Question: The Portsmouth Gaseous Diffusion Plant is located in a town that was originally called what?
Sentence (from "Portsmouth Gaseous Diffusion Plant"): The plant is in shutdown status and is in preparation for decontamination and decommissioning (D&D), with some facilities overseen by the United States Enrichment Corporation, a subsidiary of USEC Incorporated, a publicly traded corporation (NYSE: USU).
Relevant evidence: No