The institute was a joint project initiated by Dr. Howard Kelly a physician at Johns Hopkins University, and James S. Douglas, a mining executive and philanthropist, in cooperation with the US Bureau of Mines.
[1][2] The Institute's main radium plant in Denver was closed down in April 1917 and the NRI was officially dissolved as a corporation in Delaware in late 1919 and in Colorado on 20 January 1920.
NRI's plants and sites changed hands and uses several times in the following decades.
[3][4] In 1988, the institute's last two surviving buildings were demolished "due to extensive radiological contamination".
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