PIKETON, Ohio — The plans to build new nuclear facilities at the Portsmouth plant are dangerous ones, which would generate large amounts of radioactive chemicals and cause harm to local residents for years to come. For half a century, Portsmouth enriched uranium for nuclear weapons and nuclear reactors. The enrichment process generated harmful radioactive chemicals, some of which were released into local air, water, and soil, and ingested by humans. Recent state and national health data show high and rising rates of cancer and deaths in Pike County. Any plan that would subject already-suffering local residents to more harmful exposures to radioactivity should not be tolerated.