ML021360024
| ML021360024 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 05/14/2002 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| TAC MB4080 | |
| Download: ML021360024 (2) | |
Text
Table Partial 1 North Anna Unit 2 Reactor Vessel Outlet Nozzle to Shell Welds 10, 12, and 14 Aggregate Coverage Percentage Estimates Category B-D, Item B-3.90 Weld Volume Weld Volume 100 60.5 100 60.5 100 100 Weld = 1(
Weld Volume 100 100 10 Degrees 45 Degrees 50 Degrees 60 Degrees 70 De grees 80 De grees 100 60.5 1 00 60.5 100 60.5 100 60.5 100 60.5 100 60.5
)0%
Volume = 60.5%
Combined Average 80.25%
1 The bore exams provide 100% coverage for the axial scan direction, which accounts for 50% of the required scans.
These bore exams combined with the transverse scan average of 60.5% results in a combined coverage for the volume of 80.25%. Weld coverage of 100% was calculated separately.
Beam Direction CCW CW Bore Axial Average of All Weld Volume I
Sketch Partial 1 North Anna Unit 2 Reactor Vessel Outlet Nozzle to Shell Welds 10, 12, and 14 NOZZLE 0', 180' VOLUME EXAMINED -
69/
NOZZLE BOSS vEXAM VOLUNE