The largest problem for SMRs (and there are many)...is
still economics.Just like their larger traditional brethren.
You see, large commercial-scale power plants have
large economies-of-scale advantages. SMRs only have an advantage in lower-risk profiles. and
maybe-faster-construction....
With a 2000MW commercial reactor:
- You have one centralized site to secure against intrusion. Nuclear security guards--are some of the highest paid "SECURITY" t-shirt wearers around.
- You have only 1-2 reactor cores, so you need only a handful of operators to run the thing. These people cost a LOT of money
- Being centralized with 1-2 cores you need fewer maintenance workers...these are also expensive because of the materials being worked with, and needed security clearances
- You have only one site to ship hazardous materials too.
As opposed to, let us hypothetically say a fleet of 100x SMRs each making 20MW....where you need far more of every single kind of manpower, you have far more sites, you need far more security personnel, you have far more of everything....the advantage of SMRs is only maybe in construction time and maybe in risk profile--but no one actually knows because no one has done it yet.
I've seen payrolls of nuclear plants--as expensive as they are to build...the wages are HIGH, and would make economic gains from "cheaper" SMR
construction all but wiped out.