Accessing ASCR Facilities

ASCR Leadership Computing Challenge (ALCC)

ALCC Mission

The mission of the ASCR Leadership Computing Challenge (ALCC) is to provide an allocation program for projects of interest to the Department of Energy (DOE) with an emphasis on high-risk, high-payoff simulations in areas directly related to the DOE mission and for broadening the community of researchers capable of using leadership computing resources.

Call for Proposals

Congratulations to our 2016 ALCC awardees. The call for 2016 ALCC cycle is closed. If you wish to submit an off-cycle ALCC application, please contact the ALCC program manager, Carolyn Lauzon.

ALCC supports projects that advance the DOE mission and further the goals of DOE program offices. For 2016 ALCC, projects of special interest to the DOE include the following:

  • Advancing energy efficiency and the clean energy agenda.
  • Ensuring nuclear reactor safety and effective environmental management of nuclear waste.
  • Enabling mesoscale materials science.
  • Enabling and performing predictive simulation of chemical processes.
  • Simulating the Dark Universe, Understanding the High Energy Higgs sector, Lattice Gauge theories probing beyond the Standard Model and other topics of importance to the DOE High Energy Physics Program.
  • Enabling Lattice QCD, other simulations of low energy nuclear physics, or simulations of nuclear astrophysics problems.  Problems relevant to experimental research programs at DOE Nuclear Physics facilities are of particular interest.
  • Advancing a robust predictive understanding and capability across scales and systems for Climate Science.
  • Advancing Earth Science, Environmental Science, and Subsurface Technology particularly as relates to energy resources, the carbon cycle and sequestration, and environmental management.
  • Developing new solutions for Big Data intersections with leadership computing.
  • Broadening the community of researchers capable of using next generation leadership computing resources.
  • Exploring new frontiers in physical, biological, and computational science.

Congratulations to our 2016 Awardees.

For 2016, 49 awards were made totaling 3 billion processor hours. For a listing of 2016 awarded projects see Past Awards.

Overview of ALCC

Open to scientists from the research community in industry, academia, and national laboratories, the ALCC program allocates up to 30% of the computational resources at ASCR’s supercomputing facilities. ASCR supercomputing facilities include NERSC at Lawrence Berkeley National Laboratory and the Leadership Computing Facilities at Argonne and Oak Ridge National Laboratories. These resources represent some of the world’s fastest and most powerful supercomputers.

ALCC is one of several allocation programs for ASCR supercomputing facilities (see ASCR Allocation Policy.pdf file (23KB)) and supports our efforts to further DOE mission science and to broaden community access to leadership computing facilities. To fulfill its goal of broadening community access, ALCC supports a wide range of project allocation sizes and allocates time across all three ASCR supercomputing facilities.

ALCC grants one year awards. In 2015, 43 ALCC awards were granted amounting to 2.9 billion processor hours with projects ranging in size from 5 to 175 million processor hours. Scientific discovery advanced by ALCC allocations range across the DOE mission space include (but not limited to) energy efficiency, computer science, climate modeling, materials science, bioenergy, and basic research. (See ALCC Past Awards and Awardees).

ALCC Resources

ALCC allocates high performance computing time on the primary HPC machines at each ASCR facility. For a description of the computing resources at ASCR facilities, please see

See right side bar for more ALCC information links.

Last modified: 5/19/2016 2:19:34 PM