Curtailment
Energy a generator could have produced but was instructed not to, usually because the network cannot carry it.
Curtailment is output deliberately not taken. It happens when transmission between a generator and demand is congested, when supply exceeds demand at that moment, or when the system needs a different mix of resources for stability. The energy is not stored or deferred; it simply never exists.
It is the clearest evidence that generation and delivery are separate problems. Once a corridor is saturated, an additional project adds nameplate capacity and very little energy until transmission catches up - so a region can add gigawatts and see delivered clean energy barely move, which shows up as a falling capacity factor rather than as a headline.
For a buyer, curtailment is a contract risk rather than a statistic. A power purchase agreement written against a fleet that is regularly instructed down is a different instrument from the one on the term sheet, which is why it is tracked against the congestion that caused it rather than reported on its own.
Evidence that keeps pace with the decision.
Evaluate Nuclir against the systems, markets, and decisions that matter to your organization. The result is current intelligence with the context needed to use it responsibly.