In-Service Inspection of Nuclear Power Plants - gnssn - International ...
In-Service Inspection of Nuclear Power Plants - gnssn - International ...
In-Service Inspection of Nuclear Power Plants - gnssn - International ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
This publication is no longer valid<br />
Please see http://www-ns.iaea.org/standards/<br />
COMPONENT TO 8E EXAMINED:<br />
Pressure retaining welds in vessel.<br />
AREAS SUBJECT TO EXAMINATIONS:<br />
CLASS I CODE CATEGORY 6-8<br />
Longitudinal and circumferential welds in vessel shell ana meridional and<br />
circumferential welds in vessel heads. This includes weld metal and case<br />
metal for one plate thickness beyond the edge <strong>of</strong> weld.<br />
EXTENT AND FREQUENCY OF EXAMINATIONS:<br />
The required examinations performed during each inspection interval shall<br />
cover at least 10X <strong>of</strong> the length <strong>of</strong> each longitudinal shell weia and<br />
meridional head weld and 5% <strong>of</strong> the length <strong>of</strong> each circumferential shell and<br />
head weld. For welds on the reactor vessel, examinations may be "performed at<br />
or near the end <strong>of</strong> each inspection interval.<br />
METHOD OF EXAMINATION!S):<br />
Ultrasonic<br />
PROCEDURES:<br />
MIUV-S752<br />
COMMENTS:<br />
The following welds were examined during PSI: Top head dollar weld segment<br />
welds in top head, outer segment welds in bottom head, outer ring to inner<br />
ring weld in bottom head, vertical welds in Course 4, and circumferential weld<br />
between Course 3 and Course 4. No indications requiring evaluation in<br />
accordance with IS-311 <strong>of</strong> ASME Section XI were observed. Oue to<br />
nonaccessibility <strong>of</strong> the majority <strong>of</strong> Category B-B welds, the entire ISI<br />
requirements for circumferential and longitudinal welds will be accomplished<br />
on the accessible welds.<br />
SCHEDULED THIS<br />
TOTAL MELDS TOTAL ACCESSIBLE WELD INSPECTION INTERVAL<br />
Circ. 3293" circ. 1359" Circ. 68"<br />
mer. 1514" mer. 1208" mer. 123"<br />
long. 900" long. 450" long. 45"<br />
Vertical Seam welds VLC-88-1,2 and 3 receive best effort examinations at the<br />
same time VC8-88-4 is examined and are recorded on trie same data sheet<br />
delineating the extent to which the examination <strong>of</strong> VLC-88-1,2 and 3 were<br />
performed.<br />
During the ex ami nation <strong>of</strong> the vessel support skirt weld HNC-C1-1, 2, and 3,<br />
the bottom head welds HM8-8B-1,2,3,4,5, and 6 receive examinations from the<br />
support skirt weld HNC-Cl-1,2, and 3 to the bottom head circumferential weid<br />
HMC-8B-1 to the extent possible.<br />
67
Change language