INVESTIGADORES
NIGRO Norberto Marcelo
congresos y reuniones científicas
Título:
CFD SIMULATION OF THE ATUCHA II NUCLEAR POWER PLANT REACTOR
Autor/es:
RAMAJO DAMIAN; CORZO SANTIAGO; MARQUEZ DAMIAN, SANTIAGO; NIGRO NORBERTO
Lugar:
Rosario
Reunión:
Congreso; ENIEF 2011; 2011
Institución organizadora:
AMCA
Resumen:
A CFD simulation of the Atucha II nuclear power plant reactor (PHWR) was developed. A 3Ddetailed model was employed to simulate the upper and lower plenums, the down comer and the hot-legs andcold-legs. The control rods and the coolant channel walls were also included to account for their influence onflow mixing. The behavior of the coolant channels was modeled by imposing the nominal mass flow at massand momentum sinks and sources at the location of the inlet and outlet coolant channel ports, respectively.The hydraulic zone distribution was also considered, applying different MFR according to the local coolantchannel location. In this preliminary work, the nominal mass flow rate was imposed to the channels to knowthe steady state reactor behavior. Latterly the mass flow rate through each one of the coolant channels wascalculated based on the local pressure at the channel ends at the lower and upper plenums. Simulationsallowed a deep understanding of the complex thermo-hydraulic phenomena inside the reactor plenums. Thetemperature profile and the velocity field inside the upper plenum could be visualized. This computationalmodel is the first step for developing a real time dynamic model, which will be capable to simulate unsteadyconditions and some typical operational problems like control rod stepping caused by thermal stratification inthe hot-legs or hot-leg streaming.