Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Prasad Vegendla Project Name: NE_RANS Division: NE Project title: RANS-based CFD for Nuclear Reactors Associated funding: DOE-NE, GTRI, CRADA-Cummins Other Systems: NE Division clusters Science: The commercial CFD code STAR-CCM+ (and its predecessor STAR-CD) have been employed at Argonne for nuclear reactor analysis for more than 10 years in a variety of applications. The objective is to predict the pressure, velocity and temperature distribution in nuclear reactor cores and coolant systems to ensure that the reactor is sufficiently cooled during normal operation and remains cool during postulated adverse events. Other design goals include minimizing the local peaks in power and temperature. The physics depends on the reactor and scenario being analyzed, but often includes turbulent flow, buoyancy-driven naturally circulating flows, conjugate heat transfer, and multiphase flows. In addition, the geometry is often quite complex, which requires computationally intensive mesh generation procedures. Project description: Anticipated CFD support of nuclear reactor analysis in FY16 includes: • Supporting NNSA’s efforts under the GTRI-Convert program to convert research reactors fueled with highly-enriched uranium to instead employ low-enriched uranium, and in doing so reduce the associated proliferation risk. Such reactor conversions require significant analysis to ensure that their cool ability under a range of conditions. Given the range of geometry and flow conditions presented by the various research reactors under consideration, a general-purpose thermofluid analysis capability—like CFD—is required. • Supporting advanced reactor systems modeling by coupling STAR-CCM+ to system codes for transient analysis of postulated adverse events, to ensure that the reactor remains cool even under highly unlikely multi-component failures. • Supporting advanced modeling and simulation efforts under the DOE-NE NEAMS program by integrating STAR-CCM+ into the SHARP reactor analysis package. By including STAR-CCM+ as an optional component in SHARP will provided needed flexibility and enhance the access for new users to the advanced modeling and simulation toolkit. • Support of design and safety analysis of sodium-cooled fast reactors for the DOE-NE Advanced Reactor Concepts program. • Verification and validation of STAR-CCM+ for nuclear rector analysis. • In work for others program, several STAR-CCM+ simulation runs are planned to optimize the aerodynamic and underhood thermal analysis of the heavy-duty vehicles. STAR-CCM+ has been employed by analysts in the Nuclear Engineering Division on LCRC clusters since its inception (both Jazz and Fusion), and has demonstrated good scalability up to several hundred cores. Recent simulations on 720 Fusion cores reported only 15% overhead associated with MPI communication. This project will be used by 5-10 STAR-CCM+ analysts in the NE Division. Industry partnership: Cummins Inc. Columbus, Indiana Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 1000000 Q1: 250000 Q2: 250000 Q3: 250000 Q4: 250000 Justification: STARCCM+ is a highly scalable tool on fusion. NE users demonstrated good scalability up to several hundred cores. Recent simulations on 720 Fusion cores reported only 15% overhead associated with MPI communication. Storage requirements: Thank You, The LCRC Accounts System