Company: EAI
Filing Date: 2025-10-31
Form Type: 10-Q
Source: 0000065984-25-000132
Chunk: 334

Company: ENTERGY ARKANSAS, LLC
Filing Date: 2025-10-31
Form: 10-Q
Item: Item 2
Chunk 334
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 placement of each plant in one of the NRC’s Reactor Oversight Process Action Matrix columns: “licensee response column,” or Column 1, “regulatory response column,” or Column 2, “degraded cornerstone column,” or Column 3, “multiple/repetitive degraded cornerstone column,” or Column 4, and “unacceptable performance,” or Column 5.  Plants in 

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Column 1 are subject to normal NRC inspection activities.  Plants in Column 2, Column 3, or Column 4 are subject to progressively increasing levels of inspection by the NRC with, in general, progressively increasing levels of associated costs.  Continued plant operation is not permitted for plants in Column 5.  All of the nuclear generating plants owned and operated by Entergy’s Utility business are currently in Column 1, except Waterford 3, which is in Column 2.

In June 2025 the NRC placed Waterford 3 in Column 2, effective second quarter 2025, based on the failure to properly develop and implement adequate maintenance instructions for the fuel linkage connection to the mechanical governor for an emergency diesel generator.  In September 2025, Waterford 3 successfully completed the supplemental inspection related to the issue.  Waterford 3 will return to Column 1, effective third quarter 2025, pending receipt of the NRC’s formal inspection report.

Environmental Regulation

The following are updates to the “Environmental Regulation” section of Part I, Item 1 of the Form 10-K.

In March 2025 the EPA announced a series of deregulatory actions, including reconsideration of the particulate matter National Ambient Air Quality Standards (NAAQS), reconsideration of the Mercury and Air Toxics Standard (MATS) rule, reconsideration of greenhouse gas emissions rules, evaluation of whether to extend the compliance deadlines under the 2024 coal combustion residuals rule, and reconsideration of the effluent limitations guidelines.  Entergy continues to monitor the EPA’s reconsideration efforts.

National Ambient Air Quality Standards

See the Form 10-K for discussion of the NAAQS set by the EPA in accordance with the Clean Air Act.  The following are updates to that discussion.

Hazardous Air Pollutants

As discussed in the Form 10-K, the EPA released the final MATS rule in December 2011, which had a compliance date, with a widely granted one-year extension, of April 2016.  The required