However, those costs are mainly borne by the nuclear power plant developer and only impose limited additional costs on the electricity system as a whole. Section 2.3 will then analyse the special conditions that nuclear power plants impose on the electrical system at the level of the transmission. These include the higher requirements concerning grid stability and security, the specific requirements on grid layout due to the large size of a nuclear unit, as well as the interaction between the overall generation system and nuclear plants due to the latter’s operational characteristics.