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Energia e ambiente · 31/05/20171 min de leitura

Qualification of Safety-Related Vented Lead-Acid Storage Batteries for Nuclear Power Plants

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Resumo

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment draft regulatory guide (DG), DG-1338, "Qualification of Safety-Related Vented Lead-Acid Storage Batteries for Nuclear Power Plants." DG-1338 is proposed revision 1 of regulatory guide (RG) 1.158, "Qualification of Safety-Related Lead Storage Batteries for Nuclear Power Plants" dated February 1989. DG-1338 endorses (with clarifying regulatory positions) the Institute of Electrical and Electronics Engineers (IEEE) Standard (Std.) 535-2013, "IEEE Standard for Qualification of Class 1E Vented Lead Acid Storage Batteries for Nuclear Power Generating Stations." IEEE 535-2013 contains procedures for qualifying batteries with duty cycles of less than 8 hours and batteries with duty cycles longer than 8 hours.

Idioma original da fonte: Federal Register — Nuclear Regulatory CommissionAbrir o comunicado original →

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Energia e ambiente · 21/08/2026

Draft Regulatory Guide: Assessing Public Health Risk Associated With Chemical Hazards of Licensed Material

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment a draft Regulatory Guide (DG), DG-1444, proposed Regulatory Guide (RG) 1.264, "Assessing Public Health Risk Associated with Chemical Hazards of Licensed Material." This DG describes a methodology that is acceptable to the staff of the NRC to meet regulatory requirements assessing public health risk associated with chemical hazards of licensed material.

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Energia e ambiente · 24/08/2026

Arizona Public Service Company; Palo Verde Nuclear Generating Station, Units 1, 2, and 3; Indirect Transfer of Control of Licenses

The U.S. Nuclear Regulatory Commission (NRC, the Commission) is issuing an order approving the application dated April 24, 2026, filed by Arizona Public Service Company (APS), on behalf of Public Service Company of New Mexico (PNM), Troy ParentCo LLC (Troy ParentCo), and their corporate affiliates (together, Applicants). The application sought NRC consent to the indirect transfer of control of PNM's co- ownership of the Renewed Facility Operating License Nos. NPF-41, NPF- 51, and NPF-74 for the Palo Verde Nuclear Generating Station (Palo Verde), Units 1, 2, and 3, respectively, as well as the associated general license for the Palo Verde Independent Spent Fuel Storage Installation (ISFSI) (together, the facility). No physical changes or operational changes to the facility were proposed in the application.

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Energia e ambiente · 21/08/2026

Draft Interim Staff Guidance: Evaluations of Risk Assessments for Risk-Informed Decision-Making for Regulatory Applications

The U.S. Nuclear Regulatory Commission (NRC) is soliciting public comment on its draft Interim Staff Guidance (ISG), OAR/DARP-ISG- 2026-XX, "Evaluations of Risk Assessments for Risk-Informed Decision- Making for Regulatory Applications." If finalized, this ISG will provide guidance to the staff for reviewing systematic risk assessment methods, including probabilistic risk assessments (PRAs) and other systematic risk evaluations (SREs). This ISG will supplement existing guidance to facilitate the staff's understanding of the uses of risk information in regulatory applications and application of principles of risk-informed decision-making.

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Energia e ambiente · 10/09/2026

In Situ Recovery Monitoring and Decommissioning Timeliness

The U.S. Nuclear Regulatory Commission (NRC) proposes to amend its regulations that govern the licensing of uranium mills and the disposition of tailings and waste that arise from the extraction and milling of uranium by issuing risk-informed requirements for groundwater protection at uranium in situ recovery (ISR) facilities. The NRC's current regulations are focused on conventional uranium milling and do not expressly address uranium extraction by the ISR process. Additionally, NRC proposes to amend its regulations that govern decommissioning timeliness for all licensees to provide additional flexibility for licensees to delay the initiation of decommissioning activities in situations where safety would not be impacted.

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Energia e ambiente · 28/08/2026

Southern Nuclear Operating Company; Vogtle Electric Generating Plant Units 1 & 2; Independent Spent Fuel Storage Installation; Exemption

The U.S. Nuclear Regulatory Commission (NRC) has issued a one- time exemption to Southern Nuclear Operating Company (SNC), authorizing Vogtle Electric Generating Plant Units 1 and 2 (Vogtle 1 and 2) to retain a single Neutron Source Assembly (NSA) in its current storage cell within a multi-purpose canister ((MPC-32), serial number MPC-707) at the Vogtle Independent Spent Fuel Storage Installation, in a manner that is inconsistent with the loading restrictions specified in Certificate of Compliance (CoC) No. 1014, Amendment 11, for the HI- STORM 100S Version B dry storage system. The exemption allows the NSA to remain in a peripheral basket cell, contrary to Appendix B, Table 2.1-1, which restricts NSA containing assemblies to designated interior cells. The NRC's determination is based on SNC's safety evaluation and supporting analyses demonstrating that the configuration continues to meet applicable safety requirements for criticality control, shielding, thermal performance, structural integrity, and confinement.

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Energia e ambiente · 27/08/2026

NextEra Energy, Inc.; Dominion Energy, Inc.; Virginia Electric and Power Company; Dominion Energy Nuclear Connecticut; Dominion Energy South Carolina, Inc.; Surry Power Station, Unit Nos. 1 and 2; North Anna Power Station, Unit Nos. 1 and 2; Virgil C. Summer Nuclear Station, Unit 1; Millstone Power Station, Units 1, 2, & 3; North Anna Unit 3; North Anna Early Site Permit; and the Associated Independent Spent Fuel Storage Installations; Consideration of Approval of Transfer of Licenses

The U.S. Nuclear Regulatory Commission (NRC) received and is considering approval of an application filed by NextEra Energy, Inc. (NextEra Energy), Dominion Energy, Inc. (Dominion Energy), Virginia Electric and Power Company (VEPCO), Dominion Energy Nuclear Connecticut (DENC), and Dominion Energy South Carolina, Inc. (DESC) (collectively the Applicants) on July 15, 2026. The application seeks NRC approval of the indirect transfer of the facility operating licenses, materials licenses, and general licenses for Surry Power Station, Unit Nos. 1 and 2 (Surry); North Anna Power Station, Unit Nos. 1 and 2 (North Anna); Virgil C. Summer Nuclear Station, Unit 1 (V.C. Summer); and Millstone Power Station, Units 1, 2, & 3 (Millstone); as well as the combined license for North Anna Unit 3; and the North Anna Early Site Permit. The application contains sensitive unclassified non-safeguards information (SUNSI).

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