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Southern NuclearOperating Company, Inc.42 Inverness Center ParkwayBirmingham, AL 35242June 29, 2015Docket Nos.: 52-02552-026ND-15-115210 CFR 50.90U.S. Nuclear Regulatory CommissionDocument Control DeskWashington, DC 20555-0001Southern Nuclear Operating CompanyVogtle Electric Generating Plant Units 3 and 4Revision 2 to Request for License Amendment:Use of AWS D1.1-2000 Criteria for Structural Welds (LAR-15-009R2)Ladies and Gentlemen:Pursuant to 10 CFR 52.98(c) and in accordance with 10 CFR 50.90, Southern NuclearOperating Company (SNC) requested an amendment to the combined licenses (COLs) forVogtle Electric Generating Plant (VEGP) Units 3 and 4 (License Numbers NPF-91 and NPF-92,respectively) on May 26, 2015. The requested amendment proposes to depart from Tier 2* andassociated Tier 2 information in the Updated Final Safety Analysis Report (UFSAR) (whichincludes the plant-specific DCD Tier 2 information) to revise the application of American Instituteof Steel Construction (AISC) N690-1994, Specification for the Design, Fabrication, and Erectionof Steel Safety-Related Structures for Nuclear Facilities, to allow use of American WeldingSociety (AWS) D1.1-2000, Structural Welding Code - Steel, in lieu of the AWS D1.1-1992edition identified in AISC N690-1994. The original LAR was supplemented by letter on May 28,2015 (LAR-15-009S, SNC correspondence ND-15-0968), to revise the Tier 2* designations ofsome of the proposed changes to the UFSAR, and revised by letter on June 9, 2015 (LAR-15009R1, SNC correspondence ND-15-1036), to address Nuclear Regulatory Commission (NRC)Staff questions and comments.This second revision to the request for amendment (LAR-15-009R2) provides additionalinformation related to the discussions of the proposed changes to the UFSAR language asprovided in previous Enclosure 4 and additional revisions to the proposed changes to theUFSAR language as provided in previous Enclosure 5. These changes reflect the discussionsfrom public meetings held on June 11 and June 18, 2015.Enclosure 6 provides a complete replacement for the description, technical evaluation,regulatory evaluation (including the Significant Hazards Consideration Determination) andenvironmental considerations for the proposed changes (as most recently provided inEnclosure 4). Enclosure 7 provides a complete replacement for the markups depicting therequested changes to the VEGP Units 3 and 4 UFSAR (as most recently provided inEnclosure 5).
U.S. Nuclear Regulatory CommissionND-15-1152Page 2 of 4SNC also submitted a Preliminary Amendment Request on June 1, 2015, regarding use ofthese changes during construction prior to NRC action on the LAR.This LAR does not attempt to address a related partial joint penetration and fillet weldcombination weld issue identified by an NRC inspector. The combination welds are beingaddressed separately.This letter contains no regulatory commitments.SNC requests NRC staff approval of the license amendment by July 29, 2015, to supportinstallation of seismic Category I and seismic Category II structures. Delayed approval of thislicense amendment could result in a delay in additional welding on seismic Category I and IIstructures and subsequent dependent construction activities. SNC expects to implement thisproposed amendment within 30 days of approval of the requested changes.In accordance with 10 CFR 50.91, SNC is notifying the State of Georgia of this LAR revision bytransmitting a copy of this letter and enclosures to the designated State Official.Should you have any questions, please contact Mr. Jason Redd at (205) 992-6435.Mr. Wesley A. Sparkman states that: he is the Regulatory Affairs Licensing Manager, NuclearDevelopment, of Southern Nuclear Operating Company; he is authorized to execute this oath onbehalf of Southern Nuclear Operating Company; and to the best of his knowledge and belief,the facts set forth in this letter are true.Respectfully submitted,SOUTHERN NUCLEAR OPWAS/ERG/kmsSworn to and subscribed before me thisNotaryPublic:?- day ofcli0 ?L7 J , My commission expires: I (2, ((0!1,,,,,,.,,.o.'t.R T. · . - '2015'!II.,,."'"" .Jv '\ . f c. "'········ '" -· *'' .\ .; \-.J . 't"" ;'h- : 1:·· :0::. . :l :!: 0 , . 'ks 'i.::: ·\ ·· '%4\il'!'l'h · .:.I.:.: Y·.· · Cb l,.J . . l !'. '·········AL"' ., ""', l'.t,, ,. , ·.,,,,. ,, to.a.e ,-.
U. S. Nuclear Regulatory CommissionND-15-1152Page 3 of 4Enclosures:1) and 2) Provided with original submittal (completely replaced)3) Provided with Supplement 1 submittal (completely replaced)4) and 5) Provided with Revision 1 submittal (completely replaced)6) Vogtle Electric Generating Plant (VEGP) Units 3 and 4 – Revised Request forLicense Amendment Regarding Use of AWS D1.1-2000 Criteria for StructuralWelds (LAR-15-009R2)7) Vogtle Electric Generating Plant (VEGP) Units 3 and 4 - Revised ProposedChanges to Licensing Basis Documents (LAR-15-009R2)cc:Southern Nuclear Operating Company / Georgia Power CompanyMr. S. E. Kuczynski (w/o enclosures)Mr. J. A. MillerMr. D. G. Bost (w/o enclosures)Mr. M. D. MeierMr. M. D. Rauckhorst (w/o enclosures)Mr. J. T. Gasser (w/o enclosures)Mr. D. H. Jones (w/o enclosures)Ms. K. D. Fili (w/o enclosures)Mr. D. R. MadisonMr. T.W. YelvertonMr. B. H. WhitleyMr. C. R. PierceMr. D. L. FultonMr. M. J. YoxMr. J. C. HarrelsonMr. W. A. SparkmanMr. J. P. ReddDocument Services RTYPE: VND.LI.L00File AR.01.02.06Nuclear Regulatory CommissionMr. V. M. McCree (w/o enclosures)Mr. M. Delligatti (w/o enclosures)Mr. L. Burkhart (w/o enclosures)Mr. P. B. Kallan (w/o enclosures)Mr. C. PatelMs. D. L. McGovernMr. B. M. BavolMs. R. ReyesMs. M. A. SuttonMr. M. E. ErnstesMr. G. KhouriMr. L. M. CainMr. J. D. Fuller
U. S. Nuclear Regulatory CommissionND-15-1152Page 4 of 4Mr. C. B. AbbottMs. S. TempleMr. I. A. AnchondoState of GeorgiaMr. J. H. TurnerOglethorpe Power CorporationMr. M. W. PriceMs. K. T. HaynesMs. A. WhaleyMunicipal Electric Authority of GeorgiaMr. J. E. FullerMr. S. M. JacksonDalton UtilitiesMr. D. CopeCB&IMr. J. Simmons (w/o enclosures)Ms. K. Stoner (w/o enclosures)Mr. C. A. CastellWestinghouse Electric Company, LLCMr. R. Easterling (w/o enclosures)Mr. S. W. Gray (w/o enclosures)Mr. J. W. Crenshaw (w/o enclosures)Mr. C. D. Churchman (w/o enclosures)Mr. L. WoodcockMr. P. A. RussMr. G. F. CoutureMr. M. Y. ShaqqoOtherMr. J. E. Hesler, Bechtel Power CorporationMs. K. K. Patterson, Tetra Tech NUS, Inc.Dr. W. R. Jacobs, Jr., Ph.D., GDS Associates, Inc.Mr. S. Roetger, Georgia Public Service CommissionMs. S. W. Kernizan, Georgia Public Service CommissionMr. K. C. Greene, Troutman SandersMr. S. Blanton, Balch BinghamMr. R. Grumbir, APOGMr. J. R. Bouknight, South Carolina Electric & Gas CompanyMr. D. Kersey, South Carolina Electric & Gas CompanyMr. B. Kitchen, Duke EnergyMr. S. Franzone, Florida Power & Light
Southern Nuclear Operating CompanyVogtle Electric Generating Plant (VEGP) Units 3 and 4ND-15-1152Enclosure 6Revised Request for License Amendment RegardingUse of AWS D1.1-2000 Criteria for Structural Welds(LAR-15-009R2)(This Enclosure consists of 22 pages, including this cover page)
ND-15-1152Enclosure 6Use of AWS D1.1-2000 Criteria for Structural Welds (LAR-15-009R2)Table of Contents1. Summary Description2. Detailed Description3. Technical Evaluation4. Regulatory Evaluation4.1Applicable Regulatory Requirements/Criteria4.2Precedent4.3Significant Hazards Consideration Determination4.4Conclusions5. Environmental Considerations6. ReferencesPage 2 of 22
ND-15-1152Enclosure 6Use of AWS D1.1-2000 Criteria for Structural Welds (LAR-15-009R2)1. Summary DescriptionPursuant to 10 CFR 52.98(c) and in accordance with 10 CFR 50.90, Southern NuclearOperating Company (SNC), the licensee for Vogtle Electric Generating Plant (VEGP) Units 3and 4, requests an amendment to Combined License (COL) Numbers NPF-91 and NPF-92, forVEGP Units 3 and 4, respectively.This activity changes the design of welding for structures in the nuclear island and in the seismicCategory II portions of the turbine building and annex building. The design change incorporatescriteria of American Welding Society (AWS) D1.1-2000, Structural Welding Code - Steel, intothe design of structures designed to the requirements of American Institute of SteelConstruction (AISC) N690-1994, Specification for the Design, Fabrication, and Erection of SteelSafety-Related Structures for Nuclear Facilities, for use in lieu of the AWS D1.1-1992 versionidentified in AISC N690-1994. AWS D1.1-2000 is used to supplement the provisions in AISCN690-1994 for sizing criteria for welds joining steel tubular members, weld metal to use forASTM A992 steel, and the application of directionality in the evaluation of fillet welds.Supplemental provisions are added to the provisions in AWS D1.1-2000 for the application ofdirectionality for linear fillet weld groups concentrically loaded in-plane to the axis of the weldthat include elements oriented both longitudinally and transversely to the direction of appliedload to address deformation of the welds. The change also specifies extension of theapplication of directionality provisions to linear and concentrically loaded (i.e., loaded throughthe center of gravity of the weld group) rectangular and circular fillet weld groups loaded out-ofplane to the axis of the weld to supplement the conditions specified in AWS D1.1-2000.The use of AWS D1.1-2000 is necessary for future welding and for installed welding to resolvean item noted by a Nuclear Regulatory Commission (NRC) inspector. Note that this LAR(15-009) does not attempt to address a partial joint penetration (PJP) and fillet weld combinationweld issue also identified by an NRC inspector. The combination welds are being addressedseparately.Changes to Tier 2 and Tier 2* information in the licensing basis are included to allow the use ofthe AWS D1.1-2000 criteria and supplemental provisions.2. Detailed DescriptionThe requirements for the steel portion of the nuclear island structures are based on therequirements in AISC N690-1994. AISC N690 includes the use of AWS D1.1-1992 for weldingrequirements including the design and sizing of the welds. The requirements for the concreteportion of the nuclear island structures are based on American Concrete Institute (ACI) 349-01.ACI 349-01 includes the use of AWS D1.1-2000 for welding requirements.Page 3 of 22
ND-15-1152Enclosure 6Use of AWS D1.1-2000 Criteria for Structural Welds (LAR-15-009R2)The proposed change simplifies the application of requirements from different codes andstandards to the structural design through consistent use of the criteria for weld design inAWS D1.1-2000. The Updated Final Safety Analysis Report (UFSAR) cites AISC N690 andACI 349 as applicable codes for these structural designs. Reference to AWS D1.1-2000 isadded to these citations in the UFSAR as part of the proposed change for use in lieu of theAWS D1.1-1992 version identified in AISC N690-1994. AWS D1.1-2000 is added for use toreplace and supplement specific provisions in AISC N690-1994 related to welding as identifiedin the proposed changes to UFSAR Subsections 3.8.3.2 and 3.8.4.2.Reference to AWS D1.1-2000 is added where AISC N690 is identified as the applicable code forseismic Category I structures and components in UFSAR Subsections 3.6.2.3.4.2 (pipe whiprestraints), 3A.1 (heating, ventilation and air conditioning (HVAC) ducts and their supports), 3F.1(cable trays and their supports), and 3H.3.1 (auxiliary and shield buildings).The technical changes incorporated into AWS D1.1-2000 either add more restrictive provisionsor provide specific provisions for weld details not previously defined as follows: The sizing criteria for complete joint penetration groove welds for welding of tubularmembers in AWS D1.1-2000, Section 2.3.4.1 provide specific provisions for a weldconfiguration not included in AISC N690-1994. The provisions for groove welds forwelding of tubular members are cited to clearly identify the provisions for such connections.Provisions for welded connections for tubular steel members (hollow structural shapes) arespecifically excluded from AISC N690-1994.AWS D1.1-2000, Section 3.3 and Table 3.1 provide information not available in AISC N6901994, Section Q1.4.4 regarding the weld metal to use for ASTM A992 structural shapes.The need for the addition of weld metal for A992 steel is driven by industry changes instructural steel shape availability, as ASTM A992 has generally replaced ASTM A36 forstructural steel shapes.The criteria on the range of weld angles in AWS D1.1-2000, Figure 3.11 – Detail C, overwhich provisions for skewed T joints apply, are more restrictive than what was included inAWS D1.1-1992. These criteria do not replace or supplement specific provisions in AISCN690-1994 and therefore are not specifically included UFSAR text.The information on allowable stress for weld strength is included in AISC N690-1994 SectionQ1.5.3 and Table Q1.5.3. The technical changes included in the AWS D1.1-2000 edition alsoinclude criteria that consider load directionality on fillet welds and include an increase factor onstructural fillet weld strength. This provision in AWS D1.1-2000 provides a supplemental set ofprovisions that are not included in AISC N690-1994 and AWS D1.1-1992.The proposed change to the UFSAR also specifies that the use of the directionality provisionsapplies to rectangular and circular fillet weld groups concentrically loaded out-of-plane to theaxis of the weld. This is a supplementary change because AWS D1.1-2000 does notspecifically include application to these load configurations. The changes that permit the use ofPage 4 of 22
ND-15-1152Enclosure 6Use of AWS D1.1-2000 Criteria for Structural Welds (LAR-15-009R2)provisions in AWS D1.1-2000 for the application of directionality are supplemented withadditional provisions for linear weld groups that include elements oriented both longitudinallyan
Society (AWS) D1.1-2000, Structural Welding CodeSteel, in lieu of the AWS D1.1 - 1992 - edition identified in AISC N690-1994. The original LAR was supplemented by letter on May 28, 2015 (LAR-15-009S, SNC correspondence ND-15-0968), to revise the Tier 2* designations of
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