For how long did the experimental SNAP 10A fission reactor operate before planned shutdown?
Answer
45 minutes
The SNAP 10A system was specifically deployed in 1965 as an experimental proof-of-concept for a space-based fission reactor. Unlike the RTGs intended for decades of service, SNAP 10A was designed for a controlled, relatively short demonstration run to validate the feasibility of generating significant power via fission in orbit. Following its activation and successful generation of power for the planned duration, the system was deliberately shut down after running for exactly 45 minutes, fulfilling the objectives set for that initial test phase.
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