10 CFR 50.21 - Class 104 licenses; for medical therapy and research and development facilities.

The U.S. Nuclear Regulatory Commission (NRC) is issuing a new regulatory guide (RG) 4.22, “Decommissioning Planning During Operations.” The guide describes a method that the NRC staff considers acceptable for use by holders of licenses in complying with the NRC's Decommissioning Planning Rule (DPR) (76 FR 35512; June 17, 2011). The DPR went into effect on December 17, 2012, and is intended to minimize the likelihood of new “legacy sites,” which are NRC-licensed facilities with insufficient resources to complete decommissioning activities and termination of a license at the end of operations.

The U.S. Nuclear Regulatory Commission (NRC) is requesting comment on the draft regulatory basis document to support the potential amendment of its regulations concerning nuclear power plant licensees' station blackout mitigation strategies. Appendix A of the draft regulatory basis provides a discussion of rule language concepts that the NRC staff is considering for this potential rulemaking. In addition, Appendix A contains a set of questions soliciting stakeholder feedback in areas that would support the NRC staff in developing a proposed rule. The issuance of this draft regulatory basis document is one of the actions stemming from the NRC's lessons-learned efforts associated with the March 2011 Fukushima Dai-ichi Nuclear Power Plant accident in Japan.