Lecture 5: Can Nuclear Compete Given Decarbonization?

Nuclear energy struggles to compete in modern electricity markets because its high capital cost and long construction timelines create financial burdens that are generally unsustainable without state-managed financing or aggressive carbon pricing. Under current market conditions, it cannot economically outperform natural gas or renewable sources without significant government intervention.

• Construction hurdles — building a nuclear plant is expensive, and long timelines inflate costs 2.5 to 3 times higher than if the plants could be built rapidly [01:26].
• Market dominance — natural gas remains the most popular power source in the U.S. because its initial build costs are significantly lower than nuclear alternatives [09:34].
• Financial support — projects in the U.S. often survive only through federal loan guarantees, government-backed debt, and by charging customers for plant costs before electricity generation begins [13:27].
• Base load viability — while nuclear is often labeled as a necessary "base load" power source, natural gas is technically capable of fulfilling this role if economic and carbon constraints permit [36:08].
• Optimization modeling — software tools used to predict ideal energy mixes show that nuclear only becomes a logical financial choice under extreme decarbonization mandates or very high carbon taxes [59:48].
• Regional variance — the optimal power mix changes depending on location, as areas without access to geothermal energy may require different solutions than those with high solar or wind availability [1:15:54].

How do grid operators determine which power plants to pay during varying demand levels? What prevents natural gas plants from operating as a permanent base load power source?