The U.S. TerraPower boosts nuclear fuel efforts amid calls for import ban. News Letter Journal, Newcastle Wyoming, Newcastle Wyoming News, Newcastle News, Weston County Wyoming, Weston County Wyoming News, Weston County News, Newcastle, Weston County, TerraPower, Sen. John Barrasso, Sen. Cynthia Lummis, Rep. Liz Cheney, Republicans, Russia, Ukraine, U.S. Energy Information Administration, Kazakhstan, Uzbekistan, Soviet Socialist Republics, Senate Energy and Natural Resource Committee, Russian Federation, HALEU, Kemmerer, WyoFile, Wyoming News Exchange,