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ENCLOSURE 6

PROCEDURE 12751-MNGP-OPS-01, REVISION 0

SPENT FUEL CASK WELDING: 61 BT/BTH NU HOMS CANISTERS

29 pages follow Spent Fuel Cask Welding: 61BT/BTH NUHOMS Canisters

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Owner Approval: _____ I)ate: ~~~

Owner Approval: _____ I)ate: ~~~

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REVISION SUMMARY

Rev O Initial Draft Version: Drafted fran TrlVls Core document (NIIS 3 R7. Modified attachments 9.2 and 9.3 per NUH61BTH-4008, NUHOMS 61BTH TYPE 1 & 2 TRANSPORTABLE CANISTER FOR BWR FUEL FIELD WELDING.

Approved By Date ,

Reviewed By Date

c"' (.1>4/t 1 /2013>

Approved By Date 4\t\\ur~

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TABLE OF CONTENTS

SECTION PAQE 1.0 PURPOSE 4 2.0 APPLICABILITY 4 3.0 REFERENCES 4 4.0 REQUIREMENTS 4 s.o DEFINITIONS 4 6.0 RESPONSIBILITIES 4 6.1 Welding Supervisor Duties and Responsibilities 4 6.2 Job Supervisor Duties and Responsibilities 5 6.3 Welder Duties and Responsibilities 5 7.0 SPECIAL INSTRUCTIONS 5 8.0 PROCEDURE 6 8. t General GuldeUnes 6 8.2 GTAW Restriction 6 8.3 Preparation of Base Materials 6 8.4 Assembly 7 8.5 Preheat 8 8.6 Alignment 8 8.7 lnterpass 9 8.8 Rework of In-process Welds 9 8.9 Weld and HAZ Conditions Prior to NDE 9 8.10 Repair of Weld and HAZ Defects Post NDE 10 8. t 1 Base Metal Repairs 11 8.12 Records 11 9.0 A ITACHMENTS 12 9.1 Terms and Definitions 13-16 9.2 Weld Map 17-19 9.3 Weld Data Sheet 20-.25 9.4 Fit up / High-Low / Depth Record 26 9.5 Field Comment and/or Repair Log 27-29

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1.0 PURPOSE 1.1 Provides detailed instructions for making welds on the NUHOMS spent fuel cask canisters. 2.0 APPLICABILITY 2.1 This General Welding Standard encompasses welding perfonned by Tri Vis using the Welding Procedure Specifications that are issued for use with this procedure. 3.0 REFERENCES 3 .1. ASME Section III "Nuclear Power Plant Components" 1998 Edition with Addenda through 1999 3.2 QP-9.0, Welding Program 3.3 W AP-1, Control of Welding and Brazing Procedure Specifications 3.4 W AP-2, Control of Welder and Welding Operator Qualifications 3.5 WAP-3, Control of Filler Metal 3.6 Drawing Number: NUH61BTH-4008; NUHOMS 61BTH TYPE 1 & 2 TRANSPORTABLE CANISTER FOR BWR FIELD WELDING

4.0 REQUIREMENTS 4.1 All welding perfonned shall confonn to the applicable guidelines and/or restrictions set forth in this procedure, and the applicable code and project requirements. 4.2 No deviations from ~ential variables of the assigned Welding Procedure Specification (WPS) will be permitted without a revision to the WPS. Only the Welding Supervisor may change non-essential variables. These changes are to be noted on the assigned Weld Data Sheet (Attachment 9.3). 4.3 All Welding Procedure Specifications and Procedure Qualification Records shall be developed and controlled with W AP-1. 4.4 All Welders and Welding Operators shall be qualified and qualification maintained in accordance with W AP-2. 4.5 Welding filler metal shall be controlled in accordance with WAP-3, if applicable. Spooled wire may be left on the machine if said spool is secured to prevent removal or unauthorized welding. 5.0 DEFINITIONS 5.1 See Attachment 9.1 6.0 RESPONSIBILITIES 6.1 Welding Supervisor Duties and Responsibilities 6.1.1 Assuring there are qualified welding procedures for each material being welded. 6. I .2 Interpretation of the requirements imposed by this procedure. and applicable code and project requirements. 6.1.3 Providing instruction to the Job Supervisors and Welders as needed. Page4 of29 Spent Fuel Cask Welding -61BT/BTH NUHOMS Canisters 12751-MNGP-OPS-Ol, REV 0

6. J .4 Assuring that welding is being perfonned in accordance with this procedure. 6.1 .5 Assuring that all welders under his/her control are qualified for the welding they are performing. 6.1.6 Initiate and review weld maps and weld records. This may be delegated to Job Supervisors after appropriate training has been given. 6.1.7 Requisitioning appropriate welding materials for the welder's use in accordance with WAP-3, if applicable. 6.2 Job Supervisor Duties and Responsibilities 6.2.1 Identify any job data package that will require any welding for the Welding Supervisor's attention. 6.2.2 Assuring that all welders have been trained in the use of the applicable welding procedures. 6.2.3 Notifying the Welding Supervisor of conditions that are in violation or outside of this welding procedure. 6.2.4 Assuring that all welders under his/her control are perfonning acceptable welds. 6.2.5 Assure that all welders under his/her control have been trained to and work safely in accordance with TriVis Health & Safety Manual and/or Site Safety Policies. 6.3 Welder Duties and Responsibilities 6.3.1 Performing welding within the guidelines of this procedure and the assigned Welding Procedure Specification. 6.3.2 Infonning the Supervisor of any problems, deviations or malfunctions that develop. 6.3.3 Identifying all welds with his/her assigned Welder Identification Symbol using Attachment 9.3. 6.3.4 Assuring a fire is posted for all welding performed, as required. 7.0 SPECIAL INSTRUCTIONS 7.1 All welding shall be perfonned using Site Hot Work Pennits (Fire Watch). 7.2 All welding shall be perfonned using TriVis Health & Safety Manual and/or Site Safety Policies. 7.3 The metal canister serial number shall be identified on Attachment 9.3 and an orientation sketch shall be drawn to assure location of any repairs. As applicable, the sketch shall also show the location of segmented closure plate welds, etc. 7.4 All welders should have been given mockup training and shall be designated as approved for assignment to this work by the Welding Supervisor. 7.5 Setup and control shield gas purge flow by using the installed argon bottle flow regulator.

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8.0 PROCEDURE 8.1 General Guidelines 8. 1.1 All equipment used for welding shall be in proper working condition so that any qualified welder using it will be able to weld within the parameters of the WPS and obtain satisfactory results. 8.1.2 All vertical progression of welding shall be in accordance with the Welding Procedure Specification. 8.1.3 Should any equipment, filler metal or electrode produce abnormal results or exhibit an unusual appearance. its use should be stopped and the incident reported to the Job Supervisor. 8.1.4 All base shall be cleaned thoroughly in accordance with Section 8.3 ofthis procedure prior to welding. 8.1.5 If discontinuities are noted during the welding process, the welder shall stop and remove the discrepancy from the weld or heat affected zone. Prior to the addition of subsequent layers, the operator shall make necessary adjustments to the welding machine, within the WPS parameters, to correct the problem(s). 8.1.6 Weave width restrictions are to be measured from edge to edge using the guidance found on the WPS. 8.2 GfAW Restriction 8.2.l The GTAW process shall be used with the addition of filler metal only. No "wash" passes are allowed. 8.2.2 Due to the nature of the helium backfill process, a maximum of2.4% and up to I OOo/o helium backing gas may be present on the backside of the weld joint. 8.2.2. l Even though the intent is not to purge the backside of the weld joint, due to the nature of the cask, there may be air, hydrogen, helium or a combination on the back side of the joint. 8.3 Preparation of Base Materials 8.3. l All surfaces to be joined by welding shall be brought into the joint configuration shown on design drawings, weld data sheets, or specifications. The joint details shown on the WPS are for illustrative purposes only. 8.3.2 End preparations shall be prepared to bright metal and should be made by machining, grinding, sawing, shearing, etc ... 8.3.3 After acceptable end preparations have been made, the surfaces shall be protected from damage if they are not immediately welded. 8.3.4 All the weld joints shall be protected from non-radiological contamination and from rain, snow, and winds, prior to and during welding. Welding shall not be performed on wet surfaces.

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8.3.5 All surfaces to be joined by we)ding shall be cleaned prior to welding within a minimum of one inch on either side of the weld. Either a mechanical method or a solvent method or both shall remove paint, oil, rust, grease, scale or other harmful material. 8.3.6 Mechanical Cleaning Method A. Grinding, machining, filing, deburring, sanding, wire brushing, etc. shall be used to clean the joint surfaces of al) contaminants. All grinding whee)s shall be made of a resin or rubber-bonded alumina or silicon carbide compound. Wire brushes shall be made of Stainless . B. Caution shall be exercised not to reduce the wall thickness or joint configuration when mechanical cleaning is employed. C. Tools used for mechanical cleaning should be segregated. Tools used on stainless or high shall not have previously been used on carbon steels. D. Wire brushes, files, grinding wheels, flappers, deburring tools, etc. that are to be used on shall be marked when they are new. The marking shall be done prior to field use to preclude inadvertent use on carbon steels. E. IF stainless is worked inadvertently with tools suspected of contamination, the affected area shall be cleaned with an uncontaminated tool that is of the same type or of a more abrasive type. F. To the maximum extent passible, residue from mechanical cleaning shall be controlled such that particles fall away from and don't enter the component. Where mechanical cleaning cannot be performed in this manner, a vacuum hose or dirt catcher shall be employed; or plugs, caps or shields shall be placed so that particles cannot enter any component opening. Upon completion of such work, all debris and particles shall be removed from the work area. 8.3.7 Solvent Cleaning Method A. Solvent may be used with lint free cloths for the removal of grease, oil, paint or other contaminants that are found on the joint surfaces. B. All solvents shall be site issued, approved and controlled in accordance with Site Procedures. C. Solvents used on stainless steel shall meet the established criteria set forth within ASME Section V Article 6 par T -641 for contaminant content 8.3.8 AIJ welding consumables (bare electrodes, inserts, backing rings, etc.) shall be cleaned immediately prior to use. 8.4 Assembly CAUTION: DO NOT BEGIN SPARK PRODUCING WORK (INCLUDING TACK WELDS) PRIOR TO PERFORMING A CHECK FOR HYDROGEN GAS USING PLANT PROCEDURES A.ND EQUIPMENT. 8.4.1 Parts to be welded shall be brought into correct position by use ofjacks, clamps, fixtures, jigs, or other suitable means. 8.4.1. t Application of heat to achieve fit-up is strictly prohibited. Page7 of29 Spent Fuel Cask Welding-61BT/BTH NUHOMS Canisters 12751-MNGP-OPS-Ol, REV 0

8.4.2 The use of welded attachments to align or secure correct assembly is pennitted providing such devices are authorized by the Welding Supervisor for that particular weld and that they are the same material as the body being attached to. Lugs, strong backs, bridging bars, etc. are examples of these devices. Welding of attachments shall be controlled in accordance with the applicable WPS. 8.4.3 Any welded attachments shall be made of stainless steel. 8.4.4 Temporary attachments shall be removed flush to the original surface by machining, grinding or other suitable means. Caution sha11 be exercised not to encroach on the base material or reduce the required thickness. A. Prior to removal, the immediate area around the temporary attachment shall be marked in a suitable manner so that after removal the area can be identified until after it has been examined. B. After the temporary attachment has been removed, the marked area shall be examined in accordance with the governing code and approved procedures. 8.4.5 Use Attachment 9.4 to record total groove preparation depth, root layer, intermittent layer (if applicable) and final layer at flush. IF a negative reading (less than specified effective throat) is detennined, THEN notify the Project Manager for resolution prior to proceeding. Note: The metal canister will require careful assembly; attachments to this procedure, as well as, design drawings need to be consulted to assure that critical steps are followed. Example: If the reinforcement criterion is exceeded for Weld 1, the outer cover may not fit. 8.5 Preheat 8.5.1 Preheating of the base materials is not allowed unless the temperature is below 60 degrees F. If material is below 60 degrees F, then it shall be heated slowly and carefully by forced air heating without direct impingement of any flame on the surface. 8.5.2 Temperature readings shall be obtained by the use of a calibrated pyrometer and the temperature shall be recorded in Attachment 9.3 of this procedure. 8.6 Alignment 8.6.1 Assembled and properly prepared joints shall be aligned in accordance with design drawings or specifications. 8.6.2 When joints are aligned and no welding is perfonned immediately, the joint shalt be covered with a protective wrap that will prevent the entry of contaminants into the joint. 8.6.3 Fit-up shall be verified and signed off by the NDE inspector prior to any thermal operations. Sign off shall be recorded within Attachment 9.3. CAUTION: DO NOT BEGIN WELDING (INCLUDING TACK WELDS) PRIOR TO PERFORMING A CHECK FOR HYDROGEN GAS. 8.6.4 Tack Welds A. Only qualified welders shall perform tack welds. B. Only qualified welding procedures may be used to perfonn tack welds. Page 8 of29 Spent Fuel Cask Welding-61BT/BTH NUHOMS Canisters 12751-MNGP-OPS-Ol, REV 0

C. If tack welds are to be consumed within the finished weld, all stop, starts, uneven surfaces or if excessively proportionate to the joint design shall be ground and feathered to ensure proper incorporation. They shall be visually examined and free of defects. Defective tack welds shall be completely removed. D. When alignment devices are tack welded onto the base material, they shall be welded in accordance with an assigned WPS. E. All tack welds shall be inspected and signed off by the NDE inspector. Sign off sha1l be recorded within Attachment 9.3. 8.7 lnterpass NOTE: The purpose of laterpass restrictions is to control overheating the adjacent base metals. Overheating can cause sensitization in the heat affected zone of some stainless steels. This is particularly detrimental when welding 300 series stainless steel. 8. 7. 1 Maximum interpass temperature is listed on the WPS. The welder, just prior to placing a subsequent weld layer, shall check the interpass temperature. The temperature shall be checked within t" from the edge of the joint preparation or toe of the weld, with a calibrated pyrometer and the temperature shall be recorded in Attachment 9.3. 8.7. 1.1 If the temperature, when checked, is higher than specified, the welder shall stop and wait until the weld joint temperature cools below the temperature maximum before continuing welding. 8. 7.2 Interpass cleaning is essential to produce a quality weldment Grinding should be used only when needed. Wire brushing of the weld is mandatory to remove any surface contaminants. 8.8 Rework of In-process Welds 8.8. 1 Welders may rework any weld in order to achieve the required weld quality as long as the following conditions are met: A. The rework is prior to ND E. B. Removal of the discontinuity to visually acceptable standards and prepare the excavation for welding. C. The welder shall not remove the previously inspected weld layer. D. If excavation is in excess of previously inspected weld layer, the Welder shall stop work and NOE shall be perfonned on the excavation. 8.9 Weld and HAZ Conditions Prior to NDE 8.9.1 Prior to releasing the weld to Quality Control/NOE inspectors, all welds and HAZ shall be cleaned by hand wire brushing or other suitable means. Power wire brushing is not permitted when PT examination is to be performed. 8.9.1.l Other surface conditioning may be required in order to meet the requirement for nondestructive examination or project requirements. Finished welds and HAZ surfaces shall be clean of oil, dirt, grease, or other contaminants. A light heat temper film is acceptable. Page9of29 Spent Fuel Cask Welding ·61BT/BTH NUHOMS Canisters 127Sl-MNGP-OPS-01, REV 0

8.9.2 The completed weld and HAZ surfaces shall be free of the following: • coarse rippl~ • arc strikes • coarse grooves • overlap • abrupt ridg~ and valleys • cracks • porosity or fish-eyes • lack of fusion • lack of penetration • undercut(wash, scatloping or other nonstandard tenns) in excess of 1/32" • root concavity that results in less than minimum wall. 8.9.3 Surface conditioning to meet the above criteria shall be by grinding, filing, sanding, etc. Care shall be exercised to prevent any reduction in thickness of the base material or the reduction of the weld thickness beyond effective throat size. 8.9.4 Each welder shall identify his or her work by recording their assigned identification number in Attachment 9.3. 8.10 Repair of Weld Metal and HAZ Defects Post NDE 8.10.1 There are two types of weld repairs, Minor and Major. Minor weld repairs require only surface conditioning of the weld area and need no additional welding. Major weld repairs require the removal of defects and the addition of new weld metal. 8.10.2 Minor weld repairs to surface discontinuities (such as surface porosity, arc strikes, surface inclusions, improper profile, slight undercut, etc.) shall be repaired by grinding or machining to remove the defects. No addition of weld metal is allowed. A. After elimination, the area shatl be blended uniformly into the surrounding surface. The remaining thickness shall not be less than the minimum required. B. The repaired area shall be reexamined by NOE methods (VT and PT) to ensure that the defect has been completely removed or reduced to an acceptable limil C. Documentation of this type of repair shall be by notation on the original weld data sheet, Attachment 9.3.

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8.10.3 Major weld repairs are those that require removal of defects from the weld or the Heat Affected Zone (HAZ) and the addition of new weld metal. Examples of defects requiring a major weld repair may include lack of fusion, cracks, bum through, inclusions, crater cracks, excessive root concavity, excessive undercut, excessive root reinforcement, unconsumed insert, lack of penetration, etc. A. Major weld defects shall either be repaired as described below, or the entire weld removed and replaced, at the discretion of the Welding Supervisor. For repairs, the Welding Supervisor or his designee, shall provide and document the necessary direction, supervision and inspection requirements using Attachment 9.5. B. The defects shall be removed by grinding or any other suitable method as directed by the Welding Supervisor. C. The contour of the repair cavity may vary significantly from the original joint. It may be through wa11 or leave backing. The dimensions of the cavity shall be such that will allow adequate access for manipulation of the required welding process. D. Prior to rewelding, the cavity shall be examined by NOE methods (VT and PT) to ensure base metal and any remaining weld material (if applicable) are free of defects. Detailed photograph or dimensioned sketch of the cavity shall be attached to the Weld Data Sheet. E. The original Welding Procedure Specification (WPS), or another suitable WPS as directed by the Welding Engineer, shall be used to weld the repair cavity, recognizing that the cavity to be repaired may differ in contour and dimensions from the original joint or the WPS illustrations. F. After repair, the surface shat) be blended uniformly into the surrounding surface. G. Perform NDE methods (VT and PT) to repaired weld to ensure there are no defects. Detailed photograph or dimensioned sketch of the weld shall be attached to the Weld Data Sheet. 8.11 Base Metal Repairs 8.11 .1 The repair of base 1netal defects shall not be addressed within this procedure. 8.11 .2 At any time that a base metal defect is noted, all activities shall STOP and Supervision shall be notified in order to obtain engineering disposition and a repair plan is approved. 8.12 Records 8.12. J Records shall be maintained in a job work package created for each individual DSC. This is to record the applicable data and provide traceability for each weld as required by the governing code and project requirements using the Attachment 9.2 through Attachment 9.5. A. The Welding Supervisor, or designee, is responsible for the preparation and initiation of the required welding documentation. B. The Weld Data Sheet (Attachment 9.3) shall be used to document welds. 8.12.2 Applicable supporting records (such as Weld Materials Requisitions, NDE reports, etc.) shall accompany the Weld Data Sheet.

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9.0 ATTACHMENTS 9.1 Tenns and Definitions 9.2 Weld Map 9.3 Weld Data Sheet 9.4 Fit up/ High-Low I Depth Record 9.5 Field Comment and/or Repair Log

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ATTACHMENT 9.1

TERMS ANO DEFINITIONS (Taken from AWS A3.0 • 1980) J. AIR CARBON ARC CUTTING (AAC) - An arc cutting process in which metals to be cut are melted by the heat of a carbon arc and the molten metal is removed by a blast of air. 2. BACK GOUGING - The removal of weld metal and base metal from the other wise of a partiaJly welded joint to assure complete penetration upon subsequent welding from that side. 3. BACKING - A material (base metal, weld metal, carbon, or granular material) placed at the root of a weld joint for the purpose of supporting molten weld metal. 4. BACKING - See preferred tenn backing weld. 5. BACKING FILLER METAL - See consumable insert. 6. BACKING PASS - A pass made to deposit a backing weld. 7. BACKING - Backing in the form of a ring, generally used in the welding of piping. 8. BACK.ING STRAP - See preferred term backing strip. 9. BACKING STRIP-Backing in the form of a strip of compatible metal thick enough to retain the weld puddle. l 0. BACKING WELD - A weld deposited at the back of a single groove weld. 11. BASE METAL - (Material) - The metal (material) to be welded, brazed, soldered or cut. 12. BEVEL - An angular type of edge preparation. 13. BEVEL ANGLE - The angle formed between the prepared edge of a member and a plane perpendicular to the surface of the member. 14. BUIT JOINT-A joint between two members aligned approximately in the same plane. l 5. CLOSURE PLUGS- these are the circular caps that cover the vent and siphon holes in the cask. 16. COMPLETE FUSION - Fusion which has occurred over the entire base material surfaces intended for welding, and between all layers and passes. 17. COMPLETE JOINT PENETRATION -Joint penetration in which the weld metal completely fills the groove and is fused to the base metal throughout its total thickness. 18. CONTINUOUS WELD - A weld which extends continuously from one end of a joint to the other. Where the joint is essentially circular, it extends completely around the joint. 19. CONSUMABLE INSERT - Pre-placed filler metal which is completely fused into the root of the joint and become part of the weld. 20. CORNER JOINT - A joint between two members located approximately at right angles to each. 21 . CUTTING PROCESS - A process which brings about the severing or removal of metals. See arc cutting and oxygen cutting. 22. DEFECT -A discontinuity or discontinuities which by nature or accumulated effect (for example, total crack length) render a part or product unable to meet minimum applicable acceptance standards or specifications. This tenn designates rejectability. See discontinuity and flaw. 23. DEPOSITED MET AL - Filler metal that has been added during a welding operation.

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24. DISCONTINUITY - An interruption of the typical slructure of a weldment, such as Jack of homogeneity in the mechanical, melallurgicaJ, or physical characteristics of the material or weldment. A discontinuity is not necessarily a defect. See defect above. 25. DSC- Dry Shielded Canister. A vessel constructed to hold various types of spent nuclear fuel. 26. EDGE JOINT-A joint between the edges of two or more parallel or nearly parallel members. 27. EDGE PREPARATION - The surface prepared on the edge of a member for welding. 28. EFFECTIVE LENGTH OF WELD - The length of weld throughout which the correctly proportioned cross section exists. Jn a curved weld, it shall be measured along the axis of the weld. 29. EFFECTIVE THROAT - The minimum distance from the root of a weld to its face less any reinforcement. See also joint penetration. 30. ESSENTIAL VARIABLES - Essential variables arc those in which a change, as described in the specific variables, is considered to affect the mechanical properties of the weldment, and shall require requalificalion of the WPS. 31 . HEAT-AFFECTED ZONE - That portion of the base metal which has not been melted, but whose mechanical properties or microstructurc have been altered by the heat of welding, brazing, , or cutting. 32. INADEQUATE JOINT PENETRATION -Joint penetration which is less than that specified. 33. INNER COVER - The inner lid of the canister that can be identified by the cut-out which fits around the vent and siphon block. 34. FACE OF WELD - The exposed surface of a weld on the side from which welding was done. 35. FILLER METAL (material) -The metal (material) to be added in making a welded, brazed, or soldered joint. See electrode, welding rod, backing filler metal, brazing filler metal, diffusion aid, solder, and spray deposit. 36. FILLET WELD - A weld of approximately triangular cross section joining two surfaces approximately at right angles to each other in a lap joint, T-joint or comer joint. 37. FLAW· A near synonym for discontinuity but with an undesirable connotation. See defect and discontinuity. 38. FULL FILLET WELD - A fillet weld whose size is equal to the thickness of the thinner member joined. 39. GAS MET AL ARC WELDING (GMA W) - An arc welding process which produces coalescence of metals by heating them with an arc between a continuous filler metal (consumable) electrode and the work. Shielding is contained entirely from an externally supplied gas or gas mixture. Some methods of this process are called MIG or CO2 welding (non preferred terms). 40. GROOVE ANGLE - The total included angle of the groove between pans to be joined by a groove weld. 41. GROOVE WELD - A weld made in the groove between two members to be joined. 42. INTERMITTENT WELD - A weld in which the continuity if broken by recurring unwelded spaces. 43. INTERPASS TEMPERATURE . In a multiple-pass weld, the temperature (minimum or maximum as specified) of the deposited weld metal before the next pass is started. 44. JOINT - The junction of members or the edges of members which are to be joined or have been joined. 45. JOINT PENETRATION - The minimum depth a groove or flange weld extends from its face into a joint, exclusive of reinforcement. Joint penetration may include root penetration. See also complete joint penetration, root penetration, and effective throat.

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46. NONESSENTIAL VARIABLE - Nonessential variables are those in which a change, as described in the specific variables, may be made in the WPS without requalification. 47. OUTER COVER-The outer lid of the canister. 48. OVERLAP - The protrusion of weld metal beyond the toe, face, or root of the weld; in resistance seam welding, the area in the preceding weld remelted by the succeeding weld. 49. OXIDIZING FLAME -An oxyfuel gas flame have an oxidizing effect (excess oxygen). 50. OX\'ACETYLENE CUITING (OFC-A) - An oxyfuel gas cutting process used to sever metals by means of the chemical reaction of oxygen with the base metal at elevated temperatures. The necessary temperature is maintained by gas flames resulting from the combustion of acetylene with oxygen. 51. OXYFUEL GAS CUTTING (OFC) - A group of cutting processes used to sever metals by means of the chemical reaction of oxygen with the vase metal at elevated temperatures. The necessary temperature is maintained by means of gas flames obtained from the combustion of a specified fuel gas and oxygen. See oxygen cutting, oxyacetylene cutting oxyhydrogen cutting, oxynatural gas cutting, and oxypropane cutting. S2. OXYGEN CUTTING (OC) - A group of cutting processes used to sever or remove metals by means of the chemical reaction of oxygen with the base metal at elevated temperatures. In the case of oxidation-resistant metals, the reaction is facilitated by the use of a chemical flux or metal powder. See oxygen arc cutting oxyfuel gas cutting, oxygen lance cutting, chemical flux cutting and metal power cutting. 53. PARENT METAL-See preferred term base metal. 54. PARTIAL JOINT PENETRATION - Joint penetration which is less than complete. The depth of effective throat is taken from the design drawing. See also complete joint penetration. 55. PASS - A single progression of a welding or surfacing operation along a joint, weld deposit or substrate. The result of a pass is a weld bead, layer or spray deposit. 56. PEENING - The mechanical working of metals using impact blows. 57. PREHEAT TEMPERATURE-A specified temperature that the base metal must auain in the welding, brazing, soldering, thermal spraying, or cutting area immediately before these operations are performed. 58. PROCEDURE - The detailed elements (with prescribed values or ranges of values) of a process or method used to produce a specific result. 59. PROCEDURE QUALIFICATION - The demonstration that welds made by a specific procedure can meet prescribed standards. 60. REDUCING FLAME - A gas flame having a reducing effect (Excess fuel gas). 61 . REVERSE POLARITY - The arrangement of direct current arc welding with the work as the negative pole and the electrode as the positive pole of the welding arc. A synonym for direct current electrode positive. 62. ROOT OF JOINT - That portion of a joint to be welded where the members approach closest to each. In cross section the root of the joint may be a point, a line or an area. 63. ROOT OF WELD-The points, as shown in cross section, at which the back of the weld intersects the base metal surfaces. 64. ROOT OPENING - The separation between the members to be joined at the root of the joint. 65. ROOT PENETRATION -The depth that a weld extends into the root ofajoint measured on the centerline of the root cross section. 66. SHIELDED MET AL ARC WELDING (SMAW) - An arc welding process which produces coalescence of metals by heating them with an arc between covered metal electrode and the work. Shielding is obtained

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from decomposition of the electrode covering. Pressure is not used and filler metal is obtained from the electrode. 67. SINGLE-WELDED JOINT - In arc and gas welding, any joint welded from one side only. 68. SIZE OF WELD • Groove Weld - The joint penetration (depth of bevel plus the root penetration when specified). The size of a groove weld and its effective throat are one and the same. • Fillet Weld - For equal leg fillet welds, the leg lengths of the largest isosceles right triangle which can be inscribed within the fillet weld cross section. NOTE: When one member makes an angle with the other member greater than 105 degrees, the leg length (size) is of less significance than the effective throat which is the control ling factor for the strength of a weld. 69. SLUGGING - The act of adding a separate piece or pieces of material in a joint before or during welding that results in a welded joint not complying with design, drawing, or specification requirements. 70. SPA TIER - In arc and gas welding, the metal particles expelled during welding and which do not fonn a part of the weld. 71. STRAIGHT POLARITY. The arrangement of direct current arc welding in which the work is the positive pole and the electrode is the negative pole of the welding arc. A synonym for direct current electrode negative. 72. STRESS RELIEF HEAT TREATMENT - Uniform heating of a structure or a portion thereof to a sufficient temperature to relieve the major portion of the residual stresses, followed by uniform cooling. 73. TACK WELD - A weld made to hold parts of a wcldment in proper alignment until the final welds arc made. 74. THROAT OF A FILLET WELD • Theoretical Throat • The distance from the beginning of the root of the joint perpendicular to the hypotenuse of the largest right triangle that can be inscribed within the fillet weld cross section. • Actual Throat -The shortest distance from the root of the fiJlet weld to its face. • Effective Throat . The minimum distance minus any reinforcements from the root of a weld to its face. 75. TOE OF WELD. The junction between the face of a weld and the base metal. 76. UNDERBEAD CRACK. A crack in the heat-affected zone generally not extending to the surface of the base material. 77. UNDERCUT - A groove melted into the base metal adjacent to the toe or root of a weld and left unfilled by weld metal. 78. UNDERFILL. A depression on the face of the weld or root surface extending below the surface of the adjacent base metal. 79. WASH PASS - Weld pass made without the addition of filler metal. 80. WELD - A localized coalescence of metals or non-metals produced either by heating the materials to suitable temperatures, with or without the application of pressure, or by the application of pressure along, and with or without the use of filler material. 81. WELD ABILITY - The capacity of a material to be welded under the fabrication conditions imposed into a specific, suitably designed structure and to perfonn satisfactorily in the intended service.

Page 16 of 29 Spent Fuel Cask Welding -61BT/BTH NUHOMS Canisters 12751-MNGP-OPS-Ol, REV 0

ATT ACHM ENT 9.2 Page 1 of3

Weld Map Page 1 DSC Serial Number ------

N[[TES1 l> JNTERPRET VELDS PER ANSI/A\IS 2,4 2> ALL VELDS SIW.l. CONTAIN A MINIIU4 TVD <2> LAYERS THRDlGI TI£ THICICNESS CF \/ELD 3) VERIFY THAT SERIAL NIJIBERS or TCP SHiaD PUE, TOP CDV£R PLATES NDJ n£ BASKET-SlELL ASSEMBLY ARE IDENTICAL 0 FJELD WELD ]Nt£R TIF CDVER PLA 1£ m ITEMS 2 L 3 AFTER SPENT rw. ASSEMBLIES AND TDP SHI£LD EATH ITEM 12 lMHEDIATELY PRIOR TO \/El.Dir£ n£ IJELD CRO'JN SHALL NlT PRO.l:CT ABOVE TI£ SlRRIIJNDmj smf'ACE OF' THE SIPID AND VENT BUl:K fOE THAN .06. CiRINDlNG IS TO lE MINIMIZ[]) \ll£RE REQUIRED. ~ INSTALL MER 1lf COVER PLATE (ITEM 10), rilND PERJt£TER AS NEEDED TO FJT. ALIGJ ~ WITH MARKS m s~ If' l[f IF ITEM 10 IS ABOVE END Dr CANISTER SHELL, BmRE \/El.DING VERIFY THAT MAXDtJM CANISTER LENGTH IS NIJT EXCEEW>1.~D THAT MINIMUM VELD JE>TH IS l/2 INCH. VELD RCDT PASS, COlf>LETE l£LIUM LEAK TEST !NU, THEN CDMPLETE lfilDIMi AND NDE DF IT£M 10 AND TEST PORT PLUG ITEM 14, 7> SEE: IRA\JlNG tui61BTH-3000 FDR TYPE i DSC AND tm61BTH-4DOO FDR TYPE 2 DSC PARTS UST. 8) VELD MATERIALS, VELDING, EXAMINATION AND I/ELD REPAIR PER ASHE BtcPV CllDE SECTil:N III, SUBSECTJDN NB, 1998 EDITION VITH 2000 ADDENDA, w'ITH EXCEPTIIM AS LISTED IN LICENSE DOClKNTS. PT ACCEPTANCE STANDMD PER SUBSECTI~ NB-5350. 9) I.OW CARBON FILLER MATERIALS <'L' GREAlI> ARE PERMITTED, PROVIDED SUCH MATERIAL PRODUCES 80 ksl MINIMUM TENSILE STRE~TH IN T~ AS-\IEUlED CDNDITI!lt,l 10) ROOT "ELDS SHALL BE · LIMITED TD ~ smr LAYER, IHTERMITTANT TACK VELDS ARE NOT CDNS11£RED A LAYER /WD ARE TtEREFIRE PART Of n£ ROOT PASS REfJARDLESS CF TI£ HEOOD IT TfER INCDRPDRATIIJN.

Page 17 of 29 Spent Fuel Cask Welding-61BT/BTH NUHOMS Canisters 12751-MNGP-OPS-01, REV 0

ATIACHMENT 9.2 Page 2 of3

Weld Map Page 2 DSC Serial Number ------

ITEM QTY NOMENCLATURE OR DESCRIPTION 2 1 CANISTER SHELL 9 1 TOP SHIELD PLUG 11 1 INNER TOP COVER JO 1 OUTER TOP COVER 3 1 VENT & SIPHON PORT BLOCK 12 2 VENT & SIPHON COVER PLATE 14 l TEST PORT PLUG

Page 18 of 29 12751-MNGP-OPS-01, Rev 0, AIT ACHMENT 9.2 Page 3 of3

Weld Map Page 3 DSC Serial Number ______

'•EUl 4 'IJCLDS 2 L 3 " ~a>, ~~2?\.ACES'cl' ~ . _J_ l.EV~S ~ \ ~DOT. [V RY 2 VELS 27 MAX L !',;AL P \ Rohl I. CDV[q I \ \ ... \/El.II ! I

@)

@ ® ©

Page 19 of 29 12751 MNGP-OPS-01, Rev 0, Attachment 9.3 Page I of6 Weld Data Shfft Quality Level 12 I DSC Serial No.: I Welder QuaUfication Verified: Const/Design Code I ASME III Sub NB I WPS/Rev: SS-8-M-TN Rev & ss-8-A-TN Rev- I WPS Verified: Backing Ring: I NIA I Preheat Minimum: I 60F I lnterpass Maximum: f 3SO F I Drawing/Revision: I NUH61BTH-4008 Rev.I . ' c,- -,,• r7""!,.. ., ~ ~~ . - ·- - .,:: ~ s3; -,-~,- -~ -;.- ·~-... -- ~,;" [;'~ ~' "~! : ' ·- .... =.,,, -··~ ,;:_:~J ·" ---:~:,r ~- ~""l-:P!'.J 'ill" ..~ ;...I• ,:',&,.~~ INSPECTION RMUIREMENTS Attribute Weld# 1 Weld # 1 KeYWaV Weld#2 Weld#3 - Weld#4 Weld #5 ! Rydroien Check Required Required Not Required Not Required Not Required - Not Required l Flt Up lnsp«tion Required Required Required I Required Required --- Required J Preheat Verified by by by ! by I by by 0.060 inch and not 0.060 inch and not to Maximum 0.250 inch 0.060 inch 0.060 inch 0.060inch to exceed the top of exceed the top of the Reinforcement the shell course. shell course. I -- Preheat/Inter-pass Temp (SeeWPS) (SeeWPS) (See WPS) (SeeWPS) (See WPS) (SeeWPS) I Interpass Verified by by by by I by by lnterpass Verified by by by by ! by by lnterpass Verified by by_, _ t by by l by ·- by - VT Fit up - ·- Required Required Required Required Required Required Initiate Attachment 9.3 Re(luired Re(luired Required Required Required Required Initiate Attachment 9.4 Not Required Not Required Not Required Not Required Required Not Required Tack VT Only Required Required Required Required Required Required . .. Root VT/PT Required Required Required Required Required Required Faller Pass VT/PT NI A NIA NIA NfA Required NIA At F111sh: Complete Not Required Not Required Not Required Not Required Required ' Not Required Attachment 9.4 I Welding Supervisor sign Required Required Required Required Required Required off, prior to NDE Final VT/PT I Required Required Required I Required Required Required Helium Leak Test I Required Required Required ---Required Not Required Not Required Welder ID ·- Welder ID - - " ER308 ER308 ER308 ER308 ER308 ER308 Filler Metal Type ,._ - - FDler Metal Size --- (See WPS) (SeeWPS) (See WPS) (SeeWPS) (SeeWPS) (See WPS) Trace No (Heat/Lot) '-- PagelO ofl9 i

127St-MNGP-OPS-OJ, Rev 0, Attachment 9.3 Page 2 of6

VT/PT EXAMINATION Customer/Project: EXAMINATION METHOD AND PROCEDURE Examination Date: Work Order Number: 0 Direct Visual: 121s1-MNGP -QP-9.201 Rev.-- Exam Surface: IMer Lid ComE!Qnents DSC Number: 0 Dye Penetrant: 121s1-MNGP -QP-9.202 Rev. -- Drawing No: :t;IUH61BTH-400~ Rev.I

ILLUMINATION COMPONENT TEMPERATURE PENETRANT MATERIAL Light Meter Number: Device Number: Brand: Sherwin Date Calibrated: Date Calibrated: Penetrant: K,017 Batch: Calibration Due Date: Calibration Due Date: Remover: K019 Batch: Developer: D350 Batch: vr PT Weld No Weld Foot Acceptor Examiner Foot Surface. Aueptor Gauge Date Exa ..i•er Date Note Candles Reject Initial$ Candles Tempnature Reject Weldl Inner Top Cover To Shell: NIA NIA NIA NIA NIA NIA NIA Fit up& Tack Weld Keyway Wddl NIA Inner Top Cover 4 To Shell: Lid/Shell NIA Root Weld 4 Keyway Weld 1 NIA l11ner Top Cover 4 ToSlleU Lid/Shell NIA Final Weld 4

EXAMINER: LEVEL: -- Print Name Signature Date EXAMINER: LEVEL: -- Print Name Signature Date

Page 21 of29 12751-MNGP-OPS.Ol, Rev 0, Attachment 9.3 Page 3 of 6

VT/Ff EXAMINATION REPORT Customer/Project: EXAMINATION METHOD AND PROCEDURE Examination Date: Work Order Number: 0 Direct Visual: 121s1-MNOP-QP-9.201 Rev.__ Exam Surface: KenYay ~2m122nents DSC Number: D Dye Penetrant: 121s 1-MNGP -QP-9.202 Rev. -- Drawing No: NUH61BTH-4008 Rev.I ILLUMINATION COMPONENT TEMPERATURE PENETRANT MATERIAL Light Meter Number: Device Number: Brand: Sherwin Date Calibrated: Date Calibrated: Penetrant: KOl7 Batch: Calibration Due Date: Calibration Due Date: Remover: K019 Batch: . Developer: 0350 Batch: VT PT Weld No Weld Foot Acceptor Examiner Foot Surface Accept or Examiner Ga.ge Date Dale Note Candles Reject l•ltials Caadles Temperature Reject Initials

Weld2 Siphon Port: Fhup&Tack s NIA NIA NIA NIA NIA NIA Weld

Weldl Siphon Port: 5 NIA Root Weld

Weldl Slpllon Port: 5 NIA FlatlWtld

EXAMINER: LEVEL: _ Print Name Signature Date

EXAMINER: LEVEL: Print Name -- Signature Date

Page22 of29 12751-MNGP·OPS-Ot, Rev 0, Attachment9.3 Page4 of6

VT/PT EXAMINATION REPORT Customer/Project: EXAMINATION METHOD AND PROCEDURE Examination Date: Work Order Number: 0 Direct Visual: 121s1.MNGP-Qf>-9.201 Rev.-- Exam Surface: Ke~a:'i Com~nents DSC Number: D Dye Pcnetrant: 121s1-MNGP-QP-9.202 Rev. -- Drawing No: NUH61BTH-4008 Rev.I

ILLUMINATION COMPONENT TEMPERATURE PENETRANT MATERIAL Light Meter Number: Device Number: Brand: ~ben!!:'.ia Date Calibrated: Date Calibrated: Penetrant: K017 Batch: Calibration Due Date: Calibration Due Date: Remover: K019 Batch: Developer: DJ~Q Batch: VT PT Weld No Weld Foot Accept or Examiner Foot Surface Accept or Examiner GHge Date Date Note Candles Reject Initials Candles Temperat.re Reject lllltlals Wcld3 Vent Port: 5 NIA NIA NIA NIA NIA NIA Fit•p& Tack Weld

Weld3 Vent Port: 5 NIA Root Weld

Weld3 Vent Port: 5 NIA Final Weld

EXAMINER: LEVEL:_ Print Name Signature Date

EXAMINER: LEVEL: -- Print Name Signature Date

Page23 of29 127St~MNGP-OPS-Ol, Rev OAttachment 9.3 Paee s of 6 VT/PT EXAMINATION REPORT Customer/Project: EXAMINATION METHOD AND PROCEDURE Examination Date: Work Order Number: D Direct Visual: 121s1.MNGP-QM.201 Rev.-- Exam Surface: Quter Lid CQ!l!L?QD!.:D!~ DSC Number: D Dye Penetrant 12,s1-MNGP ·QM.202 Rev. -- Drawing No: NUH61BTH-4008 Rev.I

ILLUMINATION COMPONENT TEMPERATURE PENETRANT MATERIAL Light Meter Number: Device Number: Brand: Sherwin Date Calibrated: Date Calibrated: Penetrant: KQIZ Batch: Calibration Due Date: Calibration Due Date: Remover: K,019 Batch: Developer: D350 Batch: VT PT Weld No Weld Foot Acceptor Examiner Foot Surface. Ac«pt or Gaugr Date Examiner Date Note Cndtes Reject lnllltls C.ndles Te111pers1ure Reject Wdd4 Outer Top Cover To Sllcll: Fit up 6 NIA NIA NIA NIA NIA NIA &Tack Wetd Weld4 Outer Top Cover To Slacll: Root 6 NIA Weld Weld4 Outer Top Cover ToSllel: 6 NIA I atermedtate Weld Weld4 Oata- Top Cover To Shell: Final 6 Weld

EXAMINER: LEVEL: -- Print Name Signature Date EXAMINER: LEVEL: -- Print Name Signature Date

Page24 of29 127S1-MNGP-OPS-01, Rev O, Attachment 9.3 Pa1e 6 of 6 VT/PT EXAMINATION REPORT Customer/Project: EXAMINATION METHOD AND PROCEDURE Examination Date: Work Order Number: D Direct Visual: 121s1-MNGP-QP-9.201 Rev._ Exam Surface: Qyter Lid C2m122~!l!~ DSC Number: D Dye Penetrant: 121s1-MNOP-OP-9.202 Rev. - Drawing No: NUH61BTH-4QQ~ Rev,) ILLUMINATION COMPONENT TEMPERATURE PENETRANT MATERIAL Light Meter Number: Device Number: Brand: Sherwin Date Calibrated: Date Calibrated: Penetrant: K017 Batch: Calibration Due Date: Calibration Due Date: Remover: K019 Batch: Developer: D350 Batch: VT PT Weld No Weld FOOi Acceptor Examiner Foot Surratt. Acceptor Guae Date Examiner Date Note Candles Reject Initials Candles Temperature Reject Weld5Tesl Plua: 6 NIA NIA NIA NIA NIA NIA I ostall PIUJ

Weld5Test Plue: 6 NIA RootWeJd

Weld5Test Plu&: 6 NIA FiaalWekl

EXAMINER: LEVEL: -- Print Name Signature Date EXAMINER: LEVEL: - Print Name Signature Date

Page25of29 12751-MNGP-OPS-01 RO: Spent Fuel Cask Welding-6lBT/BTH NUHOMS Canisters

AIT ACHMENT 9.4: Fit up/ High-Low / Depth Record DSC Serial Number ------

4 ll)Qllt punch mara are 10 be made as references fo1 ongo111g depth measurements They are ID be located approx 90 degrees apart.

" Record Fklsh if weld c,p is bh or higher

Record lhe Meas11ing E~ent used:

Depth Measurements for Weld Weld#4 0 degree 90 degree 180 degree 270degree Initial Depth Root Layer lntennediate Layer Final

NOTE: "NIA" all of the sections that do not apply.

Page26 of29 12751-MNGP-OPS-Ol RO: Spent Fuel Cask Welding- 61BT/BTH NUHOMS Canisters

ATTACHMENT 9.5 Page 1 of 3 Field Comment and/or Repair Log

Note: Maior Weld Reoair is deli11e,l ill Sectio11 8. I 0.3. WELD REPAIR LOG (Addltloul sheets IHY be attached lhecessan\ DSC No Weld No. Welder ID WPS Weld Filler Metal

Weld Repair Details and Sketch

DSCNo Weld No Welder ID WPS Weld Filler Metal

Weld Repair Details and Sketch

DSCNo Weld No Welder ID WPS Weld FiDer Metal

Weld Repair Details and Sketch

Page 27 of29 12751-MNGP-OPS-Ol RO: Spent Fuel Cask Welding- 61BT/BTH NUHOMS Canisters

A TIACHMENT 9.5 Page2of3 Field Comment and/or Repair Log

WELD INFORMATION INSPECTION REQUIREMENTS Quality Level Coast/Design Code Repair No. Repair No. Repair No. ASME Ill Sub NB Attribute

DrawJag/Revision Preheat Minimum Base Material 1 NUH6JBTH-4008 Rev.I 60F s....-1ncatlon WPS/Rev lnterpass Maximum Base Material I 350F TraceabiUtv Backing Ring Purge Base Material 2 NIA s-mcatlon WPS Verlfled:: Base Material l Traceabllltv Welder Qualification Verified: Hydroien Check NOTES: Fit Up Inspection Nominal Plate Thickness Effective Throat Maximum Reinforcement Repair# Prebeat/Interpass Temnerature Root Gap Umit

Purge

Tack VT Only Repair# Root VT /PT

Final VT /PT Helium Leak Test after PT Welder ID Repair# Welder ID

Filler Metal Type

Filler Metal Size Trace No. (Heat/Lot)

Page28 of29 12751-MNGP-OPS-Ol RO: Spent Fuel Cask Welding- 61BT/BTH NUHOMS Canisters

ATT ACHM ENT 9.5: Field Comment and/or Repair Log Pasr.e 3 0 f3 VT/PT EXAMINATION REPORT Customer/Project: EXAMINATION METHOD AND PROCEDURE Examination Date: Work Order Number: 0 Direct Visual: 12751-MNGP-QP-9.201 Rev.__ Ex.am Surface: DSC Number: 0 Dye Penetrantl2751-MNGP-QP-9.202 Rev. - Drawing No: NUH61BTH-4008 Rev.1 ILLUMINATION COMPONENT TEMPERATURE PENETRANT MATERIAL Light Meter Number: Device Number: Brand: Sherwin Date Calibrated: Date Calibrated: Penetrant: K017 Batch: Calibration Due Date: Calibration Due Date: Remover: KOl9 Batch: Developer: Q3~Q Batch: VT PT Weld No Weld Foot Acceptor Examiner Foot Surface. Attepl or Gauee Date Eumlner Date Note Candles Reject Initials Candles Temper•t•re Reject

EXAMINER: LEVEL: Print Name - Signature Date EXAMINER: LEVEL: - Print Name Signature Date

Page29 of29