Editing Nuclear meltdown (section)

===United States===
* The [[Westinghouse TR-2]] suffered partial core damage in 1960 when a likely [[Nuclear fuel#Common physical forms of nuclear fuel|fuel cladding]] defect caused one fuel element (out of over 200) to overheat and melt.<ref>{{Cite report |url=https://www.osti.gov/biblio/4828615 |title=SOME ASPECTS OF THE WTR AND SL-1 ACCIDENTS |last=Tardiff |first=A. N. |date=1962-04-01 |publisher=Division of Reactor Development, AEC |issue=IDO-19308 |osti=4828615 |language=English}}</ref>
* The reactor at [[EBR-I]] suffered a partial meltdown during a coolant flow test on 29 November 1955.
* The [[Sodium Reactor Experiment]] in [[Santa Susana Field Laboratory]] was an experimental nuclear reactor that operated from 1957 to 1964 and was the first commercial power plant in the world to experience a core meltdown in July 1959.
* The partial meltdown at the [[Fermi 1]] experimental fast breeder reactor, in 1966, required the reactor to be repaired, though it never achieved full operation afterward.
* The SNAP8DR reactor at the Santa Susana Field Laboratory experienced damage to approximately a third of its fuel in an accident in 1969.
* The [[Three Mile Island accident]], in 1979, referred to in the press as a "partial core melt",<ref>{{cite news| url=https://www.nytimes.com/2011/03/12/world/asia/12nuclear.html?scp=1&sq=%22three%20mile%22&st=cse | work=The New York Times | first=Matthew L. | last=Wald | title=Japan Expands Evacuation Around Nuclear Plant | date=11 March 2011}}</ref> led to the total dismantlement and the permanent shutdown of reactor 2. Unit 1 continued to operate until 2019.