PENGARUH PENGISIAN BAHAN BAKAR (URANIL SULFAT) PADA TERAS AQUEOUS HOMOGENEOUS REACTOR TERHADAP KEKRITISAN

The Aqueous Homogeneous Reactor (AHR) is a non-power nuclear reactor for producing medical isotope. AHR is operated at power level of 2 MW and fueled with UO2SO4·3H2O. The fraction of fuel and water consist of 95% water and 5% UO2SO4. The enrichment of reactor fuel is 20%. AHR is operated at the temperature of 80°C. The geometry of AHR is cylindrical which has diameter of 100 cm and 100 cm height. The reactor core has a dimension of 60 cm diameter and 60 cm in height. The fuel cell geometry of AHR is hexagonal, the tube is placed inside the fuel cell that contains water as moderator and coolant. The tube is made of stainless steel-347 and UO2SO4·3H2O is placed outside the tube. Citation is used to calculate multiplication factor of the reactor core. Citation is a computer program contained in the SRAC code. After modeling the reactor core using citation and run the program, the result could be extracted from the output file. The effective multiplication of the reactor from each height level of fuel could be calculated. AHR achieves the first critical condition at 50 cm height and has a reactivity value of 0.0074