# Long-Term Cooling and Unattended Water Makeup of Spent Fuel Pools
> **Nuclear Regulatory Commission** · Discontinuation of rulemaking activity; denial of petition for rulemaking. · Published 2025-05-07 · Effective 2025-05-07 · 90 FR 19247
## Document
- **Document number:** 2025-07899
- **Category:** nuclear-waste
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 90 FR 19247
- **CFR reference:** 10 CFR 50
- **Publication date:** 2025-05-07
- **Effective date:** 2025-05-07
- **Energy docket:** NRC-2011-0069
## Abstract

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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/05/07/2025-07899/long-term-cooling-and-unattended-water-makeup-of-spent-fuel-pools)
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