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1 year agoChina Three Gorges Corporation announced that the 16-megawatt MySE 16-260 turbine had been successfully installed at the company’s offshore wind farm near Fujian Province on July 19. The behemoth is 152 meters (500 feet) tall, and each single blade is 123 meters (403 feet) and weighs 54 tons. This means that the sweep of the blades as they rotate covers an area of 50,000 square meters (nearly 540,000 square feet).
That’s just not true. The Westinghouse AP1000 was given type approval in 2011. It’s what is referred to as a GEN3+ reactor. A lot of R&D was put into simplifying the design, reducing the number of pipe runs, valves, pumps etc compared to GEN2 reactors. It also used large sub assemblies that were factory built off-site then moved for final assembly.
In theory they should have been cheaper to build, but they weren’t. Large assemblies that don’t fit together properly need a lot of very expensive site time for rework. There were other issues on top of that, which just compounded the assembly problems. It’s how Vogtle ended up going from $12B to $30B+, and V.C Summer went from $9B to an estimated $23B when the project was cancelled while under construction.
The EPR units from Areva were similar GEN3+and received type approval in the early 2000s. They had similar cost overruns, for similar reasons.
I have strong reservations about SMRs. So far the cost/MW is about on par with traditional reactors while the amount of waste increases by 2 to 30x traditional reactors depending on technology used.
There are reasons why reactors moved from 300-600MW units to 1000MW+ in the first place. The increased output would cover what was thought to be marginal increase in costs. That turned out to be at least somewhat true.