This paper presents an assessment of ATHENA/Modl, an extension of the RELAP5 code able to represent a number of cooling fluids, on experimental data provided by the helium facility HE_FUS3. The facility was selected to perform experimental campaigns on thermomechanics and thermal-hydrau]ics within the frame of the DEMO HCPB Blanket design programme. As a first step the characterisation tests of the facility have been used to develop an input model for ATHENA. Special models have been adopted in order to simulate some prototypical components for which the generic component models available in the code are inadequate. Later on, a preliminary assessment of this model has been performed, both for steady state and transient conditions, on the first tests conducted in the facility. In spite of the numerical weaknesses detected during the analysis, which have required special caution in the definition of the boundary condetions, the stabilised steady state has been achieved in good agreoment with the experimental data, and two accident transients of LOFA have been qualitatively well reproduced.

Assessment of ATHENA Code Capability to Simulate Helium Cooled Systems for Fusion Reactors

Dell'Orco, G.;Meloni, P.
1999

Abstract

This paper presents an assessment of ATHENA/Modl, an extension of the RELAP5 code able to represent a number of cooling fluids, on experimental data provided by the helium facility HE_FUS3. The facility was selected to perform experimental campaigns on thermomechanics and thermal-hydrau]ics within the frame of the DEMO HCPB Blanket design programme. As a first step the characterisation tests of the facility have been used to develop an input model for ATHENA. Special models have been adopted in order to simulate some prototypical components for which the generic component models available in the code are inadequate. Later on, a preliminary assessment of this model has been performed, both for steady state and transient conditions, on the first tests conducted in the facility. In spite of the numerical weaknesses detected during the analysis, which have required special caution in the definition of the boundary condetions, the stabilised steady state has been achieved in good agreoment with the experimental data, and two accident transients of LOFA have been qualitatively well reproduced.
Analisi sistemi e di sicurezza
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/3426
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