ML042180182

Proposed Relief Request No. 3RR-12 to the Third 10-year Inservice Inspection Program

ML042180182
Person / Time
Site:	Susquehanna
Issue date:	07/26/2004
From:	Shriver B Susquehanna
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML042180182 (23)

Text

Bryce L Shriver PPL Susquehanna, LLC I I '

Senior Vice President and 769 Salem Boulevard '. I'

• Chief Nuclear Officer Berwick, PA 18603 Tel. 570.542.3120 Fax 570.542.1504 blshriver@pplweb.com l -

JUL 2 6 2004 TM U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station OP 1-17 Washington DC 20555 SUSQUEHANNA STEAM ELECTRIC STATION PROPOSED RELIEF REQUEST NO. 3RR-12 TO THE THIRD 10-YEAR INSERVICE INSPECTION PROGRAM FOR SUSQUEHANNA SES UNITS 1 AND 2 Docket No. 50-387 PLA-5781 and No. 50-388

Reference:

PLA-5741, B. L. Shriver (PPL) to USARC, "ProposedReliefRequest No. RR-30 to the Second JO-Year Inservice Inspection Programfor SusquehannaSES Unit 1,"

dated March 26, 2004.

This letter requests NRC approval of PPL Susquehanna, LLC (PPL) Relief Request No. 3RR-12, in support of the Third 10-Year Inservice Inspection Interval. This relief is necessary to support the inservice inspections on Susquehanna SES Unit I and Unit 2 during the Third 10-Year Inservice Inspection Interval.

This request is submitted in accordance with 10 CFR 50.55a(a)(3)(i) and applies to the program required by 10 CFR 50.55a(g)(6)(ii)(C) to implement Supplement 11 to Appendix VIII of Section XI of the ASME Code (Supplement 11).

Relief is requested to use an alternative program for implementation of Supplement 11 requirements, as presented in Attachment 1, Relief Request No. 3RR-12. The alternative program will be implemented through the Performance Demonstration Initiative (PDI) program.

The industry has implemented a PDI program and has developed an alternative program to implement Supplement 1. The alternative program was generated from a PDI model prepared by the Electric Power Research Institute (EPRI). Attachment 2 provides a comparison of Supplement 11 and Code Case N-653 requirements, and the proposed alternative to Supplement 11 requirements.

The alternative program has been approved for several plants. (Quad Cities TAC Nos. MB 3767 and MB 3768; Hatch TAC Nos. MB 3875 and MB 3876; Brunswick TAC Nos. MB 5631 and MB 5632; Fitzpatrick TAC No. MB 5037; Nine Mile Unit 2

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Document Control Desk PLA-5781 TAC No. MB 5372; Pilgrim TAC No. MC 0961. The alternate program has also been verbally approved for use at PPL Susquehanna Unit 1 pursuant to the request made in Reference 1 for the Second 10-Year Inservice Inspection Interval.

The proposed alternative program follows the scope of Supplement 11, with the enhancements, clarifications, and refinements as approved by the ASME Code NDE Subcommittee and provides an acceptable level of quality and safety as required by 10 CFR 50.55a(a)(3)(i). Approval of this relief request is necessary for Susquehanna SES Units 1 and 2 to comply with 10 CFR 50.55a(g)(6)(ii)(C) and approval is requested by January 1, 2005.

There are no new commitments made in this letter. If you have any questions, please contact Mr. C. T. Coddington at (610) 774-4019.

Sincerely, L. hriver Attachments: Attachment 1 - Relief Request No.. 3RR-12 for Units 1 and 2 Attachment 2 - Comparison of Supplement 11, ASME Code Case N-653, and Alternative Program copy: NRC Region I Mr. A. J. Blamey, NRC Sr. Resident Inspector Mr. R. V. Guzman, NRC Project Manager Mr. R. Janati, DEP/BRP

ATTACHMENT 1 to PLA-5781 RELIEF REQUEST NO. 3RR-12 FOR UNITS 1 AND 2

Attachment 1 to PLA-578 1 Page 1 of 3 PPL SUSQUEHANNA, LLC SUSQUEHANNA SES UNITS 1 AND 2 THIRD 10-YEAR INTERVALURELIEF REQUEST NO. 3RR-12 SYSTEM/COMPONENT(S) FOR WHICH RELIEF IS REQUESTED Class 1, Pressure Retaining Welds in Piping, subject to Appendix VIII, Supplement 11, examination.

CODE REQUIREMENTS The Code requirements for which relief is requested are all contained within Appendix VIII, Supplement 11. For example, paragraph 1.1(d)(1), requires that all base metal flaws be cracks. Paragraph 1.1(e)(1) requires that at least 20% but less than 40% of the flaws shall be oriented within +20 degrees of the pipe axial direction.

Paragraph 1.1(e)(1) also requires that the rules of IWA-3300 shall be used to determine whether closely spaced flaws should be treated as single or multiple flaws.

Paragraph 1.I(e)(2)(a)(1) requires that a base grading unit shall include at least 3 inches of the length of the overlaid weld. Paragraph 1.1 (e)(2)(b)(1) requires that an overlay grading unit shall 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. Paragraph 3.2(b) requires that 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.

RELIEF REQUESTED Pursuant to 10 CFR 50.55a(a)(3)(i) relief is requested to use the enclosed Performance Demonstration Initiative (PDI) Program for implementation of Appendix VIII, Supplement 11 requirements.

BASIS FOR RELIEF Paragraph 1.1(d)(1), requires that all base metal flaws be cracks. As illustrated below, 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 semielliptical with a tip width of

Attachment 1 to PLA-5781 Page 2 of 3 less than or equal to 0.002 inches, and at least 70 percent of the flaws in the detection and sizing test shall be cracks and the remainder shall be alternative flaws.

IExcaation S Mechanical fatigue crack I Iin area Base material Relief is requested to allow closer spacing of flaws provided they don't interfere with detection or discrimination. The existing specimens used to date for qualification to the Tri-party (NRC/BWROG/EPRI) agreement have a flaw population density greater than allowed by the current Code requirements. These samples have been used successfully for all previous qualifications under the Tri-party agreement program. To facilitate their use and provide continuity from the Tri-party agreement program to Supplement 11, the PDI Program has merged the Tri-party test specimens into their weld overlay program.

For example: the requirement for using IWA-3300 for proximity flaw evaluation in paragraph 1. I(e)(1) wxas excluded, instead indications will be sized based on their individual merits; paragraph 1.1(d)(1) includes the statement that intentional overlay fabrication flaws shall not interfere with ultrasonic detection or characterization of-the base metal flaws; paragraph 1.1(e)(2)(a)(1) was modified to require that a base metal grading unit include at least 1 inch of the length of the overlaid weld, rather than 3 inches; paragraph 1.1 (e)(2)(a)(3) was 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 1 inch requirement of Supplement 11; paragraph 1.1(e)(2)(b)(1) was modified to define an overlay fabrication grading unit as including the overlay material and the base metal-to-overlay interface for a length of at least 1 inch, rather than the 6 square inches requirement of Supplement 11; and paragraph 1.1 (e)(2)(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 inch at both ends, rather than around its entire perimeter.

Additionally, the requirement for axially oriented overlay fabrication flaws in paragraph 1.1(e)(1) was excluded from the PDI Program as an improbable scenario.

Weld overlays are typically applied using automated gas tungsten arc welding techniques with the filler metal being 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 PDI Program revised paragraph 2.0, allowing the overlay fabrication and base metal flaw tests to be performed separately. The requirement in paragraph 3.2(b) 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

Attachment 1 to PLA-5781 Page 3 of 3 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.

These changes are contained in Code Case N-653. A comparison between the 1995 Edition and 1996 Addenda of Supplement 11, Code Case N-653, and the PDI Program is enclosed as supporting documentation. The first column identifies the Code requirements, while the second (middle) column identifies the changes made by the Code Case.

There are however some additional changes that were inadvertently omitted from the Code Case. The most important change is paragraph 1.1 (e)(2)(a)(1) where 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. Additionally, to avoid confusion, the overlay thickness tolerance contained in the last sentence of paragraph 1.1(b), was reworded and the phrase "and the remaindershall,be alternative flawvs" was added to the next to last sentence in paragraph 1.I(d)(1). Additional editorial changes were made to the PDI program to address an earlier RAI. The above changes are identified by bold print in the third column of the enclosure.

ALTERNATIVE EXAMINATION In lieu of the requirements of ASME Section XI, 1995 Edition, 1996 Addenda, Appendix VIII, Supplement 1 1, the PDI Program shall be used.

IMPLEMENTATION SCHEDULE Approval of the alternative is requested for use during the Third 10-Year Inservice Inspection program or until Code Case N-653 is included in Regulatory Guide 1.147.

ATTACHMENT 2 to PLA-5781 COMPARISON OF SUPPLEMENT 11, ASME CODE CASE N-653, AND ALTERNATIVE PROGRAM

Attachment 2 to PLA-578 1 Page 1 of 16 SUPPLEMENT 11- QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT Provided forn ative ts AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements 1.0 SPECIMEN REQUIREMENTS Qualification test specimens shall meet the No Change No Change requirements listed herein, unless a set of specimens is designed to accommodate specific limitations stated in the scope of the examination procedure (e.g., pipe size, weld joint configuration, access limitations). The same specimens may be used to demonstrate both detection and sizing qualification.

1.1 General. The specimen set shall conform No Change No Change to the following requirements.

(a) Specimens shall have sufficient volume to No Change No Change minimize spurious reflections that may interfere with the interpretation process.

Attachment 2 to PLA-5781 Page 2 of 16 SUPPLEMENT 11- QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS ______________

(b) The specimen set shall consist of at least No Change (b) The specimen set shall consist of at least three specimens having different nominal three specimens having different nominal pipe diameters and overlay thicknesses. pipe diameters and overlay thicknesses.

They shall include the minimum and They shall include the minimum and maximum nominal pipe diameters for maximum nominal pipe diameters for which the examination procedure is which the examination procedure is applicable. Pipe diameters within a range applicable. Pipe diameters within a range of 0.9 to 1.5 times a nominal diameter shall of 0.9 to 1.5 times a nominal diameter shall be considered equivalent. If the procedure be considered equivalent. If the procedure is applicable to pipe diameters of 24 inches is applicable to pipe diameters of 24 inches or larger, the specimen set must include at or larger, the specimen set must include at least one specimen 24 inches or larger but least one specimen 24 inches or larger but need not include the maximum diameter. need not include the maximum diameter.

The specimen set must include at least one specimen with overlay thickness within - The specimen set shall include specimens 0.1 inch to +0.25 inch of the maximum with overlays not thicker than 0.1 inch nominal overlay thickness for which the more than the minimum thickness, nor procedure is applicable. thinner than 0.25 inch of the maximum nominal overlay thickness for which the examination procedure is applicable.

(c) The surface condition of at least two No Change No Change specimens shall approximate the roughest surface condition for which the examination procedure is applicable.

Attachment 2 to PLA-578 1 Page 3 of 16 SUPPLEMENT 11-QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT Ony Pposed Rerements AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements (cl)Flawv Conditions (I) Base nietalflams. All flaws must be cracks (1) Base metal flaws. All flaws must be in or (1) Base metal flaws. All flaws must be in or in or near the butt weld heat-affected zone, near the butt weld heat-affected zone, open near the butt weld heat-affected zone, open open to the inside surface, and extending at to the inside surface, and extending at least to the inside surface, and extending at least least 75% through the base metal wall. 75% through the base metal wall. 75% through the base metal wall.

Flaws may extend 100% through the base Intentional overlay fabrication flaws Intentional overlay fabrication flaws shall metal and into the overlay material; in this shall not interfere with ultrasonic detection not interfere with ultrasonic detection or case, intentional overlay fabrication flaws or characterization of the cracking. characterization of the base metal flaws.

shall not interfere with ultrasonic detection Specimens containing IGSCC shall be Specimens containing IGSCC shall be used; or characterization of the cracking. used when available. when available. At least 70 percent of the Specimens containing IGSCC shall be used flaws in the detection and sizing tests shall when available. (a) At least 70 percent of the flaws in the be cracks and the remainder shall be detection and sizing tests shall be cracks. alternative flaws. Alternative flaw Alternative flaw mechanisms, if used, shall mechanisms, if used, shall provide crack-provide cmck-like reflective characteristics like reflective characteristics and shall be and shall be limited by the following: limited by the following:

(1) Flaws shall be limited to when implantation (a) The use of Alternative flaws shall be of cracks precludes obtaining a realistic limited to when the implantation of cracks ultrasonic response. produces spurious reflectors that are uncharacteristic of actual flaws.

(2) Flaws shall be semielliptical with a tip width of less than or equal to 0.002 inches. (b) Flaws shall be semielliptical with a tip

. .width of less than or equal to 0.002 inches.

Attachment 2 to PLA-5781 Page 4 of 16 SUPPLEMENT 11 - QUALIFICATION CODE CASE N-653 PDT PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS (Provided fonfraionl)_______1Reureet (2) Overlayfabricationflaws. At least 40% of No Change No Change the flaws shall be non-crack fabrication flaws (e.g., sidewall lack of fusion or laminar lack of bond) in the overlay or the pipe-to-overlay interface. At least 20% of the flaws shall be cracks. The balance of the flaws shall be of either type.

(e) Detection Specimens (I) At least 20% but less than 40% of the flaws (1) At least 20% but less than 40% of the base (1) At least 20% but less than 40% of the ,~

shall be oriented within +20 degrees of the metal flaws shall be oriented within base metal flaws shall be oriented within  ;

pipe axial direction. The remainder shall +20 degrees of the pipe axial direction. +20 degrees of the pipe axial direction. .,

be oriented circumferentially. Flaws shall The remainder shall be oriented The remainder shall be oriented not be open to any surface to which the circumferentially. Flaws shall not be open circumferentially. Flaws shall not be open candidate has physical or visual access. to any surface to which the candidate has to any surface to which the candidate has The rules of IWA-3300 shall be used to physical or visual access. physical or visual access.

determine whether closely spaced flaws should be treated as single or multiple flaws.

(2) Specimens shall be divided into base and (2) Specimens shall be divided into base metal (2) Specimens shall be divided into base metal over-lay grading units. Each specimen and overlay fabrication grading units. Each and overlay fabrication grading units. Each shall contain one or both types of grading specimen shall contain one or both types of specimen shall contain one or both types of units. grading units. Flaws shall not interfere grading units. Flaws shall not interfere with ultrasonic detection or with ultrasonic detection or characterization characterization of other flaws. of other flaws.

Attachment 2 to PLA-578 1 Page 5 of 16 SUPPLEMENT 11- QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposcd Alternative to STRUCTURAL OVERLAID WROUGHT Ony Suppe et Reremts AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements (a)(J) A base grading unit shall include at least (a(lJ) A base metal grading unit shall include (a)(1J A base metal grading unit includes the 3 inches of the length of the overlaid at least I inch of the length of the overlay material and the outer 25% of weld. The base grading unit includes overlaid weld. The base metal grading the original overlaid weld. The base the outer 25% of the overlaid weld and unit includes the outer 25% of the metal grading unit shall extend base metal on both sides. The base overlaid weld and base metal on both circumferentially for at least 1 inch-grading unit shall not include the inner sides. The base metal grading unit shall and shall start at the weld centerline 75% of the overlaid weld and base not include the inner 75% of the and be wide enough in the axial metal overlay material, or base metal-to- overlaid weld and base metal overlay direction to encompass one half of the overlay interface. material, or base metal-to-overlay original weld crown and a minimum interface. of 0.50 inch of the adjacent base material.

(a)(2) When base metal cracking penetrates (a)(2) When base metal cracking penetrates (a)(2) When base metal flaws penetrate into into the overlay material, the base into the overlay material, the base metal the overlay material, the base metal grading unit shall include the overlay grading unit shall not be used as part of grading unit shall not be used as part of metal within 1 inch of the crack any overlay fabrication grading unit. any overlay fabrication grading unit.

location. This portion of the overlay material shall not be used as part of any overlay grading unit.

Attachment 2 to PLA-578 1 Page 6 of 16 SUPPLEMENT 11 - QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS (Provided fonfraionl)Sppeen_1___ret (a)(3) When a base grading unit is designed to (a)(3) Sufficient unflawed overlaid weld and (a)(3) Sufficient unflawed overlaid weld and be unflawed, at least I inch of unflawed base metal shall exist on all sides of the base metal shall exist on all sides of the overlaid weld and base metal shall exist grading unit to preclude interfering grading unit to preclude interfering on either side of the base grading unit. reflections from adjacent flaws. reflections from adjacent flaws.

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 include (b)(1) An overlay fabrication grading unit shall (b)(1) An overlay fabrication grading unit shall the overlay material and the base metal- include the overlay material and the base include the overlay material and the base to-overlay interface of at least 6 square metal-to-overlay interface for a length of metal-to-overlay interface for a length of inches. The overlay grading unit shall at least I inch. at least I inch.

be rectangular, with minimum dimensions of 2 inches.

Attachment 2 to PLA-578 1 Page 7 of 16 SUPPLEMENT 11 - QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL CD AEN63PIPORM STREQTUIRA VEMNFORFULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS ______________

(b)(2) An overlay grading unit designed to be (b)(2) Overlay fabrication grading units (b)(2) Overlay fabrication grading units unflawed shall be surrounded by designed to be unflawed shall be designed to be unflawed shall be unflawed overlay material and unflawed separated by unflawed overlay material separated by unflawed overlay material base metal-to-overlay interface for at and unflawed base metal-to-overlay and unflawed base metal-to-overlay least I inch around its entire perimeter. interface for at Icast 1 inch at both ends. interface for at least I inch at both ends.

The specific area used in one overlay Sufficient unflawed overlaid weld and Sufficient unflawed overlaid weld and:-

grading unit shall not be used in another base metal shall exist on both sides of base metal shall exist on both sides of overlay grading unit. Overlay grading the overlay fabrication grading unit to the overlay fabrication grading unit to units need not be spaced uniformly preclude interfering reflections from preclude interfering reflections from about the specimen. adjacent flaws. The specific area used adjacent flaws. The specific area used in in one overlay fabrication grading unit one overlay fabrication grading unit shall not be used in another overlay shall not be used in another overlay fabrication grading unit. Overlay fabrication grading unit. Overlay fabrication grading units need not be fabrication grading units need not be spaced uniformly about the specimen. spaced uniformly about the specimen.

Attachment 2 to PLA-578 1 Page 8 of 16 SUPPLEMENT 11- QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT Thepple en Rere nts AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements (b)(3) Detection sets shall be selected from (b)(3) Detection sets shall be selected from (b)(3) Detection sets shall be selected from Table VIII-S2-1. The minimum Table VIII-S2-1. The minimum Table VIII-S2-1. The minimum detection sample set is five flawed base detection sample set is five flawed base detection sample set is five flawed base grading units, ten unflawed base grading metal grading units, ten unflawed base metal grading units, ten unflawed base units, five flawed overlay grading units, metal grading units, five flawed overlay metal grading units, five flawed overlay and ten unflawed overlay grading units. fabrication grading units, and ten fabrication grading units, and ten For each type of grading unit, the set unflawed overlay fabrication grading unflawed overlay fabrication grading shall contain at least hvice as many units. For each type of grading unit, the units. For each type of grading unit, unflawed as flawed grading units. set shall contain at least tvice as many the set shall contain at least twice as unflawed as flawed grading units. For many unflawed as flawed grading units.

initial procedure qualification, detection For initial procedure qualification, sets shall include the equivalent of three detection sets shall include the personnel qualification sets. To qualify equivalent of three personnel new values of essential variables, at qualification sets. To qualify new least one personnel qualification set is values of essential variables, at least required. one personnel qualification set is required.

Attachment 2 to PLA-5781 Page 9 of 16 SUPPLEMENT 11- QUALIFICATION CODE CASE N-653 PDT PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements GO Sizing Specimen (1) The minimum number of flaws shall be (1) The minimum number of flaws shall be ten. (1) The minimum number of flaws shall be ten. At least 30% of the flaws shall be At least 30% of the flaws shall be overlay ten. At least 30% of the flaws shall be overlay fabrication flaws. At least 40% of fabrication flaws. At least 40% of the overlay fabrication flaws. At least 40% of the flaws shall be cracks open to the inside flaws shall be cracks open to the inside the flaws shall be open to the inside surface. surface. For initial procedure qualification, surface. Sizing sets shall contain a sizing sets shall include the equivalent of distribution of flav dimensions to assess three personnel qualification sets. To sizing capabilities. For initial procedure qualify new values of essential variables, at qualification, sizing sets shall include the least one personnel qualification set is equivalent of three personnel qualification required. sets. To qualify new values of essential variables, at least one personnel qualification set is required.

(2) At least 20% but less than 40% of the flaws No Change No Change shall be oriented axially. The remainder shall be oriented circumferentially. Flaws shall not be open to any surface to which the candidate has physical or visual access.

(3) Base metal cracking used for length sizing No Change (3) Base metal flaws used for length sizing demonstrations shall be oriented demonstrations shall be oriented circumferentially. circumferentially.

Attachment 2 to PLA-578 1 Page 10 of 16 SUPPLEMENT 11 - QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS (rvddfror__nnySupe nt1Rqiem t (4) Depth sizing specimen sets shall include at No Change (4) Depth sizing specimen sets shall include at least two distinct locations where cracking least two distinct locations where a base in the base metal extends into the overlay metal flaw extends into the overlay material by at least 0.1 inch in the through- material by at least 0.1 inch in the through-wall direction. wall direction.

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

Attachment 2 to PLA-5781 Page 11 of 16 SUPPLEMENT 11 - QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT Thepple en Rere nts AUSTENITIC PIPING WELDS (Provied for Information Only) Supplement 11 Requirements 2.1 Detection Test.

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

2.2 Length Sizing Test (a) The length sizing test may be conducted No Change No Change separately or in conjunction with the detection test.

(b) When the length sizing test is conducted in No Change No Change conjunction with the detection test and the detected flaws do not satisfy the requirements of 1.1(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 length of the flaw in each region.

Attachment 2 to PLA-578 1 Page 12 of 16 SUPPLEMENT 11 - QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT Thepple en Retcre nts AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements (c) For a separate length sizing test, the No Change No Change regions of each specimen containing a flaw to be sized shall be identified to the candidate. The candidate shall determnine the length of the flaw in each region.

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

2.3 Depth Sizing Test.

For the depth sizing test, 80% of the flaws shall The candidate shall determine the depth of the (a) The depth sizing test may be conducted be sized at a specific location on the surface of flaw in each region. separately or in conjunction with the the specimen identified to the candidate. For detection test.

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.

Attachment 2 to PLA-578 1 Page 13 of 16 REQUIREMENTS FOR FULL CODE CASE N-653 PDI PROGRAM:

STRUCTURAL OVERLAID WROUGHT The Proposed Alternative to AUSTENITIC PIPING WELDS (Provided for Information Only) Supplement 11 Requirements (b) When the depth sizing test is conducted in conjunction with the detection test and the detected flaws do not satisfy the requirements of 1.1(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.

Attachment 2 to PLA-578 1 Page 14 of 16 SUPPLEMENT 11-QUALIFICATION CODE CASE N-653 PDI PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS ______________

3.0 ACCEPTANCE CRITERIA 3.1 Detection Acceptance Criteria.

Examination procedures, equipment, and Examination procedures are qualified for a) Examination procedures are qualified for personnel are qualified for detection when the detection when all flaws within the scope of the detection when; results of the performance demonstration procedure are detected and the results of the satisfy the acceptance criteria of Table performance demonstration satisfy the Vill-S2-1 for both detection and false calls. acceptance criteria of Table VITI-52-1 for false The criteria shall be satisfied separately by the calls. Examination equipment and personnel demonstration results for base grading units are qualified for detection when the results of and for overlay grading units. the performance demonstration satisfy the acceptance criteria of Table VIII-S2-1 for both detection and false calls. The criteria shall be satisfied separately by the demonstration results for base metal grading units and for overlay fabrication grading units.

I) All flaws within the scope of the procedure are detected and the results of the performance demonstration satisfy the acceptance criteria of Table VlIl-S2-1 for false calls.

(a) At least one successful personnel demonstration has been performed meeting the acceptance criteria defined in (b).

Attachment 2 to PLA-5781 Page 15 of 16 SUPPLEMENT 11-QUALIFICATION CODE CASE N-653 PDT PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided forTInformation Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS (rvddfrIfrainOy_____t1Reuem t (b) Examination equipment and personnel are qualified for detection when the results of the performance demonstration satisfy the acceptance criteria of Table V111-S2-1 for both detection and false calls.

(c) The criteria in (a), (b) shall be satisfied separately by the demonstration results for base metal grading units and for overlay fabrication grading units.

3.2 Sizing Acceptance Criteria.

Examination procedures, equipment, and No Change No Change personnel are qualified for sizing when the results of the performance demonstration satisfy the following criteria.

(a) The RMS error of the flaw length No Change (a) The RMS error of the flaw length measurements, as compared to the true measurements, as compared to the true flaw lengths, is less than or equal to flaw lengths, is less than or equal to 0.75 inch. The length of base metal 0.75 inch. The length of base metal flaws cracking is measured at the 75% through- is measured at the 75% through-base-base-metal position. metal position.

Attachment 2 to PLA-578 1 Page 16 of 16 SUPPLEMENT 11- QUALIFICATION CODE CASE N-653 PDT PROGRAM:

REQUIREMENTS FOR FULL The Proposed Alternative to STRUCTURAL OVERLAID WROUGHT (Provided for Information Only) Supplement 11 Requirements AUSTENITIC PIPING WELDS __ _ __ fonorainOny_________euieet (b) All extensions of base metal cracking into This requirement is omitted. This requirement is omitted.

the overlay material by at least 0.1 inch are reported as being intrusions into the overlay material.

(c) The RMS error of the flaw depth (b) The RMS error of the flaw depth (b) The RMS error of the flaw depth measurements, as compared to the true measurements, as compared to the true measurements, as compared to the true flaw depths, is less than or equal to flaw depths, is less than or equal to flaw depths, is less than or equal'to 0.125 inch. 0.125 inch. 0.125 inch.