Neutronics Design and Analysis of the 50 WMe Novel Modular BWR (NMR-50) with Multi-physics Simulation Code System

Zeyun Wu (Purdue University)

The design motivation of the NMR-50 at Purdue University is to combine new passive safety features with the latest BWR technologies and to demonstrate its performance and safety characteristics in the regime of small modular reactor (SMR). In accordance with this objective, fundamental neutronics design and analysis on the NMR-50 are required to enhance passive safety characteristics and to reduce construction and operation costs. One key design objective for the NMR-50 in neutronics perspective is to achieve a long life core (about 10 years) operation without violating the thermal-hydraulics and material related design criteria. This talk presents the recent research efforts on the design and analysis of the NMR50 through neutronics and thermal-hydraulics coupled calculations with computational code suits CASMO/PARCS/RELAP5. Firstly, a systematic and parametric study on the fuel assembly design is carried out based on both GE and AVERA type assemblies to obtain best design performance in the regards of fuel cycle length and other safety related parameters. Secondly, a whole core design and cycle analysis of the NMR-50 is performed to achieve the design objective while satisfying all the concerned design criteria.

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