BSEP 11-0037, Reactor Pressure Vessel Shell-to-Flange Weld Analytical Evaluation

Reactor Pressure Vessel Shell-to-Flange Weld Analytical Evaluation

ML11110A022
Person / Time
Site:	Brunswick
Issue date:	04/13/2011
From:	Mentel P Progress Energy Co, Progress Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BSEP 11-0037
Download: ML11110A022 (4)

Text

jProgress Energy APR 1 3 2011 SERIAL: BSEP 11-0037 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Brunswick Steam Electric Plant, Unit No. 2 Renewed Facility Operating License No. DPR-62 Docket No. 50-324 Reactor Pressure Vessel Shell-to-Flange Weld Analytical Evaluation Ladies and Gentlemen:

In accordance with the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, IWB-3610(e), Carolina Power & Light Company (CP&L), now doing business as Progress Energy Carolinas, Inc., requests NRC review and approval of the analytical evaluation for an indication identified in the Brunswick Steam Electric Plant (BSEP), Unit No. 2 reactor pressure vessel (RPV) shell-to-flange weld.

The indication identified in the RPV shell-to-flange weld (i.e., an ASME Examination Category B-A component, as defined in Table IWB-2500- 1, Item No. B 1.30) did not meet the acceptance standards of IWB-3 510 and Table IWB-3 410-1, and was therefore evaluated in accordance with IWB-3132.3 and IWB-3600. Based on the results of the IWB-3600 analytical evaluation, a copy of which is enclosed, the RPV shell-to-flange weld has been accepted for continued service.

Unit 2 is currently in the fourth 10-year inservice inspection (ISI) interval. The applicable ISI code of record for the fourth 10-year ISI interval for Unit 2 is the 2001 Edition of the ASME Code,Section XI, with 2003 Addenda. For the ultrasonic examinations, the ASME Code,Section XI, Appendix VIII, "Performance Demonstration for Ultrasonic Examination Systems," of the 2001 Edition is implemented, as required and modified by 10 CFR 50.55a(b)(2)(xv).

Progress Energy Carolinas, Inc.

Brunswick Nuclear Plant p 4?

P.O. Box 10429 Southport, NC 28461

Document Control Desk BSEP 11-0037 / Page 2 No regulatory commitments are contained in this letter. Please refer any questions regarding this submittal to Mr. Lee Grzeck, Acting Supervisor - Licensing/Regulatory Programs, at (910) 457-2487.

Sincerely, Phyllis N. Mentel Manager - Support Services Brunswick Steam Electric Plant WRM/wrm

Enclosure:

Report No. 1100470.401, Rev. A, "Brunswick Steam Electric Plant Unit 2 Reactor Pressure Vessel Flaw Evaluation," Structural Integrity Associates, Inc.

Document Control Desk BSEP 11-0037 / Page 3 cc (with enclosure):

U. S. Nuclear Regulatory Commission, Region II ATTN: Mr. Victor M. McCree, Regional Administrator 245 Peachtree Center Ave, NE, Suite 1200 Atlanta, GA 30303-1257 U. S. Nuclear Regulatory Commission ATTN: Mr. Philip B. O'Bryan, NRC Senior Resident Inspector 8470 River Road Southport, NC 28461-8869 U. S. Nuclear Regulatory Commission (Electronic Copy Only)

ATTN: Mrs. Farideh E. Saba (Mail Stop OWFN 8G9A) 11555 Rockville Pike Rockville, MD 20852-2738 Chair - North Carolina Utilities Commission P.O. Box 29510 Raleigh, NC 27626-0510 Mr. Jack M. Given, Jr., Bureau Chief North Carolina Department of Labor Boiler Safety Bureau 1101 Mail Service Center Raleigh, NC 27699-1101

BSEP 11-0037 Enclosure Report No. 1100470.401, Rev. A, "Brunswick Steam Electric Plant Unit 2 Reactor Pressure Vessel Flaw Evaluation,"

Structural Integrity Associates, Inc.