Just a quick note on the captioned topic. I am completely confident that SMR's are the future, though the range of power production will not always be limited to “small”, and the nuclear design will certainly not be limited to today's PWR (pressurized-water-reactor) technology. I wrote this note today in reply to the following comment:
It would not solve the waste problem which the IFR and LFTR probably would solve.
There isn't a “waste problem” because there is no technical issue with unburnt fuel, there is a political problem. If uranium wasn't so cheap the economics would have driven greater reprocessing.
It's important not to confuse the IFR or LFTR contributions with the concept of “mass manufacturing”. Remove the “S” and you have “MR” or Manufactured Reactor which is what is significant.
It isn't SMR-PWR vs. IFR/LFTR, it is volume manufacturing and the safety, quality and cost control that goes with the process-control that is important. When affordable, reliable power becomes a hot political issue – then I think that both fast reactors and thorium reactors will have their opportunities to compete. And both will be manufactured in quantity, where safety will be inherent in both the engineering and the process, not in ridiculously costly inspections.
So when you think of SMR don't think narrowly of current technology – which is constrained by what can be shoved through sclerotic regulators like NRC. Think instead a range of sizes of fast, high-temperature or thermal reactors.
It's also important to keep in mind that what the OECD countries do does not really matter that much w/r/t global warming. It is what the fast-developing countries like China, Brazil, Indonesia, Pakistan, or Uganda do. Those countries need cheap, reliable electricity that they can deploy without first creating a safety/technical culture and the associated infrastructure. One or two gigawatt mega-reactors are not appropriate and will not be adopted in those markets. At the right price 25 to 250 MW reactors that can be buried and refueled in 10 or 30 years – these just might be adopted by countries that don't give a damn about global warming. Let us hope…
We can also hope for a new politics where Bill Gates would have been able to build Terrapower in the USA instead of being forced to go to China. Frankly I think that will not happen – England's reforms would not have happened without the New World to generate the innovation. We don't know where the new models for US/EU will come from or what they will be like. But they might originate in Chile, Shanghai or Estonia.