A problem is that current [US] law prohibits more than two reactors from being operated from the same control room, making it illegal to site lots of the small modular reactors together. However, most of the experts believed that, if legal, installing a series of the small reactors could increase economies of scale and reduce costs. The main advantage to a small module reactor is the standardized factory production, which would certainly be cheaper than custom components.
China does not have the limitation on control rooms.
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