I would suggest modular, means they are an almost portable package. Something which can be delivered, set up, and generating within months, rather than decades.
That is indeed the idea. At present, each nuclear station is almost a one-off, with a lot of site-specific design - which means long lead times, and a partially new safety case for each one. Hence very long delivery times and expensive.
The idea with the SMR is that the basic design is standard, only a site-specific foundation layer needs to be designed, then a standard structure built on top of it. The reactor itself will be factory built and delivered by road - so that gives you an idea of the maximum size envelope.
The support & services can be built to suit multiple reactors, and the reactors can be slotted into place one at a time - so incrementally ramping up capacity.
Each unit would be sealed, and "just" lifted out and shipped back to the factory when needing a refuel.
The UK demand at the moment is 40 to 50Gw. So we would need maybe 100 of these SMR's, to meet the entire UK's present demand. Perhaps double that, in the future, with the move to increased demand. Hinkley is able to deliver around 7% of current demand.
Indeed, but that's not 100 sites, there would be multiple reactors on a site - otherwise the overheads would make it a non starter.
In any case, according to the well educated experts, we don't need all that much capacity because we've got all that wind and solar generation and that's getting more
More power to Starmers elbow on this, it's the first thing he has done, since he became PM, which I actually support.
Me too !
It's cheaper and safer to buy new than recycle uranium.
And that is a sad fact. Unfortunately, it also means we are creating a lot more "waste" than we need to - which also put the costs up.
Plutonium reactors are not a good idea.
We do in fact have the technology to use it (Fast Breeder Reactor) - safely ! But for political reasons (the only thing more toxic politically than the "N" word is the "P" word) it's not been allowed to happen. There is a story around that someone offered to build a reactor specifically to use up the "waste" currently in storage at Sellafield, but I've no idea how true that is. I have heard, from a source I'd take as knowing what he was talking about, that we actually have enough material in storage to supply our entire lecky needs for something like 100 years - if we actually used it.
If done sensibly, most of what is currently labelled waste would become fuel and the actual waste stream would be both less in quantity and less difficult to handle.
Sounds like a disaster waiting to happen with up to 100 "modular nuclear reactors dotted around the country -- sounds way too much of an opportunity to miss for a terrorist to attack. I guess they will have to have armed guards protecting them just like the big ones.
Agreed. But most of the security would be needed to avoid the PR problems rather than any real safety problems. The bit about "delivered by road" above might make people think a terrorist might drive into a site and drive off with a module. That won't happen: they wouldn't go on a normal sized lorry, you'd need to arrange the craneage, and then progress would be so slow (ever watched a really oversized load being moved

) it would be easy for the armed response to catch you.
Similar thing with the rail transport of flasks. "What is someone hijacks a train ?" - well they can only go where the rails take them, and they'd need a big crane to lift it (or even the lid) so SFA chance of doing anything dangerous before lots of armed response people have arrived.
Also, the designs are for the reactor units to be inherently or intrinsically safe - basically you could switch off or completely remove all support services and you would not have a meltdown (the module might not be usable afterwards, but it would not have any risk of releasing any radioactive material.)