Development of oecd bwr turbine trip transient benchmark for validation of coupled three-dimensional neutronics/thermalhydraulic system codes

摘要

Turbine trip (TT) in a boiling water reactor (BWR) is a sudden closure of the turbine stop valve (TSV). The pressure oscillation generated in the main steam piping propagates with relatively little attenuation into the reactor core. The core pressure induced oscillations result in dramatic changes in the core void distribution and fluid flow. THe magnitude of the neutron flux transient taking place in the BWR core is strongly affected by the initial rate of pressure rise cause by the pressure oscillation and has a strong spatial variation.