ML20030A426
| ML20030A426 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 08/20/1973 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML20030A425 | List: |
| References | |
| SR-16, NUDOCS 8101090483 | |
| Download: ML20030A426 (6) | |
Text
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AUG 2 21973*
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CONSUMERS POWER COMPANY Big Rock Point Plant 50-155 SPECIAL REPORT NO 16 1973 In-Service Inspection
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Prepared by: Consumers Power Company pI1 August 20. 1973
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i SPECIAL REPORT NO 16 1973 In-Service Inspection Big Rock Point Plant 1-i The in-service inspection for 1973 vos conducted at the Big Rock Point Plant during the period of March 7 through March 22, 1973 1
l Inspections were conducted following the rules of the ASME Boiler and Pressure Vessel Code,Section XI,1971 edition with summer 1971 addenda and Section 9 0 of the Big Rock Point Technical Specifications.
Those areas examined during this 1973 in-service inspection included various components of the reactor pressure vessel, portions l
of the nuclear steam supply system, and portions of various support systems piping. Appendix A contains a summary listing of all components inspected at Big Rock Point.
Item numbers on Appendix A correspond to Table 9 3(a) of the Big Rock Point Technical Specifications.
Inspections we' "rformed by Southwest Research Institute (SWRI) personnel and aumers Power Company (CP Co) personnel. All inspection personnel were qualified in the NDT process utilized in ac-cordance with the requirements of Paragraph 15-203,Section XI of the 1971 ASME Boiler and Pressure Vessel Code. All components inspected were within applicable codes and standards. There were no items exam-ined that required repair.
During 1972 an attempt was made to examine the reactor vessel steam outlet nozzles using mechanized ultrasonic techniques. At that time, however, the examination had to be postponed because of access problems caused by the sparger ring nozzles. Modifications of the Big Rock Point Nozzle Inspection Device permitted a successful examination i
of these steam nozzle-to-shell welds and their nozzle-to-safe-end welds.
during this 1973 examination period.
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It is important to note that the Big Rock Point Plant was in I
service prior to Section XI of the ASME Boiler and Pressure Vessel Code being in effect; therefore, certain areas of the Big Rock Point Plant do not necessarily meet the access requirements of Section XI for 4
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examination purposes. Where practical, however, the selection of areas.
l of examination and techniques employed was based on the requirements of i
Section XI of. the 1971 ASME Boiler and Pressure Vessel Code. Although 4
this plant does present certain problems for examination, the examina-
'tions were performed whenever possible according to Appendix IX, Section
.i III, of the 1971 ASME Boiler. and Pressure Vessel Code.
The nondestructive testing was performed, using mechanized and manual ultrasonic (UT), visual'(VT), liquid penetrant (PT), and magnetic I
particle (MT) techniques. The various SWRI examinations were conducted in accordance with standard SWRI published procedures which are designed to conform to the requirements of the applicable sections of the ASME 1
Boiler and Pressure Vessel Code.
't External corrosion and pitting were discovered on a three-inch f
poison system ' elbow, a short section of pipe and a Chapman three-inch 1523V tilting disc check valve. However, further evaluation determined that no repairs were required. The pitting was determined to be external only and resulted from a small leak at the flanged joint of the above check valve which caused the insulation to become damp and accelerate corrosion.
The leaking flange was repaired and all insulation on this line at this elevation was removed to eliminate the corrodent.
The pitting was evaluated by means of pit depth measurements,.
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I ultrasonic thickness readings and radiographic exploration.
The three-inch piping ( ASTM A-106 Schedule 160 C.S. ) was determined to have suffi-cient vall thickness to exceed the requirements of USAS B31.1.0 - 1967 for system design temperature and pressure. Likewise, the three-inch Chapman 1523V tilting disc check valve was evaluated to determine that adequate wall thickness existed to exceed the requirements of ANSI B16.5 - 1968 for design temperature and pressure. These components I
will be inspected during the next in-service inspection.
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All records detailing procedures, results and personnel quali-fications for inspections perfonned by Consumers Power Company and i
Southwest Research Institute are on file at the Big Rock Point Plant.
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i APPENDIX A Summary of 1973 In-Service Inspection Big Rock Point Plant CItem No Components Inspected Inspected by Method 1.5 Control Rod Drive "J" Welds A-5, D-h, F-h SWRI UT 17 Primary Nozzle to Safe-End Welds:
SWRI UT Reactor Vessel Steam Outlet Nozzles N15, N16, N17, N18, N19, N20 Nozzle to Shell Weld and Nozzle to Safe-End Weld g
1.8 Closure Studs 1-9, 11-15 SWRI VI, UT Closure Nuts 1-9, 11-15 SWRI VT, UT 1.9 Ligaments Between Threaded Stud Hnlas Adjacent to Studs 1-9 and 11-15 SWRI UT 31 Longitudinal and Circumferential Welds for -
a.
Clean-Up Demineralizer Tank:
SWRI (1) Middle Circumferential Weld VT, UT (2) Lower Vertical Weld VT, UT b.
Emergency Condenser South Tube Bundle - Upler Half of End Plate Connection Weld SRWI VT, UT 32 Nimary Nozzle to Vessel Head Welds for:
a.
Clean-Up Demineralizer (1) 3" Inlet Nozzle SWRI VT, UT (2) 3" Outlet Nozzle SWRI YP, UT b.
Emergency Condenser (1) 6" Nozzle to Tube Shell SWRI VT, UT 3.6 Clean-Up Demineralizer Welded Supports Legs 1, 2, 3 Attachment Welds SWRI VT, UT CCorresponds to Item No in Table 9 3(a) of the Big Rock Point Plant Technical Specifications SWRI - Southwest Research Institute UT
- Ultrasonic Testing VT
- Visual Testing
2 APPENDIX A (Contd)
CItem No Components Inspected Inspected by Method 4.1 Safe-Ends or Dissimilar Metal Welds:
a.
Nc30 to Pipe 1/2" Socket Weld - Weld No CRD-1A SWRI VT, PT b.
RD-19 to Pipe - 2" Socket Weld - Weld No CRD-17A SWRI VT, PT c.
NC-33 to Pipe - 3/h" Socket Weld - Weld No.CRD-15A SWRI VT, PT k.2 Circumferential Pipe Welds:
Clean-Up System (RCS) - Welds No 108, 108A, 109, 109A, 110, 110A, e
a.
120, 121, 122, 122A, 123, 124, 125, 126, 125, 129,330, 131, 132, 152 SWRI VT, UT b.
Shutdown System (SCS) - Welds No 6, 7, 3h, 35 SWRI VT, UT Main Recirculation Syster (PCS) - Welds No 9, 10, 39, 40 SWRI VT, UT c.
Cross-Connect Line - We:.as No 6h, 65, 67 SWRI VT, UT d.
Core Spray System - Welds No 5, 6, 7, 8, 9 SWRI VT, UT e.
Redundant Core Spray System - Welds No 5, 6, 7, 8, 9, 10, 11, 12 SWRI VT, UT, PT (Weld 9)
Liquid Poison System (LPS) - Weld No 20, 21, 22 SWRI VT, UT g.
Emergency Condenser System (ECS) - 6" Nozzle Tube to Shell, 13 SWRI VT, UT h.5 Integrally Welded Pipe Supports:
Main Recirculation System - Lugs 'No 1, 2 SWRI VT, UT a.
k.6 Piping Supports and Hangers:
Main Recirculation System - H1A to H6A, H8A to H11A, H13A to H1hA, a.
H19A, H1B to HkB, H6B to H10B, H12B to H1hB, H195, n20 CP Co VT b.
Shutdown System - RSD 16, RSD 17, RSD 18 CP Co VT c.
Main Steam System - MS-8, MS-9, MS-10, MS-11 CP Co VT d.
Feed-Water System - RF-10, RF-9, RF-8, RF-7, RF-6 CP Co VT h.8 Socket Welds 2" or Greater:
a.
Control Rod Drive System - Welds No 22, 23, 24, 25, 26, 27 SWRI VT, MT CCorresponds to Item No in Table 9 3(a) of the Big Rock Point Plant Technical Specifications SWRI - Southwest Research Institute VT - Visual Testing CP Co - Consumers Power Company PT - Liquid Penetrant Testing UT
- Ultrasonic Testing MT - Magnetic Particle Testing i
3 APPENDIX A (Contd)
OItem No Components Inspected Inspected by Method 5.2 Pump Casings:
.a.
Main Recirculation Pump No 1 SWRI VT b.
Flange Ligaments No 1 Recirculation Pump SWRI VT, UT 55 Pressure Retaining Bolting:
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a.
Main Recirculation Pump No 1 SWRI VT, UT, MT 6.2 Valve Bodies:
a.
Emergency Condenser Inlet Valve MO-7052 CP Co VT b.
Steam Drum Relief' Valve No 5045 CP Co VT, PT 6.5 Pressure Retaining Bolting:
a.
Steam Drum Relief Valve Bolts Position No 3 CP Co VT CCorresponds to I'em No in Table 9.3(a) of the Big Rock Point Plant Technical Specifications SWRI - Southwest Research Institute VT - Visual Testing CP Co - Consumers Power Company PT - Liquid Penetrant Testing UT
- Ultrasonic Testing MT - Magnetic Particle Testing
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