A high energy absorption top nozzle for a nuclear fuel assembly that employs an elongated upper tubular housing and an elongated lower tubular housing slidable within the upper tubular housing. The multiple downcomer assemblies are divisible into first and second cabinet compartments isolated from each other by a dividing wall. The improved process includes: adding extra water to the ordinary ingredients of chewy granola, allowing the water to soften the granola, extruding or shaping the softened granola, and drying or removing the water from the softened granola thereby restoring the granola to about its original texture and composition.