A couple side notes on TC article specifically for those interested:
1) NO reprocessing as somewhat indicated in article ("processing"). We use the low enriched used fuel from the reactor to make new fuel for the next deployment. We don't isolate dangerous parts as done in reprocessing which is the main concern with reprocessing.
2) True waste elimination- it's not just "less of a pain", which is definitely good: the reactor actually eliminates waste instead of just using it for fuel as some thermal types do (eg some startups seen in the media). Without fast neutrons, a reactor cannot burn the longest-lived parts of waste.
3) History on reactor regulatory process: Never before has a reactor been fully built and operated before licensing as somewhat indicated in final paragraph. That would cost $Bs. So, in all history of nuclear, they have built scaled models and spent hundreds of millions in scaled testing and modeling to prove that the scaled tests are accurate to what the full reactor will be like.
The UPower test reactor can be built to full scale for on the order of single digit $millions, which can be said with confidence because even a national lab built a similar reactor and produced electricity with tons of red tape for $100s k.
The heat transfer process has no moving parts and can be shown at full scale and tested to failure on the order of just $thousands, unlike the big boys with outrageously complicated flow loops, pumps, valves, secondary pumps, etc etc etc.
This means the UPower reactor has a chance at being the first commercial reactor able to use the streamlined "license by test" process.