SILVIA has been restructured and converted to ADA 95.FMV has from FOI ordered a validation of SILVIA against the old UNIX-version to accredit functionality and credibility of the new version. In the order both the simulation part and the MMI should be validated. This is the report from the validation of the simulation part. The order from FMV has been to simulate new scenarios to look at the functionality of the model. Comparison has been made with the scenarios made for the validation of SILVIA against the FOCUS exercise 1994. From the scenario tests has also been made. The simulations has shown that SILVIA seem to bee as correct as before. The two versions often gives the same outcome and respond equivalently. There are some differencies giving different outcome, but the differencies are often small. Often the old questionmarks means more for the outcome than model version. There are some new questionmarks but the old one makes more for the average outcome. The usefulnes of the SILVIA model is still intact, i.e. the ability to change the model before using it. That ability is also the reason for the difficulties using it, i.e. to know how parameters will affect the outcome.