ML26014A120
| ML26014A120 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 01/13/2026 |
| From: | Mahesh Chawla NRC/NRR/DORL/LPL4 |
| To: | Elwood T Ameren Missouri, Union Electric Co |
| Chawla M | |
| References | |
| EPID L-2025-LLR-0095 | |
| Download: ML26014A120 (0) | |
Text
From:
Mahesh Chawla To:
Elwood, Thomas B Cc:
Morton, Jeremy W; Michael Mahoney; Angie Buford; Emma Haywood; Cory Parker; Ami Agrawal; Nathan Brown
Subject:
FW: LIC-109 Acceptance email - Callaway, Unit 1, 10 CFR 50.55a Request for Relief from Impractical Examination Coverage Requirements for The Fourth Ten-Year Inservice Inspection Program Interval - EPID: L-2025-LLR-0095 Date:
Tuesday, January 13, 2026 3:44:00 PM Dear Mr. Elwood
By letter dated December 10, 2025 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML25344A257), Union Electric Company (Ameren Missouri (the licensee) submitted a request for relief from impractical examination coverage requirements for the fourth ten-year inservice inspection program interval. Relief Request 14R-06 for the fourth lnservice Inspection (ISI) interval, which ended December 18, 2024.
Relief is being requested for certain weld examinations performed where the required coverage of "essentially 100%" could not be obtained, as clarified in 1WA-2200(c), when the subject welds were examined to the extent practical. Relief Request I4R-06 provides the bases for the determination that compliance with the 1WA-2200(c) is impractical.
The purpose of this e-mail is to provide the results of the U.S.Nuclear Regulatory Commission (NRC) staffs acceptance review of this relief request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant. Pursuant to Section10CFR 50.55 a(g)(5)(iii) of Title 10 of the Code of Federal Regulations (10 CFR), the applicant shall demonstrate that conformance with these ASME Section XI requirements is impractical since conformance would require extensive structural modifications to the component or surrounding structure.
The NRC staff has reviewed the licensees application and concluded that it does provide technical information in sufficient detail to enable the NRC staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the proposed change in terms of regulatory requirements and the protection of public health and safety and the environment. Given the lesser scope and depth of the acceptance review as compared to the detailed technical review, there may be instances in which issues that impact the NRC staffs ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. If additional information is needed, the licensee will be advised by separate correspondence.
This type of review typically requires a significant level of effort needed to complete an ISI impracticality review under 10 CFR 50.55a(g)(5)(iii) and to support the required staff findings under 10 CFR 50.55 a(g)(6)(i). Applying the NRC staffs Graded Estimate Method, the NRC staffs estimate for this review is 109 hours0.00126 days <br />0.0303 hours <br />1.802249e-4 weeks <br />4.14745e-5 months <br /> (which is a significant reduction from this type of review). The NRC staff expects to complete the review by June 30, 2026. If emergent complexities or challenges arise during the NRC staffs review that affect the initial forecasted completion date or result insignificant changes to the estimated review hours, the reasons for those changes along with updated estimates will be communicate during routine interactions with the assigned project manager. These estimates are based on the NRC staffs initial review of the application and may change due to several factors, including requests for additional information and unanticipated expansion of the review
scope. Additional delay may occur if the submittal is provided to the NRC in advance or in parallel with industry program initiatives or pilot applications.
If you have any questions, please contact me.
Mahesh(Mac) Chawla, Project Manager Licensing Branch LPL4 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Phone: (301) 415-8371 Email: Mahesh.Chawla@nrc.gov