NASA Lifts Ban On Radioactive Batteries Powered By Plutonium For Mission Proposals
http://www.techtimes.com/articles/223297/20180320/nasa-lifts-ban-on-radioactive-batteries-powered-by-plutonium-for-mission-proposals.htm
I started out in the industry in 1974 with Hittman Nuclear & Development Corporation (part of Hittman Associates) and we had a sister subsidiary called Hittman Nuclear Battery Corporation... and they made PU-238 batteries and experimented with Americium batteries, too. I was fascinated by the concept at the time and still find it really cool. Glad to see they are restarting this. It is a very good way to make the small amounts of energy required to keep a spacecraft moving.