Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Mike Smith Project Name: SHARP_Neutronics Division: NE Project title: SHARP - Neutronics and CFD Coupling Associated funding: DOE-Nuclear Energy Other Systems: Science: To produce detailed, repeatable validation problems for the DeCART code on common thermal reactors such as Pressurized Water Reactors (PWRs), Boiling Water Reactors (BWRs), and Very High Temperature Reactors (VHTRs). Some amount of this work will require using the multi-physics coupling capability which links DeCART to STAR-CCM+. To continue the validation process of PROTEUS by modeling drawer-wise homogenized Zero Power Reactors (ZPR), Zero Power Plutonium Reactors (ZPPR) and assembly homogenized fast reactor models. ZPPR-21, ZPPR-15, ZPR-6 and ZPR-9 are the targeted experiments which include criticality estimates and reaction rate (foil) measurements. MONJU restart calculations and some select EBR-II and PHENIX calculations are also being considered. Project description: The SHARP project is funded under the neutronics component of NEAMS which is a program under the Advanced Modeling and Simulation Office (AMSO) of DOE-NE. The projects funded this year include verification and validation work on the DeCART thermal reactor analysis tool and follow on validation work for the PROTEUS fast reactor analysis tool (used to call this UNIC). We currently have three different versions of DeCART specific for treating PWR, BWR, and VHTR reactors. The NEAMS objective is setup verification problems for each version which will be done on a local NE machine. In addition to this we are going to produce validation calculations which provide information about the fidelity and validity of the DeCART tool when applied to the various thermal reactor concepts. These validation calculations include code to code comparisons (likely against Monte Carlo) and comparisons with experiments. It is this latter task that we need time on fusion to accomplish the work. In addition to these verification and validation work, an additional task is focused on performing a coupled thermal-hydraulic, neutronics demonstration calculation. The PROTEUS work was previously being done on BlueGene/P and considered homogenized and heterogeneous problem modeling. The change in focus of NEAMS negates the importance of the heterogeneous modeling at this time (it perhaps will be revisited in the exa-scale hub), but the homogeneous modeling requirements are still necessary and can be accomplished on Fusion. Previous to FY10, the NEAMS work was heavily focused on code development with only minor consideration to verification and validation of the toolset. In FY10, some effort was devoted to building homogeneous models where both criticality and detailed foil measurements provide the reference solution. Given the complexity of the physical data and inherent errors, the practical method for building a validation case for neutronics is to use the tool on a wide range of experiments that are similar to the proposed end use of the tool such that the typical bias in the modeling methodology can be estimated. Both DeCART and PROTEUS (MC2+SN2ND) can utilize 100s of processors with reasonable to excellent scalability. From the FY11 allocation, a full core VHTR calculation using DeCART is known took 1500 cpu-hours which is not practical on serial workstations. For drawer-homogenized ZPR-6/7 calculation, a SN2ND 70 group calculation with refined space-angle approximations required 11 cpu-core hours on fusion. These problems represent the large end range of calculations although we anticipate using 116 groups in SN2ND (25 core-hours) in some instances. For DeCART we will be running a minimum of three problems per reactor type each of which will likely require 5-10 attempts to adjust spatial and angular meshing. Consequently, we can expect to spend on the upper range of 135,000 core-hours on the DeCART work. The additional coupling calculations should be solvable using this same time assuming that we can request additional time as necessary. For SN2ND, we have effectively 15 ZPR/ZPPR pr oblems (configuration + experiment) we want to run in FY12, each of which will require 25 individual calculations (most taking less than 11 cpu-core hours) to adjust the spatial, angular, and energy meshing. In total we anticipate the PROTEUS modeling will require a maximum of 4000 core-hours, however, from past experience there will be some desire to attempt some partially heterogeneous calculations on the foil calculations which can dramatically increase the cpu-core hours. As a consequence, 5000 core-hours is not an unreasonable estimate of the total time required by PROTEUS on fusion. In total, we believe that 140,000 core-hours will be sufficient for this work where the DeCART work will primarily fall in the first three quarters and the PROTEUS work will be spread out evenly over the full year. Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 140000 Q1: 25000 Q2: 40000 Q3: 40000 Q4: 35000 Justification: Thank You, The LCRC Accounts System