Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Rui Hu Project Name: SHARP-IF Division: NE Project title: SHARP – Intermediate Fidelity Modeling Associated funding: DOE-Nuclear Energy Other Systems: Science: An intermediate fidelity (IF) modeling method is being pursued under NEAMS Reactor IPSC (SHARP) for a fast-running, modest-fidelity, whole-core transient analyses capability. The approach is essential for design scoping and engineering analyses and could lead to improvements in the design of the new generations of reactors and to the reduction of uncertainties in safety analysis. The IF method relies on RANS based turbulence modeling approach and advanced system modeling methods to represent the fluid flow and heat transfer physics. Project description: The system analysis code and the RANS-based commercial CFD code STAR-CCM+ are incorporated into the SHARP framework for a multi-scale analysis of Sodium Fast Reactors. In the previous fiscal year, the feasibility of performing coupled SAS/STAR-CCM+ simulations of protected loss-of-flow accident was demonstrated. In that effort, the outlet plenum was modeled by STAR-CCM+ and the rest of the primary coolant system and the secondary system were simulated by SAS, and the flow and temperature conditions at the interface were exchanged between the two codes as boundary conditions. Recently, a new system analysis code, SAS11 is being developed to simulate the integrated multi‐physics performance of the entire power plant. It still relies on lumped parameter representations of the fluid mechanics, structural mechanics, and heat transfer physics. However, the physics models, numerical methods, and the software structure have been greatly improved from the legacy code SAS4A/SASSYS-1. In the planned activities for FY13, the SAS11 code will be used for whole-plant simulations of SFR systems. Its validity to model protected loos-of-flow and unprotected loss-of-flow accidents will be examined. Additionally, it will be coupled with CFD code STAR-CCM+ for the same transient simulations, in which the two codes simulate different domains of the system and the flow and temperature conditions at the interface will be exchanged between the two codes as boundary conditions. Furthermore, the CFD code STAR-CCM+ will be used for design evaluations of reactor systems or experimental facilities. Notably, the natural convection shutdown test facility that is currently being built will be examined by CFD simulations. This type of simulations is essential for the design of the instrumentation system. Also, the pre-test simulation results will be compared against to the experimental results as a validation study of the CFD code. At Argonne, the CFD code STAR-CCM+ are routinely applied to simulations that use more than 100 cores, and good parallel performance has been observed. As problem size increases, i.e. for finer meshes and for large pin bundles, larger numbers of cores would be utilized and based on data from the developers good parallel performance will continue to be expected. On the other hand, SAS11 is a new development. The parallelization will be provided by the underlying MOOSE framework which is built on PETSc. The scalability of MOOSE has been demonstrated by other MOOSE-based applications. The system code usually relies on coarse representation of the system thus does not require significant amount of computing resources. Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 112000 Q1: 80000 Q2: 10000 Q3: 10000 Q4: 12000 Justification: Thank You, The LCRC Accounts System