America is heavily reliant on Russia for nuclear fuel. Congress might change that.

Nearly a year-and-a-half after Russia launched a brutal invasion of Ukraine, Congress appears poised to reduce America’s reliance on Moscow for uranium, the main fuel used by nuclear power plants.

Lawmakers took swift action to ban Russian oil and gas imports a month after the February 2022 invasion. But stemming the flow of Russian uranium imports has taken much longer, in part because Moscow provides more than 20 percent of U.S. nuclear fuel.

Yet before leaving town last month, the Senate took a key step toward bolstering domestic uranium supply chains and displacing the...