EQ6 Calculations for Chemical Degradation of PWR LEU and PWR MOX Spent Fuel Waste Packages

The Monitored Geologic Repository (MGR) Waste Package Operations of the Civilian Radioactive Waste Management System Management & Operating (CRWMS M&O) contractor performed calculations to provide input to the design of a waste package (WP). This document analyzes the degradation processes of two types of pressurized water reactor (PWR) spent nuclear fuel (SNF): • Fuel fabricated from low enriched uranium oxide, which has been used, or will ~ used, in commercial nuclear power plants. This SNF is referred to as LEU (low enriched uranium) SNF. • Fuel fabricated from plutonium oxide and uranium oxide, which may be used in commercial nuclear power plants in the future. This fuel has not yet been fabricated. It is referred to as MOX (mixed oxide) SNF.