ML23125A160

NRR E-mail Capture - Correction to Beaver Valley - RAI Regarding Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations

ML23125A160
Person / Time
Site:	Beaver Valley
Issue date:	05/05/2023
From:	Sujata Goetz NRC/NRR/DORL/LPL1
To:	Lashley P Energy Harbor Nuclear Corp
References
L-2023-LLR-0021
Download: ML23125A160 (3)

Text

From: Sujata Goetz Sent: Friday, May 5, 2023 11:52 AM To: Lashley, Phil H

Subject:

Correction to Beaver Valley - RAI Regarding Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations (EPID L-2023-LLR-0021)

Attachments: BV RAI - Verbal.docx The EPID number was erroneously omitted when it was initially sent.

Dear Mr. Lashley,

By letter dated April 28, 2023, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23118A381), Energy Harbor Nuclear Corp. (the licensee) requested an alternative to the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code), Code Case N-638-10, Similar and Dissimilar Metal Welding Using Ambient Temperature Machine GTAW Temper Beat Technique. The licensee submitted a proposed alternative, 2-TYP-4-RV-06, for U.S. Nuclear Regulatory Commission (NRC) review and approval to support repair of two unacceptable flaw indications in the reactor vessel head (RVH) vent penetration tube material and associated weld at Beaver Valley Power Station, Unit No. 2 (BVPS2).

The Nuclear Regulatory Commission staff has reviewed your submittal and has determined that additional information, as stated in the attachment to this email, is needed to complete its review.

We discussed this RAI this morning and you indicated you understood our concerns. Once we receive your response on docket, we will schedule a meeting to issue verbal authorization.

Sincerely, Sujata Goetz Project Manager, Calvert Cliffs Nuclear Regulatory Commission 11555 Rockville Pike Office of the Nuclear Reactor Regulation NRC/NRR/DORL/LPL1 Office O8F2 Mailroom O8-B1A Rockville, MD 20852-2738 Washington, DC 20555-0001 (o) 301.415.8004 (f) 301.415.3313

Hearing Identifier: NRR_DRMA Email Number: 2081 Mail Envelope Properties (MN2PR09MB54670DEE3343195CB6EB9B6E80729)

Subject:

Correction to Beaver Valley - RAI Regarding Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations (EPID L-2023-LLR-0021)

Sent Date: 5/5/2023 11:51:38 AM Received Date: 5/5/2023 11:51:00 AM From: Sujata Goetz Created By: Sujata.Goetz@nrc.gov Recipients:

"Lashley, Phil H" <phlashley@energyharbor.com>

Tracking Status: None Post Office: MN2PR09MB5467.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 1494 5/5/2023 11:51:00 AM BV RAI - Verbal.docx 25568 Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION PROPOSED ALTERNATIVE 2-TYP-4-RV-06 ALTERNATIVE REPAIR METHODS FOR REACTOR VESSEL HEAD VENT PENETRATION TUBE AND ASSOCIATED WELD BEAVER VALLY POWER STATION, UNIT NO. 2 ENERGY HARBOR NUCLEAR CORP.

DOCKET NO. 50-412 By letter dated April 28, 2023, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML23118A381), Energy Harbor Nuclear Corp. (the licensee) requested an alternative to the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code), Code Case N-638-10, Similar and Dissimilar Metal Welding Using Ambient Temperature Machine GTAW Temper Beat Technique. The licensee submitted a proposed alternative, 2-TYP-4-RV-06, for U.S. Nuclear Regulatory Commission (NRC) review and approval to support repair of two unacceptable flaw indications in the reactor vessel head (RVH) vent penetration tube material and associated weld at Beaver Valley Power Station, Unit No. 2 (BVPS2). The licensees repair will be in accordance with IWA-4311 and ASME Code Case N-638-10, with two exceptions to N-638-10, to eliminate the 48-hour hold time for final examination and to allow use of progressive liquid penetrant tests in lieu of volumetric examination. The licensee requested this proposed alternative until the RVH is replaced.

Pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(z)(2), the licensee submitted the proposed alternative 2-TYP-4-RV-06 on the basis that complying with the specified requirement would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.

Request for Additional Information (RAI) - 1 In Section 5.0, Proposed Alternative and Basis for Use of the submittal the licensee states that, a seal weld will be made between the excavation and the remaining tube to prevent LP

[liquid dye penetrant] material from entering the gap between the tube and head materials. The NRC staff request details on the seal weld installation, including welding process, any filler materials used, and its effects on the subsequent temper bead process.