 The Ventana Powerplant was based on the experimental nuclear reactor  that Rocketdyne operated at its Santa Susana Field Laboratory east  of Thousand Oaks, California, in Ventura County. The Rocketdyne  reactor also had numerous failures and accidents (due to its  experimental nature, not shoddy workmanship), and was finally shut  down, but to this day it remains in place as one of the first  nuclear reactors in California.