ML100270297

TAC ME1821 Relief Request - Request for Additional Information (RAI)

ML100270297
Person / Time
Site:	Duane Arnold
Issue date:	01/26/2010
From:	Feintuch K Plant Licensing Branch III
To:	Byrne T NextEra Energy Duane Arnold
Feintuch K, NRR/DORL/LPL3-1, 415-3079
References
TAC ME1821
Download: ML100270297 (2)

Text

From: Feintuch, Karl Sent: Tuesday, January 26, 2010 10:35 AM To: 'Byrne, Thomas'

Subject:

ME1821 Relief Request - Request for Additional Information (RAI) Attachments: ME1821 CVIB (Purtscher) Draft RAI 2010-01-26 .doc The Nuclear Regulatory Commission (NRC) staff has reviewed your letter dated July 30, 2009, in which NextEra Energy Duane Arnold, LLC submitted a relief request for an alternative to the required 1 st period limited weld examinations for the 4 th ten-year interval of various welds at the Duane Arnold Energy Center (DAEC). The Vessels and Internals Integrity Branch (CVIB) is the reviewing technical branch for this request. The assigned reviewer is Patrick T. Purtscher.

Based on the review conducted thus far, the NRC staff has a request for additional information (RAI) as addressed in the enclosure.

The attached items are in draft form and, if clarification is needed, the NRC staff offers a conference call to discuss the items, confirm the content of the RAI items, and agree on a date of response, typically 30 days after receipt of this draft. You may propose another response schedule.

If there are no questions or need for clarification, the attached draft RAI becomes the final version. In this case, please contact me to confirm a response date for this RAI.

Please contact me, as needed, to discuss these RAI items.

Karl Feintuch Project Manager USNRC 301-415-3079 E-mail Properties Mail Envelope Properties (26E42474DB238C408C94990815A02F09059EB0A662)

Subject:

ME1821 Relief Request - Request for Additional Information (RAI)

Sent Date: 1/26/2010 10:34:39 AM Received Date: 1/26/2010 10:34:00 AM From: Feintuch, Karl

Created By: Karl.Feintuch@nrc.gov

Recipients:

Thomas.Byrne@nexteraenergy.com ('Byrne, Thomas')

Tracking Status: None

Post Office:

HQCLSTR01.nrc.gov Files Size Date & Time

MESSAGE 50125 1/26/2010 ME1821 CVIB (Purtscher) Draft RAI 2010-01-26 .doc 40746

Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False

Sensitivity: olNormal Recipients received:

DRAFT REQUEST FOR ADDITIONAL INFORMATION ON RELIEF REQUEST FOR 1 ST PERIOD LIMITED WELD EXAMINATIONS AT DUANE ARNOLD ENERGY CENTER (TAC NO. ME1821)

In a letter dated July 30, 2009, NextEra Energy Duane Arnold, LLC submitted a relief request for an alternative to the required 1 st period limited weld examinations for the 4 th ten-year interval of various welds at the Duane Arnold Energy Center (DAEC). The Vessels and Internals Integrity Branch (CVIB) is in the process of reviewing the request and based on the review conducted thus far, the staff has developed a request for additional information (RAI) as addressed below.

RAI-1 Table A from the Enclosure to the licensee's July 30, 2009 submittal lists a Category R-A exam for a R1.16 Item Number, and two welds, RMA-J004 and CUA-J024, with 50% coverage. Please identify clearly on the Isometric Drawings No. 1.2-20 and 1.2-22 which is the RMA-J004 weld that was inspected on Feb. 8, 2009 as well as the other seven manifold to riser welds that are considered comparable to RMA-J004. Have any of the eight manifold to riser welds been previously inspected as part of the ISI program?

RAI-2 The staff notes that many of the welds shown in the Isometric Drawings No. 1.2-20 and 1.2-22 have had weld overlays applied to repair cracking and/or leaks. Discuss the issues that will dictate which welds will be included in the 4 th interval Risk-Informed inspection plan. A list of the inspection history for other category R-A, Item R1.16 welds in the Reactor Coolant Recirculation (RCR) System would be helpful.