The World Nuclear Association says:
- There is revival of interest in small and simpler units for generating electricity from nuclear power, and for process heat.
- This interest in small nuclear power reactors is driven both by a desire to reduce capital costs and to provide power away from large grid systems.
- The technologies involved are very diverse.”
They have a list of small and medium reactors where development is well advanced:
|KLT-40S||35 MWe||PWR||OKBM, Russia|
|VK-300||300 MWe||PWR||Atomenergoproekt, Russia|
|CAREM||27 MWe||PWR||CNEA & INVAP, Argentina|
|NHR-200||200 MWt||PWR||INET, China|
|IRIS||100-335 MWe||PWR||Westinghouse-led, international|
|mPower||125 MWe||PWR||Babcock & Wilcox, USA|
|SMART||330 MWt||PWR||KAERI, South Korea|
|NuScale||45 MWe||PWR||NuScale Power, USA|
|MRX||30-100 MWe||PWR||JAERI, Japan|
|HTR-PM||2×250 MWt||HTR||INET & Huaneng, China|
|PBMR||200 MWt||HTR||Eskom, South Africa|
|GT-MHR||285 MWe||HTR||General Atomics (USA), Minatom (Russia)|
|BREST||300 MWe||LMR||RDIPE, Russia|
|SVBR-100||100 MWe||LMR||Rosatom/En+, Russia|
|FUJI||100 MWe||MSR||ITHMSO, Japan-Russia-USA|
It looks like the US isn’t exactly leading the charge.
Apparently a reactor with no moving parts is possible.