Building big, conventional nuclear power plants is slow and expensive. That’s one reason the industry is staking its future on a new generation of smaller advanced reactors. Still in development, these offer the promise of carbon-free energy and could back up the ebbs and flows of renewable power in clean grids of the future. As Russia’s war in Ukraine galvanizes Western countries to break their reliance on Russian energy exports, in part by accelerating green technologies that will replace fossil fuels, one solution could be boosting the deployment of nuclear energy. Advanced nuclear startup Oklo Inc. says it could build a new plant in about one year. It wouldn’t be big, but it could be ready quickly if the US was willing to fast-track the regulatory process, said Oklo’s CEO Jacob DeWitte.