RS-22-035, Supplemental Information Regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs

Supplemental Information Regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs

ML22063B176
Person / Time
Site:	LaSalle
Issue date:	03/04/2022
From:	Kevin L Constellation Energy Generation
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-22-035
Download: ML22063B176 (4)

Text

4300 Winfield Road Warrenville, IL 60555 630 657 2000 Office RS-22-035 10 CFR 50.55a March 4, 2022 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 LaSalle County Station, Unit 1 Renewed Facility Operating License No. NPF-11 NRC Docket No. 50-373

Subject:

Supplemental Information regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs

References:

1. Letter from K. Lueshen (Constellation Energy Generation, LLC) to Nuclear Regulatory Commission (NRC), Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs, " dated March 2, 2022.

2. Letter from B. Vaidya (NRC) to J. Taken (Constellation Energy Generation, LLC), "LASALLE UNITS 1 AND 2 -REQUEST FOR ADDITIONAL INFORMATION (RAI) RE: Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs (EPID-L 2022-LLR-0028)," dated March 3, 2022.

3. Letter from K. Lueshen (Constellation Energy Generation, LLC) to Nuclear Regulatory Commission (NRC), Response to Request for Additional Information regarding Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs, dated March 3, 2022.

In Reference 1, Constellation Energy Generation, LLC (CEG), in accordance with 10 CFR 50.55a, "Codes and standards," paragraph (z)(2), Constellation Energy Generation, LLC (CEG) requested NRC approval of a relief request associated with the fourth Inservice Inspection (ISI) interval for LaSalle County Station (LSCS), Unit 1.

In Reference 2, the NRC requested additional information. A clarification call between the NRC and CEG was held on March 3, 2022 to ensure a common understanding of the information requested in Reference 2. Reference 3 includes CEGs response to the requested additional information.

March 3, 2022 U.S. Nuclear Regulatory Commission Page 2 The attachment to this letter contains supplemental information regarding the repair plans and type of welding being performed on the 1B33-F060A and 1B33-F060B anti-rotation segments.

CEG requests authorization of the proposed alternative and relief from radiography requirements by March 7, 2022.

There are no regulatory commitments contained within this letter. Should you have any questions concerning this letter, please contact Mr. Jason Taken at (630) 657-3660.

Respectfully, Lueshen, Digitally signed by Lueshen, Kevin Kevin Date: 2022.03.04 16:23:56

-06'00' Kevin Lueshen Sr. Manager - Licensing Constellation Energy Generation, LLC

Attachment:

Supplemental Information regarding Relief Request I4R-13 Associated with Alternative Examination Requirements for Repairs of Reactor Recirculation Flow Control Valves cc: NRC Regional Administrator, Region III NRC Senior Resident Inspector - LaSalle County Station NRC Project Manager, NRR - LaSalle County Station Illinois Emergency Management Agency - Division of Nuclear Safety

ATTACHMENT Supplemental Information regarding Relief Request I4R-13 Associated with Alternative Examination Requirements for Repair of Reactor Recirculation Flow Control Valves 1B33-F060A and 1B33-F060B

Supplemental Information regarding Relief Request I4R-13 Associated with Alternative Examination Requirements for Repair of Reactor Recirculation Flow Control Valves 1B33-F060A and 1B33-F060B ATTACHMENT By letter to the U.S. Nuclear Regulatory Commission (NRC) dated March 2, 2022, Constellation Energy Generation, LLC (the licensee) proposed an alternative to certain requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),

Section III and Section XI, related to the repair of degraded Reactor Recirculation Flow Control Valves at LaSalle County Station, Unit 1 (LaSalle Unit 1). The licensee submitted Relief Request No. I4R-13, for the proposed alternative Enhanced Visual testing (EVT) examination requirements in lieu of the required Penetrant Testing (PT) for the repairs.

Supplemental Information In Reference 1, CEG stated that it would be using Metal Inert Gas (MIG) welding on the anti-rotation segments of 1B33-F060A and 1B33-F060B. Due to efficiencies realized when using Tungsten Inert Gas (TIG) welding, CEG is supplementing Reference 1 to add the use of TIG welding in addition to MIG welding for the anti-rotation segments as described in Reference 1.

REFERENCES

1. Letter from K. Lueshen (Constellation Energy Generation, LLC) to Nuclear Regulatory Commission (NRC), Relief Request I4R-13 Relief from Code Examinations for 1B33-F060A and 1B33-F060B Repairs, " dated March 2, 2022.

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