virginia electric and power company richmond. … · water stress corrosion cracking (pwscc)...

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND. VIRGINIA 23261

January 3, 2007

U.S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 1 1555 Rockville Pike Rockville, MD 20852-2738

Serial No. 06-1 007 NLOS IETS Rev 2 Docket Nos. 50-3381339 License Nos. NPF-417

VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION) NORTH ANNA POWER STATION UNlT 1 - CMP-022 NORTH ANNA POWER STATION UNlT 2 - CMP-023 USE OF WELD OVERLAYS AS AN ALTERNATIVE REPAIR TECHNIQUE

Pursuant to lOCFR50.55a(a)(3)(i), Dominion requests approval to use the American Society of Mechanical Engineers (ASME) Code Case ~ -740( ' ) to apply dissimilar metal weld overlays for repairlreplacement activities. This request contains alternative requirements for the lnservice Inspection (ISI) program for scheduled full structural preemptive weld overlays (PWOLs) that are planned to mitigate the potential for primary water stress corrosion cracking (PWSCC) susceptibility at North Anna Units 1 and 2. Attachment 1 contains the Request CMP-022 for North Anna Unit 1 and Request CMP-023 for North Anna Unit 2. Enclosure 1 contains a copy of Code Case N-740.

Without the use of PWOLs, the current configuration and geometric limitations of these welds do not permit an ASME Code Section XI, Appendix VIII, Supplement 10, ultrasonic examination that will obtain the required coverage. Consequently, PWOLs for mitigation of potential PWSCC susceptibility are scheduled for the North Anna Unit 2 spring 2007 and the North Anna Unit 1 fall 2007 refueling outages, and no pre-weld overlay ultrasonic examinations are planned. This is part of the control and remediation plan for Alloy 600/82/182 dissimilar metal piping butt welds susceptible to potential PWSCC at North Anna Units 1 and 2.

Dominion has been actively monitoring industry1NRC activities associated with the alternative weld repair technique, including the circumferential indication in the pressurizer nozzles identified at Wolf Creek and the numerous Requests for Additional Information received by other utilities who have requested use of the alternative repair technique. Dominion delayed this submittal for the use of the proposed alternative in an attempt to address the technical issues being raised in these other similar requests. Although additional questions continue to be identified on other pending requests, the need for an alternative repair technique to support our industry commitment to address

('I ASME Code Case N-740, "Dissimilar Metal Weld Overlay for Repair of Class 1, 2, and 3 Items Section XI, Division 1 ," July 14, 2006.

Serial No. 06-1007 Docket Nos. 50-3381339

Alternative Requests CMP-0221023 of 3

the generic concern necessitates submittal at this time. Dominion requests review and approval of this request to support implementation of the alternative repair technique during the upcoming North Anna Unit 2 spring 2007 and North Anna Unit 1 fall 2007 refueling outages. Similar alternatives have been submitted for NRC review and approval and these are referenced in the attached request. Dominion is submitting this request based on the recent ASME approval of Code Case N-740.

If you have any questions regarding this submittal, please contact Mr. Thomas Shaub at (804) 273-2763.

Very truly yours,

~ e r a l d T. Bischof Vice President - Nucl

Attachment

1. Alternative Request CMP-022 for Unit 1 and CMP-023 for Unit 2, Use of Weld Overlays as an Alternative Repair Technique with Enclosure 1

Commitments made in this letter:

None


Alternative Requests CMP-022/023 of 3

cc: U.S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW Suite 23T85 Atlanta, Georgia 30303

Mr. J. E. Reasor, Jr. Old Dominion Electric Cooperative lnnsbrook Corporate Center 4201 Dominion Blvd. Suite 300 Glen Allen, Virginia 23060

Mr. J. T. Reece NRC Senior Resident lnspector North Anna Power Station

Mr. S. P. Lingam NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North 1 1555 Rockville Pike Mail Stop 8-HI2 Rockville, Maryland 20852

Mr. R. E. Martin NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North 1 1 555 Rockville Pike Mail Stop 8-HI 2 Rockville, Maryland 20852

Mr. M. M. Grace Authorized Nuclear Insurance lnspector North Anna Power Station

Serial No. 06-1 007 Docket Nos. 50-3381339

ATTACHMENT 1

ALTERNATIVE REQUEST CMP-0221023 USE OF WELD OVERLAYS AS AN ALTERNATIVE REPAIR TECHNIQUE

NORTH ANNA POWER STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)


Alternative Requests CMP-0221023 Attachment 1 Page1 of 14

ALTERNATIVE REQUESTS CMP-022123 USE OF WELD OVERLAYS AS AN ALTERNATIVE REPAIR TECHNIQUE

Proposed Alternative In Accordance with 1 0 CFR 50.55a(a) (3) (i)

- Alternative Provides Acceptable Level Of Quality And Safety -

1.0 REASON FOR THE REQUEST

Dissimilar metal welds, primarily consisting of Alloy 8211 82 weld metal are frequently used in pressurized water reactor (PWR) construction to connect stainless steel pipe and safe ends to vessel nozzles, generally constructed of carbon or low alloy ferritic steel. These welds have shown a propensity for primary water stress corrosion cracking (PWSCC) degradation, especially in components subjected to higher operating temperatures, such as the pressurizer.

During the upcoming North Anna Unit 2 spring 2007 and North Anna Unit 1 fall 2007 refueling outages, six Class 1 dissimilar metal welds located on the pressurizer for each unit are currently scheduled to have full structural preemptive weld overlays (PWOLs) applied. Repairlreplacement activities associated with PWOL repairs are required to address the materials, welding parameters, ALARA concerns, operational constraints, examination techniques and procedure requirements for repairs. Comprehensive and generic NRC approved criteria are, however, not currently available for application of PWOL repairs to dissimilar metal welds constructed of Alloy 821182 weld material for mitigation of potential primary water stress corrosion cracking (PWSCC).

The welding will be performed using a remote machine gas tungsten-arc welding (GTAW) process and using the ambient temperature temper bead method with ERNiCrFe-7A (Alloy 52M) weld metal. Manual GTAW, using ERNiCrFe-7 (Alloy 52) or Alloy 52M will be used if local repairs of weld defects are necessary or additional weld metal is required locally to form the final PWOL contour in locations at least 311 6 in. away from the low alloy steel nozzles.

2.0 CODE COMPONENTS FOR WHICH THE ALTERNATIVE IS REQUESTED

Code components associated with this request are the high safety significant (HSS) Class 1 dissimilar metal welds with Alloy 821182 weld metal that are believed to be susceptible to PWSCC. There are six welds that are scheduled to have full structural PWOLs applied.

2.1 Category and System Details:

Code Class: Class 1 System Welds: Reactor Coolant System Examination Categories: R-A* *Welds are included in the Risk Informed lnservice Inspection Program


Alternative Requests CMP-0221023 Attachment 1 Page2of 14

2.2 Component Descriptions:

The application of this alternative to apply PWOLs on the six potentially PWSCC susceptible safe end-to-pressurizer nozzle welds will also involve extending the weld overlay across the adjacent stainless steel pipelfittinglelbow-to-safe end welds. Unit 1:

1. Weld No. SW-51, 14-inch RCS Safe End Reducer-To-Surge Nozzle Weld and adjacent Pipe-to-Safe End Reducer Weld No. 39 (Pipe ldentifier 14-RC-10-2501 R-Q1)

2. Weld No. SW-30, 6-inch Safe End-to-Safety Nozzle-Weld and adjacent Elbow-to-Safe End Weld No. 21 (Pipe ldentifier 6-RC-38-1502-Q1)

3. Weld No. SW-31, 6-inch Safe End-to-Safety Nozzle-Weld and adjacent Elbow-to-Safe End Weld No. 17 (Pipe ldentifier 6-RC-39-1502-Q1)

4. Weld No. SW-38, 6-inch Safe End-to-Safety Nozzle-Weld and adjacent Elbow-to-Safe End Weld No.25 (Pipe ldentifier 6-RC-37-1502-Q1)

5. Weld No. SW-64, &inch Safe End-to-Relief Nozzle-Weld and adjacent 6x4 Concentric Reducer-to-Safe End Weld No. 30 (Pipe ldentifier 4-RC-34-1502-Q1)

6. Weld No. SW-71, 4-inch Safe End-to-Spray Nozzle-Weld and adjacent Pipe-to-Safe End Weld No. 1 1 (Pipe ldentifier 4-RC-15-1502-Ql)

Unit 2: 1. Weld No. SW-5, 14-inch RCS Safe End Reducer-To-Surge Nozzle Weld and adjacent

Pipe-to-Safe End Reducer Weld No. 1 (Pipe ldentifier 14-RC-410-2501 R-QI) 2. Weld No. SW-6, 6-inch Safe End-to-Safety Nozzle-Weld and adjacent Elbow-to-Safe

End Weld No. 1 (Pipe ldentifier 6-RC-437-1502-Q1) 3. Weld No. SW-9, 6-inch Safe End-to-Safety Nozzle-Weld and adjacent Elbow-to-Safe

End Weld No. 1 (Pipe ldentifier 6-RC-438-1502-Q1) 4. Weld No. SW-17, 6-inch Safe End-to-Safety Nozzle-Weld and adjacent Elbow-to-Safe

End Weld No. 1 (Pipe ldentifier 6-RC-439-1502-Q1) 5. Weld No. SW-40, 6-inch Safe End-to-Relief Nozzle-Weld and adjacent 6x4 Concentric

Reducer-to-Safe End Weld No. 1 (Pipe ldentifier 4-RC-434-1502-Q1) 6. Weld No. SW-62, 4-inch Safe End-to-Spray Nozzle-Weld and adjacent Pipe-to-Safe

End Weld No. 42 (Pipe ldentifier 4-RC-415-1502-Q1)

2.3 Component Materials:

1. Nozzles are (P-No. 3 Group No. 3) Low Alloy Steel SA-508 CL2 2. Safe End-to-Nozzle Weld and Buttering are Alloy 8211 82 (F-No. 43) 3. Safe Ends are (P-No.8) Wrought Stainless Steel (SS) SA-182 GR F316L 4. Surge Line Pipe, Safety Line Elbows, Relief Line Reducer and Spray Line Pipe are

(P-No. 8) Wrought Seamless SS and Welds are SS (A-No. 8)


Alternative Requests CMP-0221023 Attachment 1 Page 3 of 14

3.0 CODE REQUIREMENTS FOR WHICH THE ALTERNATIVE IS REQUESTED

North Anna Unit 1 is currently in the third ten-year lnservice lnspection (ISI) interval (May 1, 1999 through April 30, 2009). The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code of record for the current 10-year IS1 interval is Section XI, 1989 Edition (Reference 1). This is also the version used for the RepairIReplacement Program.

North Anna Unit 2 is currently in the third ten-year lnservice lnspection (ISI) interval (December 14, 2001 through December 13, 2010). The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code of record for the current 10-year IS1 interval is Section XI, 1995 Edition, including Addenda through 1996 (Reference 2). This is also the version used for the RepairIReplacement Program.

IWA-4000 does not address all the necessary requirements for this type of repair. The Code requirements for which the relief is requested are contained in the following:

including 1. ASME Code Section XI, 1989 Edition for North Anna Unit 1 and 1995 Edition Addenda through 1996 for North Anna Unit 2, IWA-4000

2. ASME Code Section XI, 1989 Edition for North Anna Unit 1 and 1995 Edition Addenda through 1996 for North Anna Unit 2, Appendix VIII, Supplement 11.

including

The alternative described in Section 4.0 is proposed to permit the implementation of PWOLs at North Anna Unit 1, as an alternative for the repairlreplacernent requirements of the ASME Code Section XI, 1989 Edition, IWA-4000 (Reference 1) and North Anna Unit 2, as an alternative for the repairlreplacernent requirements of the ASME Code Section XI, 1995 Edition, including Addenda through 1 996, IWA-4000 (Reference 2).

The ultrasonic examination of the completed PWOLs will be accomplished in accordance with the ASME Code Section XI, 1989 Edition for North Anna Unit 1 and 1995 Edition including Addenda through 1996 for North Anna Unit 2, Appendix VIII, Supplement 11 (Reference 2) with the alternatives used for complying with the Performance Demonstration Initiative (PDI) Program. See Table 1.

4.0 PROPOSED ALTERNATIVES AND SUPPORTING INFORMATION

The ASME has recently approved Section XI Code Case N-740, "Dissimilar Metal Weld Overlay for Repair of Class 1, 2, and 3 Items" (Reference 3). Since the Code Case has not yet been approved for use by NRC in Regulatory Guide 1.147, the Code Case (Enclosure 1) is submitted for NRC staff review in accordance with the provisions of 10 CFR 50.55a(a)(3)(i). This Code Case is the result of the industry's experience with weld overlay repairs for flaws suspected or confirmed to be from PWSCC and for the first time directly applies to the Alloy 52 or 52M weld material that is primarily being used for these overlay repairs.

This proposed alternative requests the use of Code Case N-740 for implementing the six scheduled full structural PWOLs for the potentially PWSCC susceptible safe end-to-nozzle



welds of the pressurizer. These PWOLs will include the adjacent stainless steel eIbow/pipe/reducer-to-safe end welds. This request applies to each of the welds listed in Section 2.2, which are generically depicted in Figure 1.

A full structural PWOL (designed for the worst case flaw) will be applied in accordance with the requirements of Code Case N-740 with an ultrasonic examination following the application of the PWOL.

4.1 PWOL Assembly:

The ferritic materials of the nozzles are (P-No. 3 Group No. 3) material; the safe ends and pipelelbowlreducers are wrought stainless steel (P-No. 8) material. The existing weld filler material is Alloy 8211 82 (F-No. 43).

The full structural weld overlay satisfies all the structural design requirements of the pipe assuming no strength is contributed by the original safe end-to-nozzle welds nor the elbow/pipe/reducer-to-safe end welds, as if the welds were removed. As shown in Figure 1, this structural weld overlay (weld reinforcement) will completely cover the existing Alloy 8211 82 weld metal and will extend onto the ferritic and austenitic stainless steel material on each end of the weld, including the adjacent pipe/elbow/reducer-to-safe end weld. The weld overlay extends the full 360" around the nozzle.

4.2 Weld Overlay Design:

The PWOLs will be designed as full structural overlays (assumed worst case flaw) in accordance with ASME Section XI, Code Case N-740, Section 2, therein. The stress analysis required by Code Case N-740 will be available on site for NRC review.

4.3 Examinations:

The examinations will meet requirements of the Code Case N-740, excluding ultrasonic examination of the completed PWOL. The ultrasonic examination of the completed PWOL will be performed in accordance with ASME Code Section XI, 1989 Edition for North Anna Unit 1 and 1995 Edition including Addenda through 1996 for North Anna Unit 2, Appendix VIII, Supplement 11 with the alternatives used for complying with the PDI Program. See Table 1.

The current configuration and geometric limitations of these welds does not permit an effective ASME Code Section XI, Appendix VIII, Supplement 10, ultrasonic examination that will obtain the required coverage of the examination volume. Four of the six dissimilar welds on each unit have examination coverage estimates of less than 50% of the required examination volume. The remaining two dissimilar metal welds are estimated as capable of achieving approximately 80% of the required examination coverage. However, it is estimated as 0.6 Rem per unit would be required to perform the ultrasonic examinations for these two welds (for a total of 1.2 Rem). Since Dominion intends to apply full-structural overlays, designed for a worse case, through-wall flaw that is 360 degrees in circumference, the dose



received from examination of these welds would result in a hardship without a compensating increase in the level of quality and safety. Therefore, none of these welds will receive a pre- weld overlay ultrasonic examination. In addition, if the welds are found with PWSCC or other unacceptable flaws during the post weld overlay ultrasonic examination, additional weld examination expansions will not be performed because there are no remaining similar trimetallic welds that are associated with the pressurizer environment that will not have been mitigated by application of the PWOL.

5.0 DURATION OF THE PROPOSED REQUEST

The alternative requirements of this request will be applied for the duration of up to and including the last outage of the current third 10-year IS1 interval which includes inservice examination requirements of Code Case N-740 (Reference 3) for the six applied weld overlay locations for each unit identified Section 2.2.

6.0 PRECEDENTS

Similar requests have been submitted to address the issues that are contained in this request. These include requests from the lndiana Michigan Power Company's, D. C. Cook Unit 2. NRC verbal approval was received on March 23, 2006, for their request, which included the application of full structural, PWOLs applied to their pressurizer dissimilar metal butt welds.

Additionally, the following requests associated with weld overlay repairs have been approved by the NRC: AmerGen Energy Company, Three Mile Island Nuclear Station, Unit 1, on July 21, 2004;(~) Constellation Energy's Calvert Cliffs Nuclear Power Plant, Unit 2, on July 20, 2005;(~) Millstone Unit 3, on January 20, 2006;(~) and lndiana Michigan Power Company, Donald C. Cook Unit 1, on February 10, 2006.(~)

(*) NRC letter, Safety Evaluation of Request for Relief from Flaw Removal, Heat Treatment and Nondestructive Examination (NDE) Requirements for the Third 10-Year Inservice lnspection Interval, Three Mile Island Nuclear Station, Unit 1 (TMI-I), (TAC No. MC1201), dated: July 21, 2004, (ADAMS Accession No. ML041670510).

(3) NRC letter, Safety Evaluation for Calvert Cliffs Nuclear Power Plant, Unit No. 2, Relief Request for Use Weld Overlay and Associated Alternative lnspection Techniques (TAC Nos. MC6219 and MC6220), dated July 20,2005, (ADAMS Accession No. ML051930316).

(4' NRC letter, Safety Evaluation of Relief Request lR-2-39 Pertaining to the Repair and lnspection of Nozzle to Safe End Weld, Weld No. 03-X-5641 -E-T at Millstone Power Station Unit No. 3 (MPS3)," (TAC No. MC8609), dated January 20,2006, (ADAMS Accession No. ML053260012).

(5) NRC letter, Safety Evaluation of Alternative Regarding Repair of Safe-End-To-Elbow Weld 1 -RC- 9-01 F at the Donald C. Cook Nuclear Plant Unit 1, (TAC No. MC8807), dated February 10, 2006, (ADAMS Accession No. ML060240355).



7.0 REFERENCES

1. ASME Code, Section XI, 1989 Edition 2. ASME Code, Section XI, 1995 Edition, including Addenda through 1996. 3. ASME Code Case N-740, Dissimilar Metal Weld Overlay for Repair of Class 1, 2,

and 3 Items Section XI, Division 1, July 14, 2006.

8.0 CONCLUSION

Similar NRC approved requests have been used to produce acceptable weld overlays when applied to dissimilar metal welds with Alloy 821182 weld material. The proposed alternative uses ASME Code Case N-740 that has been developed to cover the most recent operating experience and NRC approved criteria that are associated with similar PWOL applications. NRC Staff members have not objected to Code Case N-740 during its final approval within the ASME consensus process and therefore Dominion considers that this Case and the PDI Program provides an acceptable level of quality and safety, consistent with provisions of 10 CFR 50.55a(a)(3)(i).



SS Safe End (SA-182 F316L)

SEINonle Weld A82 RooUA182 Balance

Weld Buttering (A182)

Nozzle (SA-508 Class 2)

Figure 1 - Typical PWOL Configuration



Qualification Requirements for Full Structural Overlaid Wrought

Austenitic Piping Welds 1.0 SPECIMEN REQUIREMENTS

TABLE 1

1.1 General The specimen set shall conform to the following

PDI Program Modifications to Appendix Vlll Supplement 11

requirements. (b) The specimen set shall consist

Appendix VIII, Supplement 11 -

o f at least three specimens having different nominal pipe diameters and overlay thicknesses. They shall include the minimum and maximum nominal pipe diameters for which the examination procedure is applicable. Pipe diameters within a range of 0.9 to 1.5 times a nominal diameter shall be considered equivalent. If the procedure is applicable to pipe diameters of 24 inches or larger, the specimen set must include at least one specimen 24 inches or larger but need not include the maximum diameter. The specimen set must include at least one specimen with overlay thickness within -0.1 inches to +0.25 inches of the maximum nominal overlay thickness for which the procedure is applicable.

PDI Program:

(d) Flaw Conditions (1) Base metal flaws. All flaws must be cracks in or near the butt weld heat-affected zone, open to the inside surface, and extending at least 75% through the base metal wall. Flaws may extend 100% through the base metal and into the overlay material; in this case, intentional overlay fabrication flaws shall not interfere with ultrasonic

The Proposed Alternative to Supplement 11 Requirements

Alternative: (b) The specimen set shall consist of at least three specimens having different nominal pipe diameters and overlay thicknesses. They shall include the minimum and maximum nominal pipe diameters for which the examination procedure is applicable. Pipe diameters within a range of 0.9 to 1.5 times a nominal diameter shall be considered equivalent. If the procedure is applicable to pipe diameters of 24 inches or larger, the specimen set must include at least one specimen 24 inches or larger but need not include the maximum diameter. The specimen set shall include specimens with overlays not thicker than 0.1 inches more than the minimum thickness, nor thinner than 0.25 inches of the maximum nominal overlay thickness for which the examination procedure is applicable. Basis: To avoid confusion, the overlay thickness tolerance contained in the last sentence was reworded and the phrase "and the remainder shall be alternative flaws" was added to the next to last sentence in paragraph 1.1 (d) (1).

Alternative: (1) Base metal flaws. All flaws must be in or near the butt weld heat-affected zone, open to the inside surface, and extending at least 75% through the base metal wall. Intentional overlay fabrication flaws shall not interfere with ultrasonic detection or characterization of the base metal flaws. Specimens containing IGSCC shall be used when available. At least 70% of the flaws in the detection and sizing tests shall be cracks and the remainder shall be alternative flaws. Alternative flaw

Appendix VIII, Supplement 11 - Qualification Requirements for

Full Structural Overlaid Wrought Austenitic Piping Welds

detection or characterization of the cracking. Specimens containing IGSCC shall be used when available.

(e) Detection Specimens (1) At least 20% but less than 40% of the flaws shall be oriented within +20 degrees of the pipe axial - direction. The remainder shall be oriented circumferentially. Flaws shall not be open to any surface to which the candidate has physical or



PDI Program: The Proposed Alternative to Supplement 11

Requirements

mechanisms, if used, shall provide crack-like reflective characteristics and shall be limited by the following: (a) The use of alternative flaws shall be limited to when the implantation of cracks produces spurious reflectors that are uncharacteristic of actual flaws. (b) Flaws shall be semi elliptical with a tip width of less than or equal to 0.002 inches. Basis: This paragraph requires that all base metal flaws be cracks. Implanting a crack requires excavation of the base material on at least one side of the flaw. While this may be satisfactory for ferritic materials, it does not produce a useable axial flaw in austenitic materials because the sound beam, which normally passes only through base material, must now travel through weld material on at least one side, producing an unrealistic flaw response. To resolve this issue, the PDI program revised this paragraph to allow use of alternative flaw mechanisms under controlled conditions. For example, alternative flaws shall be limited to when implantation of cracks precludes obtaining an effective ultrasonic response, flaws shall be semi elliptical with a tip width of less than or equal to 0.002 inches, and at least 70% of the flaws in the detection and sizing test shall be cracks and the remainder shall be alternative flaws. To avoid confusion, the overlay thickness tolerance contained in paragraph 1 .l (b) last sentence, was reworded and the phrase "and the remainder shall be alternative flawsJJ was added to the next to last sentence. Paragraph 1 .l (d)(l ) includes the statement that intentional overlay fabrication flaws shall not interfere with ultrasonic detection or characterization of the base metal flaws.

Alternative: (1) At least 20% but less than 40°i0 of the base metal flaws shall be oriented within G O degrees of the pipe axial direction. The remainder shall be oriented circumferentially. Flaws shall not be open to any surface to which the candidate has physical or visual access. Basis: The requirement for axiallv oriented overlav




Full Structural Overlaid Wrought -

Austenitic Piping Welds disual access. The rules of IWA- 3300 shall be used to determine ~vhether closely spaced flaws should be treated as single or multiple flaws.

(2) Specimens shall be divided into base and overlay grading units. Each specimen shall contain one or both types of grading units.

(a)(l) A base grading unit shall include at least 3 inches of the length of the overlaid weld. The base grading unit includes the outer 25% of the overlaid weld and base metal on both sides. The base grading unit shall not include the inner 75% of the overlaid weld and base metal overlay material, or base metal-to-overlay interface.

(a)(2) When base metal cracking penetrates into the overlay material, the base grading unit shall include the overlay metal within 1 inch of the crack location. This portion of the overlay material shall not be


Requirements

fabrication flaws was excluded from the PDI Program as an improbable scenario. Weld overlays are typically applied using automated GTA W techniques with the filler metal applied in a circumferential direction. Because resultant fabrication induced discontinuities would also be expected to have major dimensions oriented in the circumferential direction axial overlay fabrication flaws are unrealistic. The requirement for using IWA-3300 for proximity flaw evaluation was excluded; instead indications will be sized based on their individual merits. Alternative: (2) Specimens shall be divided into base . , . metal and overlay fabrication grading units. Each specimen shall contain one or both types of grading units. Flaws shall not interfere with ultrasonic detection or characterization of other flaws. Alternative: (a)(l) A base metal grading unit . . . .

includes the overlay material and the outer 25% of the original overlaid weld. The base metal grading unit shall extend circumferentially for at least 1 inch and shall start at the weld centerline and be wide enough in the axial direction to encompass one half of the original weld crown and a minimum of 0.50 inch of the adjacent base material. Basis: The phrase "and base metal on both sides," was inadvertently included in the description of a base metal grading unit, The PDI program intentionally excludes this requirement because some of the qualification samples include flaws on both sides of the weld. To avoid confusion several instances of the term "cracks" or "cracking" were changed to the term "flaws" because of the use of alternative Flaw mechanisms. Modified to require that a base metal grading unit include at least linch of the length of the overlaid weld, rather than 3 inches. Alternative: (a)(2) When base metal flaws penetrate into the overlay material, the base metal grading unit shall not be used as part of any overlay fabrication grading unit.





used as part of any overlay grading unit. (a)(3) When a base grading unit is designed to be unflawed, at least 1 inch of unflawed overlaid weld and base metal shall exist on either side of the base grading unit. The segment of weld length used in one base grading unit shall not be used in another base grading unit. Base grading units need not be uniformly spaced around the specimen. (b)(l) An overlay grading unit shall

1 include the overlay material and the base metal-to-overlay interface of at least 6 square inches. The overlay grading unit shall be rectangular, with minimum dimensions of 2 inches.

(b)(2) An overlay grading unit designed to be unflawed shall be surrounded by unflawed overlay material and unflawed base metal- to-overlay interface for at least 1 inch around its entire perimeter. The specific area used in one overlay grading unit shall not be used in another overlay grading unit. Overlay grading units need not be spaced uniformly about the specimen.

(b)(3) Detection sets shall be selected from Table Vlll-S2-1. The minimum detection sample set is five flawed base grading units, ten


Requirements

Alternative: (a)(3) Sufficient unflawed overlaid weld m d base metal shall exist on all sides of the grading unit to preclude interfering reflections from adjacent flaws. Basis: Modified to require sufficient unflawed werlaid weld and base metal to exist on all sides of the grading unit to preclude interfering reflections From adjacent flaws, rather than the 1 inch requirement.

Alternative: (b)(l) An overlay fabrication grading unit shall include the overlay material and the base metal-to-overlay interface for a length of at least 1 inch. Basis: Modified to require sufficient unflawed overlaid weld and base metal to exist on all sides of the grading unit to preclude interfering reflections from adjacent flaws, rather than the I inch reauirement. Alternative: (b)(2) Overlay fabrication grading units designed to be unflawed shall be separated by unflawed overlay material and unflawed base metal-to-overlay interface for at least 1 inch at both ends. Sufficient unflawed overlaid weld and base metal shall exist on both sides of the overlay fabrication grading unit to preclude interfering reflections from adjacent flaws. The specific area used in one overlay fabrication grading unit shall not be used in another overlay fabrication grading unit. Overlay fabrication grading units need not be spaced uniformly about the specimen. Basis: (b)(2) states that overlay fabrication grading units designed to be unflawed shall be separated by unflawed overlay material and unflawed base metal- to-overlay interface for at least 1 in. at both ends, rather than around its entire perimeter. Alternative: (b)(3) Detection sets shall be selected from Table Vlll-S2-1. The minimum detection sample set is five-flawed base metal grading units, ten unflawed base metal grading units, five flawed


Alternative Requests CMP-0221023 Attachment 1 Page 1 2 of 14



unflawed base grading units, five flawed overlay grading units, and ten unflawed overlay grading units. For each type of grading unit, the set shall contain at least twice as many unflawed as flawed grading units.

(f) Sizing Specimen (1) The minimum number of flaws shall be ten. At least 30% of the flaws shall be overlay fabrication flaws. At least 40% of the flaws shall be cracks open to the inside surface.

(3) Base metal cracking used for . .

length sizing demonstrations shall be oriented circumferentially. (4) Depth sizing specimen sets shall include at least two distinct locations where cracking in the base metal extends into the overlay material by at least 0.1 inch in the through-wall direction. 2.0 CONDUCT OF PERFORMANCE

DEMONSTRATION The specimen inside surface and identification shall be concealed from the candidate. All examinations shall be completed prior to grading the results and presenting the results to the candidate. Divulgence of particular specimen results or candidate viewing of unmasked specimens after the performance demonstration is prohibited.


Requirements

overlay fabrication grading units, and ten unflawed overlay fabrication grading units. For each type of grading unit, the set shall contain at least twice as many unflawed as flawed grading units. For initial procedure qualification, detection sets shall include the equivalent of three personnel qualification sets. To qualify new values of essential variables, at least one personnel qualification set is required.

Alternative: (1) The minimum number of flaws shall be ten. At least 30% of the flaws shall be overlay fabrication flaws. At least 40% of the flaws shall be open to the inside surface. Sizing sets shall contain a distribution of flaw dimensions to assess sizing capabilities. For initial procedure qualification, sizing sets shall include the equivalent of three personnel qualification sets. To qualify new values of essential variables, at least one personnel qualification set is required. Alternative: (3) Base metal flaws used for length sizing demonstrations shall be oriented circumferentially. Alternative: (4) Depth sizing specimen sets shall include at least- two 'distinct locations where a base metal flaw extends into the overlay material by at least 0.1 inch in the through-wall direction.

Alternative: The specimen inside surface and identification shall be concealed from the candidate. All examinations shall be completed prior to grading the results and presenting the results to the candidate. Divulgence of particular specimen results or candidate viewing of unmasked specimens after the performance demonstration is prohibited. The overlay fabrication flaw test and the base metal flaw test may be performed separately.



2.1 Detection Test Flawed and unflawed grading units shall be randomly mixed. Although the boundaries of specific grading units shall not be revealed to the candidate, the candidate shall be made aware of the type or types of grading units (base or overlay) that are present for each specimen. 2.2 Length Sizing Test (d) For flaws in base grading units, the candidate shall estimate the length of that part of the flaw that is in the outer 25% of the base wall thickness. 2.3 Depth Sizing Test For the depth sizing test, 80% of the flaws shail be sized at a specific location on the surface of the specimen identified to the candidate. For the remaining flaws, the regions of each specimen containing a flaw to be sized shall be identified to the candidate. The candidate shall determine the maximum depth of the flaw in each region.




Requirements

Alternative: Flawed and unflawed grading units shall be randomly mixed. Although the boundaries of specific grading units shall not be revealed to the candidate, the candidate shall be made aware of the type or types of grading units (base metal or overlay fabrication) that are present for each specimen.

Alternative: (d) For flaws in base metal grading units, the candidate shall estimate the length of that part of the flaw that is in the outer 25% of the base metal wall thickness.

Alternative: (a) The depth sizing test may be conducted separately or in conjunction with the detection test. (b) When the depth sizing test is conducted in conjunction with the detection test and the detected flaws do not satisfy the requirements of l . l ( f ) , additional specimens shall be provided to the candidate. The regions containing a flaw to be sized shall be identified to the candidate. The candidate shall determine the maximum depth of the flaw in each region. (c) For a separate depth sizing test, the regions of each specimen containing a flaw to be sized shall be identified to the candidate. The candidate shall determine the maximum depth of the flaw in each region.





3.0 ACCEPTANCE CRITERIA 3.1 Detection Acceptance Criteria Examination procedures, equipment, and personnel are qualified for detection when the results of the performance demonstration satisfy the acceptance criteria of Table Vlll-S2- 1 for both detection and false calls. The criteria shall be satisfied separately by the demonstration results for base grading units and for overlay grading units.

3.2 Sizing Acceptance Criteria (a) The RMS error of the flaw length measurements, as compared to the true flaw lengths, is less than or equal to 0.75 inch. The length of base metal cracking is measured at the 75% through-base-metal position. (b) All extensions of base metal cracking into the overlay material by at least 0.1 inch are reported as being intrusions into the overlay material.


Requirements

Alternative: Examination procedures are qualified for detection when: (a) All flaws within the scope of the procedure are detected and the results of the performance demonstration satisfy the acceptance criteria of Table Vlll-S2-1 for false calls. (b) At least one successful personnel demonstration has been performed meeting the acceptance criteria defined in (c). (c) Examination equipment and personnel are qualified for detection when the results of the performance demonstration satisfy the acceptance criteria of Table Vlll-S2-1 for both detection and false calls. (d) The criteria in (b) and (c) shall be satisfied separately by the demonstration results for base metal grading units and for overlay fabrication grading units.

Alternative: (a) The RMS error of the flaw length measurements, as compared to the true flaw lengths, is less than or equal to 0.75 inch. The length of base metal flaws cracking is measured at the 750h through-base-metal position.

Alternative: This requirement is omitted. Basis: The requirement for reporting all extensions of cracking into the overlay is omitted from the PDI Program because it is redundant to the RMS calculations performed in paragraph 3.2(c) and its presence adds confusion and ambiguity to depth sizing as required by paragraph 3.2(c). This also makes the weld overlay program consistent with the supplement 2 depth sizing criteria.


ENCLOSURE 1

ASME CODE CASE N-740. "DISSIMILAR METAL WELD OVERLAY FOR REPAIR OF CLASS 1.2. AND 3 ITEMS

SECTION XI. DIVISION 1 ". DATED JULY 14.2006

NORTH ANNA NUCLEAR STATION UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY

*Reprinted from ASME 2004 BPVC, Code Cases, Nuclear Components, by permission of the American Society of Mechanical Engineers.

All rights reserved.


Alternative Requests CMP-0221023 Enclosure 1

Page 1 of 12

FOOMG SUPP. l i - NC (Strtw: M P D P I b o t a : P D P ~ ( S U Q P r : O M C u e mum* CASE N-740

y p n n l D . r r k l r 1 6 s o O r

Inquiry: As an alternative to tho prov i s~o~s of Wh-4410 aud WA-6611 for rsductng 8 dtfdct ~o ul ~ s i E o i a ~ ~ t h 8 ~ 0 1 u d b C ~ C o d e a S e c d o a ~ Z a , Q ~ p s m r ~ t r i b l c m r c d u a a ~ 0 c t t o a f L w o f ~ s i x e b y ~ I h e w d 1 t h i ~ b y ~ a , o f w a M ~ y a r I b e o u t r k L . srrrPIcrr of thc piping. Wf a usocr*tsd WCM

1 GmlmAL-

(a) This Cue applies to d h i d a r metal suaccnitic wldr ~ W X I P-No. 8 or 43 and P-NIX. 1.3, IW, 128, a 12C' mamMr: crr hnv&n P-Nos. 1.3,12A. 128, ud i ~ ~ ~ ~ ~ ~ ~ i s c ~ . ~ r o ~ m ~ m a a t *Ma ~W.W- P-NO. 8 d P-Nb. 43 fnM&& uui U, warn bacwctn P-No. I) sad P-No. 43 ~ s j o i w d with m a.lawJ&k U l k a Inadd. (b) Weld o v d a y fillar moul ehall be low-carbon (Oms% mu.) urrtmltic N&lhs d a an awm&ic nicMlUoy(28&,Cr&.)clpplhd360&gPwadIha ~ o f t h e i ~ p r U d ~ r a l ~ a W ~ P m c s d u m S p a c i - f a i p m v e v d d t n l l . ~ h wcorduhoo wnh Ihc Coaltfocdon Cod. rmd Owner's R a p h n m s . p d k b o l f & d i n t b a ~ ~ . A t e n E i I ~ ~ r n ~ p c n l v e l d h u f r @ # m X l t



Page 2 of 12

nquhmanta of tba Conrmticm Code uod O w ' s ~ t t x : p m v i & m o Z A p p e n d i * i ~ k r w e d

WPueiding* w 6 I d o v c r l * l , ~ ~

t o b e ~ B b a l l b s ~ b y t b s U q u i d p o ~ c t n a t m&aL lr~rprlhrn'.i(in.(lJmm)c$anbe

the fdlowing Ycq- (11 OnsamorshysndweIdrmalM b e e m

t o ~ ~ ~ ~ i f l ~ ~ 0 b r s p d x a d w h h o r w i l i a o o l ~ ~ l l r s t h i d ; a s l s c & ~ l r y s r s ~ a o t b e ~ i o ~ w o l d ~ t d e r i p n l h i c k n m n q ~ * ~ U l c ~ * . tianpaioaw W e l d h g j i r ~ ~

(21 If cxmwtifnl of ilulhkm bdbsrdsdd in I(c) frr n g ~ t b e a n a w ~ t b e m M o ~ Q t o b o d o p w i t s 4 including my iacd mpin or initial vdd m d 8 y layer* sMIbeewninsdbydtetiguidptat.tnmtM.?hc a r u ~ d n ~ ~ i O d i G s t j D r n ~ t h r n ~ ~ i o . ( ~ ~ mm)priortothc~icMimofrbesbuctunlIr)wcsdrbt weld oPaky.

(d) Weld m r l ~ y deposits rcball mtet the following rtq-

(1) The m~Ecaitic mink staf Preld mi&-t ghaUcurrirtdatlePttwowekilryenhrviqrr-dqpaat#i ~ f a r i O b ~ b f t t l c r s t 7 5 P N . T h s h l a y a o f Wmdrlwidh&4tr&ariBc~00,~obac]rruR7.5PN a h a f l ~ O D O s t h e f i n t I . y a o f d K I ~ ~ t t f u i t m y b a ~ t c Y w r r d t h o ~ t h i ~ , ~ - tivtly,flrstkpoirtksrlltSmJ~rorosptrbkt,proW t b 4 C I P b b t l ~ d ~ ~ w c M m c c a l I r d e t a - m i d by c b m W rnalydr to kr ku ihan 0.@29ba

(2) ? h r ~ d c n i c k a t d ~ w a M ~ s h U c o n - s i s t o f a t b w s t t w o w d d h y s n r ~ R o m r A l l r ? r d d & a ( 5 . ~ a t o f . t W 2 8 % . r ) r r f i r d k y s r

r @ d w*. Alml&vtly, fef

pmvlrkdtba~ofMlayarwartvl*urtsalt icbsns msraidl,-Ward'IvsM,dtha- difutionzaashao@aeeotrsnttictwvsmrtsrlPtcoatafn at~2A9bC1,dthsCrwaOoatofIbadsporitwlwsld

l r n n y b e a s d i t C d ~ i b 8 l a q r r i r a d d t i d ; i a t l . ~ t h e p o r t i a n o f ~ ~ k y s s o v c r I b a ~ ~ u r s t e n i t i c f l U c o ~ a r c d d , d M u r o d ~ d i l r a t i o ~ m m ~ ~ d j ~ ~ ? i c ~ ~ c o n t d n a t I a a ~ 20(kCk,radbwCrccartcmtofhk;dspo*kodldmetrl BdctarniaadtryehoantcJd~oPtkproduodrrranaid a t o f a ~ ~ w o a t p o n ~ f m m r m o c l i u p p p Y c r d i o ~ ~ ~ w i t h f b t W P S f l K L b c

(cf Thin Caaa Is onky fa wdding in d i c t b d n o t t o h y b ~ t h c r m r f ~ ~ ~ o f 1 X 10'~ (ffc0.5 eV)neu~nr percm'pliatoanldiag.



Page 3 of 12

d f a r i y c c r a c k ~ , r b d l k , ~ I n t k c ~ i~.DcardraeslwithNY&3bK),lftb&wLror~tbe t r a u a d . r y o f h v o ~ t ~ e ~ o a o f & I w ~ i n b o t l t ~ h ~

( b ~ T h e d a r f g n o f I b s ~ o v c r l * y W u a t i s f y t h t f o U ~ , ~ C b s ~ r a d f i n v ~ m remicO:oo1 in w). The fdawhg dedp analysis W be ~ i n a c c a d a r r c o w i l b r w A I I 3 1 1 :

(I) T h e a x l d ~ r a d e n d ~ o f t b c w e l d w a l r r y B k a U c w a r t h c W b M B D d ~ ~ ~ ~ l ~ ~ ~ n d l l C h d d s o f h w e b d r r a d p < w i b e t c R l a r d n s d i l a i ~ M f h t ~intothcareMwaibryaodbrckfstobreitapl~out

ov;ctI*y ftrll thiclacnr kqth s*bssdr axially beyclad !be p r v ~ f l * w b y ~ ~ r ~ l t ~ . ' ? i l ~ ~ h b ~ t ~ h ~ h ~ ~ & w d t f i e i t c m a n d t b t t r t ~ w a U ~ a f rhs itam

(2) wee?^ yredinecoonlaarwifh m w , tb cad w t c e e d 4 5 d e g . A d o p c o f m t ~ ~ 19israpom- mcakxl*

(31 tffoa the Icngthafcircran- f o t s n t i o l l y M f h w R m w e k m d u n k a w t e d ~ ~ O B C w u f h ~ a q U I L f t o $ U : ~ m O f ~ f a n d l t h s a f t h e i n d l v i d u a l 5 a w s ~ i a r r r a n d r r a c c d x h WA-3300.

(4) For t5mvmf-y &ted flaws, if tBe wm- b i n a d ~ b ~ t b n 109bolthei1rem'rdrclwta- eslac,rho&rws~b8uftrmedtobe10046dmxl~tbo o r i @ n r d ~ ~ o f d w i t a : m f a t t b e ~ d r w m f a m a of the item. Far circamfsIsnei.Uy aricoted If dr:combiaadhDgdrdosrnotsxossdlO%afrhsfosao'r c i F c u m f o l a a c c . t b s t l m r W b d b o k l O W b

(3) Iioraridtkws 1JIn.(38jrnn)almpr,afor f i v e m l m x e a x U d n r n o t ~ t y ~ t b a i l r m m ~ k r r * r ~ t o b c 1 0 0 9 b t b r r a r g h t b a ~ ~ t M o k n a r o f t h , ~ f a o f l w ~ m i & ~ o f t h s & n v a e o r o - bind flaw, aa appklbk.

I6~ThcwerfaycBuipthiJ j r tuaf~m#rtSag tht r cqbmms of WX11 or ($1 .k,w rtrrrll k lruod o n t b a l a # u r r r o d ~ , u s i n p d y ~ w o M o v l o r l a y - * t # m f ~ t o O l c ~ ~ of l (d).Rse~ww~Itmwsldovarlny, a n y p ~ t b n v r h r f h e w r b M ~ a y , u d t l w . ~ ~ ~ ~ t y ~ ~ . ~ . r w t b a w d d o V a r i . y c r r r o l e f o l w r - m c H I I f a a k . a c h ~ ~ w l t B l a r ~ a f 2 . 5 ~ h ~ m c t h a t a e a o f t h a u s k l o y ~ " l r y s h a U b e e ~ h ~ t d d



Page4of 12

I o I i a u 6 9 o d n a a ~ m ~ ~ , t h a w u n i - n U i m q ~ c r l & k J u l l k m a t . N ~ c - tivs axuaiardon mth& shdl be in ward.ncs with XWA-2200, except M tpcciAcd herein. N o ~ c i v e ~ 0 n p s r w r m e l ~ k : q u r l l s a i h ~ with IWA-2%). u- nurminrtiar fmmiunso aal p c r a w a a l ~ b e 1 8 ~ w i t h ~ WI, !kctiCnl XI.

{a) LdMfbwrhilf W t b c ~ n t u r - dants of T a b IWB-3514-3 with the rddiriaDj Umitluioa U u r t t b E t O E a l ~ t l . w ~ t l b ( d l O P B o f U l b r m I d ~ a u u d ~ a D l l a G I P ~ ~ ~ ~ ( Y Z t b r ) 1wn&m flaw asl sxccai 3 in. (76 mm),

fb) lSm~mjstd(* r~*ge o f t b e ~ m



Page 5 of 12

o h J l k ! u s t u n s d u , ~ t h c ) r r p t r t ~ ~ & w ~ c o u h t ~ ~ d L I t Y O h t l B C - T h i s l r r r r m s d ~ w ahll lnsaetthaimmke of T&h; IWB-UI4-2. AUaasBay, tha d firw ibtdl be 8dk

aacdandmatbereqWam&dfWB-36rLD,W--3644 wd MID-3610, u @ b b J c . Bofb ui*l rad-- t i d p l . w t l a w ( ~ W b ~

(4) After coarpl@tian of all welding rctiuiticr, a f f W rwmtm, supparpl, lad untbbar &ail be VT-3 v i n u a t l y e ~ t o ~ d u r t d e o l g n ~ t l l ~ m a

( I ) Tbc w d u w h y o x m b t h n volume in Fig. 2 shallklddsdtoIhahpcszWplarrad

lo* npp-, (2) Tkt wefd ov&y emdadon volPms in Fig. 2

W i r h d g ~ ~ I n ~ ~ ~ u . ~31Tbetotrrvb3eexPninrtionaoosptracta~

of T&b fWB-3514-2 k; for dic weld rwsrly. AlwmUively, far Clrar 1.2, os 3 piping ryrwmr, &a aceeptancc cdterir of FA%-3600, IWC-3600, or W W , o r r p p m r b r f l k m o ~ f o r t k r w o l d w a r t r y . CIIlckrirrtkra~~U%ofditob.la~rbrllm**1t&s dcoirpl~mquSmmoDProf2.

141 Wdd mwhy a x ~ o ~ rdums tirrl sbw 00

~ o n o f n n c l c g o w t h a n e w ~ ~ r h . l f b s p l a o s d i a t o a p q m M m w b e ~ a a & a u a p k k r i a . A q u r n s s o f t h i r ~ m e h a U , b s s x u n i B e d o l y w ~ 10 ywlrn*

(5) If insexvia rcverl CrpEk gfaWtt4 ox a c w ~ m # t i n g t h t ~ ~ I k a o r o M o ~ y ~ v o l t m h e l a u l l b t r c o x r m l # d d u r l q g t h b f l r t t a s l l C Q l l i a ~ ~ ~ P O I l o r l Y i n g d l # r C r V C I Y Q f tba growth or new ~ ~ g .

16) Fa weld avarlry mmiwi~lt volmas with sum



Page 6 of 12

ocpUbfs iIu&&oru r9 tbwXMd is 3(cXZ) llrd a), dDc wold owrisy shall be tamowcd inolDdtag tbo oripinrl ~ v e t w e k f u r l t b c i t a r n ~ b a w r r a c g d b y l r s p d d lepbawmt activity in rceadrrvx with fWA-4000.

(d) MditionrJ-.If-- m w r i u r ~ i n l t u t i o a . c n d t p o w t b l a t o t h t weld ovsdry dadp thictntss, or axial mdt growth bcyoadtbe~-mlwddidoltllweld

A ~ y m m t o l r r W b s p w P o m K d i n - with IWA-X)(]O.

Use of this Caac shall bc documcnlsd on Pam NIS-2.

MANDATORY APPENDIX I AMBIIENTwTEWEILAT1URE TEMPER BEAD WI.CI,I)WG

fa) T t x i s ~ x r p p i k r s l o ~ f r r u r d c a i r i C f i l l c r mtd WddB twwwn P-Noe. 1, 3, 1 U 1%. and 1 2 ~ ' ~ a a d t b a l r u D o c i r t e d ~ d w s M c ~ P - No. 8 a 43 matmi& to P-EUar. 1,3,12A, la, and 12C' nweliah .with tha faUawia8 WML Thii AppaDdix s h s U ~ 0 1 b a U 4 # f t o F c g u k S 1 1 - 3 [ 1 2 ~ B ~ d e o s t h e ~ b r s b m n ~ a i n c l u d c ~ 0 . 4 % t o 1.0% &kcI, qmhiog, t m q w h ~ , aab rpp1Wm of r finc prrjn prnuh.

fb) T h e m a r i m u m u r r o Z a n M ~ ~ W ~ b r s a t o n t h a ~ r u r f r w r o w p r t & . f e n i ~ c ~ r m r t e r i . l s w be Jo ta? (325 000 ram2).

Ic) R a p d d r e p M rtivitla on B d i t i a h k - w w~tldinaccadarrorwidrthirAppoadixamfinrilsdtotlme a l ~ ~ g t f i c A u i O n t i n e o f a ~ w e M t o ~ b ~ o n w h i d r ~ i n . ( 3 m m ) w k s r r o f ~ ~ dDpoit wise above rbt orfgiorl hxion tine.



Page7of 12

fd) E f a d e f o c t p c a a ~ i n t o t b t c f e n i t i c b u s t ~ m h g a ~ c ~ t w Q inncconlraeswirlldrisw

d i % , p m v i d # l ~ b c g r k o f ~ i n d u , b * r e ~ Q a s not d % in. (10 ma).

feJ Prfor to wddiqp, 8 r ~ r b : a m O f a t ~ l n E u o r S i n . ( l 3 0 m a r X w ~ w u k u c , l b d i b e a t l e u t 50°F (10.0

V ) W ~ W W r n r w t t l P s O w n a c ' u R a q u l r o men@ a n d t b c C o o ~ C o d a uad C%es rpasifitd in tbe RepktRBp- Plur. Wetdine mamW ahdl k m k d r o t h e t t h a y l a i d c n r i & d p r ~ l e u n t i l W M ~ .

(81 PaningmaybtwebqoarbeIniWaad8nal k7a*

mkfbeattrtu#itouktbbhurdoampbawture~m w a ? r a p p l i r a t h a ~ k r l r r g ~

(b) b)~herocvtMdmd~urOIoofthecaviryh t l u : ~ a t M m M y h r l l b r : ~ , g n r t a b t f i c ~ m spwiscd fa wrqmk,

(4 Tbc - tnnparrawrbforUMt ~laycnobthcrrmrt rhdl bc 1 m (%*C).

( d ) ' Z h e ~ ~ y ~ ~ * d o p t h ~ b t r t l a r o l 1 i a . ( 2 5 ~ 4 T h e ~ d y shrllbeatkui t w i a c d t * ~ ~ y c a v i t y ~ . m E a r l t u a n b q r ~ l b a ~ ~ $ h m p r m d t m ~ i w r l o i t b a ~ mt speciment, The tsn t h c c a v i l y ~ b a al baa6 in, [I50 k g n s p r r s d f n i ~ c c ~ w i t f i P i g . E f .

(c) =tirbrrodhhwwMon mtMlawttbamc~lt-ofhConrPue- tionCabadOi*aa"rRsq ' ' .If$uchq- l l r s a o c i a t h t C h u m a i m C o d e B a d ~ r ~ r m c s , t b b ~ ~ M k d c a c n n L a e d b y ~ V - r o l c b E m p r e t b a s U b f t f i c ~ ~ b . l e materi*latabslowtbala;vrttvsmics of tbs itMltobC~.ThbloeatimPnd dtb t u t ~ ~ l k d m l l a r t o ~ n q u i r r d i n p a n . 2.1(f) but shafl be in the bsse ma.

rn-v-natcbtr##rcrftbcf~ltitic-ccted z o n s ( w A z ~ a h . L 1 b n ~ 8 t ~ ~ ~ nr tbs buw metal rest of 2.t(c). Nunabs, locrtiaa, aud ~ e a t P t i o a c r f W r p t c l m n n r r r h r U b s r a f ~ ~



Page 8 of 12

( I ) T b c ~ r b P S I b a t s m o r c d f i m m a l o C r i ~ a 1ls119unpmtkItordcptbofrmbhtftba of t&Gdepia?d~auul. Ibe~~~lpoatk*HAZimpd ~ ~ k : m k I ? ~ t r r u v r n o t ~ t b c u i t ~ t b t ~ andeQ-hed tode f lwc~WAZ~wtd to f r tG tumlpy Y-notch Wkn;tt iy @ to

m u c B H A Z p r ~ ~ i o b K : ~ g ~ . W h e o t h e m a t a i r l l h i c h i u r ~ ~ t b e r x i r o f a ~ r h o n k , incWtoallowtberaotdtbtndcbtobcdipdplmlkl to thc f d o n lioe.

~2)KIfdreststmatraia]innihbFcwmofapfPtcrw forging. rhe axis of t&: =Id autt lm dented paraftel to h priaelp.l direction of rdtmg or forging.

(3) Tbc Chrtpy V*notcb tssl sbrff lm pafamsd L3 a c d SA-370. Spschw~s MI be in accwdnnce with SA-370, Fig. f 1. Type A. Tht ten shalt ems& of a S G t o f ~ f U & r l z e 1 0 m m x 10mmyacimarur.Tha 1- sxpmrion, pmmt e b r , rbaarb4d wfgy, tl?at WI- ~ , ~ ~ r a d l o c r t i o n o f * i l l a a ~ 6 h 4 U b t ~ i a t h o F r o c a Q t m ~ R c r a n i ,

l g ) The a m lrtarl mynrnrioa vsfw of the t h e

chLa~bcpwns0 llswoftbs~urrrf- vor,ifbtcwvcnlpt1.(.

era1 expanrion vnlue of the HAZ Charpy V-notch

( 1 ) Thcweldiagpocedtn:rh.Ukq- ( 2 ) An Adjwmmf TamptMuns far ths proeadure

qurlifiudaarbank-in(rCC#blBCC;Widlblt ~ ~ e f i ~ l ~ o ~~OYSOW of ~8-433s.2 woe m, Edition with b 2002 AddeDdk Ths RTm w low senrictcmpcmf~n 0fthemraaidsfot~rdrspnMlnd p ~ w i f t ~ ~ s t u l l k ! bya squldalent to dut of tha MJ-t Teqmwu.

The weiding procedure shdl include the foflowing lwphmllt5:

{a) T h s w t k l m a s ] ~ k . d s p o s i t e d b y t h c ~ c a arrchlns DTAW poc#u.

Ib) Dilrimil.r meal waw w be mdd yalag A-No. 8 weld metal (QW442) far P-No. 8 w P-No. 1.3, or 12 (A, I%, or C) weld jointr or F-No. 43 weld rmJd (QW- 432) fa P-No. 8 or 43 to P-No, i, 3. w 12 (A, B, nr C) wrM jdm.

fc) Thsatuambswaldsdshdlbebu~arlthadapwit afarlu~tthreelayem t o ~ ~ n . a t ~ & in. (3mm) ~ y r h L c k a M s \ 9 2 f h ~ ~ i n p t t f b r o a c t , b y r t a ? n -



Page 9 of 12



Page 11 of 12

€xadmh~rMI.C-O NOTE: (1) ~ w u ~ f f c l ~ ~ ~ m r , ~ w r a t i . l . x t . n ( o f ~ h . l r v ~ o n v o l u r u ~ r l l . x t m d * * . p t ~ ~ n . t ~ ~ m m l b y # d ( h r ~ f l w

arid at hut ?( in. fxJ mml bnwl thr 101 o( tb hror(glnl mkl, tncluding rmd ad iwtw?, w n Wl*L R6.2 P m m M m m I W a # I M a ~ ~

Gal



Page 12 of 1 2

I GENERAL MOTE: BYK mial Chrpy Imp& t@whn w npt #mum. Tldt figwr tB&&m r ~~~ mld.

BGI.3 QuKmmmmWATE

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