LG-13-113, Request to Use a Provision of a Later Addenda of the ASME Boiler and Pressure Vessel Code, Section XI
| ML13270A197 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom, Byron, Braidwood, Limerick, Clinton, LaSalle, Crane  (DPR-044, DPR-050, DPR-056, NPF-011, NPF-018, NPF-037, NPF-039, NPF-062, NPF-066, NPF-072, NPF-077, NPF-085) |
| Issue date: | 09/25/2013 |
| From: | Jim Barstow Exelon Generation Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LG-13-113, RS-13-237, TMI-13-142 | |
| Download: ML13270A197 (5) | |
Text
LG-13-113 RS-13-237 TMI-13-142 10 CFR 50.55a September 25, 2013 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001
Subject:
Braidwood Station, Units 1 and 2 Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456 and STN 50-457 Byron Station, Units 1 and 2 Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454 and STN 50-455 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374 Limerick Generating Station, Units 1 and 2 Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352 and 50-353 Peach Bottom Atomic Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278 Three Mile Island Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-50 NRC Docket No. 50-289 Request to Use a Provision of a Later Addenda of the ASME Boiler and Pressure Vessel Code,Section XI
U.S. Nuclear Regulatory Commission Request to Use a Provision of a Later Addenda of the ASME B&PV Code,Section XI September 25, 2013 Page 2
Reference:
NRC Regulatory Issue Summary 2004-12, "Clarification on Use of Later Editions and Addenda to the ASME OM Code and Section XI," dated July 28, 2004 In accordance with 10 CFR 50.55a, "Codes and standards," paragraph (g)(4)(iv), and the guidance provided in the referenced document, Exelon Generation Company, LLC (Exelon) requests NRC approval to use a specific provision of a later edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (B&PV) Code,Section XI, for the units identified above. Specifically, Exelon requests approval to substitute the examination requirements of the 2001 Edition through 2003 Addenda, or 2004 Edition for Examination Categories B-L-1, B-M-1, and C-G for those specified in the 2007 Edition with the 2008 Addenda.
Exelon requests approval of this request by September 25, 2014. There are no regulatory commitments in this letter.
If you have any questions concerning this letter, please contact Tom Loomis at (610) 765-5510.
Respectfully, James Barstow Director Licensing and Regulatory Affairs Exelon Generation Company, LLC
Attachment:
Request to Use a Portion of a Later Edition of the ASME B&PV Code,Section XI cc:
Regional Administrator-NRC Region I Regional Administrator-NRC Region Ill NRC Senior Resident Inspector-Braidwood Station NRC Senior Resident Inspector-Byron Station NRC Senior Resident Inspector-Clinton Power Station NRC Senior Resident Inspector-LaSalle County Station NRC Senior Resident Inspector-Limerick Generating Station NRC Senior Resident Inspector-Peach Bottom Atomic Power Station NRC Senior Resident Inspector-Three Mile Island Nuclear Station, Unit 1 NRC Project Manager-Braidwood Station NRC Project Manager - Byron Station NRC Project Manager-Clinton Power Station NRC Project Manager-LaSalle County Station NRC Project Manager-Limerick Generating Station NRC Project Manager - Peach Bottom Atomic Power Station NRC Project Manager-Three Mile Island Nuclear Station, Unit 1
Attachment Request to Use a Portion of a Later Edition of the ASME B&PV Code,Section XI
Proposed Use of Subsequent ASME Code Edition and Addenda In Accordance with 10 CFR 50.55a(g)(4)(iv) 1 In accordance with 10 CFR 50.55a, 11COdes and standards, II paragraph (g)(4)(iv) and the guidance provided in Reference 1, Exelon Generation Company, LLC (Exelon) requests NRC approval to use specific provisions of a later addenda of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (B&PV) Code,Section XI, for Braidwood Station, Units 1 and 2, Byron Station, Units 1 and Clinton Power Station, LaSalle County Station, Units 1 and 2, Limerick Generating Station, Units 1 and 2, Peach Bottom Atomic Power Station, Units 2 and 3, and Three Mile Island Nuclear Station, Unit 1. Specifically, Exelon requests approval to substitute the examination requirements of the 2001 Edition through 2003 Addenda, or 2004 Edition for Examination Categories B-L-1, B-M-1, and C-G for those specified in the 2007 Edition with the 2008 Addenda.
- 1. ASME Code Component(s} Affected:
All components subject to examination under ASME Section XI Examination Categories B-L-1 and B-M-1 for Class 1, and C-G for Class 2.
2. Applicable Code Edition and Addenda
PLANT INTERVAL EDITION START END Braidwood Station, Third 2001 Edition through 2003 July 29, 2008 July 28, 2018 Units 1 and 2 Addenda October 17, 2008 October 16, 2018 Byron Station, Third 2001 Edition through 2003 January 16, 2006 July 15, 2016 Units 1 and 2 Addenda Clinton Power Station, Third 2004 Edition July 1, 2010 June 30, 2020 Unit 1 LaSalle County Stations, Third 2001 Edition through 2003 October 1, 2007 September 30, 2017 Units 1 and 2 Addenda Limerick Generating Third 2001 Edition through 2003 February 1, 2007 January 31, 2017 Station, Units 1 and 2 Addenda Peach Bottom Atomic 2001 Edition through 2003 Power Station, Fourth Addenda November 5, 2008 November 4, 2018 Units 2 and 3 Three Mile Island Nuclear Fourth 2004 Edition April 20, 2011 April 19, 2022 Station, Unit 1
- 3. Proposed Subsequent Code Edition and Addenda (or Portion):
Exelon proposes to utilize portions of the ASME Section XI, 2007 Edition with the 2008 Addenda in lieu of the current applicable station code editions and addenda. Beginning with the 2007 Edition with the 2008 Addenda, the examination categories for pump casing and valve body welds in both Class 1 and Class 2 were removed from ASME Section XI. The affected ASME Section XI Examination Categories were B-L-1 and B-M-1 for Class 1, and C-G for Class 2.
The volumetric examinations of associated pump and valve components required under Examination Categories B-G-1 and C-D are unaffected by this request.
Proposed Use of Subsequent ASME Code Edition and Addenda In Accordance with 10 CFR 50.55a(g)(4)(iv) 2 The surface examinations of associated pump and valve components required under Examination Categories 8-K and C-C are unaffected by this request.
The visual examinations of associated pump and valve components required under Examination Categories 8-G-1, 8-G-2, 8-L-2, and 8-M-2 are unaffected by this request.
- 4. Related Requirements:
10 CFR 50.55a(g)(4)(iv) states:
"Inservice examination of components and system pressure tests may meet the requirements set forth in subsequent editions and addenda that are incorporated by reference in paragraph (b) of this section, subject to the limitations and modifications listed in paragraph (h) of this section, and subject to Commission approval. Portions of editions or addenda may be used provided that all related requirements of the respective editions or addenda are met."
10 CFR 50.55a(b)(2) incorporates by reference Section XI, Division 1, of the ASME B&PV Code, 2007 Edition with the 2008 Addenda, as approved in Reference 2. There are no limitations or modifications in 10 CFR 50.55a(b)(2) related to Examination Categories 8-L-1, B-M-1, or C-G.
- 5. Duration of Proposed Request:
The duration of this request will continue for the remainder of each site's current lnservice Inspection interval listed in Section 2 of this request.
- 6.
References:
- 1. NRC Regulatory Issue Summary 2004-12, "Clarification on Use of Later Editions and Addenda to the ASME OM Code and Section XI," dated July 28, 2004
- 2. Federal Register, 76 FA 36232, dated June 21, 2011