Evaluation of the Moderator Temperature Coefficient of Reactivity in a PWRV. Memoli, and A. Cammi
Department of Nuclear Engineering, Politecnico di Milano, Milan, Italy
The moderator temperature coefficient (MTC) plays an important role within power thermal reactor dynamics. In order to run a reactor safely, a negative moderator coefficient temperature is necessary to reach stability during changes in temperature that can be caused by a step insertion of reactivity. Thus, MTC calculation is a key point in the reactor design process.
The aim of the present work is to implement a simple model for the MTC estimation in a Pressurized Water Reactor (PWR). The model is based on the well-known two-group diffusion theory, which allows critical calculations to be performed with good approximation.