The accident with the Naquadria core is loosely based on the "Demon core" at the Los Alamos Laboratory which caused two deaths in 1945 and 1946 from accidents when the core went supercritical and emitted lethal doses of radiation.
Kelowna is actually a real city in the province of British Columbia, Canada. Most of Stargate SG-1 (1997) was filmed in and around British Columbia.
Major Carter attempted to use the handheld healing device from Kendra in the first season episode Thor's Hammer (1997).