ML072850870
| ML072850870 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 12/31/1992 |
| From: | - No Known Affiliation |
| To: | NRC/SECY |
| SECY RAS | |
| References | |
| 50-219-LR, AmerGen-Staff-2, RAS 14391 | |
| Download: ML072850870 (18) | |
Text
R15'./9-/
Staff Exhibit 2 U.S. NUCLEAR REGULATORY COMMISSION Doc~go.$C,~g -~-O ficaxhbit ND. j5 OO by: APPlicant/Licensee Intervenor N
Other DOCKETED USNRC October 1, 2007 (10:45am)
OFFICE OF SECRETARY RULEMAKINGS AND ADJUDICATIONS STAFF Subsection IWE Excerpts "Te pl*ale=5 ecy- 0.P7 sec Y-09z
SUBSECTION IWE REQUIREMENTS FOR CLASS MC AND METALLIC LINERS OF CLASS CC COMPONENTS OF LIGHT-WATER COOLED PLANTS IWE-1000 IWE-I 100 IWE-1200 IWE-1210 IWE-1 220 IWE-1230 IWE-1231 IWE-1232 IWE-1240 fWE-1241 IWE-1242 IWE-2U00 IWE-2200 IWE-2400 IWE-2410 IWE-2411 IWE-2412
!WE-2420
[WE-2430 IWE-2500 I'WE-2600
[WE-3000 IWE-3100 IWE-31 10 IWE-31 II IWE-3112 IWE-3114 IWE-3115 IWE-3120 IWE-3121 IWE-3122 IWE-3122.1 Scope and Responsibility.................................................
S cope..................................
Components Subject to Examination........................................
Exam ination Requirements Components Exempted From Examination Accessibility for Exam ination..............................................
Accessible Surface Areas Inaccessible Surface Areas Surface Areas Requiring Augmented Examination.............................
Exam ination Surface Areas....................
Identification of Examination Surface Areas..................................
Exam ination and Inspection..............................................
Preservice Exam ination...................................................
Inspection Schedule......................................................
Inspection Program.......................................................
Inspection Program A Inspection Program B...............................................
Successive Inspections....................................................
A dditional Exam inations Examination and Pressure Test Requirements.................................
Condition of Surface to Be Examined.......................................
Acceptance Standards...................................................
Evaluation of Nondestructive Examination Results Preservice Exam inations G eneral A cceptance Repairs and Reexam inations R eview by A uthorities....................................................
Inservice Nondestructive Examinations G eneral A cceptance Acceptance by Exam ination 215 215 215 215 215 215 215 215 216 216 216 217 217 217 217 217 218 218 218.
218 219 228 228 228 228 228 228 228 228 228 228 228 21!
IWE-3122.2 1WE-3122.3 IWE-3122.4 IWE-3124 IWE-3125 IWE-3130 IWE-3200 IWE-3400 IWE-3410 IWE-3430 IWE-3500 IWE-35 10 IWE-3510.1 IWE-3510.2 IWE-3510.3 IWE-351 I IWE-35 11.1 IWE-3511.2 IWE-3512 IWE-3512. I IWE-3512.2 IWE-3512.3 IWE-3513 IWE-3513.1 IWE-3514 IWE-3514. !
IWE-3515 IWE-3515. I IWE-3515.2 IWE-4000 IWE-4100 IWE.5000 IWE-5200 IWE-5210 IWE-5220 IWE-5221 IWE-5222 IWE-5240 IWE-5250 IWE-7000 IWE-7100 A cceptance by Repair Acceptance by Replacem ent...............................................
A cceptance by Evaluation.................................................
Repairs and Reexam inations...............................................
R eview by A uthorities....................................................
Inservice Visual Examinations.........................................
Supplemental Examinations...........................................
Standards...............................................................
A cceptance Standards.....................................................
A cceptability....
Acceptance Standards.....................................................
Standards for Examination Category E-A, Containment Surfaces................
Visual Exam inations -
General............................................
VT-3 Visual Examinations on Coated Areas VT-3 Visual Examinations on Noncoated Areas Standards for Examination Category E-B, Pressure-Retaining Welds VT-I Visual Examinations on Coated Areas VT-i Visual Examinations on Noncoated Areas Standards for Examination Category E-C, Containment Surfaces Requiring A ugmented Exam inations VT-I Visual Examinations on Coated Areas VT-I Visual Examinations on Noncoated Areas U ltrasonic Exam ination...................................................
Standards for Examination Category E-D, Seals, Gaskets, and Moisture B arriers VT-3 Visual Exam inations Standards for Examination Category E-F; Pressure Retaining Dissimilar
.M etal W elds..........................................................
Surface Exam inations.........................................
Standards for Examination Category E-G, Pressure Retaining Bolting Visual Exam inations......................................................
Bolt Torque or Bolt Tension R epair Procedures S co pe...........................................................
System Pressure Tests...................................................
System Test Requirem ents G eneral Tests Following Repair, Modification, or Replacement.........................
L eakage T est............................................................
Deferral of Leakage Tests............................................
V isual Exam ination C orrective M easures......
228 229 229 229 229 229 229 229 229 229 229 229 229 230 230 230 230 230 230 230 231 231 231 231 231 231 231 231 232 232 233 233 233 233 233 233 233 233 R eplacem ents...........................................................
234 G eneral Requirem ents 234 212
Figures
[W E-2500-1 Dissimilar M etal W elds..................................................
219 IW E-2500-2 Examination Areas for Moisture Barriers 220 Tables IW E-241 I-I Inspection Program A 218 IW E-2412-1 Inspection Program B.............................................
218 IW E-2500-1 Exam ination Categories...................................................
221 IW E-3410-1 Acceptance Standards.....................................................
230 213
ARTICLE IWE-1000 SCOPE AND RESPONSIBILITY IWE-1100 SCOPE This Subsection provides the rules and requirements for inservice inspection, repair, and replacement of Class MC pressure retaining components and their in-tegral attachments, and of metallic shell and penetration liners of Class CC pressure retaining components and their integral attachments in light-water cooled plants.
IWE-1200 COMPONENTS SUBJECT TO EXAMINATION INWE-1210 EXAMINATION REQUIREMENTS The examination requirements of this Subsection shall apply to Class MC pressure retaining components and their integral attachments and to metallic shell and penetration liners of Class CC pressure retaining com-ponents and their integral attachments. These exami-nations shall apply to surface areas, including welds and base metal.
IWE-1220 COMPONENTS EXEMPTED FROM EXAMINATION The following components (or parts of components) are exempted from the examination requirements of IWE-2000:
(a) vessels, parts, and appurtenances that are outside the boundaries of the containment as defined in the Design Specifications; (b) embedded or inaccessible portions of contain-ment vessels, parts, and appurtenances that met the re-quirements of the original Construction Code; (c) portions of containment vessels, parts, and ap-purtenances that become embedded or inaccessible as a result of vessel repair or replacement if the conditions of IWE-1232 and IWE-5220 are met; (d) piping, pumps, and valves that are part of the containment system, or which penetrate or are attached to the containment vessel. These components shall be examined in accordance with the rules of IWB or IWC, as appropriate to the classification defined by the De-sign Specifications.
IWE-1230 ACCESSIBILITY FOR EXAMINATION IWE-1231 Accessible Surface Areas (a) As a minimum, the following portions of Class MC containment vessels, parts, and appurtenances and Class CC metallic shell and penetration liners shall re-main accessible for either direct or remote visual ex-amination, from at least one side of the vessel, for the life of the plant:
(1) openings and penetrations; (2) structural discontinuities; (3) single-welded butt joints from the weld side; (4) 80% of the surface area defined in Table [WE-2500-1, Examination Category E-A; and (5) surface areas identified in IWE-1240.
(b) The requirements of IWE-1232 shall be met when accessibility for visual examination is not from the outside surface.
IWE-1232 Inaccessible Surface Areas (a) Portions of Class MC containment vessels, parts, and appurtenances that are embedded in concrete or otherwise made inaccessible during construction of the vessel or as a result of vessel repair, modification, or replacement are exempted from examination, provided:
(1) no openings or penetrations are embedded in the concrete; (2) all welded joints that are inaccessible for ex-amination are double buttwelded and are fully radio-graphed and, prior to being covered, are tested for leak tightness using a gas medium test, such as Halide Leak Detector Test; 215
[WE-1232 1992 SECTION XI -
DIVISION I IWE-1242 (3) all weld joints that are not double butt welded remain accessible for examination from the weld side; and (4) the vessel is.leak rate tested after completion of construction, repair, or replacement to the leak rate requirements of the Design Specifications.
(b) Portions of Class CC metallic shell and penetra-tion liners that are embedded in concrete or otherwise made inaccessible during construction or as a result of repair or replacement are exempted from examination, provided:
(1) all welded joints that are inaccessible for ex-amination are examined in accordance with CC-5520 and, prior to being covered or otherwise obstructed by adjacent structures, components, parts, or appurte-nances, are tested for leak tightness in accordance with CC-5536; and (2) the containment is leak rate tested after com-pletion of construction, repair, or replacement to the leak rate requirements of the Design Specifications.
IWE-1240 SURFACE AREAS REQUIRING AUGMENTED EXAMINATION IWE-1241 Examination Surface Areas Surface areas likely to experience accelerated deg-radation and aging require the augmented examinations identified in Table IWE-2500-1, Examination Category E-C. Such areas include the following:
(a) interior and exterior containment surface areas that are subject to accelerated corrosion with no or min-inal corrosion allowance or areas where the absence or repeated loss of protective coatings has resulted in substantial corrosion and pitting. Typical locations uf such areas are those exposed to standing water, re-peated wetting and drying, persistent leakage, and those with geometries that permit water accumulation, condensation, and microbiological attack. Such areas may include penetration sleeves, surfaces wetted during refueling, concrete-to-steel shell or liner interfaces, embedment zones, leak chase channels, drain areas, or sump liners.
(b) interior and exterior containment surface areas that are subject to excessive wear from abrasion or ero-sion that causes a loss of protective coatings, defor-mation, or material loss. Typical locations of such areas are those subject to substantial traffic, sliding pads or supports, pins or clevises, shear lugs, seismic restraints, surfaces exposed to water jets from testing operations or safety relief valve discharges, and areas that experience wear from frequent vibrations.
IWE-1242 Identification of Examination Surface Areas Surface areas requiring augmented examination shall be determined in accordance with IWE-1241, and shall be identified in the Owner's Inspection Program.
Examination methods shall be in accordance with IWE-2500(c).
216
ARTICLE IWE-2000 EXAMINATION AND INSPECTION IWE-2200 PRESERVICE EXAMINATION (a) Examinations listed in Table IWE-2500-1 shall be completed prior to initial plant startup. These pre-service examinations shall include the pressure retain-ing portions of components not exempted by IWE-1220.
(b) When visual examinations are required, these ex-aminations shall be performed in accordance with IWE-2600, following the completion of the pressure test re-quired by the Construction Code and after application of protective coatings (e.g., paint) when such coatings are required.
(c) When surface examinations are required by Ta-ble IWE-2500-1, shop or field examinations in accor-dance with NE-5000 for Class MC or CC-5500 for Class CC may serve in lieu of the on-site preservice examinations, provided:
(1) the examinations are conducted by the same method with equipment and techniques equivalent to those that are expected to be employed for subsequent inservice examinations; (2) the shop or field examination records are, or can be, documented and identified in a form consistent with those required in IWA-6000; and (3) the examinations are performed after the pres-sure test required by the Construction Code has been completed.
(d) When a vessel, liner, or a portion thereof is re-paired or replaced during the service lifetime of a plant, the preservice examination requirements for the vessel repair or replacement shall be met.
(1) When the repair or replacement is performed while the plant is not in service, the preservice ex-amination shall be performed prior to the resumption of service.
(2) When the repair or replacement is performed while the plant is in service, the preservice examination may be deferred to the next scheduled plant outage, provided nondestructive examination in accordance with the approved repair program is performed.
(3) When a system leakage test is required by IWE-5220, the preservice examination may be per-formed either prior to or following the test.
(e) Welds made as part of a repair or a replacement program shall be examined in accordance with the re-quirements of IWA-4000, except that for welds joining Class MC or Class CC components to items designed, constructed, and installed to the requirements of Sec-tion III, Class 1, 2, or 3, the examination requirements of IWB-2000, IWC-2000, or IWD-2000, as applicable, shall apply.
(f) Preservice examination for a repair or replace-ment may be conducted prior to installation provided:
(I) the examination is performed after the pressure test required by the Construction Code has been com-pleted; (2) the examination is conducted under conditions and with equipment and techniques equivalent to those that are expected to be employed for subsequent in-service examinations; and (3) the shop or field examination records are, or can be, documented and identified in a form consistent with that required by IWA-6000.
(g) When paint or coatings are reapplied, the con-dition of the new paint or coating shall be documented in the preservice examination records.
IWE-2400 INSPECTION SCHEDULE IWE-2410 INSPECTION PROGRAM Inservice examinations and system pressure tests may be performed during plant. outages such as re-fueling shutdowns or maintenance shutdowns. The re-quirements of either Inspection Program A or Inspec-tion Program B shall be met.
IWNIE-2411 Inspection Program A (a) With the exception of the examinations that may be deferred until the end of an inspection interval, as 217
IIVE-2411 1992 SECTION XI -
DIVISION I IWE-2500 TABLE IWE-2411-1 INSPECTION PROGRAM A Inspection Period, Minimum Maximum Inspection Calendar Years of Examinations Examinations Interval Plant Service Completed, %
Credited, %
1st 3
100 100 2nd 7
33 b7 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 specified in Table IWE-2500-l,. the required exami-nations shall be completed during each successive in-spection interval, in accordance with Table IWE-241 I -1.
Following completion of Program A after 40 years, successive inspection intervals shall follow the 10 year inspection interval of Program B.
(b) The inspection period specified in IWE-241 1(a) may be decreased or extended by as much as 1 year to enable an inspection to coincide with a plant outage, within the limitations of 1"WA-2430(c).
IWE-2412 Inspection Program B (a) With the exception of the examinations that may be deferred until the end of an inspection interval, as specified in Table IWE-2500-1, the required exami-nations shall be completed during each successive in-spection interval, in accordance with Table IWE-2412-1.
(b) The inspection period specified in IWE-2412(a) may be decreased or extended by as much as I year to enable an inspection to coincide with a plant outage, within the limitations of IWA-2430(d).
IWE-2420 SUCCESSIVE INSPECTIONS (a) The sequence of component examinations estab-lished during the first inspection interval shall be re-peated during each successive inspection interval, to the extent practical.
(b) When component examination results require evaluation of flaws, areas of degradation, or repairs in TABLE IWE-2412-1 INSPECTION PROGRAM B Inspection Period, Calendar Years of Minimum Maximum Inspection Plant Service, Examinations Examinations Interval Within the Interval Completed, %
Credited, %
1st 3
16 34 7
50 67 10 100 100 Successive 3
16 34 7
50 67 10 100 100 accordance with IWE-3000, and the component is found to be acceptable for continued service, the areas containing such flaws, degradation, or repairs shall be reexamined during the next inspection period listed in the schedule of the inspection program of IWE-2411 or 1WE-2412, in accordance with Table IWE-2500-I, Examination Category E-C.
(c) When the reexaminations required by IWE-2420(b) reveal that the flaws, areas of degradation, or repairs remain essentially unchanged for three consec-utive inspection periods, the areas containing such flaws, degradation, or repairs no longer require aug-mented examination in accordance with Table IWE-2500-1. Examination Category E-C.
IWE-2430 ADDITIONAL EXAMINATIONS (a) Examinations performed during any one inspec-tion that reveal flaws or areas of degradation exceeding the acceptance standards of Table IWE-3410-1 shall be extended to include an additional number of exami-nations within the same category approximately equal to the initial number of examinations during the in-spection.
(b) When additional flaws or areas of degradation that exceed the acceptance standards of Table IWE-34.10-1 are revealed, all of the remaining examinations within the same category shall be performed to the ex-tent specified in Table ]WE-2500-1 for the inspection interval.
IWE-2500 EXAMINATION AND PRESSURE TEST REQUIREMENTS (a) The method of examination for the components, parts, and items (e.g., seals, gaskets, and bolts) of the pressure retaining boundaries shall comply with those 218
lVE-2500 REQUIREMENTS FOR CLASS MC COMPONENTS IWE-260O Examinalion Surlace A-B 1,12in.
1,/2 in.
A B
C D
Examination Surtace C-D (1) Surface areas accessible from both sides shall be visually examined using a VT-I visual examihation method.
(2) Surface areas accessible from one side only shall be examined for wall ihinnitip using an ultrasonic thickness measurement method in accordance with Sec-tion V, T-544.
(3) When ultrasonic thickness measurements are performed, one foot square grids shall be used. The number and location of the grids shall be determined by the Owner.
(4) Ultrasonic measurements shall be used to de-termine the minimum wall thickness within each grid.
The location of the minimum wall thickness shall be marked such that periodic reexamination of that loca-tion can be performed in accordance with the require-ments of Table IWE-2500-1, Examination Category E-C.
IWE-2600 CONDITION OF SURFACE TO BE EXAMINED (a) When a containment vessel or liner is painted or coated to protect surfaces from corrosion. preservice and inservice visual examinations shall be performed without the removal of the paint or coating.
(b) When removal of paint or coating is required, it shall be removed in a manner that will not reduce the base metal or weld thickness below the design thick-ness. Reapplied paint and coating systems shall be compatible with the existing system, and shall be ex-amined in accordance with IWE-2200(g).
Surface Areas A - B and C - D FIG. iWE-2500-1 DISSIMILAR METAL WELDS tabulated in Table IWE-2500-1I, except where alternate examination methods are used that meet the require-ments of IWA-2240.
(b) When paint or coatings are to be removed, the paint or coatings shall be visually examined in accor-dance with Table IWE-2500-1 prior to removal.
(c) Examination methods for surface areas for aug-mented examination in IWE-1242 shall comply with the following criteria.
219
Fig. IWE-2500-2 1992 SECTION XI -
DIVISION I Examination area A-B
- Pressure retaining metal containment shell or liner External concrete-to-metal interface moisture barrier Examination area C-D Interal concrete-to-metal interface moisture barrier Embedded shell or liner FIG. IWE-2500-2 EXAMINATION AREAS FOR MOISTURE BARRIERS 220
I'-)
TABLE IWE-2500-1 (CONT'D)
EXAMINATION CATEGORIES EXAMINATION CATEGORY E-A, CONTAINMENT SURFACES Extent and Frequency of Examination Examlination' 1st Deferral of Item Parts Requirements/
Examination Acceptance Inspection Successive Inspection to No.
Examined Fig. No.
Method Standard Interval Inspection Intervals End of Interval9 E1.10 Containment Vessel Pressure Retaining Boundary E.l1l Accessible Surface Areas 2.3.5 IWE-3510.1 General Visual 7 IWE-3510.1 100%
100%
Not permissible Prior to each Prior to each Type A tests Type A tests EI,12 Accessible Surface Areas 2.4.1
]WE-3510.2 Visual, VT-3 IWE-3510.2 100%
100%
N/A
]WE-3510.3 IWE-3510.3 End. of interval End of interval E1.20 Vent System IWE-3510.2 Visual, VT-3 IWE-3510.2 100%
100%
N!A Accessible Surface Areas 2-4 s.6' IWE-3510.3
]WE-3510.3 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 iWE-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 '/, In. beyond the edge of the weld.
(6) includes flow channeling devices within containment vessels.
(7) Refer to IWE-3510.1 for General Visual examination method requirements.
(8) Refer to IWE-5220 for test requirements.
(9) Deferral of inspection is not permissible In the 4th and successive inspection intervals.
17-)
- Ell,
TABLE IWE-2500-1 (CONT'D)
EXAMINATION CATEGORIES 14)
EXAMINATION CATEGORY E-B, PRESSURE RETAINING WELDS 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 Intervals4 End of Interval 7 E3.10 Containment Penetration Welds',5 Visual, VT-1 IWE-3511 25% of the total 25% of the total Permissible number of welds'.'
number of welds'.2 E3.11 Longitudinal E3.12 Circumferential E3.13 Flued Head and Bellows Seal Circumferential Welds Joined to the Penetration E3.20 Flange Welds (Category C)0 Visual, VT-1 lWE-3511 25% of the total 25% of the total Permissible number of weldsl, 2 number of welds'-2 E3.30 Noule-to-Shell Welds (Category D)6 Visual, VT-1 IWE-3511 25% of the total 25% of the total Permissible number of welds 1.'
number of welds'2.
NOTES:
(1) Examination shall include the weld metal and the base metal for % 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.
'0
IJ f-J TABLE IWE-2500-1 (CONT'D)
EXAMINATION CATEGORIES EXAMINATION CATEGORY E-C, CONTAINMENT SURFACES REQUIRING AUGMENTED EXAMINATION 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 End of Interval 3 E.4.10 Containment Surface Areas E4.11 Visible Surfaces Visual, VT-1 IWE-3512.1 100% of Surface 100% of Surface Not Permissible IWE-3512.2 Areas Identified Areas Identified by IWE-12421 by IWE-12422 m
E4.12 Surface Area Grid, Volumetric IWE-3512.3 100% of Minimum 100% of Minimum Not Permissible ZMr Minimum Wall Thickness Location Wall Thickness Wall Thickness Locations during Locations during each Inspection each Inspection
-I Period, established Period, established in accordance in accordance 0
with with IWE-2500(c)(3) 2 IWE-2500(c)(3)2 r) and and iWE-2500(c)(4) 2 IWE-2500(c)(4) 2 0
z
(-I NOTES:
(1) Containment surface areas requiring augmented examination are those identified In IWE-1240.
(2) The extent of examination shall be 100% for each Inspection period until the areas examined remain essentially unchanged for three consecutive inspection periods. Such areas no longer require augmented examination In accordance with IWE-2420(c).
(3) Deferral of inspection Is not permissible In the 4th and successive Inspection Intervals.
I..)
TABLE IWE-2500-1 (CONT'D)
EXAMINATION CATEGORIES EXAMINATION CATEGORY E-D, SEALS, GASKETS, AND MOISTURE BARRIERS 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 End of Interval 5 E5.10 Seals' Visual, VT-3 IWE-3513 100% of each item 100% of each item Not permissible E5.20 Gaskets' Visual,. VT-3 IWE-3513 100% of each item 100% of each item Not permissible E5.30 Moisture Barriers 2.3.'
IWE-2500-2 Visual, VT-3 IWE-3513 100% of each item 100% of each item Not permissible NOTE:
(1) Examination shall include seals and gaskets on airlocks, hatches, and other devices that are required to assure containment leak-tight Integrity.
(Z) 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.
V.-,
ARTICLE IWE-3000 ACCEPTANCE STANDARDS IWE-3100 EVALUATION OF NONDESTRUCTIVE EXAMINATION RESULTS IWE-3110 PRESERVICE EXAMINATIONS IWE-3111 General The preservice examination required by IWE-2200 and performed in accordance with the procedures of IWA-2200 shall be evaluated by the acceptance stan-dards specified in Table IWE-3410-1. Acceptance of components for service shall be in accordance with IWE-3112, IWE-3114, and [WE-3115.
IWE-3112 Acceptance (a) Components whose examination either confirms the absence of or reveals flaws or areas of degradation that do not exceed the acceptance standards of Table IWE-3410-1 shall be acceptable for service, provided the flaws or areas of degradation are recorded in ac-cordance with the requirements of IWA-1400(h) and IWA-6220 in terms of location, size, shape, orienta-tion, and distribution within the component.
(b) Components whose examination reveals flaws or areas of degradation that do not meet the acceptance standards of Table IWE-3410-1 shall be unacceptable for service unless such flaws or areas of degradation are removed or repaired, to the extent necessary to meet the acceptance standards, prior to placement of the component in service.
IWE-3114 Repairs and Reexaminations Repairs and reexaminations shall comply with the requirements of IWA-4000. Reexamination shall be conducted in accordance with the requirements of IWA-2200; the recorded results shall demonstrate that the repair meets the acceptance standards specified in Table IWE-3410-1.
IWE-3115 Review by Authorities (a) The repair program and the examination results shall be subject to review by the enforcement author-ities having jurisdiction at the plant site.
(b) Evaluation of examination results may be subject to review by the regulatory authority having jurisdiction at the plant site.
IWE-3120 INSERVICE NONDESTRUCTIVE EXAMINATIONS IWE-3121 General Inservice nondestructive examination results shall be compared with recorded results of the preservice ex-amination and prior inservice examinations. Accep-tance of the components for continued service shall be in accordance with IWE-3122, IWE-3124, and IWE-3125.
IWE-3122 Acceptance IWE-3122.1 Acceptance by Examination. Com-ponents whose examination results meet the acceptance standards listed in Table IWE-2500-1 shall be accept-able for continued service. Verified changes of flaws or areas of degradation from prior examinations shall be recorded in accordance with IWA-1400(h) and IWA-6220. Components that do not meet the accep-tance standards of IWE-3000 shall be corrected in ac-cordance with the provisions shown in IWE-3122.2, IWE-3122.3, or IWE-3122.4.
IWE-3122.2 Acceptance by Repair. Components whose examination results reveal flaws or areas of deg-radation that do not meet the acceptance standards list-ed in Table IWE-2500-1 shall be unacceptable for con-tinued service until the additional examination requirements of IWE-2430 are satisfied, and the flaw or area of degradation is either removed by mechanical 228
!WE-3122.2 REQUIREMENTS F-O CLASS MC COMPONENTS IWE-3510.1 methods or the component repaired to the extent nec-essary to meet the acceptance standards of IWE-3000.
IWE-3122.3 Acceptance by Replaicement. As an alternative to the repair requirement of IWE-3122.2.
the component or the portion of the component con-taining the flaw or area of degradation shall be replaced in accordance with IWE-7000.
IWE-3122.4 Acceptance by Evaluation (a) Components whose examination results reveal flaws or areas of degradation that do not meet the ac-ceptance standards listed in Table IWE-3410-1 shall be acceptable for service without the removal or repair of the flaw or area of degradation or replacement if an engineering evaluation indicates that the flaw or area of degradation is nonstructural in nature or has no ef-fect on the structural integrity of the containment.
When supplemental examinations of IWE-3200 are re-quired, if either the thickness of the base metal is re-duced by no more than 10% of the nominal plate thick-ness or the reduced thickness can be shown by analysis to satisfy the requirements of the Design Specifications, the component shall be acceptable by evaluation.
(b) When flaws or areas of degradation are accepted by engineering evaluation, the area containing the flaw or degradation shall be reexamined in accordance with IWE-2420(b) and (c).
(c) When portions of later editions of the Construc-tion Code or Section III are used, all related portions shall be met. The engineering evaluation shall be sub-ject to review by the enforcement and regulatory au-thorities having jurisdiction at the plant site.
IWE-3124 Repairs and Reexaminations Repairs and reexaminations shall comply with the requirements of IWA-4000. Reexaminations shall be conducted in accordance with the requirements of IWA-2200 and the recorded results shall demonstrate that the repair meets the acceptance standards of Table IWE-3410-IWE-3125 Review by Authorities The repair program and the reexamination results shall be subject to review by the enforcement author-ities having jurisdiction at the plant site.
IWE-3130 INSERVICE VISUAL EXAMINATIONS' Components, whose visual examination as specified in Table IWE-2500-1 reveals areas that are suspect, shall be unacceptable for continued service unless, fol-lowing verification of the suspect areas by the supple-mental examination as required by IWE-3200, the re-quirements of IWE-3120 are satisfied.
IWE-3200 SUPPLEMENTAL EXAMINATIONS Examinations that detect flaws or evidence of deg-radation that require evaluation in accordance with the requirements of IWE-3100 may be supplemented by other examination methods and techniques (IWA-2240) to determine the character of the flaw (i.e., size, shape, and orientation) or degradation. Visual examinations that detect surface flaws or areas that are suspect shall be supplemented by either surface' or volumetric ex-amination.
IWE-3400 STANDARDS IWE-3410 ACCEPTANCE STANDARDS The acceptance standards of Table IWE-3410-1 shall be applied to evaluate the acceptability of the com-ponent for service following the preservice examination and each inservice examination.
IWE-3430 ACCEPTABILITY Flaws or areas of degradation that do not exceed the allowable acceptance standards of IWE-3500 for the respective examination category shall be acceptable.
IWE-3500 ACCEPTANCE STANDARDS IWE-3510 STANDARDS FOR EXAMINATION CATEGORY E-A, CONTAINMENT SURFACES IWE-3510.1 Visual Examinations-- General (a) The General Visual Examination shall be per-formed by, or under the direction of, a Registered Professional Engineer or other individual, knowledge-able in the requirements for design, inservice inspec-tion, and testing of Class MC and metallic liners of Class CC components. The examination shall be per-formed either directly or remotely, by an examiner with visual acuity sufficient to detect evidence of degrada-tion that may affect either the containment structural integrity or leak tightness.
(b) Prior to proceeding with a Type A test, condi-tions that may affect containment structural integrity or 229
IWE-3510. I 1992 SECTION Xi -
DIVISION I IWE-3512.2 TABLE IWE-3410-1 ACCEPTANCE STANDARDS Examination Component and Acceptance Category Part Examined Standard E-A Containment surfaces IWE-3510 E-B Pressure retaining welds IWE-3511 E-C Containment surfaces requiring augmented IWE-3512 examination E-D Seals, gaskets, and moisture barriers IWE-3513 E-F Pressure retaining dissimilar metal welds IWE-3524 E-G Pressure retaining bolting IWE-3515 E-P All pressure retaining components
'10 CFR 50, Appendix J leak tightness shall be accepted by engineering eval-uation or corrected by repair or replacement in accor-dance with IWE-3122.
IWE-3510.2 VT-3 Visual Examinations on Coated Areas. The inspected area, when painted or coated, shall be examined for evidence of flaking, blistering, peeling, discoloration, and other signs of distress.
Areas that are suspect shall be accepted by engineering evaluation or corrected by repair or replacement in ac-cordance with IWE-3122. Supplemental examinations in accordance with IWE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3510.3 VT-3 Visual Examinations on Non-coated Areas. The inspected area shall be examined for evidence of cracking, discoloration, wear, pitting, excessive corrosion, arc strikes, gouges, surface dis-continuities, dents, and other signs of surface irregu-larities. Areas that are suspect shall be accepted by engineering evaluation or corrected by repair or re-placement in accordance with IWE-3122. Supplemental examinations in accordance with IWE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3511 Standards for Examination Category E-B, Pressure Retaining Welds 1WE-3511.1 VT-i Visual Examinations on Coated Areas. The inspected area, when painted or coated, shall be examined for evidence of flaking, blistering, peeling, discoloration, and other signs of distress.
Areas that are suspect shall be accepted by engineering evaluation or corrected by repair or replacement in ac-cordance with IWE-3122. Supplemental examinations in accordance with IWE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3511.2 VT-I Visual Examinations on Non.
cuated Areas. The inspected area shall be examined for evidence of cracking, discoloration, wear, pitting, excessive corrosion, arc strikes, gouges, surface dis-continuities, dents, and other signs of surface irregu-larities. Areas that are suspect shall be accepted by engineering evaluation or corrected by repair or re-placement in accordance with IWE-3 122.. Supplemental examinations in accordance with IWE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3512 Standards for Examination Category E-C, Containment Surfaces Requiring Augmented Examination IWE-3512.1 VT-I Visual Examinations on Coated Areas. The inspected area, when painted or coated, shall be examined for evidence of flaking, blistering, peeling, discoloration, and other signs of distress.
Areas that are suspect. shall be accepted by engineering evaluation or corrected by repair or replacement in ac-cordance with IWE:3122. Supplemental examinations in accordance with IWE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3512.2 VT-I Visual Examinations on Non-coated Areas. The inspected area shall be examined for evidence of cracking, discoloration, wear, pitting, excessive corrosion, arc strikes, gouges, surface dis-continuities, dents, and other signs of surface irregu-larities. Areas that are suspect shall be accepted by engineering evaluation or corrected by repair or re-placement in accordance with IWE-3122. Supplemental 230
IWE-3512.2 REQUIREMENTS FOR CLASS MC COMPONENTS 1WE-3515.2 examinations in accordance with [WE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3512.3 Ultrasonic Examination. Containment vessel examinations that reveal material loss exceeding 10% of the nominal containment wall thickness, or ma-terial loss that is projected to exceed 10% of the nom-inal containment wall thickness prior to the next ex-amination, shall be documented. Such areas shall be accepted by engineering evaluation or corrected by re-pair or replacement in accordance with IWE-3122.
Supplemental examinations in accordance with IWE-3200 shall be performed when specified as a result of the engineering evaluation.
IWE-3513 Standards for Examination Category E-D, Seals, Gaskets, and Moisture Barriers IWE-3513.1 VT-3 Visual Examinations. Seals, gaskets, and moisture barriers shall be examined for wear, damage, erosion, tear, surface cracks, or other defects that may violate the leak-tight integrity. De-fective items shall be repaired or replaced.
IWE-3514 Standards for Examination Category E-F, Pressure Retaining Dissimilar Metal Welds IWE-3514.1 Surface Examinations. The accep-tance standards of IWB-3514 shall apply within the ex-amination boundary of Fig. IWE-2500-1.
IWE-3515 Standards for Examination Category E-G, Pressure Retaining Bolting IWE-3515.1 Visual Examinations. Bolting mate-rials shall be examined in accordance with the material specification for defects which may cause the bolted connection to violate either the leak-tight or structural integrity. Defective items shall be replaced.
IWE-3515.2 Bolt Torque or Bolt Tension. Either bolt torque or bolt tension shall be within the limits specified for the original design. If no limits have been specified, acceptable bolt torque or bolt tension limits shall be determined and utilized.
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