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ARTICLE IWC-
EXAMINATION AND INSPECTION
IWC-2200 PRESERVICE EXAMINATION TABLE IWC-2411-
INSPECTION PROGRAM A
(a) All examinations required by this Article (with
the exception of Examination Category C-H of Table (^) Inspection Period, Minimum Maximum
IWC-2500-1) for those components initially selected Inspection^ Calendar Years of^ Examinations^ Examinations
for examination in accordance with Inspection Program Interval^ Plant Service^ Completed, %^ Credited, %
A or Inspection Program B and not exempt from (^) 1st 3 100 100
inservice examinations by IWC-1220 shall be completed
prior to initial plant startup. 2nd^7 33 10 100 100 (b) Shop and field examinations may serve in lieu
of the on-site preservice examinations, provided: (^) 3rd 13 16 34
(1) in the case of vessels only, the hydrostatic (^17 40 )
test required by Section III has been completed; 20 66 75
(2) such examinations are conducted under condi-^23 100
tions and with equipment and techniques equivalent to 4th 27 8 16 those which are expected to be employed for subsequent (^30 25 )
inservice examinations; (^33 50 )
(3) the shop and field examination records are, or 37 75 100
can be, documented and identified in a form consistent^40 ...
with those required in IWA-6000.
IWC-2400 INSPECTION SCHEDULE^ IWC-2412^ Inspection Program B
IWC-2410 INSPECTION PROGRAM^ (a)^ The required examinations in each examination category shall be completed during each inspection Inservice examinations and system pressure tests may (^) interval in accordance with Table IWC-2412-1, with
be performed during either system operation or plant (^) the exception of welded attachments examined as a
outages. (^) result of component support deformation under Exami-
nation Category C-C. If there are less than three items or welds to be examined in an Examination Category, IWC-2411 Inspection Program A the items or welds may be examined in any two periods, (a) The required examinations in each examination or in any one period if there is only one item or weld,
category shall be completed during each inspection in lieu of the percentage requirements of Table IWC-
interval in accordance with Table IWC-2411-1, with 2412-1.
the exception of welded attachments examined as a (b) If items or welds are added to the Inspection
result of component support deformation under Exami- Program, during the service lifetime of a plant, examina-
nation Category C-C. tion shall be scheduled as follows:
(b) Following completion of Program A after 40 (1) When items or welds are added during the years, successive inspection intervals shall follow the first period of an interval, at least 25% of the examina-
10 year inspection interval of Program B. tions required by the applicable Examination Category
A
IWC-2412 REQUIREMENTS FOR CLASS 2 COMPONENTS IWC-
98 TABLE IWC-2412-
INSPECTION PROGRAM B
Inspection Period, Calendar Years of Plant Service Minimum Maximum Inspection Within the Examinations Examinations Interval Interval Completed, % Credited, %
All 3 16 50 7 50 1 75 10 100 100
Note: (1) If the first period completion percentage for any examination category exceeds 34%, at least 16% of the required examinations shall be performed in the second period.
and Item Number for the added items or welds shall be performed during each of the second and third periods of that interval. (2) When items or welds are added during the second period of an interval, at least 25% of the examinations re- quired by the applicable Examination Category and Item Number for the added items or welds shall be performed during the third period of that interval. (3) When items or welds are added during the third period of an interval, examinations shall be scheduled in accordance with IWC-2412(a) for successive intervals.
IWC-2420 SUCCESSIVE INSPECTIONS
(a) The sequence of component examinations which was established during the first inspection interval shall be repeated during each successive inspection interval, to the extent practical. (b) If a component is accepted for continued service in accordance with IWC-3122.3 or IWC-3132.3, the areas containing flaws or relevant conditions shall be reexamined during the next inspection period listed in the schedule of the inspection programs of IWC-2400. Alternatively, acoustic emission may be used to monitor growth of existing flaws in accordance with IWA-2234. (c) If the reexaminations required by IWC-2420(b) reveal that the flaws or relevant conditions remain essentially unchanged for the next inspection period, the component examination schedule may revert to the original schedule of successive inspections. (d) If welded attachments are examined as a result of identified component support deformation and the results of these examinations exceed the acceptance standards of Table IWC-3410-1 successive examinations shall be performed, if determined necessary, based on an evaluation by the Owner.
IWC-2430 ADDITIONAL EXAMINATIONS
(a) Examinations performed in accordance with Table IWC-2500-1, except for Examination Category C-H, that reveal flaws or relevant conditions exceeding the acceptance standards of Table IWC-3410-1 shall be extended to include additional examinations during the current outage. The additional examinations shall in- clude an additional number of welds, areas, or parts 1 included in the inspection item 2 equal to 20% of the number of welds, areas, or parts included in the inspec- tion item that are scheduled to be performed during the interval. The additional examinations shall be se- lected from welds, areas, or parts of similar material and service. This additional selection may require inclu- sion of piping systems other than the one containing the flaws or relevant conditions. (b) If the additional examinations required by IWC- 2430(a) reveal flaws or relevant conditions exceeding the acceptance standards of Table IWC-3410-1, the examina- tions shall be further extended to include additional exami- nations during the current outage. These additional exami- nations shall include the remaining number of welds, areas, or parts of similar material and service subject to the same type of flaws or relevant conditions. (c) For the inspection period following the period in which the examinations of IWC-2430(a) or (b) were completed, the examinations shall be performed as originally scheduled in accordance with IWC-2400. (d) If welded attachments are examined as a result of identified component support deformation and the results of these examinations exceed the acceptance standards of Table IWC-3410-1 additional examinations shall be performed, if determined necessary, based on an evaluation by the Owner.
IWC-2500 EXAMINATION AND PRESSURE TEST REQUIREMENTS
(a) Components shall be examined and pressure tested as specified in Table IWC-2500-1. The method of examination for the components and parts of the pressure retaining boundaries shall comply with those tabulated in Table IWC-2500-1, except where alternate examination methods are used that meet the require- ments of IWA-2240.
(^1) Welds, areas, or parts are those described or intended in a particular inspection item of Table IWC-2500-1. (^2) An inspection item, as listed in Table IWC-2500-1, may comprise a number of welds, areas, or parts of a component required to be examined in accordance with the inspection plan and schedule (IWA-2420).
REQUIREMENTS FOR CLASS 2 COMPONENTS Table IWC-2500-
TABLE IWC-2500-
EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-A, PRESSURE RETAINING WELDS IN PRESSURE VESSELS
Examination
Item
Requirements /
Examination
Acceptance
Frequency of
No.
Parts Examined
Fig. No.
Method
5
Standard
Extent of Examination
Examination
4
C1.
Shell Circumferential Welds
IWC-2500-
Volumetric
IWC-
Welds
1
at gross structural
Each inspection
discontinuity
2
only
interval
C1.
Head Circumferential Welds
IWC-2500-
Volumetric
IWC-
Head-to-shell weld
1
Each inspection
interval
C1.
Tubesheet-to-Shell Weld
IWC-2500-
Volumetric
IWC-
Tubesheet-to-shell weld
1
Each inspection
interval
NOTES:(1) Includes essentially 100% of the weld length.(2) Gross structural discontinuity is defined in NB-3213.2. Examples are junctions between shells of different thicknesses, cylindrical shell-to-conical shell junctions,
shell (or head)-to-flange welds, and head-to-shell welds. (3) In the case of multiple vessels of similar design, size, and service (such as steam generators, heat exchangers), the required examinations may be limited to one
vessel or distributed among the vessels. (4) The vessel areas selected for the initial examination shall be reexamined in the same sequence over the service lifetime of the component, to the extent practical.(5) For welds in vessels with nominal wall thickness of 0.2 in. or less, a surface examination may be applied in lieu of a volumetric examination. The examination
shall include the weld and 0.5 in. on either side of the weld. The acceptance standard for the examination shall be those specified for piping in IWC-3514.
Table IWC-2500-1 1998 SECTION XI — DIVISION 1
TABLE IWC-2500-1 (CONT’D)
A
EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-B, PRESSURE RETAINING NOZZLE WELDS IN VESSELS
Examination
Item
Requirements /
Examination
Acceptance
Frequency of
No.
Parts Examined
Fig. No.
Method
Standard
Extent of Examination
4
Examination
3
C2.
Nozzles in Vessels
(^1)
⁄^2
in. Nominal
Thickness
C2.
Nozzle-to-Shell (Nozzle to Head or
IWC-2500-
Surface
IWC-
All nozzles at terminal ends
1 of
Each inspection
Nozzle to Nozzle) Weld
piping runs
2
interval
C2.
Nozzles Without Reinforcing Plate
in Vessels >
(^1)
⁄^2
in. Nominal Thickness
C2.
Nozzle-to-Shell (Nozzle to Head or
IWC-2500-4(a) or (b)
Surface and volumetric
IWC-
All nozzles at terminal ends
1 of
Each inspection
Nozzle to Nozzle) Weld
piping runs
2
interval
C2.
Nozzle Inside Radius Section
IWC-2500-4(a) or (b)
Volumetric
IWC-
All nozzles at terminal ends
1 of
Each inspection
piping runs
2
interval
C2.
Nozzles With Reinforcing Plate
in Vessels >
(^1)
⁄^2
in. Nominal Thickness
C2.
Reinforcing Plate Welds to
IWC-2500-4(c)
Surface
IWC-
All nozzles at terminal ends
1 of
Each inspection
Nozzle and Vessel
piping runs
2
interval
C2.
Nozzle-to-Shell (Nozzle to Head or
IWC-2500-4(c)
Volumetric
IWC-
All nozzles at terminal ends
1 of
Each inspection
Nozzle to Nozzle) Welds
piping runs
2
interval
When Inside of Vessel is Accessible
C2.
Nozzle-to-Shell (Nozzle to Head or
Note (5)
Visual, VT-
No leakage
All nozzles at terminal ends
1 of
Each inspection
Nozzle to Nozzle) Welds
piping runs
2
period
When Inside of Vessel Is Inaccessible
NOTES:(1) Includes nozzles welded to or integrally cast in vessels that connect to piping runs (manways and handholes are excluded).(2) Includes only those piping runs selected for examination under Examination Category C-F.(3) The nozzles selected initially for examination shall be reexamined in the same sequence over the service lifetime of the component, to the extent practical.(4) In the case of multiple vessels of similar design, size, and service (such as steam generators, heat exchangers), the required examinations be limited to one vessel
or distributed among the vessels. (5) The telltale hole in referencing plate shall be examined for evidence of leakage while vessel is undergoing the system leakage test (IWC-5220) as required by
Examination Category C-H.
Table IWC-2500-1 1998 SECTION XI — DIVISION 1
TABLE IWC-2500-1 (CONT’D)EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-D, PRESSURE RETAINING BOLTING GREATER THAN 2 in. IN DIAMETER
Examination
Item
Requirements /
Examination
Acceptance
Frequency of
No.
Parts Examined
1
Fig. No.
Method
Standard
Extent of Examination
1,2,
Examination
4
Pressure Vessels
C4.
Bolts and Studs
IWC-2500-
Volumetric
IWC-
100% bolts and studs at each
Each inspection
bolted connection of com-
interval
ponents required to beinspected
Piping
C4.
Bolts and Studs
IWC-2500-
Volumetric
IWC-
100% bolts and studs at each
Each inspection
bolted connection of com-
interval
ponents required to beinspected
Pumps
C4.
Bolts and Studs
IWC-2500-
Volumetric
IWC-
100% bolts and studs at each
Each inspection
bolted connection of com-
interval
ponents required to beinspected
Valves
C4.
Bolts and Studs
IWC-2500-
Volumetric
IWC-
100% bolts and studs at each
Each inspection
bolted connection of com-
interval
ponents required to beinspected
NOTES:(1) The examination may be performed on bolting in place under load or upon disassembly of the connection.(2) The examination of bolting for vessels, pumps, and valves may be ocnducted on one vessel, one pump, one valve among a group of vessels, pumps, and valves in
each system required to be examined and which are similar in design, size, function, and service. In addition, where the one component to be examined containsa group of bolted connections of similar design and size (such as flange connections, manway covers), the examination may be conducted on one bolted connectionamong the group. (3) The examination of flange bolting in piping systems required to be examined may be limited to the flange connections in pipe runs selected for examination under
Examination Category C-F. (4) The areas selected for the initial examination shall be reexamined in the same sequence over the service lifetime of the component, to the extent practical.
REQUIREMENTS FOR CLASS 2 COMPONENTS Table IWC-2500-
TABLE IWC-2500-1 (CONT’D)EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-F-1, PRESSURE RETAINING WELDS IN AUSTENITIC STAINLESS STEEL OR HIGH ALLOY PIPING
Examination
Item
Requirements /
Examination
Acceptance
Frequency of
No.
Parts Examined
1
Fig. No.
Method
Standard
Extent of Examination
2
Examination
4
C5.
Piping Welds
(^3)
⁄^8
in. Nominal Wall
Thickness for Piping > NPS 4
C5.
Circumferential Weld
IWC-2500-
Surface and volumetric
IWC-
100% of each weld requiring
Each inspection
examination
5,
interval
C5.
Piping Welds >
(^1)
⁄^5
in. Nominal Wall Thick-
ness for Piping
NPS 2 and
NPS 4
C5.
Circumferential Weld
IWC-2500-
Surface and volumetric
IWC-
100% of each weld requiring
Each inspection
examination
5,
interval
C5.
Socket Welds
IWC-2500-
Surface
IWC-
100% of each weld requiring
Each inspection
examination
interval
C5.
Pipe Branch Connections of Branch Piping
NPS 2
C5.
Circumferential Weld
IWC-2500-9 to -13,
Surface
IWC-
100% of each weld requiring
Each inspection
inclusive
examination
5
interval
NOTES:See Notes at end of Examination Category C-F-1.
REQUIREMENTS FOR CLASS 2 COMPONENTS Table IWC-2500-
TABLE IWC-2500-1 (CONT’D)EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-F-2, PRESSURE RETAINING WELDS IN CARBON OR LOW ALLOY STEEL PIPING
Examination
Item
Requirements /
Examination
Acceptance
Frequency of
No.
Parts Examined
1
Fig. No.
Method
Standard
Extent of Examination
2,
Examination
4
C5.
Piping Welds
(^3)
⁄^8
in. Nominal Wall
Thickness for Piping > NPS 4
C5.
Circumferential Weld
IWC-2500-
Surface and volumetric
IWC-
100% of each weld requiring
Each inspection
examination
6,
interval
C5.
Piping Welds >
(^1)
⁄^5
in. Nominal Wall Thick-
ness for Piping
NPS 2 and
NPS 4
C5.
Circumferential Weld
IWC-2500-
Surface and volumetric
IWC-
100% of each weld requiring
Each inspection
examination
6,
interval
C5.
Socket Welds
IWC-2500-
Surface
IWC-
100% of each weld requiring
Each inspection
examination
interval
C5.
Pipe Branch Connections of Branch Piping
NPS 2
C5.
Circumferential Weld
IWC-2500-9 to -13,
Surface
IWC-
100% of each weld requiring
Each inspection
inclusive
examination
6
interval
NOTES:See Notes at end of Examination Category C-F-2.
Table IWC-2500-1 1998 SECTION XI — DIVISION 1
TABLE IWC-2500-1 (CONT’D)
A
EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-F-2, PRESSURE RETAINING WELDS IN CARBON OR LOW ALLOY STEEL PIPING (CONT’D)
NOTES:(1) Requirements for examination of welds in piping
NPS 4 apply to PWR high pressure safety injection and auxiliary feedwater systems in accordance with the
exemption criteria of IWC-1220. (2) The welds selected for examination shall include 7.5%, but not less than 28 welds, of all carbon and low alloy steel welds not exempted by IWC-1220. (Some
welds not exempted by IWC-1220 are not required to be nondestructively examined per Examination Category C-F-2. These welds, however, shall be included inthe total weld count to which the 7.5% sampling rate is applied.) The examinations shall be distributed as follows:(a) the examinations shall be distributed among the Class 2 systems prorated, to the degree practicable, on the number of nonexempt carbon and low alloy steel
welds in each system (i.e., if a system contains 30% of the nonexempt welds, then 30% of the nondestructive examinations required by Examination CategoryC-F-2 should be performed on that system); (b) within a system, the examinations shall be distributed among terminal ends and structural discontinuities [see Note (3)] prorated, to the degree practicable,
on the number of nonexempt terminal ends and structural discontinuities in that system; and (c) within each system, examinations shall be distributed between line sizes prorated to the degree practicable. (3) Structural discontinuities include pipe weld joints to vessel nozzles, valve bodies, pump casings, pipe fittings (such as elbows, tees, reducers, flanges, etc., conforming
to ANSI B16.9), and pipe branch connections and fittings. (4) The welds selected for examination shall be reexamined in the same sequence, during subsequent inspection intervals over the service lifetime of the piping component,
to the extent practical. (5) Only those welds showing reportable preservice transverse indications need to be examined by the ultrasonic method for reflectors transverse to the weld length
direction, except that circumferential welds with intersecting longitudinal weld shall meet Note (7). (6) For circumferential welds with intersecting longitudinal welds, surface examination of the longitudinal piping welds is required for those portions of the welds
within the examination boundaries of intersecting circumferential welds. (7) For circumferential welds with intersecting longitudinal welds, volumetric examination of the longitudinal piping welds is required for those portions of the welds
within the examination boundaries of intersecting circumferential welds. The following requirements shall also be met:(a) When longitudinal welds are specified and locations are known, examination requirements shall be met for both transverse and parallel flaws at the intersection
of the welds and for that length of longitudinal weld within the circumferential weld examination volume. (b) When longitudinal welds are specified but locations are unknown, or the existence of longitudinal welds is uncertain, the examination requirements shall be
met for both transverse and parallel flaws within the entire examination volume of intersecting circumferential welds.
Table IWC-2500-1 1998 SECTION XI, DIVISION 1
TABLE IWC-2500-1 (CONT’D)EXAMINATION CATEGORIES
EXAMINATION CATEGORY C-H, ALL PRESSURE RETAINING COMPONENTS
Item
Test
Examination
Acceptance
Frequency of
No.
Parts Examined
Requirement
Method
1
Standard
Extent of Examination
Examination
C7.
Pressure retaining components
System leakage
Visual, VT-
IWC-
Pressure retaining boundary
Each inspection
test (IWC-5220)
period
NOTES:(1) Visual examination of IWA-5240.
REQUIREMENTS FOR CLASS 2 COMPONENTS Fig. IWC-2500-
FIG. IWC-2500-1 VESSEL CIRCUMFERENTIAL WELDS
REQUIREMENTS FOR CLASS 2 COMPONENTS Fig. IWC-2500-
FIG. IWC-2500-3 NOZZLE-TO-VESSEL WELDS
Fig. IWC-2500-4 1998 SECTION XI — DIVISION 1
FIG. IWC-2500-4 NOZZLE-TO-VESSEL WELDS
Fig. IWC-2500-5 1998 SECTION XI — DIVISION 1
FIG. IWC-2500-5 WELDED ATTACHMENTS
Note: Examination of surface areas may be limited to the portions of these areas that are accessible without removal
of support members.
REQUIREMENTS FOR CLASS 2 COMPONENTS Fig. IWC-2500-
FIG. IWC-2500-6 PRESSURE RETAINING BOLTING
