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-2023-0158] AGENCY: Nuclear Regulatory Commission. ACTION: Exemption; issuance. SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) has issued an exemption in response to an exemption request from Union Electric Company doing business as Ameren Missouri (the licensee) submitted by letter dated October 12, 2022, as supplemented by letters dated December 1, 2022, May 9, 2023, June 21, 2023, and August 3, 2023. DATES: The exemption was issued on October 5, 2023. ADDRESSES: Please refer to Docket ID NRC-2023-0158 when contacting the NRC about the availability of information regarding this document. You may obtain publicly available information related to this document using any of the following methods: Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2023-0158. Address questions about Docket IDs in Regulations.gov to Stacy Schumann; telephone: 301-415-0624; email: Stacy.Schumann@nrc.gov . For technical questions, contact the individual listed in the For Further Information Contact section of this document. NRC's Agencywide Documents Access and Management System (ADAMS): You may obtain publicly available documents online in the ADAMS Public Documents collection at https://www.nrc.gov/​reading-rm/​adams.html . To begin the search, select “Begin Web-based ADAMS Search.” For problems with ADAMS, please contact the NRC's Public Document Room (PDR) reference staff a…