This work has been performed within the framework of the ANSALDO-ENEA collaboration for the ADS-DF project. A detailed neutronic analysis of the system in the absence of the external source has been carried out by means of Eranos code ver. 1.2. Exploiting the usual calculation schema adopted by deterministic codes (cell and spatial calculations), a deep investigation about the impact of different cell calculation methodologies on the ADS-DF reactivity levai has been performed.In the ADS-DF neutronic analysis, the most criticai aspects concern: the treatment of the fuel - dummy reflector interfaces (since the cell code in Eranos has been developed for the treatment of fertile blanket reflectors), the presence of the internai source channel, the energy treatment of the LBE coolant and some isotopes of the stainless steel composing the cladding and shields (not known in the finest energy structures). This work develops a parametric study focused on these aspects, evaluating the impact on the reactivity of each contribute. The peculiarity is that, in addition to the usual cell calculation schemes, an iterative procedure of generai validity is suggested and tested on the ADS-DF to treat correctly the spatial-angular effects already in the cell calculation phase.
The impact of different cell calculation methodologies on the calculated ADS-DF reactivity level
Peluso, V.;Sarotto, M.
2003-07-17
Abstract
This work has been performed within the framework of the ANSALDO-ENEA collaboration for the ADS-DF project. A detailed neutronic analysis of the system in the absence of the external source has been carried out by means of Eranos code ver. 1.2. Exploiting the usual calculation schema adopted by deterministic codes (cell and spatial calculations), a deep investigation about the impact of different cell calculation methodologies on the ADS-DF reactivity levai has been performed.In the ADS-DF neutronic analysis, the most criticai aspects concern: the treatment of the fuel - dummy reflector interfaces (since the cell code in Eranos has been developed for the treatment of fertile blanket reflectors), the presence of the internai source channel, the energy treatment of the LBE coolant and some isotopes of the stainless steel composing the cladding and shields (not known in the finest energy structures). This work develops a parametric study focused on these aspects, evaluating the impact on the reactivity of each contribute. The peculiarity is that, in addition to the usual cell calculation schemes, an iterative procedure of generai validity is suggested and tested on the ADS-DF to treat correctly the spatial-angular effects already in the cell calculation phase.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
