[en] The objective of this work is the development of a computer program to analyze the performance of monolithic fuel plates of uranium-molybdenum when subjected to operating conditions under steady state in pressurized light water reactors. As a result of this effort, it was developed the computer program PADPLAC-UMo, which perform thermal and mechanical analysis of uranium-molybdenum monolithic fuel plates taking into account the physical, chemical and irradiation effects which these fuels plates are subjected in operating conditions under steady state. The PADPLAC-UMo program was developed according to structured programming technique and using the FORTRAN 2003 programming language. The verification of the results provided by the program was performed by comparing the results provided by the code with data obtained from the literature, which proved to be extremely scarce. Due to this fact, the verification of the code was complemented by means of analytical calculations and data provided by computational simulations executed with the ANSYS finite element program. The verification of the results provided by the code showed that the models implemented provide results compatible with the data obtained through analytical calculations and computational simulations using the ANSYS program. (author)