Union Electric Company, dba Ameren Missouri, Callaway Plant, Unit No. 1

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Nuclear Regulatory Commission [Docket No. 50-483; NRC-2022-0139] AGENCY: Nuclear Regulatory Commission. ACTION: Environmental assessment and finding of no significant impact; issuance. SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing an environmental assessment (EA) prepared under the National Environmental Policy Act of 1969 (NEPA) and NRC's regulations. This EA summarizes the results of the NRC staff's environmental review, which evaluates the potential environmental impacts of granting exemptions from NRC regulations and issuing an associated license amendment in response to a request from the Union Electric Company, doing business as (dba) Ameren Missouri (Ameren, the licensee) for Renewed Facility Operating License NPF-30, for the Callaway Plant, Unit No. 1 (Callaway). Specifically, the licensee is seeking a license amendment and regulatory exemptions that would, if granted, allow the licensee to use both a deterministic and risk-informed approach to address safety issues discussed in Generic Safety Issue (GSI)-191, “Assessment of Debris Accumulation in PWR [Pressurized Water Reactor] Sump Pump Performance” and to close Generic ( printed page 52817) Letter (GL) 2004-02, “Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors.” The NRC staff is issuing a final EA and finding of no significant impact (FONSI) associated with the proposed exemptions. DATES: The EA and …