References 395% CONFIDENCEOverall confidence: 95%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]95%5 Facts to Know About Three Mile Islandenergy.gov· Published May 4, 2022· Starts Mar 28, 1979· 0% of score
The cited source explicitly dates this event; the pin records the stated calendar day.
- [2]95%Three Mile Island 2
Unit 2 historical pre-accident rating: 880 MWe net, 959 MWe gross. Permanently shut March 28, 1979; no ongoing generation. Calendar-1979 electricity supplied before closure: 1,318.10 GWh.[1]
- [3]95%Crane Clean Energy Centerconstellationenergy.com· Added Oct 24, 2026· 50% of score
Distinguishes the independent Unit 1 restart from damaged Unit 2.[1]
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