Eskom Holdings, the State utility that supplies 95% of South Africa’s power, is overhauling the continent’s sole nuclear plant with the aim of extending its lifespan by at least 20 years. The revamp of the 1 860 MW Koeberg facility comes as Eskom struggles to produce enough electricity to meet demand and is grappling to address construction glitches and cost overruns at two new coal-fired power stations. The nuclear plant is one of the cheapest to operate in the utility’s fleet.