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The Valindaba site, also known as Pelindaba East or Y-plant, was an experimental uranium enrichment plant, located 35 km west of Pretoria, Gauteng province, South Africa. Valindaba is a Zulu word that means "about this we do not speak at all". The plant's name is consistent with the South African government's policy of official secrecy that concealed the plant's role in nuclear weapons production.