ML23107A181

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NRR E-mail Capture - Regulatory Audit Questions - Callaway LAR and Exemption for Fuel Transition to Framatome Gaia Fuel - EPIDs - L-2022-LLA-0150 and L-2022-LLE-0030
ML23107A181
Person / Time
Site: Callaway Ameren icon.png
Issue date: 04/17/2023
From: Mahesh Chawla
NRC/NRR/DORL/LPL4
To: Elwood T
AmerenUE
References
L-2022-LLA-0150, L-2022-LLE-0030
Download: ML23107A181 (3)


Text

From: Mahesh Chawla Sent: Monday, April 17, 2023 10:07 AM To: Elwood, Thomas B Cc: Jennifer Dixon-Herrity; Scott Krepel; Mathew Panicker; Ahsan Sallman; Santosh Bhatt; Jeremy Dean; Ravi Grover; Vic Cusumano; Andrea Keim; Gerry Stirewalt; Donald Palmrose

Subject:

Regulatory Audit Questions - Callaway LAR and Exemption for Fuel Transition to Framatome GAIA Fuel - EPIDs - L-2022-LLA-0150 and L-2022-LLE-0030

Dear Mr. Elwood,

By application dated October 12, 2022 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML22285A115), as supplemented by letter dated December 1, 2022 (ML22335A497), Union Electric Company, doing business as Ameren Missouri (the licensee), submitted a license amendment request (LAR) and an exemption request for Callaway Plant, Unit No. 1. The proposed amendment would revise the technical specifications to allow use of Framatome GAIA fuel with M5 as a fuel cladding material. Since the Framatome GAIA fuel will use M5 fuel rod cladding, a Title 10 of the Code of Federal Regulations (10 CFR)

Section 50.46, Acceptance criteria for emergency core cooling systems for light-water nuclear power reactors, and 10 CFR Part 50 Appendix K exemption request is included as part of this LAR.

On March 20, 2023, the U.S. Nuclear Regulatory Commission (NRC) staff issued a letter indicating their plans for a regulatory audit and setup of online reference portal request to the licensee. The audit plant included the request for documents and the audit questions from the NRC staff. The regulatory audit was conducted from April 4 through 6, 2023, during which licensee provided the pertinent information for the subject application. The NRC staff has developed following audit questions which they would like the licensee to provide additional information.

AUDIT QUESTIONS

1. ANP-3947P, Section 5.5.1.1, discusses the pressure drop associated with the GAIA fuel.

Discuss how the pressure drop is determined for the GAIA fuel assemblies under the various described configurations.

2. ANP-3947P, Section 5.5.3 lists the GAIA rod bow penalties for DNBR and LHGR.

Provide a short summary of the procedure used to calculate these penalties for the GAIA fuel.

3. ANP-10341PA, The ORFEO-GAIA and ORFEO-NMGRID Critical Heat Flux Correlations, includes several limitations and conditions in Section 4 of the associated Safety Evaluation. Discuss how the conditions and limitations are satisfied for the proposed Callaway application.

Please arrange a teleconference with the NRC staff to provide your response to this request.

Thanks Sincerely, Mahesh Chawla, Project Manager Plant Licensing Branch IV

Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission ph: 301-415-8371 Docket No. 50-483 OFFICE DORL/LPL4/PM DORL/LPL4/BC JDixon-NAME MChawla Herrity DATE 4/17/23 4/17/23

Hearing Identifier: NRR_DRMA Email Number: 2042 Mail Envelope Properties (SA1PR09MB8415343001983BD27B4C7BDBF19C9)

Subject:

Regulatory Audit Questions - Callaway LAR and Exemption for Fuel Transition to Framatome GAIA Fuel - EPIDs - L-2022-LLA-0150 and L-2022-LLE-0030 Sent Date: 4/17/2023 10:06:51 AM Received Date: 4/17/2023 10:06:52 AM From: Mahesh Chawla Created By: Mahesh.Chawla@nrc.gov Recipients:

"Jennifer Dixon-Herrity" <Jennifer.Dixon-Herrity@nrc.gov>

Tracking Status: None "Scott Krepel" <Scott.Krepel@nrc.gov>

Tracking Status: None "Mathew Panicker" <Mathew.Panicker@nrc.gov>

Tracking Status: None "Ahsan Sallman" <Ahsan.Sallman@nrc.gov>

Tracking Status: None "Santosh Bhatt" <Santosh.Bhatt@nrc.gov>

Tracking Status: None "Jeremy Dean" <Jeremy.Dean@nrc.gov>

Tracking Status: None "Ravi Grover" <Ravinder.Grover@nrc.gov>

Tracking Status: None "Vic Cusumano" <Victor.Cusumano@nrc.gov>

Tracking Status: None "Andrea Keim" <Andrea.Keim@nrc.gov>

Tracking Status: None "Gerry Stirewalt" <Gerry.Stirewalt@nrc.gov>

Tracking Status: None "Donald Palmrose" <Donald.Palmrose@nrc.gov>

Tracking Status: None "Elwood, Thomas B" <TElwood@ameren.com>

Tracking Status: None Post Office: SA1PR09MB8415.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2531 4/17/2023 10:06:52 AM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: