From a technical standpoint, I think Jesse is generally correct--a world with a high penetration of renewables is necessarily one with a lot of flexibility technology (energy storage, demand response, etc)--and these are precisely the technologies that would enable other sources, such as nuclear, to integrate and play along well. The devil, of course, would be in the technical details--how much energy storage needed, what capacity nuclear can play--but the general concept makes technical sense.
In an economic sense, maybe it's less clear. As is referenced in the article, marginal-price based wholesale market clearing means that high (zero-marginal cost) renewables penetration has economic limits. Even with a lot of flexibility technologies, does a high-renewables world (without subisidies) demand a different kind of wholesale energy market system? In a world of overwhelming flexibility, you'd get to a point where wholesale energy has a uniform price over time and location. But how short of "overwhelming flexibility" can you go before you need a different energy market to deal with high renewables penetration? More to the point, can you think of a such an energy market system that would let nuclear play economically too?