> Add the cost of this kind of storage facilities to the cost of nuclear energy.
It's factored in, and especially on new projects such as Hinkley Point C it'd actually a pretty sizable chunk of the budget, and increases the price of the electricity produced even more because the timeline is quite short (the goal is to reimburse the construction costs within 20-25 years, meanwhile the power plant can operate for 50-70 years with some maintenance; that's what happens when you add a commercial profit incentive to such long term projects that simply shouldn't have one).
It's factored in, and especially on new projects such as Hinkley Point C it'd actually a pretty sizable chunk of the budget, and increases the price of the electricity produced even more because the timeline is quite short (the goal is to reimburse the construction costs within 20-25 years, meanwhile the power plant can operate for 50-70 years with some maintenance; that's what happens when you add a commercial profit incentive to such long term projects that simply shouldn't have one).