Used by the U.S. Nuclear Regulatory Commission as well as a range of organizations in the U.S. and over 30 nations, MELCOR is reactor safety technology of global significance.

Evolution of MELCOR

Code Development
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M2x Official Code Releases

2.2.18180December 2020
2.2.14959October 2019
2.2.11932November 2018
2.2.9541February 2017
2.1.6342October 2014
2.1.4803September 2012
2.1.3649November 2011
2.1.3096August 2011
2.1.YTAugust 2008
2.0 (beta)Sept 2006
Meeting Evolving Analytical Capability Needs
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