Evaluation of Radionuclide Inventory in the CAREM-25 Small Modular Reactor (M. Budi Setiawana), S. Kuntjoro, P. M. Udiyani and I. Husnayani

Abstract. CAREM-25 is an Argentina national nuclear power plant project based on PWR technology. It is designed as a
small modular reactor (SMR) of 100MWt which has more flexibility in its construction and maintenance. SMR-type
power plant is considered suitable to be deployed in archipelagoes country such as Indonesia. For the purpose of safety
analysis, it is necessary to calculate radionuclide inventory from the reactor core under operating conditions. The
radionuclide inventory of materials irradiated in a reactor depends on the initial material composition, burn-up history
and the power peaking factor. The purpose of the present work is to evaluate radioanuclide inventory in fuel materials of
CAREM-25 in the normal operational condition. ORIGEN-2 code was used through the calculation. The computational
result of the relative contribution to the total radionuclide inventory of CAREM-25 is: Halogen group has the largest
activity of 2.089E+07 Ci (~7.729E+17 Bq), the other groups are: the Rare Gases group (Kr and Xe) is about 8.499E+06
Ci (~3.144E+17 Bq); Alkali metal (Cs) group is 1.732E+05 Ci (~6.408E+15 Bq), Tellurium group: 2.470E+06 Ci
(~9.139E+16 Bq), Strontium and Barium group: 5.494E+06 Ci (~2.032E+17 Bq), Noble Metal group: 3.175E+06 Ci
(~1.175E+17 Bq), Lanthanide group: 8.432E+06 Ci (~3.119E+17 Bq) and Cerium group: 5.187E+06 Ci (~1.919E+17
Bq).
Keywords: Small Modular Reactor, CAREM-25, radionuclide inventory, ORIGEN-2