Processed spent fuel disposal model

The purpose of this model is to represent the amount of spent fuel and its derivatives that should be managed — including processing and disposal — within the framework of a regional strategy, involving the countries that participated in the TC Regional Project RLA/4/018. 

The spent fuel turnover is described by the quantities of total U, U, total Pu, Pu and A1 shown in Fig. 19. The output of the regional conditioning plant, presented in Table IV, is described by the quantities of total immobilized spent fiiel derivatives (LILW-LL waste form), total U, U, total Pu, Pu, Al, fission products and minor actinides (Np, Am and Cm) as well as the volume of the LILW-LL waste form. Additionally, the activity of alpha emitters in the immobilized waste form and its thermal load have been calculated. The quantity and the volume of the very low level waste (VLLW) Al stream, from the disassembled structural parts of the fuel assemblies, are also shown. 

The main assumptions taken into account for the modelling were as follows  

The research reactors of the region will operate for 30 years more. 

Mean bum-up values for each country with a 2 year cooling time were considered for the spent fuel, in order to get conservative results for radionuclide quantities, alpha activity and thermal loading calculations. 

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