Sir, - How to sell a dump? Sellafield. Sell a "rock laboratory". Sell a "repository". Full marks to the Nyrex spin doctors.
Might I suggest Selladump? It's neat, precise and to the point. It paints a clear, mushroom cloud, mental picture. Surely, for both scientist and advertiser, it is the concise appellation.
Speaking of appellations (controlled or otherwise) the French could use it as well. For how else would you now describe Muraroa? C'est la dump! - Yours, etc.
Manor Court, Knock na Carra. Galway.