Verification of new modelling in HFR-TEDDI. DOT-3.5 calculation of a 450/1000 HFR fuel element in 27 energy groups

摘要

The main goal of this work is to compare the effective multiplicity factor obtained by a 27 energy groups DOT-3.5 calculation of a 450/1000 HFR fuel element (450 g (sup 235)U and 1000 mg (sup 10)B) with the k(sub eff) of a flipped plate geometry of the fuel element, calculated by DOT-3.5. The geometry of the fuel element with the flipped plates represents a one dimensional (1-D) model used in 1-D calculations that will eventually lead to the new HFR-TEDDI model of fuel elements. In order to compare the calculations of the actual and flipped plate geometry of the fuel element both are modelled with a 2-D transport code. Also the thermal and fast energy fluence rate obtained from the DOT-3.5 calculation will be compared for the actual geometry and the flipped plates geometry. The work was done for project number 1263; updating the HFR-TEDDI reactor code, especially introducing a new model for the description of a HFR fuel element. More detailed information about the proposal for this new model will be reported. (author). 5 refs.; 10 figs.; 4 tabs. (Atomindex citation 23:059712)