Transition from foster care: A state-by-state data base overview

Illustrative embodiments of the invention disclose fuel pellets for nuclear reactors in which the pellets have a controlled and relatively homogeneous porosity that accommodates fuel swelling and permits fission gases to escape from these pellets. Typically, small low density spheres, that may be formed from highly volatile material, are blended with a nuclear fuel powder, and are pressed and sintered into pellets of appropriately low density to produce an improved product.