How does the safety discussion around launching RTGs differ fundamentally from launching NTP systems?
Answer
RTGs use radioactive decay fuel designed to remain contained even in a launch explosion, whereas NTP launches an operational fission reactor core.
RTGs utilize Plutonium-238 designed to contain its mass upon failure, minimizing local hazard upon launch explosion; NTP involves launching a fission reactor, which is kept subcritical until safe distance, representing a different scale of risk profile.
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