cape town greenpeace africa ngos intend appeal south africa decision grant environmental permit new 4,000 megawatt nuclear plant close cape town activists say monday last month south africa department environmental affairs grant authorization state-owned power utility eskom build new plant duynefontein close continent exist nuclear site koeberg south africa nuclear regulator say october installation site license plant would likely grant june despite finance minister say construction new plant unaffordable stagnant economy face credit downgrade project go ahead infringe environmental right present future generations authorization must challenge penny-jane cooke climate energy campaigner greenpeace africa say statement south africa nuclear plan shroud controversy uncertainty local activists media raise concern transparency cost well safety environmental risk time pretoria try reduce economy heavy reliance coal power nuclear reactor makers include rosatom south korea kepco france edf areva toshiba-owned westinghouse china cgn eye south african project could worth tens billions dollars activists appeal new south african nuclear plant decision