Remote Maintenance of Molten Salt Reactors [video]
youtube.com
youtube.com
"critical in 1965 and was operated until 1969"
https://www.osti.gov/scitech/biblio/4780507-remote-maintenan...
Another related reference is Oak Ridge National Laboratory Review from Fall 1968, which includes the piece "MSRE into MSBR? The Hopes for ORNL's Molten Salt Reactor",† which includes descriptions of remote maintenance aspects.
https://www.ornl.gov/sites/default/files/ORNL%20Review%20v2n...
† Early Betteridge?
[0]: http://energyfromthorium.com/2016/10/16/ornl-msre-film/
[1]
"The Molten-Salt Reactor Experiment"
* Stephen Sinichak - Writer-Director
* C.K. Tipton - Assistant
* E.C. Sienknecht - Cameraman
* F.E. Frye - Assistant
* C.K. McGlothlan - Technical Advisor
"Remote Maintenance of Molten Salt Reactors"
* Stephen Sinichak - Writer-Director
* E. C. Sienknecht - Photographer
* Frank E. Frye - Assistant
That's likely enough archeology for today.