Abstract
This paper continues a series of studies in which the Serpent 2 Monte Carlo code is used for producing homogenized group constants for the ARES core simulator. The test case is the MIT BEAVRS benchmark, which involves the detailed description of a 1000MW Westinghouse PWR core and the operating data for the first two cycles. Previous initial core hot zero-power calculations are extended to full power conditions and fuel cycle simulation. The results of the Serpent-ARES code sequence are compared to a reference Serpent 3D calculation and experimental data provided with the benchmark specification. It is concluded that the results are in good agreement. This study also demonstrates that the Monte Carlo method can be a viable, albeit computationally expensive option for group constant generation, even if the procedure involves accounting for fuel burnup and covering the full range of reactor operating conditions.
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