
SIMULATE5 maintains the proven, easy-to-use input/output formats of its predecessors - allowing users to model light water reactor cores loaded with fuel from any vendor consistently and accurately. In-core instrumentation for power monitoring, including 235U fission chambers, rhodium and platinum detectors, gamma and neutron TIPs, vandadium aeroballs, and gamma thermometers.Integrated burnable poisons (gadolinia, erbia, IFBA), removable poisons (WABA, Pyrex), and a combination of both.SIMULATE5 efficiently and accurately verifies core loading pattern designs even with complicated core designs containing: Shutdown cooling and pin power reconstruction are now more accurate than ever before, making for better thermal margin calculations and more accurate isotopic inventories. SIMULATE5 has native support for inputting as-built enrichment and loading values, ensuring that the model is as close to what’s actually in the core as possible. The microscopic depletion model improves history modeling for more efficient power maneuvering over long-length cycles. The improvements in SIMULATE5’s calculation engine dramatically increase the accuracy of cycle eigenvalue behavior, cycle length predictions, cold critical eigenvalue, and startup predictions for heterogeneous cores and long cycle lengths. Better Fuel Management: Validate and Verify Vendor Designs With practical defaults for PWRs and BWRs, robust error checking, and seamless interfaces to other Studsvik core analysis tools, SIMULATE5 allows engineers to spend their time analyzing, not troubleshooting software. The SIMULATE5 input format is simple to use, allowing free-format input capable of modeling complex core layouts and includes automated functions to simplify tedious engineering calculations. Special Projects: Steaming rate calculations, channel bow modeling, fixed-source calculations, power adaption.Control Rods: Rod depletion, fluence tracking, pattern searches, stuck rod analysis.

Fuel Integrity: Thermal limits (BWR), Power-dependent limits (PWR), PCI analysis, 3D shutdown margin calculations.Core Follow and Operational Support: Automated reactivity coefficient calculations, rod worth calculations, and multi-criteria searches.Fuel Management: Loading pattern validation, cycle length prediction, technical data book.Several new automated engineering features have been incorporated into the core product to accompany the long list of existing features: SIMULATE5 is built on over 25 years of real-world engineering experience. Engineering Applications: Automated Calculations
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Taking full advantage of multi-core processors, reactor simulation run-times can be reduced significantly. SIMULATE-5 has been parallelized to support multi-platform shared-memory parallel programming on all architectures. The multi-group pin power module captures instantaneous spectral effects, the actinide tracking on the assembly submesh describes exposure-induced pin power variations. In the improved pin power reconstruction module of SIMULATE5, the heterogeneous pin powers are calculated by modulating homogeneous multi-group pin powers from the submesh solver with pin form factors from single-assembly CASMO5 lattice physics calculations. Radially, the assembly is divided into heterogeneous submeshes, thereby overcoming the shortcomings of spatially-averaged assembly cross-sections and discontinuity factors generated with zero net-current boundary condition. Heterogeneities in the axial direction of an assembly are treated explicitly. Cross sections are described by a hybrid microscopic-macroscopic model that includes approximately 50 heavy nuclides and fission products (17 actinides, 30+ fission products and burnable absorbers).

SIMULATE5 solves the multi-group diffusion or, optionally, the simplified P3 equations. Improvement of the pin power reconstruction to treat detailed local pin isotopic as well as representation of intra-assembly flux shape in more detail.Improvement of the radial rehomogenization model to significantly improve modeling of bundle heterogeneities.

