Pemodelan dinamik pendinginan bahan bakar nuklir bekas reaktor riset secara natural konveksi pada prototipe dry cask storage

This study specifically aims to test the feasibility of dry cask storagedesign as a solution for storing spent nuclear fuel (SNF) in Indonesia. Due to the limited storage space in wet type storage, this research designed, experimented and simulated simultaneously.The canister design test varies the voltage from 50 Vto 125V with closed conditions to determine the response of the canister to the voltage which is proportional to the decay heat of SNF. Experiments using dry cask storage ventilation varying the voltage from 100 Vto 175 V which aims to test dry cask storage against convection natural canister cooling. Theoretical calculations and simulations using software were also carried out as a comparison of the experimental results in terms ofnaturally convectioncoolingand thermal resistance.The experimental results show the response of the canister design to function properly, the greater the voltage supplied, the higher the canister temperature, 50 V to 125 V responds from 33.4°C to 56.6°C. The canister cooling test by natural convection showed good results,the dry cask ventilation opening and closing method showed a decrease in canister temperature at a voltage of 100 Volts of 16.1 °C and 14.8 °C at 125 V.The canister temperaturecomparison between experiments, theoretical calculations and simulations at 175 Vare 44.9 °C, 49.7 °C and 65°C respectively,asfor velocity are 0.20 m/s, 0.25 m/s and 0.39 m/s respectively. The results of theoretical calculations and simulations are slightly higher than experiments, thisis due to heat loss to the environment during the experiment. The simulation results obtained temperature contours and natural convection flow behavior in the air gap, indicating the dry cask storage design is functioning properly