Kvalitetsarbete i samband med byggande av betongkonstruktioner
The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant. However some differences in model and reality has been detected and has to be remembered when using the model for further analysis.After validation the input data of the model was updated for analyzing the new power level that will soon be implemented. The model was then used for simulating some interesting transients. The simulations show that Ringhals 3 with increased power production will most likely be able to perform a transition from full load to house load or one turbine load without causing a reactor trip even if the dump capacity is limited. If the dump capacity is entirely cut off a reactor trip would be actuated. Simulations also show that with new control settings the reactor can be run lower in coast down than what is made today and still manage a house load transient without tripping.