Keywords: Pu-Kugel.gif en A sphere made of 250 g plutonium-238 and about 3 cm in diameter It was used for a 100 Watt battery in a space mission 1970s http //www kernenergie-wissen de/plutonium html Los Alamos National Laboratory USA not sure PD-LosAlamos PD-USGov Plutonium Multi Hundred Watt Radioisotope thermoelectric generators |