Yucca Mountain, Nevada is designated as the proposed geological repository for disposal of spent nuclear fuel (SNF) and high-level radioactive waste (HLW). The U.S. Department of Energy (DOE) is preparing a license application to be submitted to the U.S. Regulatory Committee (USNRC). The Waste Package Closure System (WPCS) project, as summarized in this report, addresses control-related subsystems needed to perform waste package closure-related operations...