ML101190047

Request for Additional Information, Request for Relief (RR) N2-I4-NDE-001 for the Fourth 10-Year Inservice Inspection Interval at NAPS2

ML101190047
Person / Time
Site:	North Anna
Issue date:	04/28/2010
From:	V Sreenivas Plant Licensing Branch II
To:	Heacock D Dominion, Virginia Electric & Power Co (VEPCO)
Sreenivas V.NRR/DORL/LPL2-1 415-2597
References
TAC ME3292
Download: ML101190047 (3)

Text

From: Sreenivas, V Sent: Wednesday, April 28, 2010 4:58 PM To: 'david.heacock@dom.com' Cc: 'david.sommers@dom.com'; 'Tom Shaub'; 'jay.leberstien@dom.com';

'page.kemp@dom.com'

Subject:

REQUEST FOR ADDITIONAL INFORMATION , Request for Relief (RR) N2-I4-NDE-001 for the Fourth 10-Year Inservice Inspection Interval at NAPS2 REQUEST FOR ADDITIONAL INFORMATION (RAI) FOR NORTH ANNA POWER STATIONS (NAPS)

(TAC NOS. ME3292)

By letter dated February 1, 2010 (Agencywide Documents Access & Management System (ADAMS)

Accession No. ML100330125), Virginia Electric and Power Company, (the licensee) requested a Request for Relief (RR) N2-I4-NDE-001 for the Fourth 10-Year Inservice Inspection Interval at North Anna Power Station, Unit 2 (NAPS 2). This relief request was submitted under Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(a)(3)(ii) due to the hardship of satisfying the relevant requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI for the specified ASME Code Class 1 and 2 components.

The ASME Code of record for the NAPS 2 Fourth 10-Year Interval ISI Program is the 1989 Edition of the ASME Code,Section XI with no Addenda.

The Vessels and Internals Integrity Branch (staff) has reviewed the information submitted by the licensee, and based on this review, determined the following information is required to complete the evaluation of RR N2-I4-NDE-001.

1. In the licensees submittal dated February 1, 2010, it was stated that: In conjunction with license renewal, Westinghouse has performed an evaluation to address the impact of operational transients for NAPS 2 to account for insurge/outsurge transients in addition to design transients in the pressurizer lower head.

Provide the Westinghouse Owners Group report number, title of report, and date of report regarding the evaluation noted in your submittal dated February 01, 2010.

2. In the licensees submittal dated February 1, 2010, the licensee noted that the surge line weld at the hot leg pipe connection will be included in augmented inspections. Are these inspections part of NAPS 2 commitment for Aging Management?

3. Will the licensee monitor the inspection results along with the results of planned research by the Electric Power Research Institute sponsored Materials Reliability Program used to address and asses Environmentally Assisted Fatigue for the surge nozzle?

4. Is the licensee aware of any industry operating experience involving degradation at the inside radius section of the surge line nozzle in a Westinghouse designed pressurizer?

Please submit the docketed response to these RAI's by May 29, 2010.

Docket Nos. 50-339 for NAPS Unit 2.

V. Sreenivas, PH.D., C.P.M.,

Project Manager, Rm.#O8F6, LPL2-1 North Anna Power Reactors, Units 1 and 2 Division of Operating Reactor Licensing-NRR (301) 415-2597, v.sreenivas@nrc.gov

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Subject:

REQUEST FOR ADDITIONAL INFORMATION , Request for Relief (RR)

N2-I4-NDE-001 for the Fourth 10-Year Inservice Inspection Interval at NAPS2 Sent Date: 4/28/2010 4:59:38 PM Received Date: 4/28/2010 4:59:00 PM From: Sreenivas, V Created By: V.Sreenivas@nrc.gov Recipients:

david.heacock@dom.com ('david.heacock@dom.com')

Tracking Status: None david.sommers@dom.com ('david.sommers@dom.com')

Tracking Status: None tom.shaub@dom.com ('Tom Shaub')

Tracking Status: None jay.leberstien@dom.com ('jay.leberstien@dom.com')

Tracking Status: None page.kemp@dom.com ('page.kemp@dom.com')

Tracking Status: None Post Office:

HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 16013 4/28/2010 Options

Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: