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The examination requirements for containment surfaces and pressure retaining components in nuclear power plants. It covers various examination categories, such as e-a for containment surfaces, e-c for containment surfaces requiring augmented examination, e-f for dissimilar metal welds, and e-p for all pressure retaining components. The document specifies the extent and frequency of examinations, acceptance criteria, and inspection intervals for each category. It also notes that leakage tests may be deferred until the next scheduled leakage test in some cases.
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Inspection Period, Minimum Maximum Inspection Calendar Years of Examinations Examinations Interval Plant Service Completed, % Credited, %
1st 3 100 100
2nd 7 33 67 10 100 100
3rd 13 16 34 17 40 50 20 66 75 23 100 100
4th 27 8 16 30 25 34 33 50 67 37 75 100 40 100...
Inspection Period, Minimum Maximum Inspection Calendar Years of Examinations Examinations Interval Plant Service Completed, % Credited, %
1st 3 16 34 7 50 67 10 100 100
Successive 3 16 34 7 50 67 10 100 100
Extent and Frequency of Examination
Examination
1
1st
Deferral of
Item
Parts
Requirements /
Examination
Acceptance
Inspection
Successive
Inspection to
No.
Examined
Fig. No.
Method
Standard
Interval
Inspection Intervals
End of Interval
9
Containment Vessel
Pressure Retaining Boundary
Accessible Surface Areas
2,3,
General Visual
(^7)
Not permissible
Prior to each
Prior to each
Type A test
8
Type A test
8
Accessible Surface Areas
2,4,
Visual, VTM-
End of interval
End of interval
Vent System
Visual, VTM-
Accessible Surface Areas
2,4,5,
End of interval
End of interval
NOTES:(1) Examination may be made from either the inside or outside surface.(2) Examination shall include structures that are parts of reinforcing structure, such as stiffening rings, manhole frames, and reinforcement around openings.(3) Not including surface areas that are submerged or insulated.(4) Including the wetted surfaces of submerged areas and the portions of insulated surface areas that are necessary to meet the requirements of IME-1231(a)(4).(5) Examination shall include the attachment welds between structural attachments and the pressure retaining boundary or reinforcing structure, except for nonstructural and temporary
attachments as defined in NE-4435 and minor permanent attachments as defined in CC-4543.4. Examination shall include the weld metal and the base metal for
(^1)
in. beyond the
edge of the weld. (6) Includes flow channeling devices within containment vessels.(7) Refer to IME-3510.1 for General Visual examination method requirements.(8) Refer to IME-5220 for test requirements.(9) Deferral of inspection is not permissible in the 4th and successive inspection intervals.
Extent and Frequency of Examination
Examination
1st
Deferral of
Item
Parts
Requirements /
Examination
Acceptance
Inspection
Successive
Inspection to
No.
Examined
Fig. No.
Method
Standard
Interval
Inspection Intervals
4
End of Interval
7
Containment Penetration Welds
3,
Visual, VTM-
25% of the total num-
25% of the total num-
Permissible
ber of welds
1,
ber of welds
1,
Longitudinal
Circumferential
Flued Head and Bellows Seal Circumferential
Welds Joined to the Penetration
Flange Welds (Category C)
6
Visual, VTM-
25% of the total num-
25% of the total num-
Permissible
ber of welds
1,
ber of welds
1,
Nozzle-to-Shell Welds (Category D)
6
Visual, VTM-
25% of the total num-
25% of the total num-
Permissible
ber of welds
1,
ber of welds
1,
NOTES:(1) Examination shall include the weld metal and the base metal for
(^1)
in. beyond the edge of the weld.
(2) Welds shall be randomly selected throughout the containment and representative of the type of welds described by each item number.(3) Examination shall include welds made in accordance with Section III, Class MC, including those Class MC welds shown in Figs.
NE-1120-1 and NE-1132-1. (4) Different welds shall be selected for examination each inspection interval.(5) Includes only those welds subject to cyclic loads and thermal stress during normal plant operation.(6) Welded joint categories are as defined in NE-3351 for Class MC and CC-3840 for Class CC.(7) Deferral of inspection is not permissible in the 4th and successive inspection intervals.
Extent and Frequency of Examination
Examination
1st
Deferral of
Item
Parts
Requirements /
Examination
Acceptance
Inspection
Successive
Inspection to
No.
Examined
1
Fig. No.
Method
Standard
Interval
Inspection Intervals
End of Interval
5
Seals
1
Visual, VTM-
100% of each item
100% of each item
Not permissible
Gaskets
1
Visual, VTM-
100% of each item
100% of each item
Not permissible
Moisture Barriers
2,3,
Visual, VTM-
100% of each item
100% of each item
Not permissible
NOTES:(1) Examination shall include seals and gaskets on airlocks, hatches, and other devices that are required to assure containment leak-tight
integrity. Disassembly of sealed or gasketed connections is not required solely for the performance of these examinations. (2) Examination shall include internal and external containment moisture barrier materials at concrete-to-metal interfaces intended to prevent
intrusion of moisture against the pressure retaining metal containment shell or liner. (3) Containment moisture barrier materials include caulking, flashing, and other sealants used for this application.(4) Examination shall include all accessible surfaces of internal and external containment moisture barriers.(5) Deferral of inspection is not permissible in the 4th and successive inspection intervals.
Extent and Frequency of Examination
Examination
1st
Deferral of
Item
Parts
Requirements /
Examination
Acceptance
Inspection
Successive
Inspection to
No.
Examined
3,
Fig. No.
Method
Standard
Interval
Inspection Intervals
4
End of Interval
6
Dissimilar Metal Welds
Surface
50% of the total
50% of the total
Permissible
number of welds
1,
number of welds
1,
NOTES:(1) Examination shall include the weld metal and the base metal for
(^1)
in. beyond the edge of the weld.
(2) Welds shall be randomly selected throughout the containment and representative of the type of welds described by each item number.(3) Include dissimilar metal welds between the following combinations:
(a) carbon or low alloy steels to high alloy steels(b) carbon or low alloy steels to high nickel alloys(c) high alloy steels to high nickel alloys. (4) Different welds shall be selected for examination each inspection interval.(4) Includes only those welds subject to cyclic loads and thermal stress during normal plant operation.(5) Deferral of inspection is not permissible in the 4th and successive inspection intervals.
Extent and Frequency of Examination
Examination/
1st
Deferral of
Item
Parts
Test
Examination
Acceptance
Inspection
Successive
Inspection to
No.
Examined
Requirements
Method
Standard
Interval
Inspection Intervals
End of Interval
Containment Vessel
System
Each repair,
Each repair,
Not permissible
1
Pressure Retaining Boundary
2
leakage test
Appendix J
Appendix J
modification, or
modification, or
replacement
replacement
Containment Penetration Bellows
Not permissible
1
Appendix J
Appendix J
Appendix J
Appendix J
Appendix J
(Type Btest)
Airlocks
Not permissible
1
Appendix J
Appendix J
Appendix J
Appendix J
Appendix J
(Type Btest)
Seals and Gaskets
Not permissible
Appendix J
Appendix J
Appendix J
Appendix J
Appendix J
(Type Btest)
NOTES:(1) Leakage tests may be deferred until the next scheduled leakage test, if allowed by IME-5222.(2) If leak chase channels are utilized, they shall be unplugged or tested in accordance with 10 CFR 50, Appendix J, Type B test.