Once it’s built and operational? It can run near 100% for literally decades at 99.9% plus uptime, no solar source is going to do that because of physics where y

Once it’s built and operational? It can run near 100% for literally decades at 99.9% plus uptime, no solar source is going to do that because of physics where you can easily vary from 0% to 99% over a single day and have to smooth that out for the grid. Obviously you will need an extra reactor or 3 for when you have to take one of the others offline for maintenance.