Multiscale and multisolver pin power reconstruction approach in a reactor core calculation

A. Targa (1, 2) , P. Le Tallec (2) , J.-C. Le Pallec (1)

1 X - École polytechnique
2 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

In the framework of the CEA scientific research on multiphysics and multiscale coupling in nuclear reactor modeling, our main interest lies within Rod Ejection Accidental situations that may occur in Pressurized Water Reactors (PWR). This accident is characterized by a strong interaction between the different areas of the reactor physics (neutronics, thermal fuel mechanics and thermal hydraulics) and a heterogeneous and dissymmetrical spatial deposit of power on the fuel pin and the coolant, which might jeopardize the fuel pin. In this context, accurate representations of neutron flux distribution are needed. In this paper we focus only on the discipline of neutronics and more precisely on the reconstruction of the coarse power distribution over the whole core in order to obtain the accurate and realistic localization and deposit of the power inside some interesting subdomains of the core.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]

A. Targa, P. Le Tallec, J.-C. Le Pallec. Multiscale and multisolver pin power reconstruction approach in a reactor core calculation. ICAPP 2015 - International Congress on Advances in Nuclear Power Plants, May 2015, Nice, France. ⟨cea-02509271⟩