The MSR (Molten Salt Reactor) is one of the six innovative concepts of nuclear reactors envisaged by the GIF-IV (Generation IV International Forum) initiative for the long term evolution of the nuclear technology, in the direction of a more sustainable, safe, proliferation resistant, and economic power generation. The MSR is characterised by a complex and highly non-linear behaviour, which requires a careful investigation, as a consequence of some unusual features like the presence of a fluid fuel and the drift of delayed neutron precursors (DNP) along the primary loop. In this paper, the MSR core dynamics is analysed with reference to the MSRE (Molten Salt Reactor Experiment). Numerical models featured by increasing complexity are presented. In particular, a zero-dimensional model has been developed, and two other models introducing a one-dimensional discretization for the DNP drift and/or the heat convection have been also elaborated. The variety of developed models represents a starting point in the set-up of a complete simulation tool for MSR dynamics, suitable for calculations with different degrees of accuracy and numerical complexity.
Development of a Simulation Tool for a Preliminary Analysis of the MSR Core Dynamics
FIORINA, CARLO;CAMMI, ANTONIO;GUERRIERI, CLAUDIA RENATA;LUZZI, LELIO;
2010-01-01
Abstract
The MSR (Molten Salt Reactor) is one of the six innovative concepts of nuclear reactors envisaged by the GIF-IV (Generation IV International Forum) initiative for the long term evolution of the nuclear technology, in the direction of a more sustainable, safe, proliferation resistant, and economic power generation. The MSR is characterised by a complex and highly non-linear behaviour, which requires a careful investigation, as a consequence of some unusual features like the presence of a fluid fuel and the drift of delayed neutron precursors (DNP) along the primary loop. In this paper, the MSR core dynamics is analysed with reference to the MSRE (Molten Salt Reactor Experiment). Numerical models featured by increasing complexity are presented. In particular, a zero-dimensional model has been developed, and two other models introducing a one-dimensional discretization for the DNP drift and/or the heat convection have been also elaborated. The variety of developed models represents a starting point in the set-up of a complete simulation tool for MSR dynamics, suitable for calculations with different degrees of accuracy and numerical complexity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
