... source in Kazakhstan, then for export. Electricity Infrastructures in the Global Marketplace4 4otherwise impossible with larger plants. As one module is finished and starts producing electricity, ... Magnox, using a different fuel cladding and her first reactor commenced operation in 1956, with commercial models operating from 1959. Electricity Infrastructures in the Global Marketplace5 2 The ... pressure in the primary cooling circuit, reaching 290°C. As in the PWR, the primary coolant generates steam in a secondary circuit to drive the turbines. The pressure tube design means that the...