AbstractTo ensure an optimal application of fuel behavior codes, international standard problems (ISPs) are performed by the Nuclear Energy Agency of the Organization for Economic Cooperation and Development. Calculations performed with complex fuel analysis codes consume considerable implementation and running times. To avoid the application of these codes, a fast-running deformation code was extended to a fuel behavior code called BALO-2A. With this code, two standard problems were performed: ISP-14, which is based on the bundle experiment REBEKA-6, and ISP-19, performed at the Phebus facility. In each standard problem, different methods have to be applied to obtain boundary conditions and input values. The results indicate that BALO-2A simulates fuel behavior under loss-of-coolant accident conditions quite well.