TerraPower Isotopes to Build $450M Nuclear-Isotope Hub in South Philadelphia
Bill Gates–backed TerraPower Isotopes plans a $450 million, 250,000-square-foot facility at The Bellwether District in South Philadelphia to manufacture actinium-225 for cancer-treatment research, creating 225 full-time jobs and about 500 construction roles. Construction starts in spring 2026, with operations expected by 2029, aided by state grants and tax incentives; the company says safety measures and regulatory oversight ensure minimal health risk to residents.