ASC Dedicated Application Time Request
Tri-Laboratory and University Alliance Center scientists and engineers primarily access the LLNL Advanced Simulation and Computing (ASC) systems through an automated resource management and accounting tool that obeys a developed policy for routine computing. When necessary, users may also receive expedited access to the systems that would allow them to run larger problems for longer periods of time. The “non routine” runs need to be justified on the basis of their priority to the program. This form lets you submit a request for a priority run on Cab, Sequoia, or Vulcan.
Here's a more detailed explanation of the: Policies for Expedited Priority Runs on LLNL ASC Platforms