[T]he report’s executive summary certainly gets to the heart of their findings.
“The rhetoric from small modular reactor (SMR) advocates is loud and persistent: This time will be different because the cost overruns and schedule delays that have plagued large reactor construction projects will not be repeated with the new designs,” says the report. “But the few SMRs that have been built (or have been started) paint a different picture – one that looks startlingly similar to the past. Significant construction delays are still the norm and costs have continued to climb.”
I think this can be expanded out a bit, to the more generalizable case of matching generation to demand. Yes, storage can be a big part of that.
But another solution along the same lines may be demand shifting, which in many ways, relies on storage (charging car batteries, reheating water tanks or even molten salt only when supply is plentiful. And some of that might not be storage, per se, but creating the useful output of something that actually requires a lot of power: timing out industrial processes or data center computational tasks based on the availability of excess electrical power.
Similarly, improvements in transmission across wide geographical areas can better match supply to demand. The energy can still be used in real time, but a robust enough transmission network can get the power from the place that happens to have good generation conditions at that time to the place that actually wants to use that power.
There’s a lot of improvement to be made in simply better matching supply and demand. And improvements there might justify intentional overbuilding, where generators know that they’ll need to curtail generation during periods where there’s more supply than demand.
And with better transmission, then existing nuclear plants might be able to act as dispatchable backup power rather than the primary, and therefore serve a larger market.
It’s interesting watching how the 30minute electricy price has shifted patterns in the UK. 3-4 years ago there was no doubt that the cheapest time was 1am - 4am. These days the overnight dip isn’t anywhere near as significant as it was, and it’s now equally likely for 1pm-4pm to be the cheapest time of day.
All I can assume is that so many have moved usage to overnight due to “time of use” tariffs that now the demand curve has evened out a bit, and now the extra supply from solar during the day pushes the afternoon price down.