The molten salt reactor (MSR) is a concept whose feasibility was demonstrated in the 1960s with the Molten Salt Reactor Experiment (MSRE), which operated for five years at Oak Ridge National Laboratory (ORNL). Subsequently, research on this type of reactor slowed down due to a lack of investment, but recently interest in MSR has grown, with several startups around the world working on the development of this technology, which is recognised by the Generation IV International Forum (GIF). The aim of this work is to develop in Python a multiphysics code to perform point kinetic calculations and sensitivity analyses of relevant parameters of the Thorizon One reactor.