L-2013-044, Inservice Inspection Plan, Fourth Ten-Year Interval Unit 1 Relief Request No. 5, Revision 0
| ML13046A101 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 02/04/2013 |
| From: | Katzman E Florida Power & Light Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-2013-044 | |
| Download: ML13046A101 (63) | |
Text
February 4,2013 FPL. L-2013-044 10 CFR 50.4 10 CFR 50.55a U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Re: St. Lucie Unit 1 Docket No. 50-335 Inservice Inspection Plan Fourth Ten-Year Interval Unit 1 Relief Request No. 5, Revision 0 Pursuant to 10 CFR 50.55a(a)(3)(ii), Florida Power & Light (FPL) requests relief from the IOCFR50.55a(g)(6)(ii)(F)(4) exception to ASME Code Case N-770-1 that essentially 100%
coverage be achieved for the baseline required volumetric examinations. The details and justification for this request are provided in the attachment to this letter.
FPL requests approval of this relief request to support the upcoming Unit 1 SL1-25 Fall 2013 refueling outage.
Please contact Ken Frehafer at (772) 467-7748 if there are any questions about this submittal.
Sincerely, g
Eric S. Katzman Licensing Manager St. Lucie Plant Attachment ESK/KWF V41 Florida Power & Ught Company 6501 S. Ocean Drive, Jensen Beach, FL 34957
L-2013-044 Attachment 1 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 PSL Relief Request In Accordance with 10 CFR50.55a(a)(3)(ii)
--Hardship or Unusual Difficulty without Compensating Increase in Level of Quality ori Safety--
- 11. ASME Code Component(s) Affected Class 1 pressure retaining dissimilar metal piping welds containing Alloy 82/182.
American Society of Mechanical Engineers (ASME) Code Case N-770-1, Table 1, Examination Categories, Inspection Item B - Unmitigated butt weld at cold leg operating temperature.
- 2. Applicable Code Edition and Addenda The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Rules for Inservice Inspection of Nuclear Power Plant Components, Section Xl, 2001 Edition with Addenda through 2003 [1] as amended by 10CFR50.55a,[21 is the code of record for the St. Lucie Unit 1, 4thl 0-year interval.
10CFR50.55a(g)(6)(ii)(F)(1), effective date August 22, 2011, requires "licensees of existing, operating pressurized water reactors as of July 21, 2011, shall implement the requirements of ASME Code Case N-770-1, subject to the conditions specified in paragraphs (g)(6)(ii)(F)(2) through (g)(6)(ii)(F)(10) of this section, by the first refueling outage after August 22, 2011."
Additionally, 10CFR50.55a(g)(6)(ii)(F)(3) states that the baseline examinations for welds in Code Case N-770-1, Table 1, Inspection Item B, "shallbe completed by the end of the next refueling outage after January 20, 2012. Previous examinations of these welds can be credited for baseline examinations if they were performed within the re-inspection period for the weld item in Table 1 using Section X1, Appendix VIII requirementsand met the Code required examination volume of essentially 100 percent. Other previous examinations that do not meet these requirements can be used to meet the baseline examination requirement,provided NRC approval of alternative inspection requirements in accordance with paragraphs(a)(3)(i) or (a)(3)(ii) of this section is granted prior to the end of the next refueling outage after January20, 2012."
1 11 1 L-2013-044 Attachment 2 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
- 3. Applicable Code Requirement ASME Code Case N-770-1 ,as Amended by OCFR51055a(g)(6)(ii)(F)(4)
CLASS 1 PWR Pressure Retaining Dissimilar Metal Piping and Vessel Noizze Butt Welds Containing Alloy 82/182, Parts Examined n Extent and Frequency of Examination S Item .. . , : ... ,
Bare metal visual examination once per interval Unmitigated butt weld at Cold Leg Essentially 100% volumetric examination for axial and operating B circumferential flaws in accordance with the applicable temperature (-2410) requirements of ASME Section XI, Appendix VIII, every
> 525°F (274°C) and second inspection period not to exceed 7 years. Baseline
< 580°F (304 0 C) examinations shall be completed by the end of the next I refueling outage after January 20, 2012.
As defined by ASME Code Case N-460,1 31 essentially 100% means greater than 90% of the examination volume of each weld where reduction in coverage is due to interference by another component or part geometry.
ASME Section Xl, Appendix VIII, Supplement 10, "Qualification Requirements for Dissimilar Metal Piping Welds" is applicable to dissimilar metal welds without cast materials. ASME Section XI, Appendix VIII, states that the supplement for the examination of cast stainless steel is "in the course of preparation".
- 4. Reason for Request Florida Power and Light is requesting permission to utilize the Ultrasonic examinations performed in accordance with MRP-139 [41 during the 2010 (SL1-23) outage to satisfy the baseline examination requirements of 10CFR50.55a(g)(6)(ii)(F)(3). However, the welds listed within this request did not satisfy the required ASME Code Case N-770-1 volume coverage, as amended by 10CFR50.55a(g)(6)(ii)(F)(3), due to their configuration. The scanning limitations prohibited essentially 100% ultrasonic examination coverage of the required examination volume from being achieved.
10CFR50.55a(g)(6)(ii)(F)(4) provides the following exception to ASME Code Case N-770-1, "the axial examination coverage requirements of -2500(c) may not be considered to be satisfied unless essentially 100 percent coverage is achieved."
Relief is requested from the 10CFR50.55a(g)(6)(ii)(F)(4) exception to ASME Code Case N-770-1 that essentially 100% coverage be achieved for the baseline volumetric examinations.
L-2013-044 Attachment 3 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
- 5. Proposed Alternative and Basis for Use Proposed Alternative
- 1) Periodic system pressure tests in accordance with ASME Section Xl Category B-P, Table IWB-2500-1.
- 2) Ultrasonic examinations conducted to the maximum extent possible.
- 3) During refueling outages, system engineers walkdown Class 1 systems inside containment. This walkdown was performed to look for system anomalies that could affect plant performance. These examinations identified no evidence of leakage for these components.
- 4) Bare metal visual examinations of the Inspection Item B welds in accordance with ASME Code Case N-722-1. Those examinations identified no evidence of leakage for these components. The combination of these examinations provides confidence that an acceptable level of quality and safety has been maintained.
Basis FPL's, St. Lucie unit 1 contains a thirty (30) inch I.D. inlet and a thirty (30) inch I.D. outlet weld connected to each of the four (4) reactor coolant pumps (RCPs). Each weld joins mill-clad SA-516, Grade 70 carbon steel pipe with SA-240-304L stainless steel cladding to a SA-351, Grade CF8M cast stainless steel safe end.
All of the welds covered by this relief request are found in cold leg temperature (TCo1d) regions of the system. This means there is a lower probability of crack initiation, and a slower crack growth rate. These welds are also very highly flaw tolerant, as demonstrated in the MRP-109 report.J5] No service-induced flaws have been found in these large diameter pipes, even though most of the plants of interest have been in service for over 25 years. [6,7]
Examinations of the eight (8) reactor coolant pump inlet/outlet dissimilar metal welds were performed during previous intervals utilizing manual conventional ultrasonic techniques in accordance with the requirements of ASME Section Xl, Category B-F.
These examinations were performed prior to the requirement to implement ASME Section Xl, Appendix VIII, Supplement 10 qualified equipment, procedures, and personnel. No indications were identified during the previous interval examinations.
During the 2010 (SL1-23) outage, examinations were performed of the eight (8) reactor coolant pump inlet/outlet dissimilar metal welds utilizing a manual non-encoded phased array Ultrasonic (UT) technique. In all cases, examination was performed from the carbon steel side of the weld. No indications were identified. The equipment, procedure, and personnel utilized for the performance of the examinations were qualified in accordance with the requirements of ASME Section XI, Appendix VIII, Supplement 10,
L-2013-044 Attachment 4 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 as implemented through the Performance Demonstration Initiative (PDI) program.
Because the examination of the RCP inlet/outlet configuration is included in the PDI sample set, a site specific mock-up was not applicable for these weld examinations.
Prior to the issuance of the revised final rule 10CFR50.55a (effective date August 22, 2011) that includes the requirement to implement the requirements of ASME Code Case N-770-1 as amended, the Materials Reliability Program issued "Primary System Piping Butt Weld Inspection and Evaluation Guidelines (MRP-139)" that included mandatory elements per the implementation protocol of the Nuclear Energy Institute (NEI) 03-08 initiative. The guideline provided a strategy to manage degradation of butt welds with alloy 82/182 in primary system piping that are 1" NPS or greater and exposed to temperatures greater than or equal to cold leg temperature. The guideline was structured to categorize weld inspections to acknowledge mitigation, temperature, safety significance of flaw orientation, and inspection capabilities. The guideline defined examination locations on the piping, examination requirements for various weld categories, and extent of examination for each location. Finally, the guideline provided evaluation procedures to determine acceptance of flaws, justification for mitigation actions, and changing examination categories.
MRP-139 delineated acceptable coverage of the required examination volume to be calculated separately for axial and circumferential flaw orientations using the actual weld configuration and the procedure's essential variables, if needed. Coverage calculations could be made by manual plotting or by using computer-aided design (CAD) or other software that models the procedure's beam angles and scan plans.
- The inspection was considered complete when, using the qualified procedure and personnel, the coverage for both axial and circumferential flaws was greater than 90% of the required examination volume.
" If >90% coverage for circumferential or axial flaws was not attained then the following independent actions were required:
- If greater than 90% coverage for circumferential flaws could not be met (using qualified personnel and procedures), then specific actions described within the document were required.
- If greater than 90% coverage for axial flaws could not be met, but greater than 90%
coverage was obtained for circumferential flaws (using qualified personnel and procedures), then the examination for axial flaws would be completed to achieve the maximum coverage possible with limitations noted in the examination report.
The UT techniques proposed for each weld were reviewed to determine the amount of examination coverage that could be achieved. Extensive surface conditioning was performed to obtain the maximum amount of coverage. As a result, essentially 100% of the susceptible material in all 8 welds was examined for circumferential flaws.
However, due to the weld taper and no access for examination from the cast CF8M safe-
L-2013-044 Attachment 5 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 end side of the welds, limited examination volume coverage was noted for axial flaws.
Therefore, FPL satisfied the examination volume coverage requirements identified in MRP-139.
The amount of coverage credited was determined in accordance with the qualified examination procedure utilizing field obtained contours. The qualified procedure provides the following for the determination of examination volume coverage:
For axial beam directions (circumferential flaws), coverage of the examination volume is based on a minimum ID impingement angle of 40 to a maximum impingement angle of 50 degrees. The sound beam was directed essentially perpendicular to the weld axis utilizing a raster scan pattern that provided a minimum of 50% overlap of the transmitting element in the indexing direction.
Procedurally, if the weld crown cannot be conditioned to an acceptable level, coverage of the non-cast or accessible portion of the examination volume can be claimed from the base material, without scanning on top of the weld provided the procedurally defined angles cover the required examination volume. Scanning was performed from the carbon steel side only.
For circumferential beam directions (axial flaws), coverage of the examination volume is based upon ID impingement angles between 45 and 60 degrees. The sound beam was directed essentially parallel to the weld axis in both the clockwise and counter-clockwise directions utilizing a raster scan pattern that provided a minimum of 50% overlap of the transmitting element in the indexing direction. Additionally, the search unit was physically skewed into the weld centerline at angles between 0 and 30 degrees for both the clockwise and counterclockwise scan directions. Scanning was performed from the carbon steel side only. Procedurally, coverage could be claimed up to the weld centerline from the non-cast side provided the center point of the ultrasonic beam was capable of intersecting this area.
Qualification for the UT examination of the cast material is "in the course of preparation."
No coverage is claimed in the cast material for the MRP-139 or ASME Code Case N-770-1 exam volume in Table 1, since access for scanning was not available from the cast side of the weld, and the qualified procedure specifically excludes cast materials in the coverage calculation. However, as shown in the figures, the theoretical beam path extends into the cast material for the examinations performed from the carbon steel side of the weld. While the coverage is not included in the Table, UT examinations conducted using Appendix VIII qualified procedures also provide reasonable assurance for the detection of flaws on the cast side of dissimilar metal welds, even though there is presently no standardized process to qualify them.
For the MRP-139 axial and circumferential flaw examination volume coverage achieved, the calculation includes the carbon steel base material and susceptible material. For the ASME Code Case N-770-1 axial and circumferential flaw examination volume coverage
0 1 L-2013-044 Attachment 6 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 achieved, the calculation includes the volume identified in Figure 1 of the code case which, in the case of St. Lucie unit 1, includes cast stainless steel.
Table 1 provides the percent of coverage credited for MRP-139, ASME Section XI Code Case N-770-1 (as described above), and references figures that illustrate the extent of coverage for each weld. The angles, ultrasonic wave modes (Shear-S or Longitudinal-L) that were employed for the manual non-encoded phased array examinations, and limitations encountered are listed for each weld. Arrows and lines on the figures illustrate the phased array search unit beam direction and extent of the area examined.
The examination volume coverage for MRP-139 included the susceptible material and carbon steel base material. As shown in Table 1, essentially 100% of the examination volume coverage for the safety significant circumferential flaw in the susceptible material and carbon steel base material was achieved during the MRP-139 examinations. For all welds except RC-121-6-504 (Figure 6) and RC-121-7-504 (Figure 8), the RCP 1B1 and 1B2 outlet nozzle welds, the ID surface of the susceptible material was interrogated for circumferential flaws with the ultrasonic beam based upon ID impingement angles between 40 to 50 degrees. These welds were obstructed for a small length of the circumference by the adjacent spray line nozzles with RC-121-6-504 having the longest obstruction. For a circumferential distance of 9.85 inches of weld RC-121-6-504 (Figures 6g thru 6m), a portion of or all of the ID surface of the susceptible material was not interrogated for circumferential flaws with the ultrasonic beam, based upon ID impingement angles between 40 to 50 degrees. For welds RC-112-5-504 (Figure 2c) and RC-115-8-504 (Figure 4c), a small amount of the upper portion of the coverage box of the susceptible material was not interrogated for circumferential flaws with the ultrasonic beam due to the weld taper. For weld RC-121-6-504 (Figure 6), a small amount of the upper portion of the coverage box of the susceptible material was not interrogated for circumferential flaws with the ultrasonic beam due to the weld taper in areas away from the spray nozzle. A portion of the carbon steel base material examination volume was not interrogated for circumferential flaws with the ultrasonic beam for welds RC-1 12-5-504 (Figure 2f), RC-1 15-8-504 (Figures 4d thru 4g), and RC-121-6-504 (Figure 6f) due to the proximity of the RTD nozzles.
Due to the guidance included in the Appendix VIII qualified procedure for single sided access configurations, the MRP-139 axial flaw examination volume coverage did not satisfy the essentially 100% requirement. In all cases, the ID surface of the susceptible material for the examination volume that could be credited for axial flaws was interrogated with the ultrasonic beam. Additionally, the attached sketches illustrate that the theoretical beam path extends past the centerline covering the remainder of the susceptible material and into the cast material for the examinations based upon ID impingement angles between 45 and 60 degrees.
As identified in MRP-109 [5], the critical circumferential flaw length for an RCP outlet alloy 82/182 butt weld is 33.2" (MRP-109 Table 5-2) which is -29% of the St. Lucie Unit 1 RCP outlet alloy 82/182 butt weld circumference. While essentially 100% of the (MRP-139) examination volume coverage for the safety significant circumferential flaw in the
L-2013-044 Attachment 7 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 susceptible material was obtained in all cases (Table 1), the largest limitation due to obstruction was observed in Figures 6g through 6m of 9.85 inches length, or 8.7% of the OD circumference. Of this obstructed length, 4.15 inches (3.7%) was identified as having 0% of the coverage box. However, the attached sketches show that some portion above the coverage box in the area of obstruction was interrogated such that a significant flaw would not go undetected. The RCP butt welds operate at cold leg temperatures, nominally 550°F and have a very high resistance to the potential for PWSCC initiation, and a low predicted crack growth rate. The cold leg temperature results in a low probability of cracking as evidenced by the lack of cold leg but weld cracking in the industry as well as the St. Lucie specific examination results of no indications in the eight (8) RCP inlet and outlet butt welds. MRP-109 projected a circumferential flaw would take over 15 years to grow to through wall (Figure 5-58) and over 100 years for a leaking through wall flaw to grow to a critical crack length (Figure 5-
- 65) due to the cold leg operating temperature. Therefore a critical circumferential flaw in an RCP inlet or outlet alloy 82/182 butt resulting from a PWSCC mechanism is not credible due to the small missed coverage area and improving the circumferential flaw examination volume coverage by pipe replacement and relocation of the spray nozzles would not result in an increase in safety. Further, the periodic inspections performed in accordance with the ASME Code Case N-770-1 reinspection frequencies provide adequate assurance for the identification of a safety significant flaw.
As identified in MRP-109 [5], the axial flaw(s) that could result from a primary water stress corrosion cracking (PWSCC) mechanism in the susceptible alloy 82/182 butt weld are not safety significant. The axial critical flaw length for an RCP inlet and outlet alloy 82/182 butt weld is 38.2" (MRP-109 Table 5-2) which exceeds the width of the St. Lucie Unit 1 RCP inlet and outlet alloy 82/182 butt weld material width of 1.5"-2.125".
Therefore a critical axial flaw in an RCP inlet or outlet alloy 82/182 butt resulting from a PWSCC mechanism is not credible and improving the exam axial flaw examination volume coverage would not result in an increase in safety.
During the St. Lucie Unit 1 2010 refueling outage, examination volume coverage for the RCP inlet and outlet welds was extensively improved by grinding and contouring to meet the ASME Section Xl, Appendix VIII, Supplement 10 qualified procedure scanning requirements for the search units. Further contouring is limited by design minimum wall calculations for the piping. To obtain acceptable surface contour conditions for axial flaw examinations, weld build up of the DM weld, additional contouring, and a Construction Code RT examination would be required. To obtain additional circumferential coverage in the area of obstruction from the spray nozzles would require pipe replacement to relocate the spray nozzles. This additional effort to improve axial and circumferential flaw coverage would be a hardship that would not result in an increase of health and safety to the public.
As stated above, the initiation or growth of a safety significant flaw in a cold leg alloy 82/182 DM butt weld is extremely unlikely. However, as an added measure of safety, the industry imposed an NEI-03-08 "needed" requirement, to improve their RCS leak detection capability in part due to the concern with PWSCC. St. Lucie Unit 1 has
L-2013-044 Attachment 8 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 adopted the standardized approach to measuring RCS leak rate in WCAP-16423 [8] and has proceduralized the action levels in WCAP-16456.191 The enhanced leak rate monitoring and detection procedure monitors specific values of unidentified leakage, seven day rolling average, and baseline means. Action levels are initiated as low as when the unidentified leak rate exceeds 0.1 gpm. The enhanced leak detection capability provides an increased level of safety that if a flaw were to grow through-wall, although unlikely, it would be detected prior to it growing to a safety significant size.
Therefore, examination coverage meeting the MRP-139 volume, which includes essentially 100% of the susceptible material for the safety significant circumferential flaw and a significant percentage of the susceptible material for the non safety, significant axial flaw (Attachment 1) combined with the periodic system pressure tests and outage system walk downs, provides an acceptable level of qualify and safety for identifying degradation from PWSCC prior to a safety significant flaw developing.
- 6. Duration of Proposed Alternative This relief request is applicable to the St. Lucie unit 1 Fourth Inservice Inspection Interval which began February 11, 2008 and ends February 10, 2018.
ME8874)," SER Dated November 9, 2012, Accession Number ML12313A415.
- 8. References
- 1. ASME Section Xl, "Rules For Inservice Inspection of Nuclear Power Plant Components,"
2001 Edition with Addenda through 2003.
- 2. Nuclear Regulatory Commission Federal Register part II, Vol. 76, No. 119, effective date August 22, 2011, 10 CFR part 50 Industry Codes and Standards; Amended Requirements; Final Rule.
- 3. ASME Section Xl, Division 1, Code Case N-460, "Alternative Examination Coverage for Class 1 and Class 2 Welds, Section Xl, Division 1."
- 4. Material Reliability Program: Primary System Piping Butt Weld Inspection and Evaluation Guideline (MRP-1 39, Revision 1), EPRI, Palo Alto, CA: 2008. 1015009.
- 5. Material Reliability Program, Alloy 82/182 Pipe Butt Weld Safety Assessment for US PWR Plant Designs (MRP-109): Westinghouse and CE Design Plants, EPRI, Palo Alto, CA: 2005. 1009804.
L-2013-044 Attachment 9 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
- 6. "Changing Frequency of Inspections for PWSCC Susceptible Welds at Cold Leg Temperatures," in Proceedings of 2011 ASME Pressure Vessels and Piping Conference, July 17-21, 2011, Baltimore, Maryland, USA.
- 7. "Technical Basis for a Flaw tolerance Option for Code Case N-770-1 for Large Diameter Cold Leg Piping to Main Coolant Pump Welds, with Obstructions," in Proceedings of 2010 ASME Pressure Vessels and Piping Division Conference, July 2010, Bellevue, WA, USA.
- 8. WCAP-16423-NP, Rev. 0, "Pressurized Water Reactor Owners Group Standard Process and Methods for Calculating RCS Leak Rate for Pressurized Water Reactors,"
Westinghouse Electric Co., September 2006.
- 9. WCAP-16456-NP, Rev. 0, "Pressurized Water Reactor Owners Group Standard RCS Leakage Action Levels and Response Guidelines for Pressurized Water Reactors,"
Westinghouse Electric Co., September 2006.
L-2013-044 Attachment 10 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Table 1 ASME 1
MRP-139V I Section Xl Noz Insp Volume N-770-1121 Angle/
Component ID Location Size Item Cat Coveragoee Covrg e Fig.
ModeLitaon Limitations Axial Circ Axial Circ Flaw Flaw Flaw Flaw RCP 1A1 inlet RC Ilt25-70L la la Cast SS, Weld RC-1 12-5-503 Elbow(CS) to Safe-end (Cast 30 B 67% 100% 49% 74% thru CasSW SS)35-65S ld Taper 2a Cast SS, Weld RCP 1A1 Outlet Safe-end 25-70L thru Taper, RTD RC-112-5-504 (Cast SS) to Pipe(CS) 30 B 68% 99% 48% 69% 35-65S t29 Nozzle RCP 1A2 Inlet 25-70L 3a Cast SS, Weld RC-1 15-6-503 Elbow(CS) to Safe-end (Cast 30 B 71% 100% 52% 74.2% thru Cas e l SS)35-65S 3d Taper RCP 1A2 Outlet 25-70L 4a Cast SS, Weld RC-1 15-8-504 Safe-end (Cast SS) to Pipe 30 B 66% 98.8% 47% 70% thru Taper, RTD (CS)35-65S 4h Nozzle RCP 1B1 Inlet 25-70L 5a Cast SS, Weld RC-121-5-503 Elbow (CS) to Safe-end (Cast 30 B 68% 100% 52% 75.8% thru SS)35-65S Sd Taper RCP 1B1 Outlet 25-70L 6a Cast SS, Weld RC-121-6-504 Safe-end (Cast SS) to Pipe 30 B 67% 92.1% 46% 60% thru Taper, RTD &
(CS)35-65S 6m Spray Nozzle RCP 112 Inlet 25-70L 7a Cast SS, Weld RC-124-5-503 Elbow (CS) to Safe-end (Cast 30 B 68% 100% 51% 75.2% thru SS)35-65S 7d Taper pe RCP 1B2 Outlet 25-70L 8a Cast SS, Weld RC-124-7-504 Safe-end (Cast SS) to Pipe 30 B 64% 97.7% 42% 63% 35-65 thru Taper, Spray (CS)35-65S 8h Nozzle
. o .
Note 1-For thie MRP'-139 axial and circumterential tlaw examination volume coverage achieved, the calculation includes the carbon steel base material and susceptible material.
Note 2-For the ASME Code Case N-770-1 axial and circumferential flaw examination volume coverage achieved, the calculation includes the volume identified in Figure 1 of the code case.
L-2013-044 Attachment 11 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
=-n M
o S .pu. .i.s In i4 e* M 0
- p0
- K to K
Axial Scan (circumferential flaws).*
- I -
Scaled Rollout Showing ID Surfaceo 3r X -
II M-2 AxalSan(ircumferential axaI flnws) i K.
Scaled Rollout Showing ID Surfaceo (0 -1 i 3
Circumferential Scan (axial flaws) o Scaled Rollout Showing ID SurfaceZ Figure la WA1 RCP Inlet (RC-112-1501-771-C)
L-2013-044 Attachment 12 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 0.25-*
K F0.25 I ld O M' 1
Cast SST II CS Elbow Safe End I
1 3.19 1 1 II Cast SST Inspection Examination Volume MRP-139 Inspection (0.70 sq. in.) Examination Volume ASME Section XI Inspection (1.98 sq. in.)
Examination Volume (Cast SST + MRP-139)
(2.68 sq. in.)
Figure lb WA1 RCP Inlet (RC-112-1501-771-C)
L-2013-044 Attachment 13 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Axial Scans (Circumferential Flaws) 100% Coverage - MRP-139 Exam Volume 74% Coverage - ASME Exam Volume ((2.68-0.70)12.68
- 100)
(cast SS exam volume excluded)
Figure 1c 1A1 RCP Inlet (RC-112-1501-771-C)
L-2013-044 Attachment 14 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 I /
MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.66 sq. in.)
Circ Scans (Axial Flaws) 67% Coverage - MRP-139 Exam Volume ((1.98-0.66)/1.98
- 100) 49% Coverage - ASME Exam Volume ((2.68-0.66-0.70)/2.68
- 100)
(cast SS exam volume excluded; exams not conducted on weld due to taper)
Figure ld 1Al RCP Inlet (RC-112-1501-771-C)
L-2013-044 Attachment 15 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 en 0
aM
=m ! puBejes ,l.S 0 0
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O II ~adidsSOfl , w eI n .
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I Axial Scan (circumferential flaws)
Scaled Rollout Showing ID Surface -
en mpug ales Jsg IWO~
- = i.
aedid3 I A a caa Circumferential Scan (axial flaws)
Scaled Rollout Showing ID Surface Figure 2a WA1 Outlet (RC-1 12-5-504)
L-2013-044 Attachment 16 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 0.25+ F 0.25 F-i I
Cast SST Safe End I TI Cip~eI MRP-139 Inspection Cast SST Inspection Examination Volume Examination Volume (1.66 sq. in.)
(0.70 sq. in.)
ASME Section XI Inspection Examination Volume (Cast SST + MRP-139)
(2.36 sq. in.)
Figure 2b 1A1 Outlet (RC-1 12-5-504)
L-2013-044 Attachment 17 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.004 sq. in.)
Axial Scans (Circumferential Flaws) 99% Coverage - MRP-139 Exam Volume (see detailed evaluation) 69% Coverage - ASME Exam Volume ((2.36 - 0.7)/2.36 *100 - (100 - 99))
(cast SS exam volume excluded)
MRP-1 39 examination volume coverage over total OD circumference with no obstructions = 91.5"
- 165 sq. in. = 151 cu in
% of total MRP-139 examination volume outside of obstructed areas = 1511159.7
- 100 = 94.6%
" MRP-1 39 exarrination volume coverage around RTD Pad = 3.54 cu in *2 = 7.08 cu in; 7.08/159.7
- 100 = 4.4%
% MRP-139 examination volume coverage in obstructed areas = 4.4%
Total % Examination Coverage of MRP-139 Examination Volume = 94.6% + 4.4% = 99%
Figure 2c WAl Outlet (RC-1 12-5-504)
L-2013-044 Attachment 18 of 62
. St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
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Figure 2d 1A1 Outlet (RC-1 12-5-504)
L-2013-044 Attachment 19 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 RTD Nozzle Obstruction MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited
.7
/
for beam angles between 40 - 50 degrees) */-
(1.65 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position A & Position C 99% Coverage - MRP-139 Exam Volume ((1.65 sq. in./1.66 sq. in.)
- 100) 70% Coverage - ASME Section Xl Exam Volume ((1.65 sq. in.12.36 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 2d)
Figure 2e WA1 Outlet (RC-1 12-5-504)
L-2013-044 Attachment 20 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 RTD Nozzle Obstruction 360-15'1-=f-'5. -057 0
25* -70" VEY5- 70' TRL 35 - 65" TF(S 35' TRS MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(1.43 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position B 86.1% Coverage - MRP-139 Exam Volume ((1.43 sq. inJ1.66 sq. in.)
- 100) 60.6% Coverage - ASME Section Xl Exam Volume ((1.43 sq. in./2.36 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 2d)
Figure 2f WA1 Outlet (RC-1 12-5-504)
L-2013-044 Attachment 21 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
._ o W)~- La) q-J Cl) a 0 C 0 0Q MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.53 sq. in.)
Circumferential Scans (Axial Flaws) 68% Coverage - MRP-139 40... f.......... ..... r" .......Exam.~......
Volume - ( ((1.66-0.53)/1.66
~ 7)/2 100)
' M tD * ..... O'
'4070 %.overage I- AlIE, ,-xUmn volum .UU)
(cast SS exam volume excluded, exams not conducted on weld due to taper)
Figure 2g 1Al Outlet (RC-1 12-5-504)
L-2013-044 Attachment 22 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 M
£0
=
o
£00 I>
M~qI~M W0 z Axial Scan (circumferential flaws)
Scaled Rollout Showing ID Surface Mo 0 m IScaled flaws) 00
~~~~Circumferential Scan (axial Rollout Showing ID Surface Figure 3a 1A2 IRnolet (RS- 115-6-503)
L-2013-044 Attachment 23 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBERS5, REVISION 0
-0.25 I
'I
'I Cast SST 1~ 'I Safe End ii I I I CS Elbow I jI ji ii Cast SST Inspection Examination Volume MRP-139 Inspection (0.66 sq. in.)
ASME Section XI Inspectio n Examination Volume Examination Volum (1.9 sq. in.)
(Cast SST + MRP-13M.)
(2.56 sq. in Figure 3b 1A2 Inlet (RC-1 15-6-503)
L-2013-044 Attachment 24 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 360-151-057 360-151-057 250 - 700 TRL 35 0 - 65 0 TRS I 250 - 700 TRL 350 - 650 TR8 Axial Scans (Circumferential Flaws) 100% Coverage - MRP-139 Exam Volume 74.2% Coverage - ASME Exam Volume ((2.56-0.66)12.56
- 100)
(cast SS exam volume excluded)
Figure 3c 1A2 Inlet (RC-115-6-503)
L-2013-044 Attachment 25 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 K
MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.56 sq. in.)
Circumferential Scans (Axial Flaws) 71% Coverage - MRP-139 Exam Volume ((1.9-0.56)/1.9
- 100) 52% Coverage - ASME Exam Volume ((2.56-0.56-0.66)/2.56
- 100)
(cast SS exam volume excluded; exams not conducted on weld due to tapered)
Figure 3d 1A2 Inlet (RC-115-6-503)
L-2013-044 Attachment 26 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Ni Cd oa T0 5_
PU3 ales 199 KsOO Ni S*~4*~.-~ ~ P~W..<.4 -
0 OdId S3 EL 0 od CLE 0 CA M 4 Axial Scan (circumferential flaws) CS Scaled Rollout Showing ID Surface rn
'i pug ejes Iss ISM3 r
- 5. ...
. . . .. . ...... . . . .. . ........- -*. .. . .i
'C Odid SO 0=
"p. -
=0 = = -o ial flaws)
Circumferential Scan (axD Surface Scaled Rollout Showing I-Figure 4a 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 27 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 0.25
ý ý-0.25 I
Cast SST Safe End I
I 3.18 MRP-139 Inspecton Cast SST inspection Examination Volume Examination Volume (1.74 sq. in.)
(0.7 sq. in.)
ASME Section XI Inspection Examination Volume (Cast SST + MRP-139)
(2.44 sq. in.)
Figure 4b 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 28 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 360-151-057 360-151-057 250 - 700 TRL 250 - 700 TRL 350 - 650 TRS 350 - 650 TRS MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.03 sq. in.)
Axial Scans (Circumferential Flaws) 98.8% Coverage - MRP-139 Exam Volume (see detailed evaluation) 70% Coverage - ASME Exam Volume ((2.44 - 0.7)/2.44 *100 - (100 - 98.8))
(cast SS exam volume excluded)
MRP-1 39 examination volume coverage over total OD circumference with no obstructions = 93.5"
- 1.71 sq. in. = 159.9 cu in
" of total MRP-139 examination volume outside of obstructed areas = 159.9/168.1
- 100 = 95.1%
" MRP-139 examination volume coverage around RTID Pad #1 =3.08 cu in
- 2 = 6.16 cu in; 6.16/168.1
- 100 = 3.7%
" MRP-1 39 examination volume coverage in obstructed areas =3.7%
Total % Examination Coverage of MRP-139 Examination Volume = 95.1% + 3.7% = 98.8%
Figure 4c 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 29 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 w > r-a 0
0 a
tA 0 0
0
-0 CD m ;F s =D a
Ern 0
a 0 .. . ........ .-........
a .-....
-a 0 C Weld Centerline
.-..-..... ..- -. . . . . . - - -. .. =_ . * .. . .. ... .. . .
} \ /
(
II C-) eJ T .. CD i 0= 0 a N II m 0 i 30 0
....t._
im 0
0 CD
-U x
a
>LI Figure 4d 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 30 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Nozzle Obstruction MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(1.71 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position A & Position E 98.3% Coverage - MRP-139 Exam Volume ((1.71 sq. in.I1.74 sq. in.)
- 100) 70.1% Coverage - ASME Section XI Exam Volume ((1.71 sq. in./2.44 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 4d)
Figure 4e 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 31 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 RTD Nozzle Obstruction
-05Z6D-11 1-057 I TF L 2! ý*- 7(
TF S 3! ýO- 6!
MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(1.66 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position B & Position D 95.4% Coverage - MRP-139 Exam Volume ((1.66 sq. in./1.74 sq. in.)
- 100) 68% Coverage -ASME Section Xl Exam Volume ((1.66 sq. in./2.44 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 4d)
Figure 4f 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 32 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 RTD Nozzle Obstruction 360-151 -560-15 1-057 25' - 700 rR125o 7( 1 TRL 350 - 650 IRS50 6! TRS MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(1.57 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position C 90.2% Coverage - MRP-139 Exam Volume ((1.57 sq. in.11.74 sq. in.)
- 100) 64.3% Coverage - ASME Section XI Exam Volume ((1.57 sq. in./2.44 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 4d)
Figure 4g 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 33 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.59 sq. in.)
Cricumferential Scans (Axial Flaws) 66% Coverage - MRP-139 Exam Volume ((1.74-0.59)/1.74
- 100) 47% Coverage - ASME Exam Volume ((2.44-0.59-0.7)12.44
- 100)
(cast SS exam volume excluded, exams not conducted on weld due to taper)
Figure 4h 1A2 Outlet (RC-1 15-8-504)
L-2013-044 Attachment 34 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 M31 so t O
~~~~Axial Scan (circumferential flaws) = ° Scaled Rollout Showing ID Surface 0 (
X 0I u9 0N ESi~ss IWJ 0
3 U
U, tot C C Ci rcumferentia I1Scan (axial flaws) - - -
OLdltU FvUIIUUL Showing ID Surface oo Figure.5a 1B1 Inlet (RC-121-5-503)
L-2013-044 Attachment 35 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 0.25-1 K 0.25-..
Ij IIDMWE Ii rd I Cast SST Ij Safe End 3. 2 Ii Cast SST Inspection Examination Volume MRP-139 Inspection (0.70 sq. in.) Examination Volume ASME Section XI Inspection (2.19 sq. in.)
Examination Volume (Cast SST + MRP-1 39)
Figure 5b 1B1 Inlet (RC-121-5-503)
L-2013-044 Attachment 36 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Axial Scans (Circumferential Flaws) 100% Coverage -MRP-139 Exam Volume 75.8% Coverage - ASME Exam Volume ((2.89-0.70)/2.89
- 100)
(cast SS exam volume excluded)
Figure 5c 1B1 Inlet (RC-121-5-503)
L-2013-044 Attachment 37 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 V- ---- ~+/-
MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.70 sq. in.)
Circumferential Scans (Axial Flaws) 68% Coverage - MRP-139 Exam Volume ((2.19-0.70)/2.19
- 100) 52% Coverage - ASME Exam Volume ((2.89-0.70-0.70)/2.89
- 100)
(cast SS exam volume excluded; exams not conducted on weld due to tapered)
Figure 5d 181 Inlet (RC-121-5-503)
L-2013-044 Attachment 38 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 M
pug e0ls iss tseo 0
T,
- -- -- --- - -- -- - -- --- - -- - - --- - ---- -- - -- - ((a
.0 C X./ 0
+
- A ia Soa lw)° a:rufrnia Scaled~
ShwigIDSrLc ~ Rolou at 2 C 0 Axial Scan (circumferential flaws)* 5.
'/3 Scaled Rollout Showing ID Surface
-M M1 pu3 2Ma .SS Ise )
7 3
M/
ad~dS3D to
., o\,.* _ "3 C CA
\Cc / e t (i flaws)
Circumferential Scan (axial flaws) =
a=*
bcalea Rollout bnowing Iu Surface Figure 6a 11B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 39 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 HO.25 lI Cast SST Safe End I I I LIFE 1
I Cast SST Inspection MRP-139 Inspection Examination Volume Examination Volume (0.72 sq. in.) 41.52 sq. in.)
ASME Section XI Inspection Examination Volume (Cast SST + MRP-1 39) 12 9A -zn min Figure 6b 11B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 40 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.004 sq. in.)
Axial Scans (Circumferential Flaws) 92.1% Coverage - MRP-139 Exam Volume (see more detailed evaluation) 60% Coverage - ASME Exam Volume (((2.24 - 0.72)/2.24
- 100) - (100 - 92.1))
(cast SS exam volume excluded)
MRP-1 39 examination volume coverage over total OD circumference with no obstructions = 84.1"
- 1.516 sq. in. = 127.5 cu in
% of total MRP-139 examination volume outside of obstructed areas = 127.5/146.1
- 100 = 87.3%
% MRP-139 examination volume coverage around RTD Pad #1 = 2.44
- 2 = 4.88 cu in; 4.88/146.1
- 100 = 3.3%
% MRP-139 examination volume coverage around Spray Nozzle = 1.08
- 2 = 2.16 cu in ; 2.16/146.1
- 100 = 1.5%
% MRP-1 39 examination volume coveraae in obstructed areas = 3.3% + 1.5% = 4.8%
Total % Examination Coverage of MRP-139 Examination Volume = 87.3% + 4.8% = 92.1%
Figure 6c 1 B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 41 of 62 St Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 CI St.Lucie FOURTH Unit INTERVAL INSPECTION RELIEF REQUEST NUMBER 15, REVISION 0 -4 I m Lcn'~
! f0 0 -J I -
I _
I -
~- I 2 Weld Centedln i V I, .
CO.
\a 2
z Figure 6d 11B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 42 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 I I I I MRP-139 Inspection Examination Volume Coverage (per--\ I EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees) \
(1.516 sq. in.)
_L1__ . . .. .
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position A & Position C 99.7% Coverage - MRP-139 Exam Volume ((1.516 sq. in./1.52 sq. in.)
- 100) 67.7% Coverage - ASME Section Xl Exam Volume ((1.516 sq. in.12.24 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 6d)
Figure 6e 11B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 43 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 I I I I I I MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(1.48 sq. in.)
I I I I I -
~ 7:
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position B 97.4% Coverage - MRP-139 Exam Volume ((1.48 sq. in./1.52 sq. in.)
- 100) 66.1% Coverage - ASME Section XI Exam Volume ((1.48 sq. in./2.24 sq. in.)
- 100)
Obstruction Due to RTD Nozzle (Reference Figure 6d)
Figure 6f 1B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 44 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 I-
-I A
........ .I----- --
t.
,.. ~
0 i
J
/
/
Figure 6g 1B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 45 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
- 35o -650 7,'
MRP-139 Inspection Examination Volume Coverage (per t ' /
EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited ,
for beam angles between 40 - 50 degrees) \ , '/
(1.516 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position A & Position I 99.7% Coverage - MRP-139 Exam Volume ((1.516 sq. in./1.52 sq. in.)
- 100) 67.7% Coverage - ASME Section XI Exam Volume ((1.516 sq. in./2.24 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 6g)
Figure 6h 11B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 46 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 I I MRP-139 Inspection Examination Volume Coverage (per-EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(1.25 sq. in.)
I I I /
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position B & Position H 82,2% Coverage - MRP-139 Exam Volume ((1.25 sq. in./1.52 sq. in.)
- 100) 55.8% Coverage -ASME Section Xl Exam Volume ((1.25 sq. in.12.24 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 6g)
Figure 6i 11B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 47 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 St uieUi1 Spray Nozzle Obstruction 6U2~ IM51 RERL RIERS MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.7 sq. in.)
' :A Axial Scan Line (Circumferential Flaws) Cross-Section @ Position C & Position G 46% Coverage - MRP-139 Exam Volume ((0.7 sq. in./1.52 sq. in.)
- 100) 31.2% Coverage - ASME Section X1 Exam Volume ((0.7 sq. in.12.24 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 6g)
Figure 6j 1 B 1 Outlet (RC-1 21-6-504)
L-2013-044 Attachment 48 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 II **I MRP-139 Inspection Examination Volume Coverage (per- -
EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.0 sq. in.)
I I -
LI..---------------I .. - - - - - - - - -
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position D & Position F 0% Coverage - MRP-139 Exam Volume ((0 sq. in./1.52 sq. in.)
- 100) 0% Coverage - ASME Section Xl Exam Volume ((0 sq. in./2.24 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 6g)
Figure 6k 1 B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 49 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
~
-~~ ~ ~-
-T--- 5 6, MRP-139 Inspection Examination Volume Coverage (per-'.
EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited . r i for beam angles between 40 - 50 degrees) I (0.0 sq. in.) . ,
- L --- --- - -.-
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position E 0% Coverage - MRP-139 Exam Volume ((0 sq. in.11.52 sq. in.) ' 100) 0% Coverage - ASME Section Xl Exam Volume ((0 sq. In./2.24 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 6g)
Figure 61 1B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 50 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0
- =
/
/
/
MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.50 sq. in.)
Cricumferential Scans (Axial Flaws) 67% Coverage - MRP-139 Exam Volume ((1.52 - 0.50)/1.52 *100) 46% Coverage - ASME Exam Volume ((2.24 - 0.5 - 0.72)/2.24 *100)
(cast SS exam volume excluded, exams not conducted on weld due to taper)
Figure 6m 1 B1 Outlet (RC-121-6-504)
L-2013-044 Attachment 51 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 M
cn 44 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ S 5_ 0 p w (Scant(circumfrenial flaws) n oAxial Sa crufrnilfas Scaled Rollout Showing ID Surface C n CnC 0
WE I aI 1 IeR 2 -
1 nlt 2 RC 145-503)
L-2013-044 Attachment 52 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 0.;
- I A
~
_0.25 II II DM We d II I,
Cast SST ii CS Elbow Safe End It II I 3.20 II I' II II Cast SST Inspection Examination Volume MRP-139 Inspection (0.66 sq. in.) Examination Volume ASME Section XI Inspection (2.0 sq. in.)
Examination Volume (Cast SST + MRP-1 39)
(2.66 sq. in.)
Figure 7b 1B2 Inlet (RC-124-5-503)
L-2013-044 Attachment 53 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 360-151-057 250 700 TRL 350 " 650 TRS Axial Scans (Circumferential Flaws) 100% Coverage - MRP-139 Exam Volume 75.2% Coverage - ASME Exam Volume ((2.66-0.66)/2.66
- 100)
'cast' I SS exam.. voIm excluded Figure 7c 1B2 Inlet (RC-124-5-503)
L-2013-044 Attachment 54 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.64 sq. in.)
Circumferential Scans (Axial Flaws) 68% Coverage - MRP-139 Exam Volume ((2.0-0.64)12.0
- 100) 51% Coverage - ASME Exam Volume ((2.66-0.64-0.66)12.66
- 100)
(cast SS exam volume excluded; exams not conducted on weld due to tapered)
Figure 7d 1 B2 Inlet (RC-1 24-5-503)
L-2013-044 Attachment 55 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 U)
M 0
t0 m puP304P 1 LSS -M 0 3
C
- - - -- -,--- - S3~~
ed~~~~~d .... - * -=r=*; . ......- - =, - - - - - - - -= -
0 3
0 Di SO M (aE S
4
.... . - P 31 0 0 "
=>
(1 F3 Axial Scan (circumferential flaws)
(A Scaled Rollout Showing ID Surface C,,
Si -V 0
0 to m pU3 49S ISS $eS3 3
3 C
o C ed!d S3 3
-K 3
CO S
'C CL 01 C
Xo C z
0 N
Circumferential Scan (axial flaws)
Scaled Rollout Showing IDSurface Figure 8a 1832 Outlet (RC-1 24-7-504)
L-2013-044 Attachment 56 of 62 St.Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Cast SSTCSPp Safe End I I 13.181 Cast SST Inspection MRP-139 Inspection Examination Volume Examination Volume (0.75 sq. in.) (1.44 sq. in.)
ASME Section Xl Inspection Examination Volume (Cast SST + MRP-139)
(2.19 sq. in.)
Figure 8b 1 B2 Outlet (RC-124-7-504)
L-2013-044 Attachment 57 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Axial Scans (Circumferential Flaws) 97.7% Coverage - MRP-139 Exam Volume (see detailed evaluation) 63% Coverage - ASME Exam Volume ((2.19 - 0.75)/2.19
- 100) - (100 - 97.7))
(cast SS exam volume excluded)
MRP-1 39 examination volume coverage over total OD circumference with no obstructions = 89"
- 1.44 sq. in. = 128.2 cu in
% of total MRP-139 examination volume outside of obstructed areas = 128.2!138.07
- 100 = 92.8%
% MRP-139 examination volume coverage around Spray Nozzle = 3.38
- 2 = 6.76 cu in; 6.76/138.07
- 100 = 4.9%
% MRP-139 examination volume coverage in obstructed areas = 4.9%
Total % Examination Coverage of MRP-139 Examination Volume = 92.8% + 4.9% = 97.7%
Figure 8c 1 B2 Outlet (RC-1 24-7-504)
L-2013-044 Attachment 58 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 m F SRI-I------
Kj ............
I~
-~
+F~j a' 1 0 In, 5
a 8
I Figure 8d 1B2 Outlet (RC-1 24-7-504)
L-2013-044 Attachment 59 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 MRP-139 Inspection Examination Volume Coverage (per -\
EPRI-OMW-PA-1 Rev. 1; exam volume can be only credited -,\
for beam angles between 40 - 50 degrees) \
(1.44 sq. in.)
7 /
7 /
4 ,7~
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position A & Position E 100% Coverage - MRP-139 Exam Volume ((1.44 sq. in.I1.44 sq. in.)
- 100) 65.7% Coverage - ASME Section Xl Exam Volume ((1.44 sq. in t2.19 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 8d)
Figure 8e 1 B2 Outlet (RC-1 24-7-504)
L-2013-044 Attachment 60 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Spray Nozzle Obstruction MRP-139 Inspection Examination Volume Coverage (per EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.96 sq. in.)
Axial Scan Line (Circumferential Flaws) Cross-Section @ Position B & Position D 66.7% Coverage - MRP-139 Exam Volume ((0.96 sq. inJ1.44 sq. in.) ' 100) 43.8% Coverage - ASME Section Xl Exam Volume ((0.96 sq. inJ2.19 sq. in.) 100)
Obstruction Due to Spray Nozzle (Reference Figure 8d)
Figure 8f 1B2 Outlet (RC-124-7-504)
L-2013-044 Attachment 61 of 62 St. Lucie Unit I FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 Spray Nozzle Obstruction 36O-13CO8l1 .57 25- 7025Rt76-ITRL 35- j'653PMi-iTftS MRP-139 Inspection Examination Volume Coverage (per-'.
EPRI-DMW-PA-1 Rev. 1; exam volume can be only credited for beam angles between 40 - 50 degrees)
(0.78 sq. In.)
.0 Axial Scan Line (Circumferential Flaws) Cross-Section @ Position C 54.2% Coverage - MRP-139 Exam Volume ((0.78 sq. in.11.44 sq. in.)
- 100) 35.6% Coverage - ASME Section Xl Exam Volume ((0.78 sq. inJ2.19 sq. in.)
- 100)
Obstruction Due to Spray Nozzle (Reference Figure 8d)
Figure 8g 1 B2 Outlet (RC-1 24-7-504)
L-2013-044 Attachment 62 of 62 St. Lucie Unit 1 FOURTH INSPECTION INTERVAL RELIEF REQUEST NUMBER 5, REVISION 0 I,- I 0
T" 0 0~ 00 (0
C14 MRP-139 Inspection Examination Volume Limitation (per EPRI-DMW-PA-1 Rev. 1; exam volume can be claimed up to weld centerline)
(0.52 sq. in.)
Circumferential Scans (Axial Flaws) 64% Coverage - MRP-139 Exam Volume ((1.44 - 0.52)/1.44
- 100) 42% Coverage - ASME Exam Volume ((2.19 - 0.52 - 0.75)12.19
- 100)
(cast SS exam volume excluded, exams not conducted on weld due to taper)
Figure 8h 1 B2 Outlet (RC-1 24-7-504)