Experimental studies of helium release from aged PdT» show that the helium-to-metal-atom ratio saturates at a value of [He]/[Pd]=0. 5 under conditions of ambient-temperature storage. Below this value, very little helium release occurs. Thermal desorption experiments show that release from a sample with [He]/[Pd]=0. 3 requires temperatures in excess of -600 K, while release from a sample with [He]/[Pd] =0.02 requires temperatures in excess of at least 1300 K.These results are related to the question of the disposition of helium that would be produced by hypothetical fusion reactions in a Pdo"electrode.