ML20035F953

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Forwards ISI Program Relief Request NDE-19 from Certain Requirements of ASME Section XI Associated W/Partial Exams Conducted for Facilities
ML20035F953
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 04/19/1993
From: Stewart W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
93-196, NUDOCS 9304230120
Download: ML20035F953 (47)
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{{#Wiki_filter:- s i VInGINIA ELecrnic AND Powen COMPANY RICHMOND. VIRGINI A 23261 April 19, 1993 United States Nuclear Regulatory Commission Serial No. 93-196 Attention: Document Control Desk NL&P/EJW Washington, D.C. 20555 Docket Nos. 50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen: VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 INSERVICE INSPECTION PROGRAM RELIEF REQUESTS North Anna Power Station Unit 1 is presently in the second period of the second ten-year interval. North Anna Unit 1 examinations have been conducted to the requirements of the 1983 Edition and Summer 1983 Addenda of ASME Section XI. North Anna Unit 2 is currently in the first period of its second ten year interval. North Anna Unit 2 examinations have been conducted to the requirements of the 1986 Edition of ASME Section XI. Pursuant to 10 CFR 50.55a (g) 5, relief is requested from certain requirements of the ASME Section XI associated with partial examinations conducted for both North Anna Units 1 and 2. Relief Request NDE-19 (attached) for both units has been provided detailing the basis of this relief. If you have any questions concerning these requests, please contact us. Very truly yours, h (c e W. L. Stewart Senior Vice President - Nuclear Enclosures ) \\ / 230012 8 9304230120 930419 PDR ADOCK 05000338 l 4 G PDR

f .o e e oc: United States Nuclear Regulatory Commission Region 11 101 Marietta Street, N.W. Suite 2900. Atlanta, GA 30323 Mr. M. S. Lesser NRC Senior Resident inspector North Anna Power Station 3

o Serial No. 93-196 NORTH ANNA UNIT 1 RELIFiF REQUEST NDE-19 1. IDENTIFICATION OF COMPONENTS Mark / Weld # Line # Drawinu # Class ) 1 11715-WMKS-RC-R-1.2 1 14 4"-RC-15-1502-01 11715-WMKS-RC-E-2 1 4 31"-RC-2-2501-01 11715-WMKS-0109E-1 1 4 5 31"-RC-2-2501 -01 11715-WMKS-0109E-1 1 SW-40 4"-RC-14-1502-01 11715-WMKS-0109E-2 1 72H 14"-RH-2-602-02 11715-WMKS-0113A-1 2 19H 6"-SI-133-1502-01 11715-WMKS-0103Y 2 64 14"-RH-3-602-02 11715-WMKS-0113A-2 2 11. IMPRACTICABLE CODE REQUIREMENTS The 1983 edition, Summer 1983 Addenda (inclusive) of ASME Section XI in Tables IWB-2500-1 and IWC-2500-1 does not allow any limitations to the required volumetric and surface examinations. Code Case N-460, Alternative Examination Coverage for Class 1 and Class 2 Welds, allows a reduction in coverage, if it is less than 10%. 111. BASIS FOR RELIEF The compor.ents listed above have been examined to the extent practical as required by the Code. Due to interferences of other components or weld joint geometry, the reduction in coverage for the listed components was greater than 10 % Tables NDE-19-1, 2, and 3 are provided detailing the limitations experienced. Amplifying sketches are also provided. Alternative components were not substituted for these examinations due to the mandatory selection requirements of the Code or because of the prorated selection criteria for piping in Category C-F-1 (Note 2 of Code Case N-408-1). IV. ALTERNATE PROVISIONS 11 is proposed that the examinations already complet0d at the reduced coverage be counted as meeting the Code requirements.

Table N D E-19-1 North Anna Unit 1 Examination Coverage Estimates (Vessel) Category B-A, item B1.40 Mark / Weld # Beam Anale Exam Area Scan Direction % Exam Reason For Partial Sketch # 1 0 Weld & Base 72 Proximity To Flange 1 (0 to 120 45 Weld 2 13 And Lifting Lug degrees) 45 Weld 5 97 Interference 45 Weld 7 99 45 Weld 8 99 60 Weld 2 7 60 Weld 5 98 60 Weld 7 99 60 Weld 8 99 45 & 60 Base 2 36 45 & 60 Base 5 91 45 & 60 Base 7 68 45 & 60 Base 8 68 UT Scan Direction Definitions 2 - Axial scan flange side of weld 5 - Axial scan head side of weld 7 - Circumferential scan, clockwise (looking down on head) 8 - Circumferential scan, counterclockwise (looking down on head)

~ 4 Table N D E-19-2 North Anna Unit 1 Examination Coverage Estimates (Vessels) Category B-D, item B3.110 Mark / Weld # Beam Anale Exam Area Scan Direction % Exam Reason For Partial Sketch # 14 0 Weld & Base 85 Nozzle Geometry, 2 45 Weld 2 90 Cladding Prevents 45 Weld 5 30 Extended V-path 45 Weld 7 100 45 Weld 8 100 60 Weld 2 95 60 Weld 5 20 60 Weld 7 100 60 Weld 8 100 45 & 60 Base 2 85 45 & 60 Base 5 40 45 & 60 Base 7 70 45 & 60 Base 8 70 UT Scan Direction Definitions 2 - Axialscan vessel side of weld 5 - Axial scan nozzle side of weld 7 - Circumferential scan, clo&.%e when looking in direction of isometric flow (weld count) 8 - Circumferential scan, counterclockwise when looking in direction of isometric flow (weld count)

Table N D E-19-3 North Anna Unit 1 Examination Coverage Estimates (Piping & Integral Attachments) UT Scan Coveraae % Surface Mark / Weld # Cateoorv Item # 2 5 Z B Coveraae % Hgason For Partial Sketch # 4 B-F B5.70 0 70 70 70 N/A Nozzia & Weld Crown 3 Geomet,y, Material Attenuation Prevents Extended V-path 5 B-F B5.70 70 0 70 70 N/A Nozzle & Weld crown '3 Geometry, Material Attenuation Prevents Extended V-path SW-40 B-J B9.31 91 91 @ 0 0 N/A Branch Connection Joint 4 Configuration 72H CC C3.20 N/A 50 Support Ceiling 5 Interference 19H CC C3.20 N/A 80 Support Configuration 6 64 C-F-1 C5.11 46' 46 100 100 N/A Extended V-path and 7 Smaller Transducer Used, Valve / Elbow Configuration & Weld Crown Umit Exam

  • - Extended V-path from 5 scan used.

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Serial No. 93-196 NORTH ANNA UNIT 2 RELIEF REQUEST NDE-19 i i 1. IDENTIFICATION OF COMPONENTS l i Mark / Weld # Line # Drawina # Class i 1 12050-WMKS-RC-R-1.2 1 10 6"-RC-439-1502-01 12050-WMKS-RC-E-2 1 4 31"-RC-402-2501-01 12050-Wf AKS-0109E-1 1 4 5 31"-RC-402-2501-Q1 12050-W MKS-0109E-1 1 SW-79 32"-SHP-401-601-02 12050-WMKS-0101 B 2 SW-80 32"-SH P-401-601-02 12050-WMKS-01018 2 SW-88 32"-SHP-401-601-02 12050-WMKS-01018 2 l SW-89 32"-SHP-401-601-02 12050-WMKS-0101 B 2 57H 16"-WFPD-424-601-02 12050-WMKS-0102A 2 i 59H 16"-WFPD-424-601-02 12050-WMKS-0102A 2 WS-1 12050-WMKS-CH-P-1 B 2 WS-2 12050-WMKS-CH-P-1 B 2 WS-3 12050-WMKS-CH-P-1 B 2 WS-4 12050-WMKS-CH-P-1 B 2 i 4A 12"-RS-408-153A-02 12050-WMKS-0104DA 2 SW-58 8"-OS-403-153A-03 12050-WMKS-0107D 2 SW-76 3"-SI-423-1502-02 12050-WMKS-0111 AAJ 2 22 3"-CH-402-1502-02 12050-WMKS-0111 AAM 2 l LS-5 12050-WMKS-SI-P-1 A 2 i 11. IMPRACTICABLE CODE REQUIREMENTS The 1986 Edition of ASME Section XI in tables IWB-2500-1 and IWC-2500-1 f does not allow any limitations to the required volumetric and surface examinations. Code Case N-460, Alternative Examination Coverage for Class 1 and Class 2 Welds, allows a reduction in coverage, if it is less than 10%. Ill. BASIS FOR RELIEF The components listed above have been examined to the extent practical as required by the Code. Due to interferences of other components or weld joint geometry, the reduction in coverage for the listed components was greater than 10%. Tables NDE-19-1, 2, 3a and 3b are provided detailing the limitations experienced. Amplifying sketches are also provided. Alternative components were not substituted for these examinations due to the mandatory selection requirements of the Code, or because of the prorated selection criteria for piping in Category C-F-1 (Note 2). IV. ALTERNATE PROVISIONS It is proposed that the examinations already completed at the reduced coverage be counted as meeting the Code requirements.

^ 1 Table N D E-19-1 North Anna Unit 2 Examination Coverage Estimates (Vessel) Category B-A, Item B1.40 Mark / Weld # Beam Anale Exam Area Scan Direction % Exam Reason For Partial Sketch # 1 0 Weld & Base 72 Proximity To Flange 1 (0 to 120 45 Weld 2 13 And Lifting Lug degrees) 45 Weld 5 97 Interference 45 Weld 7 99 45 Weld 8 99 60 Weld 2 7 60 W eld 5 98 60 Weld 7 99 60 Weld 8 99 45 & 60 Base 2 36 45 & 60 Base 5 91 45 & 60 Base 7 68 45 & 60 Base 8 68 UT Scan Direction Definitions 2 - Axial scan flange side of weld 5 - Axial scan head side of weld 7 - Circumferential scan, clockwise (looking down on head) 8 - Circumferential scan, counterclockwise (looking down on head)

i Table NDE-19-2 North Anna Unit 2 Examination Coverage Estimates (Vessels) Category B-D, item B3.110 Mark / Weld # Beam Anale Exam Area Scan Direction % Exam Reason For Partial Sketch # 10 0 Weld & Base 80 Nozzle Geometry, 2 45 W eld 2 85 Cladding Prevents 45 Weld 5 25 Extended V-path 45 Weld 7 100 45 Weld 8 100 60 Weld 2 90 60 Weld 5 15 60 W eld 7 100 60 W eld 8 100 45 & 60 Base 2 80 45 & 60 Base 5 35 45 & 60 Base 7 65 45 & 60 Base 8 65 UT Scan Direction Definitions 2 - Axial scan vessel side of weld 5 - Axial scan nozzle side of weld 7 - Circumferential scan, clockwise when looking in direction of isometric flow (weld count) 8 - Circumferential scan, counterclockwise when looking in direction of isomefric flow (weld count) i i

.=. Table NDE-19-3a North Anna Unit 2 Examination Coverage Estimates (Piping & Integral Attachments) UT Scan Coveraoe % Surface Mark / Weld # QalgggIy item # 2 5 7 D Coveraoe % Reason For Partial Sketch # 4 B-F B5.70 22 100 100 100 N/A Nozzle & Weld Crown 3 Geometry, Material Attenuation Prevents Extended V-path 5 B-F B5.70 100 22 100 100 N/A Nozzle & Weld crown 3 Geometry, Material Attenuation Prevents Extended V-path SW-79 C-C C3.20 N/A 50 Support Configuration 4 SW-80 C-C C3.20 N/A 50 Support Configuration 4 SW-88 C-C C3.20 N/A 50 Support Configuration 4 SW-89 C-C C3.20 N/A 50 Support Configuration 4 57H C-C C3.20 N/A 70 Weided Pipe Connection 5 Interface 59H C-C C3.20 N/A 70 Welded Pipe Connection 5 Interface WS-1 C-C C3.20 N/A 83 Support Configuration 6 W S-2 GC C3.20 N/A 78 Support Configuration 6 W S-3 GC C3.20 N/A 83 Support Configuration 6 W S-4 C-C C3.20 N/A 83 Support Configuration 6 UT Scan Direction Definitions 2 - Axial scan,180 degrees from isometric flow direction (weld count). 5 - Axial scan. the same direction as the isometric flow (weld count). 7 - Circumferential scan, clockwise rotation when viewing in the direction of isometric flow. 8 - Circumferential scan, counterclockwise rotation when viewing in the direction of isometric flow.

= . ~ i Table N D E-19-3b North Anna Unit 2 Examination Coverage Estimates (Piping & Integral Attachments) UT Scan Coverace % Surface Mark / Weld # Catcoorv Item # 2 5 Z B Coveraoe % Reason For Partial Sketch # 4A C-F-1 C5.11 76 76* 100 100 N/A Interference From Two Socket 7 Welds SW-58 C-F-1 C5.11 81 81* 90 90 N/A Interference From Adjacent 8 Socket Welds SW-76 C-F-1 C5.11 70 70* 100 100 N/A Interference From Adjacent 9 Socket We*,ds 22 C-F-1 C5.11 83 83* 100 100 N/A Valve To Tee Joint 10 Configuration LS-5 CG C6.10 N/A 78 Pump Mount Interference 11 - Extended V-path from 2 scan used. UT Scan Direction Definitions 2 - Axial scan,180 degrees from isometric flow direction (wek! count). 5 - Axial scan, the same direction as the isometric flow (weld count). 7 - Circumferential scan, clockwise rotation when viewing in the direction of isometric flow. 8 - Circumferential scan, counterclockwise rotation when viewing in the direction of isometric flow. l

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  1. fD8ENDdt4Df8tte INSERVICE INSPECTION ISOMETRIC CH SYS: 3'HPSI PUMP OISCHARGE LINES I:

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