For more than 20 years, DOE focused on developing a deep geologic repository for the permanent disposal of SNF and HLW at Yucca Mountain in Nevada, and the Board provided technical and scientific findings, conclusions, and recommendations on the technical and scientific validity of DOE's efforts. DOE submitted a license application for a Yucca Mountain repository to the U.S. Nuclear Regulatory Commission (NRC) in June 2008. In early 2010, DOE petitioned the NRC for permission to withdraw the license application. In August 2013, the U.S. Court of Appeals for the DC Circuit ruled that NRC must resume its review of the Yucca Mountain license application. The Board continues to evaluate the validity of DOE activities related to implementing the NWPA and reports the results of its review to Congress and the Secretary of Energy.