After the first frequency drop, units serving areas from 1 to 5 will increase their output under signal from TSO, provided that the grid connections have enough transport capacity to bear additional load. For instance, the construction of a new large nuclear plant may require increasing spinning reserves, which would not be needed if several smaller units are built instead. Thus, spinning reserves are potentially a differentiating factor between large reactors and SMRs and could favour the choice of smaller reactors.