A method of overall analysis for a compared evaluation of various nuclear fission and fourth generation units is here described. In this paper a series of questions related to the near-term deployment of new nuclear technologies in the  US and Worldwide  are answered  and validated by reproducing the mechanisms that drove the nuclear market to the actual configuration. It is then presented a simplified model of the form often used to project market competition ad hoc configured for the case of the energy production by nuclear power. The reproduced mechanisms of interest as well as the out coming model had been designed  following the SD approach since it was considered a most suitable and necessary tool for the research and evaluation of the typical feedback effects, which are characteristic of the destination market.
The most outstanding mechanism in terms of importance, uniqueness and significance was undoubtedly the “lock-in effect,” also referred to as long-term market domination. According to the lock-in phenomenon, even though a nuclear power plant is less attractive from a technical point of view it can take control of the market by being the first to be installed or by moving faster along its learning curve.