NL-18-021, Indian Point, Unit 2 - Submittal of Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability

Indian Point, Unit 2 - Submittal of Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability

ML18103A029
Person / Time
Site:	Indian Point
Issue date:	04/06/2018
From:	Vitale A J Entergy Nuclear Indian Point 2
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML18103A022	List: ML18103A030 NL-18-021, Indian Point, Unit 2 - Submittal of Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability NL-18-021, Submittal of Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability
References
NL-18-021
Download: ML18103A029 (2)

Text

A *-=--Entergy NL-18-021 April 06, 2018 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Indian Point Energy Center 450 Broadway, GSB P.O. Box249 Buchanan, NY 10511-0249 Tel (914) 254-6700 Anthony J. Vitale Site Vice President

SUBJECT:

Submittal of Fracture Mechanics Assessment of Embedded Flaw Repair

• Acceptability for Indian Point Unit 2 Indian Point Unit 2 Docket No. 50-247 License No. DPR-26

Reference:

1. Relief Request Number IP2-ISI-RR Proposed Alternative to Use Reactor Vessel Head Penetration Embedded Flaw Weld Repair Method, dated April 04, 2018.

Dear Sir or Madam:

On April 04, 2018, Pursuant to 1 O CFR 50.55a(z)(1

), Entergy Nuclear Operations, Inc. (Entergy) requested NRC approval of a relief request to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section XI, "Rules for lnservice Inspection of Nuclear Power Plant Components." Entergy proposed to repair the J-groove weld of the Reactor* Pressure Vessel Head Penetration

1. 3 using an embedded flaw repair process as an alternative to the defect removal and weld repair provision of ASME Section XI, IWA-4000 and ASME Section Ill, NB-4450. The use of the Westinghouse embedded flaw repair process for Penetration

1. 3 is consistent with repairs performed for numerous other plants with similar found indications in the J-groove weld. In Reference 1, Attachment 2, Entergy committed to submitting Westinghouse Letter L TR-SDA-18-035, Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability for Indian Point Unit 2, prior to entering Mode 5 during the present refueling outage, 2R23. Included in Attachment 1 of this letter is Westinghouse Letter L TR-SDA-18-035, .Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability for Indian Point Unit 2.

Docket No. 50-247 NL-18-021 Page 2 of 2 Entergy is making no commitments in this letter. Should you have any questions regarding this matter, please contact Mr. Robert Walpole, Manager, Regulatory Assurance, Indian Point Energy Center at (914) 254-6710.

Sincerely, AJV/trj Attachment 1 : Fracture Mechanics Assessment of Embedded Flaw Repair Acceptability for Indian Point Unit 2 cc: Mr. David Lew, Acting Regional Administrator, NRC Region I Mr. Richard Guzman, NRR Senior Project Manager Unit 2 NRC Resident Inspector's Office