This paper presents the ℒ2 stability analysis of a networked pressure control system implemented in a nuclear power plant. The theoretical background for the applied modelling, identification, controller design tools and for the implementation process is also briefly discussed. To ensure the nominal stability properties of the designed controller in the networked environment the maximum allowable transmit interval (MATI) is computed based on the derived system model and the dynamic inversion based controller equations. This turns out to be sufficiently larger than the actual sampling interval. Simulations show good agreement with the theoretical computation results.