Introducing a Nuclear Power Plant (NPP) in an existing grid can be very challenging; even more so for developing countries like Bangladesh which have a rather small grid. For the safety and stability of the grid, emphasis needs to be put on the reinforcement of the existing power system. This paper attempts to find the reinforcement requirement for embedding the first NPP in a small grid. In this simulation based study, using Power Systems Analysis Framework (PSAF) software, several simulations have been conducted on a generic power system. The first simulation is conducted without any reinforcement of the system. The result of the simulation addresses the system instability of the generic grid when NPP is introduced. Then, by trial and error process, simulations have been conducted on the same system with different reinforcement combinations. Finally, one best reinforcement combination has been selected for which the grid is in stable operating mode. To make the simulation results reliable, the simulations were conducted using real time parameters, collected from Power Grid Company of Bangladesh (PGCB).