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{{#Wiki_filter:102-07929-MLL/MDD June 14, 2019 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555-0001  
{{#Wiki_filter:10 CFR 50.SSa MARIA L. LACAL Se ni or Vi ce Preside nt, Nuclea r Reg ul atory & Ove rsight Palo Verde 102-07929-MLL/MDD Nuclear Generating Station June 14, 2019                                                                       P.O. Box 52034 Phoeni x, AZ 85072 U. S. Nuclear Regulatory Commission                                                 Mai l Station 7605 ATIN: Document Control Desk                                                         Tel 623.393.649 1 Washington, DC 20555-0001


==Dear Sirs:==
==Dear Sirs:==


==Subject:==
==Subject:==
Palo Verde Nuclear Generating Station Unit 3 Docket No. STN 50-530 Renewed Operating License No. NPF-74 10 CFR 50.SSa MARIA L. LACAL Se ni o r Vi ce Pr eside n t, N uc l ea r Reg ul a t o ry & Ove r s i g ht Palo Verde Nuclear Generating Station P.O. B ox 52034 P h oe ni x, AZ 85072 M ai l Stat i o n 7605 Tel 623.393.6 4 9 1 Response to Request for Additional Information  
Palo Verde Nuclear Generating Station Unit 3 Docket No. STN 50-530 Renewed Operating License No. NPF-74 Response to Request for Additional Information - Relief Request 63 -
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval By letter number 102-07851, dated January 10, 2019 (Agencywide Documents Access and Management System Accession No. ML19010A307), Arizona Public Service Company (APS) submitted relief request 63 in accordance with 10 CFR 50.55a(g)(S)(iii).
Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval By letter number 102-07851, dated January 10, 2019 (Agencywide Documents Access and Management System Accession No. ML19010A307), Arizona Public Service Company (APS) submitted relief request 63 in accordance with 10 CFR 50.55a(g)(S)(iii). Certain ultrasonic examinations of welds identified in letter 102-07851 required by Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, sub-articles IWB-2500 and IWC-2500 have been determined to be impractical for Unit 3 third 10-Year inservice inspection interval.
Certain ultrasonic e x aminations of welds identified in letter 102-07851 required by Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, sub-articles IWB-2500 and IWC-2500 have been determined to be impractical for Unit 3 third 10-Year inservice inspection interval.
The Nuclear Regulatory Commission (NRC) staff has requested additional information (RAI) to complete their review with regard to ASME Code class 2 components. A clarifying phone call was held between NRC and APS on April 4, 2019, to discuss the additional information needed. The APS response to the request for additional information is provided in the enclosure to this letter. The response due date was June 7, 2019. APS has granted a week extension to June 14, 2019 for the response during a call with the NRC project manager on June 5, 2019 .
The Nuclear Regulato r y Commission (NRC) staff has requested additional information (RAI) to complete their review with regard to ASME Code class 2 components.
No new commitments are being made in this submittal. If you have any questions about this request, please contact Michael D. Dilorenzo, Department Leader of Nuclear Regulatory Affairs, at (623) 393 - 3945 .
A clarifying phone call was held between NRC and APS on April 4, 2019, to discuss the additional information needed. The APS response to the request for additional information is provided in the enclosure to this letter. The response due date was June 7, 2019. APS has granted a week extension to June 14, 2019 for the response during a call with the NRC project manager on June 5, 2019. No new commitments are being made in this submittal.
Sincerely,
If you have any questions about this request, please contact Michael D. Dilorenzo, Department Leader of Nuclear Regulatory Affairs, at (623) 393-3945. Sincerely, ~* cxf~ MLL/MDD  
    ~
* cxf~
MLL/MDD


==Enclosure:==
==Enclosure:==
Response to Request for Additional Information - Relief Request 63, Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval cc:    S. A. Morris          NRC Region IV Regional Administrator S. P. Lingam          NRC NRR Project Manager for PVNGS C. A. Pea body        NRC Senior Resident Inspector for PVNGS A member of the STARS Alliance LLC Callaway
* Diablo Canyon
* Palo Verde
* Wo l f Cr e ek


Response to Request for Additional Information
Enclosure Response to Request for Additional Information Relief Request 63 Unit 3 Impractical Examination s for the Third 10-Year Inservice Inspection Interval
-Relief Request 63, Unit 3 Impractical E x aminations for the Third 10-Year Inservice Inspection Interval cc: S. A. Morris S. P. Lingam C. A. Pea body NRC Region IV Regional Administrator NRC NRR Project Manager for PVNGS NRC Senior Resident Inspector for PVNGS A member of the STARS Alliance L L C Callaway* Diablo Canyon* Palo Verde* Wo l f Cr e ek Enclosure Response to Request for Additional Information Relief Request 63 Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Enclosure Response to Request for Additional Information  
 
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval 10 CFR 50.SSa Request Number 63 Response to Request for Additional Information Unit 3 Inservice Inspection Impracticality Third 10-Year Inservice Inspection Interval By letter number 102-07851, dated January 10, 2019, Agencywide Documents Access and Management System Accession No. ML19010A307, Arizona Public Service Company (APS) submitted relief request 63 in accordance with 10 CFR 50.55a(g)(S)(iii).
Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval 10 CFR 50.SSa Request Number 63 Response to Request for Additional Information Unit 3 Inservice Inspection Impracticality Third 10-Year Inservice Inspection Interval By letter number 102-07851, dated January 10, 2019, Agencywide Documents Access and Management System Accession No. ML19010A307, Arizona Public Service Company (APS) submitted relief request 63 in accordance with 10 CFR 50.55a(g)(S)(iii). Certain ultrasonic examinations of welds identified in letter 102-07851 required by Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, sub-articles IWB-2500 and IWC-2500 have been determined to be impractical for Unit 3 third 10-Year inservice inspection interval (ISi).
Certain ultrasonic examinations of welds identified in letter 102-07851 required by Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, sub-articles IWB-2500 and IWC-2500 have been determined to be impractical for Unit 3 third 10-Year inservice inspection interval (ISi). The Nuclear Regulatory Commission (NRC) staff has reviewed RR 63 and requested additional information in order to complete the review with regard to ASME Code Class 2 components.
The Nuclear Regulatory Commission (NRC) staff has reviewed RR 63 and requested additional information in order to complete the review with regard to ASME Code Class 2 components. A clarifying phone call was held between NRC and APS on April 4, 2019, to discuss the additional information needed. The APS response is provided after each NRC request for additional information.
A clarifying phone call was held between NRC and APS on April 4, 2019, to discuss the additional information needed. The APS response is provided after each NRC request for additional information.
NRC MPHB-RAl-1:
NRC MPHB-RAl-1:
Please discuss whether, as a substitute, examinations were performed on similar welds in the same piping systems that essentially 100 percent coverage could be achieved.
Please discuss whether, as a substitute, examinations were performed on similar welds in the same piping systems that essentially 100 percent coverage could be achieved.
APS Response:
APS Response:
There are no examinations that can formally be credited in place of the limited examinations identified in Tables 2 and 3 of Relief Request 63. However, other ultrasonic (UT) examinations were completed on similar welds of the same piping systems, often on the same lines, that have essentially 100 percent coverage and no rejectable indications.
There are no examinations that can formally be credited in place of the limited examinations identified in Tables 2 and 3 of Relief Request 63. However, other ultrasonic (UT) examinations were completed on similar welds of the same piping systems, often on the same lines, that have essentially 100 percent coverage and no rejectable indications. Those completed UT examinations which correspond to the limited examinations within the same piping systems are referenced in Tables 2A and 3A.
Those completed UT examinations which correspond to the limited examinations within the same piping systems are referenced in Tables 2A and 3A. NRC MPHB-RAl-2:
NRC MPHB-RAl-2:
One of the notes associated with Tables 2 and 3 of the relief request states that " ... All piping material for C-F-1 welds in the Table above are Austenitic Stainless Steel ... " Please discuss the exact weld metal (material specification) used in the welds of Tables 2 and 3 APS Response:
One of the notes associated with Tables 2 and 3 of the relief request states that " ... All piping material for C-F-1 welds in the Table above are Austenitic Stainless Steel ... " Please discuss the exact weld metal (material specification) used in the welds of Tables 2 and 3 APS Response:
Tables 2B and 3B have been provided as supplemental information to Tables 2 and 3 that were originally submitted as part of Relief Request 63. Tables 2B and 3B provide two weld material specifications for each weld. Specification "SFA-5.9 / ER316 / F6 / GTAW" was used for the initial passes (root) of each weld. The balance of each weld was completed using either SFA-5.9 / ER316 / F6 / GTAW or SFA-5.4 / ER316 / F5 / SMAW.
Tables 2B and 3B have been provided as supplemental information to Tables 2 and 3 that were originally submitted as part of Relief Request 63. Tables 2B and 3B provide two weld material specifications for each weld. Specification "SFA-5.9 / ER316 / F6 / GTAW" was used for the initial passes (root) of each weld. The balance of each weld was completed using either SFA-5.9 / ER316 / F6 / GTAW or SFA-5.4 / ER316 / F5 / SMAW.
Enclosure Response to Request for Additional Information  
 
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval NRC MPH8-RAl-3:
Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval NRC MPH8-RAl-3:
Tables 2 and 3 of the relief request show that welds are located in various zones. Please describe the location of these zones (inside or outside of the containment), how the zones are designated, operational leakage monitoring and radiation dose, if any, in these zones. APS Response:
Tables 2 and 3 of the relief request show that welds are located in various zones. Please describe the location of these zones (inside or outside of the containment), how the zones are designated, operational leakage monitoring and radiation dose, if any, in these zones.
The location of the applicable zones are provided in Tables 28 and 38. The ISi program is subdivided into zones for convenience of program management.
APS Response:
Each zone may represent a room within the plant or a portion of a system separated by building penetrations, code classification boundaries, or otherwise.
The location of the applicable zones are provided in Tables 28 and 38. The ISi program is subdivided into zones for convenience of program management. Each zone may represent a room within the plant or a portion of a system separated by building penetrations, code classification boundaries, or otherwise. The Unit 3 Inservice Inspection program currently defines zones 1 through 6, and zones 16 through 129. Zones 7 through 15 are not currently used as zone designations within the program. The physical locations of each weld have been provided in Tables 28 and 38, however the piping/line description resides in Tables 2 and 3 of Relief Request 63. Leak detection/monitoring is provided for the areas and/or rooms and includes control room indication. Dose rates for each room have been provided in Tables 28 and 38 as averages during the previous 5 years.
The Unit 3 Inservice Inspection program currently defines zones 1 through 6, and zones 16 through 129. Zones 7 through 15 are not currently used as zone designations within the program. The physical locations of each weld have been provided in Tables 28 and 38, however the piping/line description resides in Tables 2 and 3 of Relief Request 63. Leak detection/monitoring is provided for the areas and/or rooms and includes control room indication.
NRC MPH8-RAl-4:
Dose rates for each room have been provided in Tables 28 and 38 as averages during the previous 5 years. NRC MPH8-RAl-4:
Please discuss the design and operating conditions (e.g., temperature and pressure) of the welds in Tables 2 and 3 of the relief request.
Please discuss the design and operating conditions (e.g., temperature and pressure) of the welds in Tables 2 and 3 of the relief request. APS Response:
APS Response:
Design and operating conditions (e.g., temperature and pressure) of the welds identified in Tables 2 and 3 have been provided in Tables 28 and 38. 2 Enclosure Response to Request for Additional Information  
Design and operating conditions (e.g., temperature and pressure) of the welds identified in Tables 2 and 3 have been provided in Tables 28 and 38.
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 2A -SUQQlemental Information for Category C-F-1, Item CS.11 Welds Limited Exam Weld Information Similar Code Required Volume Weld Information ISI Zone Weld No.(s) Pipe Comments No. Weld No. Pipe Diam. Weld Configuration Credited with Diam. Weld Configuration (inches) Code Required (inches) (in direction of flow) Volume 83 74-105 14 sweepolet to pipe 74-115 14 pipe to elbow Same line 90 85-9 24 flange to pipe 85-29 24 pipe to elbow Same line 90 85-11 24 pipe to valve 85-29 24 pipe to elbow Same line 91 76-7 12 orifice to pipe 76-8, 76-2 12 pipe to elbow (76-8), Same line reducer to pipe (76-2) 91 77-7 12 orifice to pipe 77-8 12 pipe to elbow Same line 91 77-14 12 pipe to valve 77-8 12 pipe to elbow Same line 91 77-16 12 valve to pipe 77-8 12 pipe to elbow Same line 78-45, 78-44, elbow to pipe (78-45), 98 78-47 12 pipe to valve 78-43 12 pipe to elbow (78-44), Same line elbow to pipe (78-43) 22-21, 22-17, pipe to elbow (22-21), 101 71-123 16 valve to pipe 22-14 16 pipe to elbow (22-17), Same line pipe to elbow (22-14) 104 85-46 20 pipe to valve 85-44 20 elbow to pipe Same line 104 85-47 20 valve to pipe 85-44 20 elbow to pipe Same line 3 Enclosure Response to Request for Additional Information  
2
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 3A -Sui:;1i:;1lemental Information for Category C-F-1, Item CS.21 Welds Limited Exam Weld Information Similar Code Required Volume Weld Information  
 
!SI Zone Weld No.(s) Pipe Comments No. Weld No. Pipe Diam. Weld Configuration Credited with Diam. Weld Configuration (inches) Code Required (inches) (in direction of flow) Volume tee to pipe (110-25), This line changes line number and 110-25, 110-33, size, but runs continuous with the 110 110-17 2 pipe to valve 110-34 4 orifice to pipe (110-33), line of the three welds identified as pipe to elbow (110-34) similar welds tee to pipe (110-25), This line changes line number and 110-25, 110-33, size, but runs continuous with the 110 110-52 2 pipe to tee 110-34 4 orifice to pipe (110-33), line of the three welds identified as pipe to elbow (110-34) similar welds This line changes line number and 111 111-34 4 pipe to orifice 111-21 2 pipe to elbow size, but runs continuous with the line of the weld identified as a similar weld This line changes line number and 113 113-28 2 valve to pipe 113-2, 113-9 4 (113-2), elbow to pipe (113-2), size, but runs continuous with the 2 (113-9) elbow to pipe (113-9) line of the two welds identified as similar welds 118 118-46 3 penetration to pipe 118-47, 118-48 3 Pipe to elbow (118-47), Same line elbow to pipe (118-48) 118 118-49 3 pipe to valve 118-47, 118-48 3 Pipe to elbow (118-47), Same line elbow to pipe (118-48) 119 119-52 3 pipe to valve 119-26 3 tee to pipe Same line This line changes line number and 119 119-53 2 valve to pipe 119-26 3 tee to pipe size, but runs continuous with the line of the weld identified as a similar weld 4 Enclosure Response to Request for Additional Information  
Enclosure Response to Request     for Additional   Information - Relief   Request     63 - Unit 3 Impractical       Examinations for the Third 10-Year Inservice Inspection Interval Table 2A - SUQQlemental Information for Category C-F-1, Item CS.11 Welds Limited Exam Weld Information                 Similar Code Required Volume Weld Information ISI Zone                                                   Weld No.(s)                                                           Comments Pipe No.               Pipe Diam.                         Credited with                      Weld Configuration Weld No.                   Weld Configuration                         Diam.
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 2B -SURRlemental Information for Category C-F-1, Item CS.11 Welds ISI Pipe Typical Design Conditions Operating Conditions Weld Filler Material Specifications Area Dose Leakage Zone No. Diam. ASME / AWS / F No. / Process Plant Location Rates Monitoring Pressure Temp. Pressure Temp. No. (inches) (mR/hr) (psi) (Deg. F) (psi) (Deg. F) SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg. -83 74-105 14 SFA-5.4 / ER316 / F5 / SMAW Shutdown Cooling 0.3 -9.0 Yes 650 400 370 350 HTX'A' Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -90 85-9 24 SFA-5.4 / ER316 / F5 / SMAW East Mechanical 0.2 -22.0 Yes 100 350 100 120 Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -90 85-11 24 SFA-5.4 / ER316 / F5 / SMAW East Mechanical 0.2 -22.0 Yes 100 350 100 120 Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -91 76-7 12 SFA-5.4 / ER316 / F5 / SMAW West Mechanical 0.2 -11.0 Yes 650 550 370 350 Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -91 77-7 12 SFA-5.4 / ER316 / F5 / SMAW West Mechanical 0.2 -11.0 Yes 650 550 370 350 Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -91 77-14 12 SFA-5.4 / ER316 / F5 / SMAW West Mechanical 0.2 -11.0 Yes 650 550 370 350 Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -91 77-16 12 SFA-5.4 / ER316 / F5 / SMAW West Mechanical 0.2 -11.0 Yes 2485 650 370 350 Penetration Room SFA-5.9 / ER316 / F6 / GTAW Containment  
(inches)                         Code Required                       (in direction of flow)
-98 78-47 12 SFA-5.4 / ER316 / F5 / SMAW 103' el. Outside <0.2 Yes 2485 650 370 350 Bio-Shield SFA-5.9 / ER316 / F6 / GTAW Containment
(inches)
-90' 101 71-123 16 el. Outside Bio-0.5 -4.0 Yes 485 400 370 350 SFA-5.4 / ER316 / F5 / SMAW Shield Auxiliary Bldg -104 85-46 20 SFA-5.9 / ER316 / F6 / GTAW Low Pressure 0.4 -33.0 Yes 100 350 100 120 SFA-5.4 / ER316 / F5 / SMAW Safety Injection Pump Room 42' el. Auxiliary Bldg -104 85-47 20 SFA-5.9 / ER316 / F6 / GTAW Low Pressure 0.4 -33.0 Yes 100 350 100 120 SFA-5.4 / ER316 / F5 / SMAW Safety Injection Pump Room 42' el. 5 Enclosure Response to Request for Additional Information
Volume 83     74-105           14       sweepolet to pipe       74-115             14             pipe to elbow                   Same line 90     85-9           24           flange to pipe         85-29             24             pipe to elbow                   Same line 90     85-11         24           pipe to valve         85-29             24             pipe to elbow                   Same line pipe to elbow (76-8),
-Relief Request 63 -Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 3B -SUQQlemental Information for Category C-F-1, Item CS.21 Welds Design Conditions Operating Conditions
91       76-7           12         orifice to pipe     76-8, 76-2           12                                             Same line reducer to pipe (76-2) 91       77-7           12         orifice to pipe         77-8             12             pipe to elbow                   Same line 91     77-14           12           pipe to valve         77-8             12             pipe to elbow                   Same line 91     77-16           12           valve to pipe         77-8             12             pipe to elbow                   Same line elbow to pipe (78-45),
!SI Zone Weld Pipe Filler Material Specifications Typical Area Dose Leakage No. No. Diam. ASME / AWS / F No./ Process Plant Location Rates (mR/hr) Monitoring Pressure Temp. Pressure Temp. (inches) (psi) (Deg. F) (psi) (Deg. F) SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -West 110 110-17 2 Mechanical 0.2 -11.0 Yes 2050 350 1822 350 SFA-5.4 / ER316 / F5 / SMAW Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -West 110 110-52 2 Mechanical 0.2 -11.0 Yes 2485 650 1822 350 SFA-5.4 / ER316 / F5 / SMAW Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -West 111 111-34 4 Mechanical 0.2 -11.0 Yes 2485 650 1822 350 SFA-5.4 / ER316 / F5 / SMAW Penetration Room SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -East 113 113-28 2 Mechanical 0.2 -22 Yes 2485 650 1822 350 SFA-5.4 / ER316 / F5 / SMAW Penetration Room SFA-5.9 / ER316 / F6 / GTAW Containment
78-45, 78-44,                                                          Same line 98     78-47           12           pipe to valve                           12         pipe to elbow (78-44),
-90' 118 118-46 3 el. Outside Bio-0.5 -4.0 Yes 2485 650 1822 350 SFA-5.4 / ER316 / F5 / SMAW Shield SFA-5.9 / ER316 / F6 / GTAW Containment
78-43 elbow to pipe (78-43) pipe to elbow (22-21),
-90' 118 118-49 3 el. Outside Bio-0.5 -4.0 Yes 2485 650 1822 350 SFA-5.4 / ER316 / F5 / SMAW Shield SFA-5.9 / ER316 / F6 / GTAW Containment
22-21, 22-17, 101    71-123           16           valve to pipe                           16         pipe to elbow (22-17),               Same line 22-14 pipe to elbow (22-14) 104     85-46           20           pipe to valve         85-44             20             elbow to pipe                   Same line 104     85-47           20           valve to pipe         85-44             20             elbow to pipe                   Same line 3
-90' 119 119-52 3 el. Outside Bio-0.5 -4.0 Yes 2485 650 1822 350 SFA-5.4 / ER316 / F5 / SMAW Shield SFA-5.9 / ER316 / F6 / GTAW Auxiliary Bldg -CH 119 119-53 2 SFA-5.4 / ER316 / F5 / SMAW Pump Valve Gallery 0.2 -2.0 Yes 2485 650 1822 350 100' el. 6}}
 
Enclosure Response to Request for Additional Information             - Relief Request     63   - Unit 3   Impractical       Examinations       for the Third 10-Year Inservice Inspection Interval Table 3A - Sui:;1i:;1lemental Information for Category C-F-1, Item CS.21 Welds Limited Exam Weld Information                     Similar Code Required Volume Weld Information
!SI Zone                                                     Weld No.(s)
Pipe                                                     Comments No.               Pipe Diam.                             Credited with                        Weld Configuration Weld No.                 Weld Configuration                             Diam.
(inches)                             Code Required                         (in direction of flow)
(inches)
Volume This line changes line number and tee to pipe (110-25),
110-25, 110-33,                                                   size, but runs continuous with the 110   110-17           2         pipe to valve                                 4         orifice to pipe (110-33),
110-34                                                      line of the three welds identified as pipe to elbow (110-34) similar welds This line changes line number and tee to pipe (110-25),
110-25, 110-33,                                                   size, but runs continuous with the 110   110-52           2           pipe to tee                                 4         orifice to pipe (110-33),
110-34                                                      line of the three welds identified as pipe to elbow (110-34) similar welds This line changes line number and size, but runs continuous with the 111   111-34           4         pipe to orifice           111-21               2               pipe to elbow line of the weld identified as a similar weld This line changes line number and 4 (113-2),       elbow to pipe (113-2),       size, but runs continuous with the 113    113-28          2          valve to pipe           113-2, 113-9                                                   line of the two welds identified as 2 (113-9)        elbow to pipe (113-9) similar welds Pipe to elbow (118-47),
118   118-46           3       penetration to pipe     118-47, 118-48           3                                                       Same line elbow to pipe (118-48)
Pipe to elbow (118-47),
118   118-49           3           pipe to valve       118-47, 118-48           3                                                       Same line elbow to pipe (118-48) 119   119-52           3           pipe to valve           119-26               3                 tee to pipe                         Same line This line changes line number and size, but runs continuous with the 119    119-53         2           valve to pipe             119-26             3                 tee to pipe line of the weld identified as a similar weld 4
 
Enclosure Response   to Request   for   Additional     Information   - Relief   Request 63   - Unit 3 Impractical   Examinations for the Third 10-Year Inservice Inspection Interval Table 2B - SURRlemental Information for Category C-F-1, Item CS.11 Welds Typical                 Design Conditions     Operating Conditions ISI              Pipe                                                      Area Dose      Leakage Weld               Filler Material Specifications Zone             Diam.                                     Plant Location                              Pressure      Temp. Pressure      Temp.
No.              ASME / AWS / F No. / Process                           Rates     Monitoring No.           (inches)                                                       (mR/hr)                   (psi)     (Deg. F)     (psi)     (Deg. F)
Auxiliary Bldg. -
SFA-5.9 / ER316 / F6 / GTAW     Shutdown Cooling    0.3 - 9.0      Yes        650          400        370          350 83 74-105       14 SFA-5.4 / ER316 / F5 / SMAW       HTX'A' Room Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW                         0.2 - 22.0      Yes        100          350        100          120 90  85-9         24                                     East Mechanical SFA-5.4 / ER316 / F5 / SMAW     Penetration Room Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW      East Mechanical   0.2 - 22.0       Yes         100         350       100         120 90  85-11        24 SFA-5.4 / ER316 / F5 / SMAW    Penetration Room Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW      West Mechanical   0.2 - 11.0       Yes         650          550        370          350 91    76-7        12 SFA-5.4 / ER316 / F5 / SMAW    Penetration Room Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW      West Mechanical   0.2 - 11.0       Yes         650         550       370         350 91    77-7        12 SFA-5.4 / ER316 / F5 / SMAW    Penetration Room Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW      West Mechanical   0.2 - 11.0       Yes         650         550       370         350 91  77-14        12 SFA-5.4 / ER316 / F5 / SMAW    Penetration Room Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW      West Mechanical   0.2 - 11.0       Yes       2485          650       370         350 91  77-16        12 SFA-5.4 / ER316 / F5 / SMAW    Penetration Room Containment -
SFA-5.9 / ER316 / F6 / GTAW      103' el. Outside      <0.2         Yes       2485         650       370         350 98  78-47        12 SFA-5.4 / ER316 / F5 / SMAW          Bio-Shield Containment - 90' SFA-5.9 / ER316 / F6 / GTAW      el. Outside Bio-    0.5 - 4.0      Yes         485          400        370         350 101  71-123        16 SFA-5.4 / ER316 / F5 / SMAW Shield Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW       Low Pressure                                  100          350        100          120 104  85-46        20                                                        0.4 - 33.0       Yes SFA-5.4 / ER316 / F5 / SMAW     Safety Injection Pump Room 42' el.
Auxiliary Bldg -
SFA-5.9 / ER316 / F6 / GTAW       Low Pressure                                 100          350        100          120 104  85-47        20                                                        0.4 - 33.0       Yes SFA-5.4 / ER316 / F5 / SMAW     Safety Injection Pump Room 42' el.
5
 
Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 3B - SUQQlemental Information for Category C-F-1, Item CS.21 Welds Operating Design Conditions Conditions Pipe                                                        Typical Area Dose    Leakage
!SI Zone  Weld            Filler Material Specifications Diam.                                    Plant Location No. No.           ASME / AWS / F No./ Process                            Rates (mR/hr)      Monitoring Pressure  Temp. Pressure    Temp.
(inches)                                                                                        (psi)  (Deg. F)    (psi)    (Deg. F)
Auxiliary Bldg - West SFA-5.9 / ER316 / F6 / GTAW                              0.2 - 11.0        Yes      2050      350      1822        350 110  110-17    2                                        Mechanical SFA-5.4 / ER316 / F5 / SMAW      Penetration Room Auxiliary Bldg - West SFA-5.9 / ER316 / F6 / GTAW          Mechanical          0.2 - 11.0        Yes      2485      650      1822        350 110  110-52    2 SFA-5.4 / ER316 / F5 / SMAW      Penetration Room Auxiliary Bldg - West SFA-5.9 / ER316 / F6 / GTAW          Mechanical         0.2 - 11.0         Yes       2485      650      1822       350 111  111-34    4 SFA-5.4 / ER316 / F5 / SMAW     Penetration Room Auxiliary Bldg - East SFA-5.9 / ER316 / F6 / GTAW                               0.2 - 22          Yes      2485       650     1822       350 113  113-28      2                                        Mechanical SFA-5.4 / ER316 / F5 / SMAW     Penetration Room Containment - 90' SFA-5.9 / ER316 / F6 / GTAW                               0.5 - 4.0         Yes       2485       650     1822       350 118  118-46      3                                    el. Outside Bio-SFA-5.4 / ER316 / F5 / SMAW             Shield Containment - 90' SFA-5.9 / ER316 / F6 / GTAW       el. Outside Bio-         0.5 - 4.0        Yes       2485       650     1822         350 118  118-49      3 SFA-5.4 / ER316 / F5 / SMAW             Shield Containment - 90' SFA-5.9 / ER316 / F6 / GTAW       el. Outside Bio-         0.5 - 4.0         Yes       2485       650     1822         350 119  119-52      3 SFA-5.4 / ER316 / F5 / SMAW             Shield Auxiliary Bldg - CH SFA-5.9 / ER316 / F6 / GTAW     Pump Valve Gallery        0.2 - 2.0         Yes       2485       650     1822         350 119   119-53     2 SFA-5.4 / ER316 / F5 / SMAW             100' el.
6}}

Latest revision as of 18:12, 19 October 2019

Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval
ML19165A140
Person / Time
Site: Palo Verde Arizona Public Service icon.png
Issue date: 06/14/2019
From: Lacal M
Arizona Public Service Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
102-07929-MLL/MDD
Download: ML19165A140 (8)
v • d • e


Text

10 CFR 50.SSa MARIA L. LACAL Se ni or Vi ce Preside nt, Nuclea r Reg ul atory & Ove rsight Palo Verde 102-07929-MLL/MDD Nuclear Generating Station June 14, 2019 P.O. Box 52034 Phoeni x, AZ 85072 U. S. Nuclear Regulatory Commission Mai l Station 7605 ATIN: Document Control Desk Tel 623.393.649 1 Washington, DC 20555-0001

Dear Sirs:

Subject:

Palo Verde Nuclear Generating Station Unit 3 Docket No. STN 50-530 Renewed Operating License No. NPF-74 Response to Request for Additional Information - Relief Request 63 -

Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval By letter number 102-07851, dated January 10, 2019 (Agencywide Documents Access and Management System Accession No. ML19010A307), Arizona Public Service Company (APS) submitted relief request 63 in accordance with 10 CFR 50.55a(g)(S)(iii). Certain ultrasonic examinations of welds identified in letter 102-07851 required by Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, sub-articles IWB-2500 and IWC-2500 have been determined to be impractical for Unit 3 third 10-Year inservice inspection interval.

The Nuclear Regulatory Commission (NRC) staff has requested additional information (RAI) to complete their review with regard to ASME Code class 2 components. A clarifying phone call was held between NRC and APS on April 4, 2019, to discuss the additional information needed. The APS response to the request for additional information is provided in the enclosure to this letter. The response due date was June 7, 2019. APS has granted a week extension to June 14, 2019 for the response during a call with the NRC project manager on June 5, 2019 .

No new commitments are being made in this submittal. If you have any questions about this request, please contact Michael D. Dilorenzo, Department Leader of Nuclear Regulatory Affairs, at (623) 393 - 3945 .

Sincerely,

~

  • cxf~

MLL/MDD

Enclosure:

Response to Request for Additional Information - Relief Request 63, Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval cc: S. A. Morris NRC Region IV Regional Administrator S. P. Lingam NRC NRR Project Manager for PVNGS C. A. Pea body NRC Senior Resident Inspector for PVNGS A member of the STARS Alliance LLC Callaway

  • Diablo Canyon
  • Palo Verde
  • Wo l f Cr e ek

Enclosure Response to Request for Additional Information Relief Request 63 Unit 3 Impractical Examination s for the Third 10-Year Inservice Inspection Interval

Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval 10 CFR 50.SSa Request Number 63 Response to Request for Additional Information Unit 3 Inservice Inspection Impracticality Third 10-Year Inservice Inspection Interval By letter number 102-07851, dated January 10, 2019, Agencywide Documents Access and Management System Accession No. ML19010A307, Arizona Public Service Company (APS) submitted relief request 63 in accordance with 10 CFR 50.55a(g)(S)(iii). Certain ultrasonic examinations of welds identified in letter 102-07851 required by Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, sub-articles IWB-2500 and IWC-2500 have been determined to be impractical for Unit 3 third 10-Year inservice inspection interval (ISi).

The Nuclear Regulatory Commission (NRC) staff has reviewed RR 63 and requested additional information in order to complete the review with regard to ASME Code Class 2 components. A clarifying phone call was held between NRC and APS on April 4, 2019, to discuss the additional information needed. The APS response is provided after each NRC request for additional information.

NRC MPHB-RAl-1:

Please discuss whether, as a substitute, examinations were performed on similar welds in the same piping systems that essentially 100 percent coverage could be achieved.

APS Response:

There are no examinations that can formally be credited in place of the limited examinations identified in Tables 2 and 3 of Relief Request 63. However, other ultrasonic (UT) examinations were completed on similar welds of the same piping systems, often on the same lines, that have essentially 100 percent coverage and no rejectable indications. Those completed UT examinations which correspond to the limited examinations within the same piping systems are referenced in Tables 2A and 3A.

NRC MPHB-RAl-2:

One of the notes associated with Tables 2 and 3 of the relief request states that " ... All piping material for C-F-1 welds in the Table above are Austenitic Stainless Steel ... " Please discuss the exact weld metal (material specification) used in the welds of Tables 2 and 3 APS Response:

Tables 2B and 3B have been provided as supplemental information to Tables 2 and 3 that were originally submitted as part of Relief Request 63. Tables 2B and 3B provide two weld material specifications for each weld. Specification "SFA-5.9 / ER316 / F6 / GTAW" was used for the initial passes (root) of each weld. The balance of each weld was completed using either SFA-5.9 / ER316 / F6 / GTAW or SFA-5.4 / ER316 / F5 / SMAW.

Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval NRC MPH8-RAl-3:

Tables 2 and 3 of the relief request show that welds are located in various zones. Please describe the location of these zones (inside or outside of the containment), how the zones are designated, operational leakage monitoring and radiation dose, if any, in these zones.

APS Response:

The location of the applicable zones are provided in Tables 28 and 38. The ISi program is subdivided into zones for convenience of program management. Each zone may represent a room within the plant or a portion of a system separated by building penetrations, code classification boundaries, or otherwise. The Unit 3 Inservice Inspection program currently defines zones 1 through 6, and zones 16 through 129. Zones 7 through 15 are not currently used as zone designations within the program. The physical locations of each weld have been provided in Tables 28 and 38, however the piping/line description resides in Tables 2 and 3 of Relief Request 63. Leak detection/monitoring is provided for the areas and/or rooms and includes control room indication. Dose rates for each room have been provided in Tables 28 and 38 as averages during the previous 5 years.

NRC MPH8-RAl-4:

Please discuss the design and operating conditions (e.g., temperature and pressure) of the welds in Tables 2 and 3 of the relief request.

APS Response:

Design and operating conditions (e.g., temperature and pressure) of the welds identified in Tables 2 and 3 have been provided in Tables 28 and 38.

2

Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 2A - SUQQlemental Information for Category C-F-1, Item CS.11 Welds Limited Exam Weld Information Similar Code Required Volume Weld Information ISI Zone Weld No.(s) Comments Pipe No. Pipe Diam. Credited with Weld Configuration Weld No. Weld Configuration Diam.

(inches) Code Required (in direction of flow)

(inches)

Volume 83 74-105 14 sweepolet to pipe 74-115 14 pipe to elbow Same line 90 85-9 24 flange to pipe 85-29 24 pipe to elbow Same line 90 85-11 24 pipe to valve 85-29 24 pipe to elbow Same line pipe to elbow (76-8),

91 76-7 12 orifice to pipe 76-8, 76-2 12 Same line reducer to pipe (76-2) 91 77-7 12 orifice to pipe 77-8 12 pipe to elbow Same line 91 77-14 12 pipe to valve 77-8 12 pipe to elbow Same line 91 77-16 12 valve to pipe 77-8 12 pipe to elbow Same line elbow to pipe (78-45),

78-45, 78-44, Same line 98 78-47 12 pipe to valve 12 pipe to elbow (78-44),

78-43 elbow to pipe (78-43) pipe to elbow (22-21),

22-21, 22-17, 101 71-123 16 valve to pipe 16 pipe to elbow (22-17), Same line 22-14 pipe to elbow (22-14) 104 85-46 20 pipe to valve 85-44 20 elbow to pipe Same line 104 85-47 20 valve to pipe 85-44 20 elbow to pipe Same line 3

Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 3A - Sui:;1i:;1lemental Information for Category C-F-1, Item CS.21 Welds Limited Exam Weld Information Similar Code Required Volume Weld Information

!SI Zone Weld No.(s)

Pipe Comments No. Pipe Diam. Credited with Weld Configuration Weld No. Weld Configuration Diam.

(inches) Code Required (in direction of flow)

(inches)

Volume This line changes line number and tee to pipe (110-25),

110-25, 110-33, size, but runs continuous with the 110 110-17 2 pipe to valve 4 orifice to pipe (110-33),

110-34 line of the three welds identified as pipe to elbow (110-34) similar welds This line changes line number and tee to pipe (110-25),

110-25, 110-33, size, but runs continuous with the 110 110-52 2 pipe to tee 4 orifice to pipe (110-33),

110-34 line of the three welds identified as pipe to elbow (110-34) similar welds This line changes line number and size, but runs continuous with the 111 111-34 4 pipe to orifice 111-21 2 pipe to elbow line of the weld identified as a similar weld This line changes line number and 4 (113-2), elbow to pipe (113-2), size, but runs continuous with the 113 113-28 2 valve to pipe 113-2, 113-9 line of the two welds identified as 2 (113-9) elbow to pipe (113-9) similar welds Pipe to elbow (118-47),

118 118-46 3 penetration to pipe 118-47, 118-48 3 Same line elbow to pipe (118-48)

Pipe to elbow (118-47),

118 118-49 3 pipe to valve 118-47, 118-48 3 Same line elbow to pipe (118-48) 119 119-52 3 pipe to valve 119-26 3 tee to pipe Same line This line changes line number and size, but runs continuous with the 119 119-53 2 valve to pipe 119-26 3 tee to pipe line of the weld identified as a similar weld 4

Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 2B - SURRlemental Information for Category C-F-1, Item CS.11 Welds Typical Design Conditions Operating Conditions ISI Pipe Area Dose Leakage Weld Filler Material Specifications Zone Diam. Plant Location Pressure Temp. Pressure Temp.

No. ASME / AWS / F No. / Process Rates Monitoring No. (inches) (mR/hr) (psi) (Deg. F) (psi) (Deg. F)

Auxiliary Bldg. -

SFA-5.9 / ER316 / F6 / GTAW Shutdown Cooling 0.3 - 9.0 Yes 650 400 370 350 83 74-105 14 SFA-5.4 / ER316 / F5 / SMAW HTX'A' Room Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW 0.2 - 22.0 Yes 100 350 100 120 90 85-9 24 East Mechanical SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW East Mechanical 0.2 - 22.0 Yes 100 350 100 120 90 85-11 24 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW West Mechanical 0.2 - 11.0 Yes 650 550 370 350 91 76-7 12 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW West Mechanical 0.2 - 11.0 Yes 650 550 370 350 91 77-7 12 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW West Mechanical 0.2 - 11.0 Yes 650 550 370 350 91 77-14 12 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW West Mechanical 0.2 - 11.0 Yes 2485 650 370 350 91 77-16 12 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Containment -

SFA-5.9 / ER316 / F6 / GTAW 103' el. Outside <0.2 Yes 2485 650 370 350 98 78-47 12 SFA-5.4 / ER316 / F5 / SMAW Bio-Shield Containment - 90' SFA-5.9 / ER316 / F6 / GTAW el. Outside Bio- 0.5 - 4.0 Yes 485 400 370 350 101 71-123 16 SFA-5.4 / ER316 / F5 / SMAW Shield Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW Low Pressure 100 350 100 120 104 85-46 20 0.4 - 33.0 Yes SFA-5.4 / ER316 / F5 / SMAW Safety Injection Pump Room 42' el.

Auxiliary Bldg -

SFA-5.9 / ER316 / F6 / GTAW Low Pressure 100 350 100 120 104 85-47 20 0.4 - 33.0 Yes SFA-5.4 / ER316 / F5 / SMAW Safety Injection Pump Room 42' el.

5

Enclosure Response to Request for Additional Information - Relief Request 63 - Unit 3 Impractical Examinations for the Third 10-Year Inservice Inspection Interval Table 3B - SUQQlemental Information for Category C-F-1, Item CS.21 Welds Operating Design Conditions Conditions Pipe Typical Area Dose Leakage

!SI Zone Weld Filler Material Specifications Diam. Plant Location No. No. ASME / AWS / F No./ Process Rates (mR/hr) Monitoring Pressure Temp. Pressure Temp.

(inches) (psi) (Deg. F) (psi) (Deg. F)

Auxiliary Bldg - West SFA-5.9 / ER316 / F6 / GTAW 0.2 - 11.0 Yes 2050 350 1822 350 110 110-17 2 Mechanical SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg - West SFA-5.9 / ER316 / F6 / GTAW Mechanical 0.2 - 11.0 Yes 2485 650 1822 350 110 110-52 2 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg - West SFA-5.9 / ER316 / F6 / GTAW Mechanical 0.2 - 11.0 Yes 2485 650 1822 350 111 111-34 4 SFA-5.4 / ER316 / F5 / SMAW Penetration Room Auxiliary Bldg - East SFA-5.9 / ER316 / F6 / GTAW 0.2 - 22 Yes 2485 650 1822 350 113 113-28 2 Mechanical SFA-5.4 / ER316 / F5 / SMAW Penetration Room Containment - 90' SFA-5.9 / ER316 / F6 / GTAW 0.5 - 4.0 Yes 2485 650 1822 350 118 118-46 3 el. Outside Bio-SFA-5.4 / ER316 / F5 / SMAW Shield Containment - 90' SFA-5.9 / ER316 / F6 / GTAW el. Outside Bio- 0.5 - 4.0 Yes 2485 650 1822 350 118 118-49 3 SFA-5.4 / ER316 / F5 / SMAW Shield Containment - 90' SFA-5.9 / ER316 / F6 / GTAW el. Outside Bio- 0.5 - 4.0 Yes 2485 650 1822 350 119 119-52 3 SFA-5.4 / ER316 / F5 / SMAW Shield Auxiliary Bldg - CH SFA-5.9 / ER316 / F6 / GTAW Pump Valve Gallery 0.2 - 2.0 Yes 2485 650 1822 350 119 119-53 2 SFA-5.4 / ER316 / F5 / SMAW 100' el.

6

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