In-Service Inspection of Nuclear Power Plants - gnssn - International ...

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ATTACHMENT "E * I SWI-3 6
ECLTING EXAMINATION CHECK OFF LIST I Page 1 of 3
1. The ISI Examiner snail have sufficient light to resolve
a 1/32' inch black line on *n 18% neutral grey card at
a distance no greater than 24 inches with an eye angle
not less than 30 degrees from the surface to be examined.
2. For bolting greater than 2" ir. diameter, the ISI Examiner
shall visually examine washers on the reactor vessel and
nuts and washers on piping, pumps and valves In place or
when removed. Bushings and flange surfaces shall be examined
when the connection is disassembled. Flange aurfaces
shall only be examined foe piping, pumps and valves and
shall be limited to a 1" annular surface surrounding each
stud.
3. For bolting 2' and less in diameter, the bolts, studs and
nuts shall be examined in place or when removed, The bolting
associated with CRE housings shall be examined only
when disassembled.
The belting described in steps 2 and 3 shall be examined
for deficiencies as listed on data sheet. If a deficiency
exists, check appropriate box. The following conditions
shall be considered unacceptable if detected by the
Examiner:
a) crack-lilte indications that exceed 1/4* in length
non-axially or 1" in length axially;
a) more than one deformed or sheared thread in the zone
of thread engagement of bolts, studs, or nuts;
c) localized general corrosion that reduces the bolt or
stjd cross-sectional area by more tnan 5%;
d) bending, twisting, or deformation of bolts or studs
to the extent that assembly or disassembly is impaired;
e) missing or loose bolts, studs, nuts, or washers;
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