Off Peak
As long as we're talking about "stranded costs," why not consider the "unearned gains" accrued during construction? Namely (em the allowance for funds used during construction (AFUDC) representing capitalized financing costs that built up to such high levels back in the 1970s, during the peak of the last construction cycle for baseload electric generating plants.
One can argue the policy: Did those 70's-era rules on AFUDC extract unwarranted economic rents for nuclear construction? Good or bad, those costs are sunk.