ML14161A351

Draft RAI for Relief Request 13-MN-003

ML14161A351
Person / Time
Site:	McGuire, Mcguire
Issue date:	06/10/2014
From:	Ed Miller Division of Operating Reactor Licensing
To:	Vu P T Duke Energy Corp
References
Download: ML14161A351 (3)

Text

1 NRR-PMDAPEm Resource From: Miller, Ed Sent: Tuesday, June 10, 2014 11:02 AM To: 'Vu, Phong T (Phong.Vu@duke-energy.com)'

Subject:

Draft RAI for Relief Request 13-MN-003 Attachments:Draft EPNB RAI.docx PT, The NRC staff's draft RAI for the subject relief request is atta ched to this e-mail. The draft RAI is not an official NRC staff request and is being provided to you to facilitate a subsequent conference call to determine: 1) If the questions clearly convey the NRC staff information needs; 2) Whether the regulatory basis for the questions is understood; 3) Whether the information is already available in existing, docketed, correspondence; and 4) To determine an appropriate response time-frame. After you've had a chance to review the draft information request, please contact me to schedule the conference call.

Ed Miller

(301) 415-2481

Hearing Identifier: NRR_PMDA Email Number: 1352 Mail Envelope Properties (9C2386A0C0BC584684916F7A0482B6CAFD0D8A321D)

Subject:

Draft RAI for Relief Request 13-MN-003 Sent Date: 6/10/2014 11:02:20 AM Received Date: 6/10/2014 11:02:00 AM From: Miller, Ed Created By: Ed.Miller@nrc.gov Recipients: "'Vu, Phong T (Phong.Vu@duke-energy.com)'" <Phong.Vu@duke-energy.com> Tracking Status: None

Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 669 6/10/2014 11:02:00 AM Draft EPNB RAI.docx 27397 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

DRAFT REQUEST FOR ADDITIONAL INFORMATION MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 THIRD 10-YEAR INSERVICE INSPECTION INTERVAL RELIEF REQUEST NO. 13-MN-003 DOCKET NOS. 50-369 AND 50-370

By letter dated February 6, 2014, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14055A402), Duke Energy Carolinas (Duke) submitted a request to the U.S. Nuclear Regulatory Commission (NRC) for relief from certain requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI for the third 10-year Inservice Inspection (ISI) Program for McGuire Nuclear Station, Unit 2 (McGuire 2). In order for the NRC staff to complete its review of the relief request, the following additional

information is requested.

1. What is the normal operating temperature and pressure for the subject welds (2ELDHX-HD-FLG & 2RCHPSS-OUT-1).

2. What environmental conditions are the subject welds, (2ELDHX-HD-FLG & 2RCHPSS-OUT-1), exposed to (e.g., system transients, vibration, flow)?

3. Describe the materials of construction for the stainless steel head, weld metal, and carbon steel flange in weld 2ELDHX-HD-FLG.

4. Describe the weld metal used in 2RCHPSS-OUT-1.

5. Has Duke performed a review of applicable operating experience for the subject welds? If so, did this review identify any industry operating experience of similar system welds developing service induced cracking or failure?