Long-Term Cooling and Unattended Water Makeup of Spent Fuel Pools

Document 2025-07899 is a Final Rule published by the Nuclear Regulatory Commission in the Federal Register on May 7, 2025, with an effective date of May 7, 2025. The U.S. Nuclear Regulatory Commission (NRC) is discontinuing a rulemaking activity, "Long-Term and Unattended Water Makeup of Spent Fuel Pools," and denying a petition for rulemaking. The petitioner requested that the NRC amend its regulations to require that nuclear power plant licensees ensure long-term cooling and unattended water makeup of spent fuel pools (SFPs). The purpose of this action is to inform members of the public that this rulemaking activity is being discontinued and to provide a brief discussion of the NRC's decision to discontinue the rulemaking and deny the aspects of the petition not previously addressed by the NRC. View the original at https://www.federalregister.gov/documents/2025/05/07/2025-07899/long-term-cooling-and-unattended-water-makeup-of-spent-fuel-pools.

No. Document 2025-07899 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.