This work was carried out in the CDT/FASTEF EU FP7 project: it deals with the preliminary core design of MYRRHA-FASTEF, a 100 MW LBE cooled reactor (working in both criticai and sub-critical modes) that should be able to demonstrate transmutation and associated technology. The report summarizes the presentation done at the WP2 meeting at the SCK-CEN Headquarters in Brussels on January 19-21, 2011. It describes the current frozen design of the criticai core (68 FA, 151 SA) and its characterisation by the ERANOS 2.1 deterministic code. The accuracy of the model, based on (preliminary) mechanical drawings, was verified by comparing the main results of the analysis with the MCNPX ones supplied by SCK-CEN: the main outcome is the optimal agreement at BoL between deterministic and Monte Carlo methods. Another remarkable result is represented by the definition of the dummy (radial reflector) region: almost two rings in the periphery of the core lattice, which can have different LBE mass flow rates. The structure of the two different kinds of dummy Sub-Assembly (SA) was chosen by looking for a good compromise among the aimed high flux, the fuel enrichment (Pu mass content in MOX) and the level of damage on core barrel. The second part of the presentation defines some details of the WP2/T2.2 work plan for the near future. The main concerns are: - the definition and simulation of the equilibrium sub-cycle core; - some safety criteria related to the requirements of the shutdown systems provided by AREVA
The current frozen design of the FASTEF critical core (151 SA): ERANOS model based on mechanical drawings (& referred to MCNPX). Some proposals for T2.2/D2.2: definition and simulation of the equilibrium sub-cycle core
Sarotto, M.
2011-07-12
Abstract
This work was carried out in the CDT/FASTEF EU FP7 project: it deals with the preliminary core design of MYRRHA-FASTEF, a 100 MW LBE cooled reactor (working in both criticai and sub-critical modes) that should be able to demonstrate transmutation and associated technology. The report summarizes the presentation done at the WP2 meeting at the SCK-CEN Headquarters in Brussels on January 19-21, 2011. It describes the current frozen design of the criticai core (68 FA, 151 SA) and its characterisation by the ERANOS 2.1 deterministic code. The accuracy of the model, based on (preliminary) mechanical drawings, was verified by comparing the main results of the analysis with the MCNPX ones supplied by SCK-CEN: the main outcome is the optimal agreement at BoL between deterministic and Monte Carlo methods. Another remarkable result is represented by the definition of the dummy (radial reflector) region: almost two rings in the periphery of the core lattice, which can have different LBE mass flow rates. The structure of the two different kinds of dummy Sub-Assembly (SA) was chosen by looking for a good compromise among the aimed high flux, the fuel enrichment (Pu mass content in MOX) and the level of damage on core barrel. The second part of the presentation defines some details of the WP2/T2.2 work plan for the near future. The main concerns are: - the definition and simulation of the equilibrium sub-cycle core; - some safety criteria related to the requirements of the shutdown systems provided by AREVAI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
