Not today, maybe with a big breakthrough in storage tech but currently it is not scalable at the national or global level due to supply chain issues, take lithium as just one example. We will still rely on natural gas peakers to keep the power on for quite a bit of time to come. IMO small modular reactors with current technology would be a great solution to supplement renewables and move away from fossil fuels. That said there are a multitude of issues that would have to be worked out on the world scale which seems improbable. Dig a little deeper. The fossil fuel inevitably is here until we find an on demand alternative. Peak energy demand can not be powered by renewables alone. This is not a political stance but unfortunately it's the reality.