[en] The objective of this task is to quantify the potential reduction in U₃O₈ requirements and to establish the technical feasibility of various alternatives which have been proposed for improving the U₃O₈ utilization of the PWR for use in the Non-Proliferation Alternation System Assessment Program (NASAP) and for input to the Internal Fuel Cycle Evaluation (INFCE). The improvement results reported are of a preliminary nature. Further work is necessary using more detailed methods, to further quantity the improvement, and to establish the practicality of actually implementing the improvements in pressurized reactors