U-235

Broadcast 1392 (Special Edition)

Guest: Dr. Ralph McNutt: American spacecraft and plutonium power sources, Mercury, Messenger, Cassini. We welcomed Dr. Ralph McNutt of the Applied Physics Lab to the program. We started our first segment with a discussion of the use of Plutonium 238 as a power source for American spacecraft, asking the questions about why there appears to be so much resistance to anything nuclear in space by broad groups of concerned people. As you will hear, Dr. McNutt said that by using Plutonium 238, we were and are able to do things in space with various missions that we could not do otherwise. Dr.

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