The ITER tokamak is under construction in France and the EU hopes to produce the first kWh from the magnetically-confined fusion reactor DEMO by mid of this century. The superconducting magnet system guarantees the plasma confinement and is the most expensive component of the reactor. Here we present a first step in the analysis of accidents, which may occur in a tokamak magnet system. An undetected Loss-of-Flow Accident (LOFA) in the ITER Toroidal Field (TF) magnets during a standard plasma pulse is simulated with the validated 4C thermal-hydraulic code. The evolution of the most relevant thermal-hydraulic variables is computed and compared with the nominal operation to show deterministically the consequences of the LOFA. The accident can lead to a quench of the magnet, a transient which can cause a damage of the component—with consequent loss of plasma confinement and reduced availability of the machine.

Analysis of a Loss-of-Flow Accident (LOFA) in a tokamak superconducting toroidal field coil / Savoldi, Laura; Bonifetto, Roberto; Zanino, Roberto. - CD-ROM. - (2017), pp. 67-74. ((Intervento presentato al convegno European Safety and Reliability Conference (ESREL) tenutosi a Portoroz (Slovenia) nel June 18-22, 2017 [10.1201/9781315210469-10].

Analysis of a Loss-of-Flow Accident (LOFA) in a tokamak superconducting toroidal field coil

SAVOLDI, LAURA;BONIFETTO, ROBERTO;ZANINO, Roberto
2017

Abstract

The ITER tokamak is under construction in France and the EU hopes to produce the first kWh from the magnetically-confined fusion reactor DEMO by mid of this century. The superconducting magnet system guarantees the plasma confinement and is the most expensive component of the reactor. Here we present a first step in the analysis of accidents, which may occur in a tokamak magnet system. An undetected Loss-of-Flow Accident (LOFA) in the ITER Toroidal Field (TF) magnets during a standard plasma pulse is simulated with the validated 4C thermal-hydraulic code. The evolution of the most relevant thermal-hydraulic variables is computed and compared with the nominal operation to show deterministically the consequences of the LOFA. The accident can lead to a quench of the magnet, a transient which can cause a damage of the component—with consequent loss of plasma confinement and reduced availability of the machine.
978-1-138-62937-0
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2677995