ML24295A120

Relief Request ANO2-RR-24-001, Half-Nozzle Repair of Reactor Vessel Closure Head Penetration 71

ML24295A120
Person / Time
Site:	Arkansas Nuclear
Issue date:	10/21/2024
From:	Couture P Entergy Operations
To:	Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML24295A119	List: 2CAN102402, Enclosure 2: Framatome Affidavit ML24295A120 ML24295A123
References
2CAN102402
Download: ML24295A120 (1)

Text

NOTICE: Enclosure 1 to this letter contains Propr ietary Information to be withheld from public disclosure per 10 CFR 2.390. Upon separation from Enclosure 1, this letter is DECONTROLLED.

Phil Couture Senior Manager Fleet Regulatory Assurance - Licensing Tel 601-368-5102

2CAN102402 10 CFR 50. 55a

October 21, 2024

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Relief Request ANO2-RR-24-001, Half-Nozzle Repair of Reactor Vessel Closure Head Penetration #71

Arkansas Nuclear One, Unit 2 NRC Docket No. 50-368 Renewed Facility Operating License No. NPF-6

Reference:

NRC email to Entergy, "Arkansas Nuclear One, Unit 2 - Verbal Authorization of Relief Request ANO-RR-21-002 (EPID L-2021-LLR-0084)," ML21314A121, (2CAN112102), dated November 9, 2021

During the current Arkansas Nuclear One, Unit 2 (ANO-2) refueling outage 2R30, Entergy Operations, Inc., (Entergy) performed ultrasonic (UT) examinations of Reactor Vessel Closure Head (RVCH) penetration nozzles in accordance with American Society of Mechanical Engineers (ASME) Code Case N-729-6. During this inspection, an indication was detected on RVCH Control Element Drive Mechanism (CEDM) Nozzle #71. It was determined that the indication is not acceptable under ASME code requirements.

Due to the indication described above, repair of CEDM Nozzle #71 is required. Entergy has decided to perform a "half-nozzle" repair of CEDM Nozzle #71. The proposed alternative is provided in Enclosure 1 of this letter. Enclosure 1 contains information proprietary to Framatome Inc. (Framatome). Framatome requests that these documents be withheld from public disclosure in accordance with 10 CFR 2.390(a)(4). This information is marked with double bracketed ((( )) ) before and after the proprietary information. An affidavit supporting this request is contained in Enclosure 2. Enclosure 3 contains the non-proprietary version of the relief request.

This request is similar to the Reference request for the ANO-2 RVCH Penetration 46 that was approved by the NRC in 2021 (Referenced).

Pursuant to 10 CFR 50.55a(z)(1), Entergy requests NRC approval of the proposed alternative to the ASME Code repair/replacement requirements, on the basis that the proposed alternative provides an acceptable level of quality and safety.

Entergy Operations, Inc., 1340 Echelon Parkway, Jackson, MS 39213 2CAN102402 Page 2 of 2

This request for relief is required to address an emergent condition at ANO-2. Entergy requests NRC approval as soon as possible, but no later than October 22, 2024. Relief is requested for the duration of ANO-2 operating Cycle 31, currently expected to conclude in the Spring 2026.

Entergy understands that separate NRC approval will be required in order to extend the design life of the repaired nozzle beyond Cycle 31.

A new regulatory commitment is contained in the attachment to Enclosure 1.

If there are any questions or if additional information is needed, please contact Riley Keele, Manager, Regulatory Assurance, Arkansas Nuclear One, at 479-858-7826.

Respectfully, Digitally signed by Philip Couture Philip DN: cn=Philip Couture, c=US, o=Entergy, ou=Regulatory Assurance, Couture email=pcoutur@entergy.com Date: 2024.10.21 09:47:55 -05'00' Phil Couture

PC/rwc

Relief Request ANO2-RR-24-001, Revision 0 (Proprietary)

Attachment to Enclosure 1 Summary of New Regulatory Commitment

Framatome Affidavit

Relief Request ANO2-RR-24-001, Revision 0 (Non-Proprietary)

cc: NRC Region IV Regional Administrator

NRC Senior Resident Inspector - Arkansas Nuclear One

NRC Project Manager - Arkansas Nuclear One Enclosure 1, Attachment

2CAN102402

Summary of New Regulatory Commitments 2CAN102402 Enclosure 1, Attachment Page 1 of 1

SUMMARY

OF NEW REGULATORY COMMITMENT This table identifies actions discussed in this letter for which Entergy commits to perform. Any other actions discussed in this submittal ar e described for the NRCs information and are not commitments.

COMMITMENT TYPE SCHEDULED (Check one) COMPLETION DATE (If Required)

ONE-TIME CONTINUING ACTION COMPLIANCE

A one cycle justification will also be X Within 14 days of the developed and submitted to the NRC. end of the 2R30 refueling outage.