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PROCEDU RE NO.
REVISION NO.
EF FECTIVE DATE PAGE O
2.13 0
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NUCLEAR CONSTRUCTION DIVISION REVIEWED BY
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PROCEDURE AFFECTS:
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ADM.
CONST.i TITLE V'
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MANAGEM NTP C " RES ASME SECTION XI INTEGRATED PRESERVICE j
)l INSPECTION PROGRAM A.MANAGEf
/ OATE APP VED 0 SUEnd.%
6-27 84 PROJECT M AGER DATE LIST OF EFFECTIVE PAGES DATE REVISION NUMBER i
1-25 06/22/84 0
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PROCEDURE NO.
2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM
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TABLE OF CONTENTS Page 2
1.0 PURPOSE AND SCOPE 2.0 APPLICABILITY
3.0 REFERENCES
4.0 DEFINITIONS 5.0 ORCANIZATION AND RESPONSIBILITIES 6.0 PRESERVICE INSPECTION PROGRAM 6.1 General Requirements and Basis for PSI Program 6.2 Quality Assurance 6.3 Repair and Replacement Plans
-O 6.4 Requirements for Class 1 Components 16. 5 Requirements for Class 2 Components 6.6 Requirements for Class 3 Components 6.7 Component Supports 6.8 Pump Testing 6.9 Valve Testing 6.10 PSI Program Relief Requests 7.0 RECORDS AND DATA MANAGEMENT 8.0 FIGURES i
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PROCEDURE NO.
2.13 TITLE: ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM Q
V l.0 PURPOSE AND SCOPE The purpose of this document is to provide the Preservice Inspection (PSI)
Program fo r piping systems, compon ent s, and supports installed at Beaver Valley Power Station - Unit No. 2 (BVPS-2). This Program has been written to meet the requirements specified by the Code of Federal Regulations 10CFR50.55a ; 10CFR50 Appendix J ; and DLC Positions to applicable USNRC Regulatory Guides speci fied herein.
It also incorporates BVPS-2 Final Safety Analysis Report (FSAR) commitments for PSI.
2.0 APPLICABILITY l
This integrated PSI ~ Program is applicable to BVPS-2 during the Design /
Construction Phase.
3.0 REFERENCES
3.1 Code of Federal Regulations Title 10, Section 50.55a, " Codes and Standards" (Current) a.
p b.
Title 10, Section 10CFR50, Appendix J, " Primary Reactor Contain-q]
ment Leakage Testing for Water-Cooled Power Reactors" (Current) 3.2 BVPS-2 FSAR Section 3.2.2, " System Quality Group Classifications" a.
(Amendment 5) b.
Section 3.6, " Protection Against Dynamic Ef fects Associated with the Postulated Rupture of Piping" (Amendment 4) c.
Section 5.2.4,
" Inservice Inspection and Testing of Reactor Coolant Pressure Boundary" (Amendment 2) d.
Section 5.3.1.3, "Special Methods for Nondestructive Examination" regarding Reactor Vessel NDE ( Amendment 3)
Section 5.4.1.5.2, " Fabrication and Inspection" regarding Reactor e.
Coolant Pump Flywheel NDE (Amendment 2) f.
Section 5.4.2.2, " Steam Generator Inservice Inspection" (Amend-ment 3) g.
Sec t ion 6.6,
" Inservice Ins pect ion of ASME Code Class 2 and 3 Components" (Amendment 5)
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PROCEDURE No.
2.13 TITLE:
ASHE SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM 3.3 USNRC Regulatory Guides 1.14, " Reactor Coolant Pump Flywheel Integrity" (Rev. 1) and a.
R.G.
BVPS-2 Licensing Position to R.G.
1.14, Rev. I b.
R.G.
1.83, " Ins erv ice Inspection of Pressurized Water Reactor Steam Generator Tubes" (Rev. 1) and BVPS-2 Licensing Position to R.G. 1.83, Rev. I c.
R.G.
1.147, " Inservice Inspection Code Case Ac cep t ability, ASME Section XI, Division 1 (Rev. 2) and BVPS-2 Licensing Position to R.G. 1.147, Rev. 2 d.
R.G. 1.150, " Ultrasonic Testing of Reactor Vessel Welds During Preservice and Inservice Examinations" (Rev.
1) and BVPS-2 Licensing Position to R.G. 1.150, Rev. 1 3.4 ASME Section XI Code, " Rules for Inservice Inspection of Nuclear l
l Power Plant Components" PSI Basis Code (80W80) a.
b.
Table IWF-2500-1 (80W81) and IWA-2300 (80W81)
,s IWC-1220; Table IWC-2520, CF and CG
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c.
3.5 Duquesne Light Company Procedures / Plans NCDP 1.13, "Preservice and Inservice Inspection Programs" a.
(Rev. 0) b.
NCDP 2.13.1, "ASME Section XI Repair and Replacement Plan" (Rev.
1) c.
NCDP 2.13.2, "ASME Section XI Preservice Inspection Plan for Class 3 Pressure Retaining Components" (Rev. 0) d.
NCDP 2.13.3, "ASME Section XI Preservice Inspection Plan for Component Supports" (Rev. 0) e.
NCDP 2.13.4, "ASME Section XI Preservice Inspection Plan for Snubbers" (Rev. 0) f.
DLC Specification No. NDS-0064, "Preservice Eddy Current Inspec-tion of the BVPS Unit 2 Steam Generators" (Rev. 0) g.
NDE/ ADMIN-6, "ASME Section XI Preservice Inspection Site Quality Control Plan" h.
OSUM Chapter 24, "ASME Section XI Pump and Valve Test Plan"
- i. DLC Design and Construction Quality Assurance Program, Appendix C PAGE 3 0F 25
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2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM fS 3.6 Other Project Procedures / Plans a.
Westinghouse Plan:
DMW-PSI-100, " Beaver Valley Unit No. 2 Pr e-service Examination Program Plan (EPP) b.
Westinghouse Procedure:
DMW-ISI-101, "Preservice and Inservice Inspect'on Documentation" c.
Wes ting nouse Procedure:
DMW-ISI-154, "Preservice and Inservice Examination in Reactor Vessel" d.
Westinghouse Procedure:
DMW-ISI-47, " Manual Ultrasonic Examina-tion of Welds in Vessels" e.
Westinghouse Procedure:
DMW-ISI-206, " Manual Ultrasonic Examina-tion of Welds" f.
Westinghouse Procedure:
DMW-ISI-147, " Manual Ultrasonic Examina-tion of Welds in Reactor Vessel" 4.0 DEFINITIONS The de finit ions ident ified in ASME Section XI, Subsubarticle IWA-2110 are invoked by this PSI Program.
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2.13 TITLE: ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM es
%d 5.0 ORGANIZATION AND RESPONSIBILITIES 5.1 Responsibilities 5.1.1 Quality Assurance (QA) Manager The QA Manager is responsible to the Nuclear Group Vice Presi-dent for the overall administration of the PSI Program during the Design / Construction Phase, including the assignment of the PSI Program director.
5.1.2 PSI Program director The PSI Program director is responsible for overall direction and coordination of the PSI Program during the Design / Con-struction Phase, including establishing assurance of compat i-bility of the PSI Program with the ISI functions.
5.1.3 PSI Site supervisor The Site supervisor is responsible to the PSI Program director for on-site coordination with interf acing organizations during
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the development and implement at ion of the PSI Program during the Design / Construction Phase.
5.1.4 Engineering Department, Nuclear Construction Division (NCD)
The NCD Engineering Department, through the Engineering Mana-ger, is res ponsible for the technical support in the prepara-tion of the PSI program.
Included in these res ponsib ilit ies are:
assignment of Engineering personnel to the PSI Program Team, coordination of Technical Consulting Services, technical approval of Repair / Replacement Plan activities, and technical interface with DLC Licensing for submit tals of PSI Program documents to the NRC.
5.1.5 PSI Program Team The PSI Program Team, chaired by the PSI Program director, is comprised of a working group of representatives from DLC or-ganizations involved in the development and implementation of the PSI Program.
These representatives include:
the Site s upe rviso r, QA, Site Quality Control (SQC), Start-Up, and Engineering.
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2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM 5.2 Organization 5.2.1 The PSI Program Functional Organization is shown in Figure 2.13-1.
Included in this figure are interf acing organization and major functional responsibilities.
5.2.2 The PSI Program Document Matrix, shown in Figure 2.13-2 identifies program plans, procedures (by type),
and organizations respons ib le for development and impleme nt at ion of these plans and procedures.
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2.13 TITLE: ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM i
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6.0 PRESERVICE INSPECTION PROGRAM 6.1 General Requirements and Basis for PSI Program 6.1.1 Definition of Owner's Intent i
i In accordance with the requirements set forth in 10CFR50.55a, BVPS-2 must comply with requirements of the 1971 Edition of Sect ion XI, with ad de nda through Winter 1972.
In order to l
comply with more recent codes and addenda, Duque sne Light Company (DLC) has elected to comply with the 1980 Edition of Section XI, with ad de nda through Winter 1980 (80W80);
here-after referred to as the " Code" or "Section XI".
10CFR50.55a allows use of the 1980 Edition of Section XI, with addenda through Winter 1981 (80W81).
However, since the 80W80 code has already been committed to by the BVPS-2 FSAR and other plant documents, DLC has elected to ut ilize the 80W80 code and addenda as the PSI Basis document for the overall Section XI Program.
R.G.
1.147, Rev. 2 may be utilized by DLC as applicable (Reference 3.3.c).
N 6.1.2 System Boundaries Subject to Inspection The boundaries of Code Class 1,
2, and 3 systems subject to inspection by the Rules of Section XI are defined in accord-ance with the BVPS-2 FSAR (Reference 3.2.a).
Safety classes
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are included in of components in the fluid system boundaries Table 3.2.1 of the FSAR. The system flow diagrams, as well as piping system isometric drawings, identify these class breaks.
Flow diagrams are contained in the FSAR.
Unless otherwise noted, Quality Group A is equivalent to Class 1, Group B is equivalent to Class 2, and Group C is equivalent to Cl ass 3.
In accordance with IWA-2200, the preservice examinations of Class 1, 2, and 3 components will conform with those invoked f
l by IWB, IWC, and IWD-2500 of Section XI.
Class 1, 2, and 3 component suppo rt s ident ified as ASME Section III, Subsection NF will be examined in accordance IWF-2500 and Sect ion 6.7 o f this Program.
Non-NF component supports which were designed and fabricated to the " code in effect" prior to 71W73 ASME III will be examined in accordance with Section 6.7 of this l
Program.
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2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM p) tV 6.1.3 Pump Testing Class 1,
2, and 3 pumps will be tested in accordanca with Section 6.8 of this Program.
6.1.4 Valve Testing Class 1,
2, and 3 valves will be tested in accordance with Section 6.9 of this Program.
6.1.5 Accessibility Provisions for ac cessibility to perform PSI examinations are in ac cordance with Sec t ion XI, IWA-1500.
Any ac ces sibility limitations will be ident ified as they are encountered by specific relief request.
6.1.6 Examination Procedures Preservice inspection on BVPS-2 will be performed using proce-dures which comply with the requirements of IWA-1400(d), (e),
(h), (i), (m), (o), and IWA-2200. Written procedures prepared l'v')
by outside or Contractor NDE organizations require review and approval by DLC prior to use. Volumetric, surface, and visual methods of examination are generic terms, each pe rmit t ing a
allowed by Section selection of techniques and procedures as XI.
6.1.6.1 Visual Examination Visual examinations required by Section XI will be performed using procedures which satisfy IWA-2 210.
Direct visual cae thods will be used to the extent pract ical.
However, remote visual examinations may be used.
6.1.6.2 Surface Examination Sur f ac e examinations required by Section XI will be performed using techniques which comply with the requirements of IWA-2220.
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'v' 6.1.6.3 Volumetric Examination A.
Volumetric examinations required by Section XI will be pe r fo rmed in accordance with IWA-2230 using manual ultrasonic (UT) t e chniques in nost cases.
Required volumetric examination of reac-tor vessel welds will be performed using an auto-mated UT device (Re fe rence 3.6.c), with limited usage of manual ultrasonic examination (Ref erence 3.6.f).
Refer to Paragraph 6.1.11.1 of this procedure for limitations applying to ult rason ic examinations.
B.
Steam generator tubing will be examined using the eddy current method (Reference 3.5.f) 6.1.6.4 Alternative and_ Supplemental Examinations A.
General In accordance with IWA-2240, alternative examina-t ion me thods, a combination of methods, or newly lL developed techniques may be subs t itut ed for the methods specified in Section XI, provided the Authorized Nuclear Inservice Inspector (ANII) concurs that the results are demonstrated to be superior to those of the specified equivalent or method.
Visual examinations that detect surface flaws shall be supplemented by either surf ace or volu-metric examinations fo r Class 1,
as allowed by IWh-3200.
When further evaluat ion of result s is necessary, other NDE methods may be employed to supplement the required examinations.
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6.1.7 Personnel Qualification Personnel pe rf orming nondestructive examinat ion (NDE) opera-t ions shall be qualified in accordance with IWA-2300 of Sec-tion XI.
Outside organizations and other personnel available within DLC may be qualified to later Editions / Addenda of Sec-tion XI and may be utilized to perform NDE for BVPS-2.
DLC recognizes the existence of the 80W81 Section XI invoking certification of NDE personnel to the 1980 Edition of SNT-TC-1A (versus the 1975 Edition invoked by the above) and will accept certification of personnel to this later code.
For those NDE methods (e.g. VT-1) not covered by SNT-TC-1A documents, training and qualification shall be of comparable levels of competency by utilization of comparable examinations on the particular method involved. Other NDE personnel quali-fication (e.g. VT-2, VT-3, VT-4, and Tes t Functions) will be performed in accordance with the DLC Site Quality Control Training Manual through the DLC NDE/ ADMIN-6, "ASME Section XI Preservice Inspection Site Quality Control Plan" (Reference 3.5.g), hereaf ter referred to as the SQC Plan.
O 6.1.8 Recording / Characterization of Indications V
All recordable indications will be recorded and investigated by a Level II or Level III examiner.
Flaw indications will be characterized in accordance with IWA-3300.
In accordance with the requirements of IWA-1400(h), IWA-6220, and IWB-3112, indications are to be recorded in terms of loca-tion, size, shape, orientation, and distribution within the component.
This recording requirement also applies to ultra-sonic indicat ions of geometric or metallurgical origin deter-mined in accordance with IWB-3514.5.
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6.1.9 Evaluation and Reporting of Results 6.1.9.1 Flaw indications detected during PSI will be evalua-
.ted in accordance with IviB-3000.
Supplemental exam-inations may be used to assist in determination of locat ion, size, shape, and orientation of a flaw indication.
Results of all examinations will be noted as Report able Indicat ion (RI), No Reportable Indicat ion (NRI), or No Indication (NI), as defined in the SQC Plan (Reference 3.5.g).
6.1.9.2 If the disposition of a flaw indication identifies a
or replacement of the defect which requires repair component containing the defect, such act ivities will be pe r fo rmed under a Plan (described in Para-graph 6.3) regarding Repairs and Replacements, after which it will be re-examined.
The disposition of all de f e c t s, their repair, and the re-examination results shall be subject to review by the ANII.
6.1.10 Calibration 6.1.10.1 Instrumentation / Equipment Instrumentation / equipment calibration shall be de-fined in the applicable DLC approved procedure (s).
6.1.10.2 C_alibration Standards / Calibration Blocks Calibration standards / calibration blocks shall com-ply with the appropriate Code Article to the extent practicable.
When DLC encounters problems in Code Compliance regarding material availability or physi-cat size, etc., the actual or as-built calibration standard will be demonstrated acceptable in accord-ance with IWA-2240.
Calibration standards shall be maintained by DLC.
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6.1.11 Ex_emptions and Limitations The.following exempt ions fr om, and limitations to examination i
requirements are applicable to Class 1, 2,
and 3 components, and their supports:
I 6.1.11.1 Limitation on UT Examination of Austenitic Materials Material properties (e.g.
grain structures) may limit capabilities to ultrasonically examine austenitic stainless steel materials.
Results of l
NRC spons ored studies on UT inspect ability may be used to assess the scope and extent of the problem.
Limitations to examinations employed will be noted in the record of examinations.
6.1.11.2 Personnel Qualifications Ins pect ion pe rsonnel qualifications to SNT-TC-1A, 1980 are allowed in lieu of SNT-TC-1A,1975 qualif t-l cations required by this Code.
r 6.1.12 Hydrostatic Tasting
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x An ASME Section XI Preservice hydrostatic test is not required in accordance with IWA-5215.
All components will have undergone an ASME III system hydrostatic test when the system has been certified by N-5 Data Report.
The visual examination requirements for ASME Section XI (VT-2) are met by the hydrostatic test and accompanying visual exam-I ination performed in accordance with ASME Section III.
6.2 QUALITY ASSURANCE The PSI Program will be in compliance with the requirements of the DLC Design and Construction Quality Assurance Program, Appendix C (Reference 3.5.i), which complies with Appendix B of 10CFR50.
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2.13 TITLE:
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6.3 REPAIR AND REPLACEMENT PLAN 6.3.1 The Repair and Replacement Plan will be in accordance with DLC Procedure NCDP 2.13.1 (Re ference 3.5.b) which implements Sec-tion XI, IWA-4000 and IWA-7000.
6.3.2 This Plan establishes the criteria, functions, assignment, and responsibilities of DLC organizations, interfacing other site outside organizations, and personnel involved in repair and replacement per f o rmed to the requirements of ASME Section XI during the Design / Construction Phase.
6.3.3 This Plan includes repair and replacement of any piping system and associated supports which have been fully certified on an N-5 Data Report and fo r any component and associated supports constructed to ASME Section III, Class 1, 2, 3, MC, and Code "N" or "NV" stamped.
6.4 REQUIREMENTS FOR CLASS 1 COMPONENTS 6.4.1 General Requirements for Class 1 Components The preservice examinations of Class 1 component s will be
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performed in accordance with IWB-2200 and IWB-2500 and will be
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those examinations identified in Table IWB-2500-1.
Speci fic examinations under each examination category are identified by an item number which directly correlates to Table IWB-2500-1.
Specific equipment to be examined is listed in DMW-PSI-100,
" Beaver Valley Unit No. 2 Preservice Examination Program Plan (EPP)" (Reference 3.6.a), hereafter referred to as the EPP.
In accordance with IWB-2100, the examinations shall be wit-nessed or otherwise verified by the ANII.
6.4.2 Exemptions and Limitations Components will be exempted in accordance with IWB-1220 from volumetric and surf ace examination requirements identified in IWB-2500.
In Table IWB-2500-1, Categories B-L-2 and B-M-2 require a VT-3 examination of internal surfaces for pump casings and valve bodies exceeding 4-inch nominal pipe size. The final manuf ac-turing Quality Assurance data from the Supplier, and/or final site assembly Quality Assurance documents will be accep t ab le as preservice inspection data for these items per IWB-2200(b).
This data will be retrievable from QA Records, and will be included in the PSI Report.
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2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM J
6.4.3 Reactor Vessel Examination 6.4.3.1 The au toma t ic and manual ultrasonic examinat ion of the Reactor Vessel are identified in the EPP and the UT examinations incorporate the DLC Licens ing Posi-tion on R.G. 1.150, Rev. 1 (Reference 3.3.d).
The EPP identifies each UT examination area by Table IWB 2500-1 item numbe r, category, and specific descrip-tion.
6.4.3.2 Procedure DMW-ISI-154, "Preservice and Inservice Examination in Reactor Vessel" (Reference 3.6.c) describes the equipment, calibration sequence, exam-inat ion techniques, and specific recording require-ments for preservice UT inspection using the remotely operated inspection tool.
6.4.3.3 Procedure DMW-ISI-147, " Manual Ultrasonic Examination of Welds in Reactor Vessel" (Reference 3.6.f) defines requirements for manual UT examination of applicable po rt ions of the Reactor Vessel, identified in the EPP.
6.4.3.4 Sur f ace and visual examination requirements and pro-7_s cedures utilized for the Reactor Vessel are id e nt i-
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fied in the EPP.
6.4.4 Examination of Pressure Retaining Boundarv for Class 1 Pumps, Valves, and Vessels 6.4.4.1 Procedure DMW-ISI-47, " Manual ' Ultrasonic Examination of Welds in Vessels" (Re fe rence 3.6.d) defines the requirements for manual ultrasonic examination of full penet rat ion longitudinal and circumferential pressure retaining welds in ferritic vessel material (wrought or cast) greater than 2 inches thick.
This procedure applies to portions of the Pressurizer and Steam Generator as identified in the EPP.
6.4.4.2 Procedure DMW-ISI-206, " Manual Ultrasonic Examination of Welds" (Reference 3.6.e) defines the requirements for manual ultrasonic examinat ions of full pe ne t ra-tion circumferential and longitudinal butt welds and adjacent base materials of these and fillet or corner welds.
It is applicable to such welds in piping systems (.25 inch to 6 inches thick) and vessel material (.25 to 2 inches thick) in ferritic or austenitic steels of either wrough t or cast product forms.
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2.13 TITLFa ASME'Sf,0 TION XI INTEGRATED PRESERVICE s
INSPECTION PROGRAM (3^
V sj 6.4.4.3 The EPP identifies the specific applicability of UT s
examinations fo r ve s s'e ls, as well as ident ifies s pe-l cific surface examinatiot4s for vessels, pumps, and valves.
6.4.5 Class 1 Piping Examination 6.4.5.1 Procedure DMW-ISI-206 (Reference 3.!6.e) willbe
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utilized to perform manual UT examinations of Class 1 piping welds as specifically identified in the'EPP.
6.4.5.2 The EPP identifies the specific applicability L-surface examination for Class 1 piping welds, l
6.4.6 Bolting Examination s
The EPP identifies specifi: volumetric and surface exami na-tions for bolting (including studs).
6.4.7 Steam Generator Tube Examination DLC will pe r form Preservice Inspect ion on 100% of the steam
]v generator tubing using eddy current tech niques.
This ins pec-tion will be performed after completion of the field hydro-static test and prior to initial power operation.
St e am ge n-erator tubing examination will comply %ith the DLC Position on USNRC Regulatory Guide 1.83, Revision 1. (Reference 3.3.b).
Specific requirements for steam generator ' tubing eddy current t
l examinntion will be pr'ovided by DLC ' Specification No. NDS-I 0064, "Preservice Eddy Current Inspection of the BVPS Unit 2 i
Steam Generators" (Reference ' 3.5. f).
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6.4.8 Augmented Inspections and Examinations j
6.4.8.1 Reactor Coolant Pump Flywheels f
Although not part of a pressure boundary, the Reactor f
Coolant Pump flywheels will receive an inspect ion in accordance with the DLC Position on USNRC Regulatory Guide 1.14, Revision 1 (Reference 3.3.a).
Preservice inspection will consist of an insitu ultrasonic exam-E ination of the flywheel. This examination is limited an interrogation of bore and keyway which will be to performed from the flywheel gage holes and the peri-phery of each flywheel plate. A magnetic particle or liquid pe net r ant inspection of the machine finished f
bores and keyways will be pe r formed if the flywheel is disassembled from the motor.
The vendor shop i
records may serve to provide the preservice baseline data record, if av ailab le.
Volumetric and surface examinatione will be performed by procedures identi-fled in the EPP.
i 6.5 REQUIREMENTS FOR CLASS 2 COMPONENTS e
- A 6.5.1 General PSI Requirements for _ Class 2 Components k_.)
The preservice examinations of Class 2 c omponent s will be for performed in accordance with IWC-2200 and IWC-2500, except piping welds in the Residual Heat Removal (RHR), Emergency Core Cooling (ECC), and Containment Heat Removal (CHR) Sys-As required by 10CFR50.55a(b)(2)(iv), the piping welds tems.
in these systems will be determined by the requirements of Paragraph IWC-1220; and examined to the extent defined in IWC-2100 and Table IWC-2520, Examination Categories C-F and C-G,
of the 74S75 Code.
Specific examinations under each examina-tion category are identified by an item number in Table IWC-l 2500-1 (80W80 code).
Specific equipment to be examined is listed in the EPP.
6.5.2 Exemptions and I. imitations Component s, except those ident ified by the Augmented Inspec-t ion below, will be exempted in accordance with IWC-1220 of the applicable Code.
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INSPF.GTION PROGRAM,
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6.5.3 Examination of Pressure Retaining Boundary for Class 2 Pump,__
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Valves, and Vessels 6.5.3.1 Procedure DMW-ISI-47 (Reference 3.6.d) and DNW-ISI-206 (Reference 3.6.e) are applicab! e for UT EEamina-tion of Class 2 Vessels.
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6.5.3.2 The EPP identifies the )pecific a'ppl iiab ility fo r surface examination for pumps', valves, and vessels.
6.5.4 Class 2 Piping Examination I
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6.5.4.1 Procedure DMW-ISI-206 (Referen'ce 3.'6.eP iqjapplicable for UT Examination of Class 2' piping welds.
6.5.4.2 The EPP identifies th'e specific applicability fo r ' v -
sur f ace examinat ion for Clas s?, pi ping' we,lds.
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6.5.5 Bolting Examination P
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The EPP identifies specific volume tric examinations for bolt-
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ing (including studs).
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6.5.6 Augmented Inspections and Examination _s' f l, 4
6.5.6.1 In accordance with the' requirements of the ;JSAR.
(References 3.2.b and 3. 2.g)', those port ions of non-exempt systems identified by Paragraph 6.5.1 abdve,.-
which are at containment pe ne t t er t ions, will -receive a 1007. volumetric examinatioat Th'is. ins pect icu will apply to high energy piping cneponent.4 ' de fined as
.j those which are required to oferatd~ abo se,. 2?5 psig or -j,,
i above 200*F.
The extent.of ex2rtination, sill be,,. ap, c plicable to those welds e int,ide and ou t s idq co'u t gin-ment between and inc ludinh ;the' cont ainmsntj iso Utt ioq valves.
Specific equi ~pinent to be examined is list ed
./', '<
in the EPP.
s r~,,
~
J
[
,.. y" w
REVISION: 0 rdGE 17_OF 25
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l's-
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t,
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h
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,f a e 4
_f
,F
.s PROCEDURE NO.
2.13 TITLE:
ASME SECTION XI
~
INTEGRATED PRESERVICE INSPECTION PROGRAM q
NM 6.6 Requirements for Class 3 Components 6.6.1 General PSI Requirements for Class 3 Components
~
The preservice examinations of Class 3 c ompo nent s will be performed in accordance with IWD-2100 and IWD-2600, and will be those examinations identified in Table IWD-2500-1.
Speci-fic examinations unde r each examinat ion category are id e nt i-fied by an item number in Table IWD-2500-1.
Speci fic equip-ment to be examined is listed in DLC Procedure NCDP 2.13.2, "ASME Section XI Preservice Inspection Plan for Class 3 Pres-sure Retaining Components" (Re ference 3.5.c) and the examina-tion will be implemented in accordance with the DLC SQC Plan (Reference 3.5 g).
6.6.2 Exemptions and Limitations i
l e
(
Integral attachments of supports and restraints for components will be exempted in accordance with IWD-1220.
l Tlj.,.
6.7 Component Supports
<fu/
6.7.1 General PSI Requirements for Class 1,
2, and 3 Component
' Supports _
Although the BVPS-2 Plant Design Basis for component suppo rt s is not to ASME Section III Subsection NF, some component sup-t ports " Code in E f fect" are later than W7 3 Addenda, therefore, both NF and Non-NF applications are addr es sed in this PSI Program.
Both NF and Non-NF suppo rt s will rece ive a preser-vice examination in accordance with Subsection IWF.
At DLC discretion, the Cons truct ion Code may be utilized fo r final
,f1 acceptance of Non-NF suppori...
($
preservice examinat ion in accordance 9:
- r Suppo rt s will receive a with IWF-2500 which invokes the examination categories and methods of examinations listed in Tables IWF 2500-1 and IWF-
[i,,'
2500-2.
However, for consistency with the Class 1, 2, and 3 t able s, examination categories and item numbers will be those s
shown in Table IWF-2500-1 of the 80W81 Code.
Specific equip-g, ment to be examined for component suppo rt s and snubbers is W
listed in DLC Procedures NCDP 2.13.3 and 2.13.4 (References 3.5.d and 3.5.e) and the examination will be implemented in the DLC SQC Plan (Reference 3.5.g).
PAGE 18 0F 25 REVISION:
0 p)g
PROCEDURE NO.
2.13 TITLE: ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM
(
)
Q,i 6.7.2 Exemptions and Limitations 6.7.2.1 Component suppo rt s (except snubbers) exempt from examination shall be those supports of the Class 1, 2,
and 3 components which are exempted by the rules J
of Section XI, Subsections IWB, IWC, and IWD, res pec-tively.
6.7.2.2 Snubber testing is required in accordance with Arti-cle IWF-5000.
The final manufacturing Quality Assur-ance data from the Supplier, and/or final site as-sembly Quality Assurance documents will be acceptable as Preservice Inspection data in accordance with IWF-
- 5200, as defined in DLC Snubber Plan (Re fe rence 3.5.e).
6.8 PUMP TESTING _
6.8.1 PSI Requirements for Pump Testing l
Class 1, 2, and 3 pumps will be tested in accordance with IWP-3000 and IWP-4000 of Section XI, and OSUM Chapter 24, "ASME
(')
Section XI Pump and Valve Test Plan (Reference 3.5.h) to V
measure or observe the following:
Speed
- Inlet Pressure
- Differential Pressure
- Flow Rate
- Vibration Amplitude
- Proper Lubricant Level or Pressure
- Bearing Temperature Specific pumps to be tested are as referenced in the Pump Portion of this Plan (Reference 3.5.h), as well as the listing of Pump Testing Procedures, methods of Pump Test Data Collec-tion, Pump Data Review, and Records retention and retrieval.
6.8.2 Ext ptions and Limitations Exemptions and limi t at ions identified in the Pump Testing Portion of this Plan are in compliance with IWP-1200.
REVISION:
0 PAGE 19 0F 25 pY]
PROCEDURE NO.
2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM p
6.9 VALVE TESTING 6.9.1 PSI Requirements for Valve Testing will be tested in ac cordance with Class 1,
2, and 3 vals *-
IWV-3000 and OSUM Chapte.- 24, "ASME Section XI Pump and Valve Test Plan (Reference 3.5.h) to measure or observe the fo llow-ing:
- Valve Operability (excluding check valves) Testing
- Valve Leak Rate Testing
- Safety Valve and Relief Valve Set Points Testing
- Check Valve Operability Testing 6.9.2 Augumented Valve Testing Requirements In accordance with 10CFR50, Appendix J, the primary reactor containment shall comply with the containment leakage tes t requirements as specified in this Appendix.
The PSI Program will include Type C testing of valves in accordance with Ap-pendix J,Section III.C.
l
[]
6.9.3 Specific valves to be tested are as referenced in the valve i
V portion of this Plan (Reference 3.5.h), as well as the listing l
of valve testing procedures and methods of:
Valve Data Col-lection, Valve Data Review, and Record retention and re-trieval.
6.9.4 Exemptions and Limitations Exemptions and limitations ident ified in the Valve Testing Fortion of this Plan are in compliance with IWV-1200.
l I
l REVISION: O PAGE 20 0F 25 (qJ
r-PROCEDURE NO.
2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM V^
6.10 PSI PROGRAM RELIEF REQUESTS In accordance with the requirements of 10CFR50.55s(g), as clarified i
. by the NRC in 'tuidance for Preservice and Inservice Inspection Pro-f gram and Relief Requests Pursuant to 10CFR50.55a(g)", Relief Requests
'will be - ident ified during PSI examinations, prepared in accordance l
with the NRC fo rmat (referenced above), and submitted subsequent to the examination.
Where Relief Requests are ident ified prior to the PSI examination, the submittal will be made prior to the examination whenever possible.
I i
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P p) u i
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REVISION: O PAGE 21 0F 25
+
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,4
.-._,..-.---,.-,,,,y-
PROCEDURE NO.
2.13 TITLE:
ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM
.r].)
7.0 RECORDS AND DATA MANAGEMENT 7.1 Records of the P r es e rv ice Inspection Plan; schedules; calib rat ion standards; examination results and reports; and cor rect ive actions required and taken, will be developed and maintained at BVPS-2 in
/
accordance with IWA-6000 of Section XI and ANSI N4 5. 2. 9-19 74, as identified in DLC PSI specific Plans (Re ferenc es :
- 3. 5.b,
3.5.c, 3.5.d, 3.5.e, 3.5.f, 3.5.g, and 3.5.h).
7.2 The general examination documentation for Class 1 and Class 2 compo-nents will be in accordance with the vendor approved documentation program which has been reviewed and approved by DLC.
U.n REVISION: 0 PAGE 22 0F 25 v
PROCEDURE NO.
2.13 TITLE: ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM
(-
8.0 FIGURES AND ATTACHMENTS 8.1 FIGURES
\\
8.1.1 Figure 2.13-1, "Pr es ervice Inspection Program Functional Or-ganization" 8.1.2 Figure 2.13-2, "Preservice Inspect ion Program Document Matrix" O
1 I
REVISION: O PAGE 23 0F 25
PROCEDURE No.
2.13 TITLE: ASME SECTION XI INTEGRATED PRESERVICE INSPECTION PROGRAM f3
(,,)
PRESERVICE INSPECTION PROGRAM FUNCTIONAL ORGANI'ATION Z
QA l
MANAGER
- Administration PSI PSI ENGINEERING PROGRAM PROGRAM DEPARTMENT director TEAM
- Outside Tech.
- Chairman, PSI
- Working Consulting Services Program Team Group (QA
- DLC Engrg. Tech.
- Overall Direction QC, Site Support Services and Coordination
- Supvr,
- Licensing Interface of PSI Program Engrg, and
(\\~)'
- Data Management Onsite Planning Start-Up)
Suppset Services
- Overall Records Management Rr, pair / Replace Tech. Activities
- Non-DLC Engrg.
Activities SITE supervisor DLC Organization (QC, Start-Up, Engrg)
Contracted Outside PSI Services
- ANII
- Construction
- Evaluation of PSI Data Scheduling Coordination FIGURE 2.13-1 (From Procedure 1.13)
NOTE: Listing under the above organization elements represent functions and interface REVISION:
O PAGE 24 0F 25
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c7.io eressere aetelelee om-ponents 137.
C7.ll Pressure Retaining Com-(2) ponents RESIDUAL HEAT EXCHANGERS 1A & 1B 2-1120 138.
C1.10 Circumferential Shell Weld 206 1A-l 2-1120 139.
C1.20 Circumferential Head Weld 206 18-2 4
2-1120 140.
C1.30 Tubesheet to Shell Welds (10) 2-1120 i
(7)
C2.10 Nozzle in vessel Welds 141.
C2.20 Nozzle in Vessel Welds greater than 1/2 inches nominal thickness j
2-1120 142.
C2.21 Nozzle to Shell Welds lA-3 206 11 and 18-4 2-1120 143.
C2.22 Nozzle Inside radius section (7) f 6/22/84
PROGRAM IWC-2500-1 EXAMINATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol.
Sur.
Vis.
RESIDUAL HEAT EXCHANGERS 1A & 1B 2-1120 (7)-
144.
C3.10 Integrally Welded Attach-ments 2-1120 145.
C4.10 Bolts and Studs (7)
(5) 146.
C7.10 Pressure Retaining Com-ponents (2) 147.
C7.ll Pressure Retaining Com-ponents SEAL WATER HEAT EXCHANGER 2-1130 148.
Cl.10 Circumferential Shell Weld 1 (8) 11 149.
C1.20 Circumferential Head Weld 2 (8) 11 2-1130 2-1130 150.
C1.30 Tubesheet to Shell Welds (10)
O 2-1130 (7) 151.
C2.10 Nozzle in Vessel Welds C2.20 Nozzle in Vessel Welds 2-1130 152.
C2.21 Nozzle to Shell Welds (7)
(7) 2-1130 153.
C2.22 Nozzle Inside Radius Section (7) 2-1130 (7) 154.
C3.10 Integrally Welded Attach-ments 2-1130 155.
C4.10 Bolts and Studs (7)
(5) 156.
C7.10 Pressure Retaining Components --
(2) 157.
C7.ll Pressure Retaining Components --
NON REGENERATIVE LETDOWN HEAT EXCHANGER 2-1140 158.-
C1.10 Circumferential Shell Weld (10) 2-1140 159.
C1.20 Circumferential Head Weld 1 206 2-1140 160.
C?.30 Tubesheet to Shell Weld (10) 0 6/?2/84
(
PROGRAM-IWC-2500-1 EXAf11 NATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol.
Sur.
Vis.
NON REGENERATIVE LETDOWN HEAT EXCHANGER (7) 2-1140 161.
C2.10 Nozzle in Vessel Welds C2.20 Nozzle in Vessel Welds 162.
C2.21 Nozzle to Shell Welds (7)
(7) 2-1140 163.
C2.22 Nozzle Inside Radius Section (7) 2-1140 2-1140 164.
C3.10 Integrally Welded Attachments --
11 1WS & 2WS 2-1140 165.
C4.10 Bolts and Studs (7)
(5) 166.
C7.10 Pressure Retaining Components --
(2)
- 167, C7.11 Pressure Retaining Components --
O acccataative seat exc"ancta 2-1150 168.
Cl.10 Circumferential Shell Welds 206 2,3,6,7,10 and 11 2-1150 169.
C1.20 Circumferential Head Welds 206 1,4,5,8,9 and 12 170.
C1.30 Tubesheet to Shell Welds (10) 2-1150 (7) 2-1150 171.
C2.10 Nozzle in Vessel Welds C2.20 Nozzle in Vessel Welds 172.
C2.21 Nozzle to Shell Welds (7)
(7) 2-1150 173.
C2.22 Nozzle Inside Radius Section (7) 2-1150 174.
C3.10 Integrally Welded Attachments --
(10) 2-1150 175.
C4.10 Bolts and Studs (10) 2-1150 (5) 176.
C7.10 Pressure Retaining Components --
(2) 177.
C7.11 Pressure Retaining Components --
-- 6/22/84
1 PROGRAM IWC-2500-1 EXAMINATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol. Sur. Vis.
RECIRCULATION SPRAY COOLERS 1A,1B,1C & 1D 178 C1.10 Circumferential Shell Welds (10) 2-1160 i
2-1160 I
179 C1.20 Circumferential Head Welds (10) 2-1160 180 C1.30 Tubesheet to Shell Welds 206 1A-1 and 1A-11 2-1160 11 181 C2.10 Nozzle in Vessel Welds 1A-12 and 1A-13 C2.20 Nozzle in Vessel Welds 182 C2.21 Nozzle to Shell Welds (7) (7) 2-1160 f
183 C2.22 Nozzle Inside Radius Section (7) 2-1160 184 C3.10 Integrally Welded Attactinents --
11 2-1160 1A-1WS thru 1A-10WS t
2-1160 185 C4.10 Bolts and Studs (10) 7 (5) 186 C7.10 Pressure Retaining Components --
(2) 187 C7.11 Pressure Retaining Components --
VOLUME CONTROL TANK 188 C1.10 Circumferential Shell Welds (10) 2-1200 2-1200 4
189 C1.20 Circumferential Head Welds 206 5
1 and 2 P
2-1200 i
190 C1.30 Tubesheet to Shell Welds (10)
(7) 2-1200 i
191 C2.10 Nozzle in Vessel Welds C2.20 Nozzle in Vessel Welds 192 C2.21 Nozzle to Shell Welds (7) 2-1200 2-1200 i
193 C2.22 Nozzle Inside Radius Section (7) 2-1200
[
194 C3.10 Integrally Welded Attachments --
(7)
I 6/22/84 I
r
I PROGRAM IWC-2500-1 EXAMINATION SKETCH V
ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol. Sur. Vis.
VOLlNE CONTROL TANK (cont'd) 195 C4.10 Bolts and Studs (7) 2-1200 (5) 196 C7.10 Pressure Retaining Components --
(2) 197 C7.ll Pressure Retaining Components --
ACCUMULATOR TANKS 1 A,18 AND IC 2-1210 198 C1.10 Circumferential Shell Welds (10) 2-1210 199 C1.20 Circumferential Head Welds 206 1A-1, 1A-2, 1A-3 and 1A-4 2-1210 200 C1.30 Tubesheet to Shell Welds (10) 2-1210 201 C2.10 Nozzle in Vessel Welds C2.20 Nozzle in Vessel Welds O
greater than 1/2 inches C/
nominal thickness 2-1210 202 C2.21 Nozzle to Head Weld 1A-5 206 70 2-1210 203 C2.22 Nozzle Inside Radius Section (7) 2-1210 (7) 204 C3.10 Integrally Welded Attachment 2-1210 205 C4.10 Bolts and Studs (7)
(5) 206 C7.10 Pressure Retaining Components --
(2) 207 C7.11 Pressure Retaining Components --
SEAL WATER INJECTION FILTERS 4A & 4B 2-1300 208 C1.10 Circumferential Shell Weld 206 4A-1 2-1300 209 Cl.20 Circumferential Head Weld 206 4A-2 2-1300 210 Cl.30 Tubesheet to Shell Welds (10) 2-1300 (7) 211 C2.10 Nozzle in Vessel Welds 6/22/84 -
'p PROGRAM IWC-2500-1 EXAMINATION SKETCH V
ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol. Sur. Vis.
SEAL WATER INJECTION FILTERS 4A & 4B (cont'd)
C2.20 No zie in Vessel Welds 212 C2.21 Nozzle to Shell Welds (7) (7) 2-1300 2-1300 213 C2.22 Nozzle Inside Radius Section (7) 2-1300 214 C3.10 Integrally Welded Attachments -- (7) 2-1300
'215 C4.10 Bolts and Studs (7)
(5) 216 C7.10 Pressure Retaining Components (2) 217 C7.11 Pressure Retaining Components REACTOR COOLANT FILTER 2-1310 218 C1.10 Circumferential Shell Welds - (8) 11 1 and 2 2-1310 219 C1.20 Circumferential Head Weld 3 (8) 11 2-1310 220 C1.30 Tubesheet to Shell Welds (10) 2-1310 221 C2.10 Nozzle in Vessel Welds
-- (7)
C2.20 Nozzle in Vessel Welds 2-1310 222 C2.21 Nozzle to Shell Welds (7) (7) 2-1310 223 C2.22 Nozzle Inside Radius Section (7) 2-1310 11 224 C3.10 Integrally Welded Attachment lWS 2-1310 225 C4.10 Bolts and Studs (7)
(5) 226 C7.10 Pressure Retaining Components (2) 227 C7.11 Pressure Retaining Components SEAL WATER RETURN FILTER 2-1320 228 C1.10 Circumferential Shell Welds 206
]c 1 and 2 6/22/84 M.
r t
l PROGRAM IWC-2500-1 EXAMINATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol. Sar. Vis.
l SEAL WATER RETURN FILTER (cont'd) i
(
2-1320 i
229 C1.20 Circumferential Head Weld ~3 206
.. i 2-1320 l
230 C1.30 Tubesheet to Shell Welds (10)
(7)
Z-1320 l
i 231 C2.10 Nozzle in Vessel Welds C2.20 Nozzle in Vessel Welds l
s 2-1320 f
232 C2.21 Nozzle to Shell Welds (7)
(7) l 2-1320 l
i 233 C2.22 Nozzle Inside Radius Section- (7) 2-1320 11 234 C3.10 Integrally Welded Attach-l ments lWS x
c 2-1320 l
235 C4.10 Bolts and Studs (7) i 236 C7.10 Pressure Retaining Component's --
(5) s
(~T i
U 237 C7.11 Pressure Retaining Components'--
-,. (2) 1 l
PIPING
'1 11,70 --
S 2-2710 23B C3.40 Integrally Welded Attachments --
2-2600 239 C4.20 Bolts and Studs 15 C5.10 Piping less than or equal to 1/2 inches nominal wall i
thickness
/70 ' --
2-2100 to 240 C5.11 Circumferential Welds 2-2555
/
2-2100 to 70 241 C5.12 Longitudinal Welds 2-2555 C5.20 Piping greater than 1/2 inches l
nominal Wall Thickness lij 2-2100 to 242 C5.21 Circumferential Welds 206 70 t
2-2555 i
II 2-2100 to l
243 C5.22 Longitudinal Welds 206
/
70 2-2555 C5.30 Pipe Branch Connections i
O f
1 r
i 6/22/84 l
l l
t t
PROGRAM IWC-2500-1 EXAMINATION SKETCH
.b'3)
ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol. Sur. Vis.
PIPING (cont'd)
I 11
/
244 C5.31 Circumferential Welds 2-2100 to 70 2-2555 l
/
2-2100 to f
245 C5.32 Longitudinal Welds 70 2-2553 (5) 246 C7.20 Pressure Retaining Components --
{
(2) 247 C7.21 Pressure Retaining Components --
i RESIDUAL HEAT REMOVAL PUMPS 1A & 18
,Ls 2-3100 248 C3.70 Integrally Welded Attachments --
11 1A-1WS, IA-2WS & 1A-3WS 2-3100 249 C4.30 Bolts and Studs (7) i 2-3100 (10)
> ?i',
250 C6.10 Pump Casing Welds p
[
(5)
A-251 C7.30 Pressure Retaining Components --
.s (2) l 252 C7.31 Pressure Retaining Components --
CHARGING PlNPS 1A, 1B & 1C l
2-3110 Y
253 C3.70 Integrally Welded Attactinents --
11 1A-1WS, 1A-2WS, IA-3WS & 1A-4WS yt, 2-3110 254 C4.30' Bolts and Studs (7) 2-3110 (10) 255 C6.10 Pump Casing Welds (5)
V 256 C7.30 Pressure Retaining Components --
(2) 257 C7.31 Pressure Retaining Components --
REACTOR COOLANT PUMPS 1, 2 t, 3 2-3120 258 C3.70 Integrally Welded Attachments --
(10) 2-3120 259 C4.30 Bolts and Studs (7) 2-3120 l
(10) 260 C6.10 Pump Casing Welds x,
[
, 6/22/84 i
c-
~
F f)
PROGRAM IWC-2500-1 EXAMINATION SKETCH
[V ITEM REFERENCE AREA TO BE EXAMINE 9 DPOCEDURE REFERENCE Vol. Sur. Vis.
SEACTOR COOLANT PlEPS 1, 2 & 3 (con't'd)
(5)'
261 C7.30 Pressure Retaining Components ;
.(2) 262 C7.31 Pressure Retaining Components --
LOW HEAD SAFETY INJECTION PUMPS 1A I. 1B 263 C3.70 Integrally Welded Attachments --
(10) ' ' - '
2-3130 l
264 C4.30 Bolts and Studs (7),--!
2-3130 (10)-
2-3130 265 C6.10 Pump Casing Welds
( 5 )..
266 C7.30 Pressure Retaining Components --
(2) 267 C7.31 Pressure Retaining Components --
RECIRCULATION SPRAY PUMPS 1 A,1B,1C & ID 268 C3.70 Integrally Welded Attachments --
11 2-3140 269 C4.30 Bolts and Studs 15 2-3140 270 C6.10 Pump Casing Welds 11 2-3140 I
l (5) 271 C7.30 Pressure Retaining Components --
l (2) 272 C7.31 Pressure Retaining Components --
VALVES 273 C3.100 Integrally Welded Attachments --
11 2-2710 2-4100 274 C4.40 Boltu and Studs 15 (10) 275 C6.20 Valve Body Welds (5)
~276 C7.40 Pressure Retaining Components --
277 C7.41 Pressure Retaining Components --
(2) b 6/22/84
A f%
't
)
PROGRAM IWF-2500-2 EXAMINATION SKETCH ITEM REFERENCE AREA TO BE EXAMINED PROCEDURE REFERENCE Vol. Sur. Vis.
278 F-1 Examine 100% of supports 8
General by VT-3 as applicable 279 F-2 Examine 100% of supports 8
General by VT-3 as applicable 8
General 280 F-3 Examine 100% of supports by VT-3 as applicable GENERAL NOTES (1)
Examine 100% during preservice inspection in conjunction with item Bl.10.
(2) Examined by other than Westinghouse Inspection Services during system hydrostatic tests.
(3) Not apolicable to PSI.
Examined after refueling outages only.
(4) Examined by other than Westinghouse Inspection Services.
(5) Examined by other than Westinghouse Inspection Services in conjunction with syste.n hydrostatic test.
(')
(6) Examined by other than Westinghouse Inspection Services - Shop examination data to be used for baseline information.
(7) Component items do not meet code requirement size for examination in this category.
(8) Ultrasonic examination not feasible due to material thickness.
Surface examination done as a substitute.
(9) Relief requested:
no method of manual ultrasonic examination feasible at this time. Visual examination done as substitute where access is available.
(10) There are no items in this category for this component.
(11) Volumetric examination performed by other than Westinghouse Inspection Services - Shop examination data to be used for baseline information.
(12) Reactor Vessel Studs are removed for examination, as per item 25.
EXAMINATION PROCEDURES:
Asterisks (*) noted on the left hand margin of these Class 1 & 2 procedures identify deviations from the ASME Code and use of an alternative method. The deviations are explained in another document.
- (,_)
l
~'%w 6/22/84
l PROCE DU AE NUMBE R Nuclear iNseecTiON services t~j Wj Services Integration DMW-ISI-154, Rev. 0 en.
NONDESTRUCTl /E EXAMINATION PROCEDURE DiViSi0n l
TITLE 1
PRESERVICE AND INSERVICE INSPECTION OF REACTOR VESSELS l
i O
i i
r i
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PREPARED BY:
D. Kurek, Level 111
)
T
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i APPROVED D. C. Adamonis, Manager Inspection Service f
.N t
l t
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INDEX 1.0 PURPOSE 2.0 SCOPE I
3.0 EQUIPMENT i
l 4.0 PERSONNEL REQUIREMENTS l
l 5.0 INSTRUMENT PERFORMANCE CHECKS 6.0 SYSTEM CALIBRATION 7.0 EXAMINATION REQUIREMENTS O
8 o 1NTEaeaEta11oN ANo 1NvESTicATicN 9.0 RECORDING REQUIREMENTS i
10.0 EXAMINATION RECORDS l
I i
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PRESERVICE AND INSERVICE INSPECTION OF REACTOR VESSEL.S i,
1.0 PURPOSE 4
1.1 This document describes tne equipment, calibration sequence, examin-ation techniques, and recording requirements for preservice and j
inservice inspection of the Beaver Valley Unit 11 reactor vessel l
with the remotely operated inspection tool.
All operations described herein are intended to satisfy volumetric examination requirements of the 1980 Edition of Section XI of the ASME Boiler I
and Pressure Vessel Code including Addenda through Winter 1980 and the Westinghouse position on USHRC Regulatory Guide 1.150. The Beaver Valley Unit 2 Examination Program Plant (EPP) is considered part of this procedure and should be used as applicable.
2.0 SCOPE f3 y/
l 2.1 This document provides general requirements for straight and angle beam immersion ultrasonic examinations of pressure retaining carbon l
and low alloy steel welds, nozzle safe end welds, heat affected zones, specified base material, and weld repairs to base material l
which exceed 10% of the nominal wall thickness in the reactor vessel f
beltline regions.
I I
2.2 Specific calibration and examination requirements, i.e., areas selected for examination, extent of examination, search unit sizes, angles, calibration standards, and water path dista:1ces, are defined in the plant specific Examination Program Plan.
l 3.0 EQUIPMENT i
3.1 Examinations shall be performed using pulse-echo and/or transmit-receive techniques with immersion water path coupling using the l
(,)
equipment listed below.
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3.1.1 Sonic Multichannel Time - Anplitude Ultrasonic System, consisting of the following modules and interconnects:
i Pulser / Preamps Mark VI Mainframe /CRT l
Mark VI Receiver Mark VI Interface System controller Hardcopy Controller l
Gate Monitor Two Tektronix 613 Storage Scopes l
Data Display Tektronix 4613 Hardcopy Printer Power Supply Module Serial Data Link RG-174 Cable, 23 f t.
Four Tektronix 2213 Auxiliary Displays 3.1. 2 Westinghouse Compcter System Model 2500 l
l 3.1.3 Westinghouse MK-1 Electronic Block Simulator (EBS) l l
I
\\
3.1.4 Ultrasonic Transducers 2.25 MHz,1.50 inches diameter I
2.25 MHz, 0.75 inches diameter 1.0 MHz,1.50 inches diameter l
1.0 MHz, 0.75 inches diameter 5.0 MHz, 0.50 inches x 1.00 inches rectangular 1
l 3.1. 5 Transducer array plates and transducer mounting assemblies j
3.1.6 Calibration tank and manipulator i
I 3.1.7 Calibration block 3.1.8 Mechanical Transfer Standard (FITS) l 1
3.1.9 Spherical "Home" Target O
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3.2 Other transducers, calibration standards, and/or equipment may be i
used for special applications or where metallurgical characteristics or geometry preclude effective use of the equipment described above.
These parameters shall be defined in the Examination Program Plan.
I 4.0 PERSONNEL REQUIREMENTS f
4.1 Ultrasonic test operators performing activities per this procedure shall be qualified and certified Level II or Level III per W PA 10.1 j
or equivalent procedure based on SNT-TC-1 A, as supplemented by the requirements of Section XI.
Individuals qualified and certified I
Level I or Level I Trainees per W PA 10.1 or equivalent procedure as described above may perform these activities under direct supervision of a Level II or Level III. All recordable indications shall be evaluated by a Level II or Level III individual.
l O
5.0 INSTRUMENT PERFORMANCE CHECKS I
5.1 Instrument screen height linearity and amplitude control linearity i
shall be verified prior to the performance of any system calibra-tions and at the beginning and end of the examination period or every three months, whichever is less. The same EBS signal l
response (s) shall be used for the initial determination and subsequent field checks.
I 5.2 The ultrasonic instrument shall be verified as havino a linear vertical presentation within + 5% of the full screen height for at least 80% of the calibrated screen height in accordance with the following steps.
5.2.1 Utilizing the EBS and any given channel of the Sonic System obtain two EBS pulses on the CRT.
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5.2.2 Adjust the EBS controls and the receiver gain control to set the first indication to 80% full screen height (FSH) i and the second indication at 40% FSH.
t 5.2.3 Without changing the EBS controls, adjust the receiver gain to sequentially se ' +.he larger indication from 100%
l to 10% FSH in 10% increments.
Record the smaller indication amplitude at each setting. Estimate the readings to the n~earest 1% FSH.
5.2.4 The reading must be 50% of the larger amplitude, within
+ 5% FSP.
l i
5.2.5 Record all data and instrument settings on the appropriate data sheet.
l n
V 5.3 The accuracy of the amplitude control of the ultrasonic system shall be verified as being within + 20% of the nominal amplitude ratio j
1 over its useful range in accordance with the following steps.
l i
5.3.1 Utilizing the EBS and any given channel of the Sonic System obtain an EBS pulse on the CRT.
I 5.3.2 Mjust the receiver gain to set the indication to 80%
l FSH. Record the receiver gain setting.
i 5.3.3 Decrease the receiver gain by 6dB and record the signal amplitude.
5.3.4 Decrease the receiver gain again by 6dB and record the j
signal amplitude. Decrease the receiver gain by an l
additional 6dB and record the signal amplitude.
l I
5.3.5 Mjust the receiver gain to set the indication to 40%
FSH. Record the receiver gtin setting.
l l
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i 5.3.6 Increase the receiver gain by 6dB and record the sig.al ampli tude.
l 5.3.7 Adjust the receiver gain to set the indication to 20%
t FSH. Record the receiver gain setting.
5.3.8 Increase the receiver gain by 12dB and record the signal ampl i tude.
5.3.9 Adjust the receiver gain to set the indication to 10%
FSH. Record the receiver gain setting.
5.3.10 Increase the receiver gain by 18dB and record the signal ampli tude.
5.3.11 Recorded readings must be within the following limits:
Indication Set at dB Control Indication Limits
% of FSH Change
% FSH 80%
-6dB 32 to 48%
80%
-12dB 16 to 24%
80%
-18dB 8 to 12%
l 40%
+6dB 64 to 96%
20%
+12 dB 64 to 96%
10%
+18dB 64 to 96%
5.3.12 Record all data and instrument settings on the appropriate i
data sheet.
5.4 Verification of performance of instrument performance checks shall be documented. Documentation shall include the date, time, and the f
I initials of the operator.
i 5.5 A photographic record of.the RF pulse waveform shall be obtained for O-each transducer, before and after each vessel examination per paragraph 6.13.
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(G 6.0 SYSTEM CALIBRATION 6.1 Calibration Requirements - General System calibration shall be performed at the Vastinghouse Waltz Mill
{
I Si te.
6 i
6.1.1 Calibratico shall include the complete ultrasonic system 1
using responses from reflectors in the basic calibration block (s). The ultrasonic system is defined as the ultrasonic instrument, cables, transducer, couplant, and any other apparatus, instrument or circuit between the instrument and the calibration block surface.
6.1.2 Basic calibration blocks used for calibration of the ultrasonic system shall be defined by the plant specific Examination Program Plan and shall meet the following requirements.
I i
6.1.2.1 The material from which the block (s) are l
fabricated shall be from one of the following:
l t
(a) a nozzle. copout from the reactor vessel (b) a prc.ongation from the reactor vessel
~
(c) material of the same general material spec-ification, product form, and heat treatment l
as one of the materials being joined.
6.1. 2. 2 Where the component material is clad, the block (s) shall be clad to the component clad nominal thickness. Deposition of the cladding may be by an automatic or manual technique so i
long as the method represents, to the extent h
practical, the method used on the reactor vessel.
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6.1.2.3 The calibration block shall receive at least the minimum tempering temperature treatment required by the material specification and a post weld heat treatment of at least two hours.
6.1. 3 The block (s) shall be placed in the calibration tank and carefully leveled and aligned.
The zero degree index of the manipulator shall be defined.
6.1.4 Each calibration shall be performed from the calibration i
block surface, clad or unclad, corresponding to the surface of the component from which the examination will be perforced. The calibration block, surface, reference reflectors, and scan directions used during calibration
{
sha*1 be defined on the calibration data sheets, If, for i
l any reason, it is necessary to change any of the calibra-l O
tion parameters from those recommended in the Examination I
Program Plan, the changes shall be documented and reasons for those changes shall be transmitted to the NSID Inspection Services coordinator.
6.1. 5 During calibration the search unit centerline shall be at I
least 1-1/2 inches from the nearest side of the basic calibration block.
6.1.6 The water temperature for calibration shall be within 25*F of the water temperature during scanning.
Devices for I
this measurement are not considered MTE equipment.
l 6.1. 7 Transducers shall be calibrated in fixtures which provide i
the angle of incidence specified in the examination Program Plan. Upon completion of the calibration sequence
{
the transducer / fixture assembly shall be mounted on the l
array plate at the specified location. The orientation of j
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the transducer with respect to the fixture shall not be changed. Bubbles shall not be present on the transducer face or the calibration block entry surface during the l
i calibration sequence.
6.1.8 A calibration data sheet packet shall be completed for i
each transducer / inspection channel combination used to examine each volume required by the plant specific Examination Program Plan.
All data will be fully recorded such that the operating parameters can be verified in the field. Calibration and examination data sheets are attached as Figures 1 through 4.
6.1.9 Measurements of beam spread shall be made for each transducer used during the inspection program. These measurements shall be performed per paragraph 6.11.
These
_)
data will be included in the calibration data described in i
paragraph 6.1.8.
l 6.1.10 The artificial waterpath selector shall be set at the i
transit time ecual to the waterpath of the transducer (inspection channel 0) used to synchronize the interface l
gating function for a given calibration package.
6.2 Calibration for Straight Beam Examination of Vertical and l
Circumferential Welds System calibration for each straight beam inspection channel /
transducer. combination used for examination of vertical and circum-ferential welds, including safe end welds and the flange-to-upper f
shell weld from the shell side, shall be performed as described l
I below.
OG l
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6.2.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank, i
6.2.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and l
i adjust for the required waterpath, 6.2.3 Adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.
I 6.2.3.1 Adjust the instrument range to the maximum l
achievable sweep range where the initial pulse
{
and entry surface reflection are displayed on l
the CRT screen. Record the transit time to the O
entry surface reflection.
V 6.2.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in l
l!
units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from I
the digital display. All transit time measurements can be made in this manner.
6.2.3.3 Determine the sound velocity and measure the water temperature.
Record these values.
l 1
y, Round Trip Distance
{
Travel Time
{
l r
A i
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i 6.2.4 Adjust the instrtment delay such that the lower left corner of the en:ry surface reflection starts at the 0 gradicule on the CRT.
j 6.2.4.1 Adjust the instrument range such that metal trasel between the entry surface reflection and e
bicck back surface reflection occupies 60% to i
90% of the full sweep length.
6.2.4.2 Record the transit time between the entry sur-face reflection and the back surface reflection.
i i
i 6.2.4.3 Calculate the sound velocity in the calibration block and record this value.
l I
6.2.4.4 Adjust the selected gate controls to include all metal travel between the entry surface reflection and the back surface reflection.
6.2.5 Sat the trace and gate baselin.!s to zero percent of scale.
l i
6.2.6 position the trarsducer to obtain the maximum response I
from the side drilled hole which exhibits the highest am-i I
p11tude. Adjust the preamplifier gain control to set the indication amplitude to 40% + IdB of full screen height.
Mark the peak of the indication on the screen. Record f,
instrument settings, indication amplitude, and the transit f'
time from the entry surface reflection to the indication.
l 6.2.7 Without changing instrument settings move the transducer j
to obtain the maximum responses from the remaining l
calibration holes. Mark the peak of the indications on the screen. Record the indication amplitudes and transit i
times from the water / steel interface to the indications.
i s
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6.2.8 Draw a line through the maximum response points on the CRT l
screen.
The curve may be extrapolated at either end for a distance of one-quarter the thickness of the calibration block.
This line represents the basic calibration distance amplitude curve (DAC).
6.2.9 Mjust the EBS pulse train to follow the DAC over the i
entire gate length.
Record the EBS control settings.
6.2.10 The electronic DAC module function shall then be initiated.
6.2.10.1 Adjust the electronic DAC controls so all EBS l
pulses are nominally 40% FSH.
l i
6.2.10.2 Adjust the monitor gate threshold to the position where a 16% FSH alarm level is realized and set for positive trigger.
{
l I
6.2.10.3 Disable the EBS, scan the block, and observe the i
I responses from each applicable calibration f
re flector.
The amplitude of each should be at 40% FSH.+ IdB.
If not, review steps 6.2.1 through 6.2.10.3.
i 6.2.10.4 Decrease the receiver gain by 6d3.
Switch the system to the cycle mode and scan the transducer assembly over, the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak response from each hole is detected.
If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition
.O r te. i rm ievei. etc.) "ich m 1 rea#4re adjustment and make corrections, if necessary.
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/S 6.2.10.5 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration data sheets.
6.2.11 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS j
response amplitudes. Position the transducer to obtain l
the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
I Reflectors selected for this step shall provide transit f
l times representative of those for the primary reflectors in the basic calibration block where practical.
6.3 Calibration for Angle Beam Examination of Vertical and i
Circumferential Vessel Welds
.I I
System calibration for each angle beam inspection channel / transducer l
combination used for examination of vertical and circumferential vessel welds, including the flange-to-upper shell weld from the shell side, shall be performed as described below.
i 6.3.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.
6.3.2 Position the transducer to direct the sound beam toward l
the appropriate surface of the calibration block and
,l adjust for the required waterpath.
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L 6.3.3 Position the transducer to obtain a maximum response from j
the square notch on the opposite surface or the block l
corner and adjust the instrument delay such that the lower l
left corner of the initial pulse starts at the 0 gradicule on the CRT.
I 6.3.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen.
Record the transit time to the entry surface reflection.
l 6.3.3.2 Since the gate position controls of the l
ultrasonic system are calibrated directly in j
units of time, the gate can be moved to coincide with the entry surface reflection and travel O
ti e 4# icroseco#as c 8e re e airectl> <re-the digital display.
All transit time j
t measurements can be made in this manner, j
i l
c 6.3.3.3 Determine the sound velocity and measure the j
water temperature.
Record these values.
l V = Round Trip Distance Travel Time t
i 6.3.4 Mjust the instrument delay such that the lower lef t corner of the entry surface reflection starts at the 0 gradicule on the CRT.
j i
6.3.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the notch response or the block corner response f
occupies 50% to 80% of the full sweep length.
1 l
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6.3.4.2 Record the transit time between the entry l
surface reflection and the notch response or l
block corner response, j
6.3.4.3 Calculate the sound velocity in the calibration I
i block and record this value.
i I
6.3.4.4 Position the transducer to obtain the maximum response from the 3/4T hole after the beam has bounced from the opposite surface (5/8 node response) and adjust the selected gate controls j
to include all metal travel between the entry I
surface reflection and this indication.
1 6.3.5 Set the trace and gate baselines to zero percent of scale.
6.3.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest am-plitude.
Adjust the preamplifier gain control to set the f
indication amplitude to 80% + IdB of full screen height.
Mark the peak of the indication on the screen. Record j
instrument settings, indication amplitude, and the transit l
l time from the entry surface reflection to the indication.
6.3.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration l
holes including the 5/8 node response from the 3/4T hole.
l Mark the peaks of the indications on the screen. Record l
indication amplitudes and transit times from the l
water / steel interface to the indications.
If the 5/8 node l
respoe.se from the 3/4T hole is not readily discernable, the DAC curve amplitude point shall be determined by calculating the dB dif ference between the 1/2T and 3/4T l
s
(
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reflector amplitudes, decreasing the 3/4 T reflector l
amplitude by two times that difference, and marking the resulting amplitude at the point on the sweep that represents the transit time to the 5/8 node position.
I, l
6.3.8 Draw a line through the maximum response points on the CRT i
screen. The curve may be extrapolated at either end for a distance of one-quarter the thickness of the calibration block.
This line represents the basic calibration distance amplitude curve (DAC).
i 5.3.9 Without changing the instrument settings position the j
transducer to obtain a maximum response from the square I
notch on the opposite surface, if applicable. Record the indication amplitude and transit time from the water / steel interface to the indication.
O) 6.3.10 Adjust the EBS pulse train to follow the DAC over the entire gate length. Record the EBS control settings.
6 6.3.11 The electronic DAC module function shall then be initiated.
6.3.11.1 Adjust the electronic DAC controls so all EBS pulses at transit times from the entry surface reflection to and including the response from l
the 1/4T hole are nominally 80% FSH and those at l
transit times in excess of the 1/4T hole to the end of the gate are nominally 40% FSH.
6.3.11.2 Adjust the monitor gate threshold to the position where a 16% FSH alarm level is realized and set for positive trigger.
O l
[
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V 6.3.11.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflec tor.
The amplitude of the 1/4T hole should be at 80% FSH + IdB and the amplitudes of the 1/2T, 3/4T, and 5/8 node response from the l
3/4T hole should be at 40% FSH + ldB.
If not, l
review steps 6.3.1 through 6.3.11.3.
6.3.11.4 Decrease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak amplitude from each hole is detected.
Decrease the receiver gain by an additional 8dB and once again scan over the block at or higher than the specified examination speed. The alum should actuate when the peak amplitude fror the 1/4T hole is detected.
If the alarm ir not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g.,
l alarm count, repetition rate, alarm level, etc.)
which may require adjustment and make j
corrections, i f necessary.
l 6.3.11.5 Increase the receiver gain by 14dB and record all pertinent calibra+,f on data on the l
calibration data sheets.
I i
I l
l
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I (m usw
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b 6.3.12 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS l
response amplitudes.
Position the transducer to obtain i
I the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit t
times representative of those for the primary reflectors in the basic calibration block where practical.
f i
6.4 Calibration for Examination of the Flange-to-Upper Shell Weld From the Flange Seal Surface
/
System calibration for each inspection channel / transducer combination used for examination of the flange-to-upper shell weld l
from the flange seal surface shall be performed as described below.
6.4.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank.
6.4.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.
6.4.3 Mjust the instrument delay such that the lower lef t corner of the initial pulse starts at the 0 gradicule on the CRT.
i I
lO l
i i
l
_ _ _ _ _ _ _ _j
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'6.4.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse l
and entry surface reflection are displayed on e
i the CRT screen. Record the transit time to the entry surface reflection.
1 6.4.3.2 Since the gate position controls of the i
ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel l
time in microseconds can be read airectly from j
I the digital display. All transit time measurements can be made in this manner.
6.4.3.3 Determine the sound velocity and measure the water temperature. Record these values.
l y, Round Trip Distance Travel Time 6.4.4 Adjust the instrument delay such that the lower left corner of the entry surface reflection starts at the 0 gradicule on the CRT.
6.4.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the reflection from the reference hole at the longest test metal distance occupies 60% to 90%
l of the full sweep length.
i 6.4.4.2 Record the transit time between the entry j
surface reflection and the reflection from the I
reference hole.
l i
Rf viSID f ' t ( Cilk E 19 of 78 out DATE June 13, 1984 ract l
. l43 N%eD 1014 H t V
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l l
6.4.4.3 Calculate the sound velocity in the calibration i
block and record this value.
l 6.4.4.4 Mjust the selected gate controls to include all metal travel including the weld and specified adjacent base material on the shell and flange sides of the weld.
6.4.5 Set the trace and gate baselines to zero percent of scale.
6.4.6 Position the transducer to obtain the maximum response l
from the side drilled hole which exhibits the highest am-plitude. Adjust the preamplifier gain control to set the indication amplitude to 80% + IdB of full screen height.
l I
Mark the peak of the indication on the screen.
Record instrument settings, indication amplitude, and the transit l
time from the entry surface reflection to the indication.
l 6.4.7 Without changing instrument settings move the transducer to obtain the maximum responses from the remaining l
calibration holes. Mark the peak of the indications on I
the screen.
Record the indication amplitudes and transit times from the water / steel interface to the indications.
1 i
6.4.8 Draw a line through the maximum response points on the CRT The curve may be extrapolated at either end for a screen.
distance of one-quarter the thickness of the calibration block. This line represents the basic calibration distance amplitude curve (DAC).
6.4.9 Mjust the EBS pulse train to follow the DAC over the entire gate length. Record the EBS control settings.
t l
i i
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June 13.1984 rac.t 20 of 78
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i v
The electronic DAC module function shall then be initiated.
l 6.4.10 6.4.10.1 Adjust the electronic DAC controls so all EBS
'l pulses are nominally 80% FSH.
6.4.10.2 Adjust the monitor gate threshold to the l
position where a 16% FSH alarm level is realized and set for positive trigger.
6.4.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector.
The amplitude of each should be at I
80% FSH + IdB.
If not, review steps 6.4.1 through 6.4.10.3.
6.4.10.4 Decrease the receiver gain by 14dB. Switch the O
system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.
i The gate alarm shall actuate when the peak response from each hole is detected.
If the alarm is not observed for one or more of the holes, investigate to identify the test system l
parameter (s) (e.g., alarm count, repetition j
rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.4.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.
I i
m usco tuccint 21 of 78 oarc i
o^1t June 13,1984 c c.c N%601014 Hi V. 214 3
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6.4.11 Move DEC Delay 1 to a position past the end of the gated
[
sweep, i.e. where the DEC will not influence the MTS response amplitudes. Position the transducer to obtain
{
the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep j
I length. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
l i
Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
l 6.5 Calibration for Examination of Nozzle-to-Shell Welds from the Nozzle L
Bore l
1
)
System calibration for each inspection channel / transducer j
combination used for examination of nozzle-to-shell welds from the nozzle bore shall be performed as described below.
i i
6.5.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the l
manipulator in the calibration tank.
I i
6.5.2 Position the transducer to direct the sound beam toward i
the appropriate surface of the calibration block and adjust for the required waterpath.
l 6.5.3 Adjust the instrument delay such that the lower lef t l
i corner of the initial pulse starts at the 0 gradicule on l
[
the CRT.
i l
I i
of este i
Ef f ECtWE 0
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.8B)
NM[a told Hi V
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-f3 a
6.5.3.1 Adjust the instrument range to the maximum l
achievable sweep range where the initial pulse and entry surface reflection are displayed on i
b the CRT screen. Record the transit time to the entry surface reflection.
i I
6.5.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in I
l units of time, the gate can be moved to coincide with the entry surface reflection and travel r
time in microseconds can be read directly from j
the digital display. All transit time l
I measurements can be made in this manner.
i I
6.5.3.3 Determine the sound velocity and measure the water temperature. Record these values.
O y
Round Trip Distance Travel Time i
6.5.4 Adjust the instrument delay such that the lower lef t corner of the entry surface reflection starts at the 0 gradicule on the CRT.
6.5.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the reflection from the reference hole at the I
longest test metal distance occupies 60% to 90%
i of the full sweep length.
6.5.4.2 Record the transit time between the entry surface reflection and the reflection from the reference hole.
O I
l nf USED EMECME 23 of 78 cart 0"5 June 13,1984 nce NMD 1014 Mt V 21e)
h NSID 1778W:42A/061384 DMW-ISI-154 Rev. 0 7,
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6.5.4.3 Calculate the sound velocity in the calibration block and record this value.
6.5.4.4 Mjust the selected gate controls to include all I
metal travel which will include the entire nozzle, the weld, and specified adjacent base j
material on the shell side of the weld. Consul t the Examination Program Plan to verify that this gate length will monitor the required examination volume.
I 6.5.5 Set the trace and gate baselines to zero percent of scale.
l' l
6.5.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest ampli tude.
Mjust the preamplifier gain control to set the indication amplitude to 80". (+ IdB) of full screen height. Mark the peak of the indication on the screen.
{
Record instrument settings, indication amplitude, and the i
transit time from the entry surface reflectn to the indication.
6.5.7 Without changing instrument settings move the transducer I
to obtain the maximum responses from the remaining calibration holes. Mark the peak of the indications on j
the screen.
Record the indication amplitudes and transit times from the water / steel interface to the indications.
i 6.5.8 Draw a line through the maximum response points on the CRT
{
screen. The curve may be extrapolated at either end for a l
distance of one-quarter the thickness of the calibration l
block. This line represents the basic calibration j
distance amplitude curve (DAC).
l O
24 of 78 ca't catt June 13.1984 ca fWO 1014 Hi V.IaJ
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I V
6.5.9 Adjust the EBS pulse train to follow the DAC over the entire gate length. Record the EBS control settings.
6.5.10 The electronic DAC module function shall then be initiated.
6.5.10.1 Mjust the electronic DAC controls so all EBS l
pulses are nominally 80% FSH.
6.5.10.2 Mjust the monitor gate threshold to the position where a 16% FSH alarm level is realized and set for positive trigger.
6.5.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector.
The amplitude of each should be at 80% FSH + idB.
If not, review steps 6.5.1 through 6.5.10.3.
6.5.10.4 Decrease the receiver gain by 14dB.
Switch the system to the cycle mode and scan the transducer I
assently over the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak j
response from each hole is detected.
If the alarm is not observed for one or more of the l
holes, investigate to identify the test system
[
parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.)' which may require adjustment and make corrections, if necessary.
[
i l
6.5.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.
i i
ni ust o j
t ut cint 25 of 78 out DAtt June 13. 1984 racr NSID 1014 H L V 2383
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h NSID 1778W:42A/061384 DMW-151-154 Rev. O j
p's-l 6.5.11 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS response amplitudes. Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length.
Record the reflector identificati)n, indication
{
amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
l 6.6 Calibration for Examination of Nozzle Radii and Protrusions System calibration for each angle beam inspection channel / transducer I
[
combination used for nozzle radius and protrusion examination shall be performed as described below.
6.6.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the manipulator in the calibration tank, i
i 6.6.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and l
adjust for the required waterpath, i
6.6.3 Poshion the transducer to obtain a maximum response from the side drilled hole at the lor. gest test metal distance l
and adjust the instrument delay such that the lower lef t j
corner of the initial pulse starts at the 0 gradicule on the CRT.
i O
l Hi nt t)
E F F E C t W.
_j o^tt June 13.1984 r a c.t 26 Of 78 o^tt WiiD 1014 HI V 218.l
h NSID 1778W:42A/061384 DMW-ISI-154 Rev. O v
6.6.3.1 Adjust the instrument range to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the I
entry surface reflection.
i 6.6.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel t
time in microseconds can be read directly from the digital display. All transit time measurements can be made in this manner.
6.6.3.3 Determine the sound velocity and measure the water temperature.
Record these values.
/N O
y Round Trip Distance Travel Time
- 6. 6,.
Adjust the instrument delay such that the lower lef t corner of the entry surface reflection starts at the 0 i
i gradicule on the CRT.
l 6.6.4.1 Adjust the instrument range such that metal l
travel between the entry surface reflection and r
the response from the reference hole at the l
longest test metal distance occupies 60% to 90%
j t
of the full sweep length.
6.6.4.2 Record the transit time between the entry I
surface reflection and the side drilled hole lI response.
Og Rf psf D ElIEClivt o^'t June 13. 1984 rac.r 27 of 78 3"
. 183 N%ID 1014 H f V
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6.6.4.3 Calculate the sound velocity in the calibration block and record this value.
6.6.4.4 Adjust the selected gate controls to include all metal travel between the entry surface reflec-tion and the response from the specified side j
drilled hole at the longest test metal df stance.
l 6.6.5 Set the trace and gate baselines to zero percent of scale.
6.6.6 Position the transducer to obtain the maximum response l
from the drilled hole wh'ch exhibits the highest ampli-tude. Adjust the preamplifier gain control to set the indication amplitude to 80% + IdB of full screen height.
}
Mark the peak of the indication on the screen. Record I
instrument settings, indication amplitude, and the transit time from the entry surface reflection to the indication.
6.6.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration hol e.
Mark the peak of this indication on the screen.
Record the indication amplitude and transit time from the water / steel interface to the indication.
l l
6.6.8 Draw a line through the maximum response points on the CRT
)
screen.
The curve may be extended at either end for a distance equivalent to one-quarter the depth of the i
deepest hole. This line represents the basic calibration distance amplitude curve (DAC).
i i
6.6.9 Adjust the EBS pulse train to follow the DAC over the l
entire gate length.
Record the EBS control settugs.
O Ri u5fr f f FE CTWE 28 of 78 o^tt ptE June 13, 1984 ract
h NSID i
1778W:42A/061384 DMW-ISI-154 Rev. O j
l
)
6.6.10 The electronic DAC module function shall then be initiated, j
6.6.10.1 Adjust the electronic DAC controls so all EBS pulses are rominally 80% FSH.
I l
6.6.10.2 Adjust the monitor gate threshold to the i
position where a 16% alarm level is realized FSH and set for positive trigger.
6.6.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration reflector. The amplitude of each should be 80%
l FSH + IdB.
If not, review steps 6.6.1 through I
6.6.10.3.
6.6.10.4 Decrease the receiver gain by 14dB.
Switch the
[v]
system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.
[
l The gate alarm shall actuate when the peak response from each hole is detected.
If the I
alarm is not observed for one or more of the holes, investigate to identify the test system i
parameter (s) (e.g., alarm count, repetition f
rate, alarm level, etc. ) which may require adjustment and make corrections, if necessary, t
6.6.10.5 Increase the receiver gain by 14dB and record all pertinent calibration data on the calibration data sheets.
i i
O(s i
l RI est t$
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June 13.1984 r ac.r 29 of 78 o^u
._ _a PeMD 1014 64 L v. ?-l 4 3
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NSID 1778W:42A/061384 DMW-ISI-154 Rev. 0 (G
I 6.6.11 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS response amplitudes. Position the transducer to obtain the peak responses from at least three cylindrical f
reflectors in the MTS which fall within the gated sweep i
length.
Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit i
times representative of those for the primary reflectors I
in the basic calibration block where practical.
I 6.7 Calibration for Angle Bean Examination of Nozzle-to-Safe End Welds System calibration for each angle beam inspection channel / transducer
)
combination used for safe end inspection shall be performed as l
described below. When the calibration block is a mockup of the bimetallic weld, calibration shall be from the side of the weld, carbon steel or stainless steel, corresponding to the side of the I
weld from which the examination will be performed.
6.7.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly to the manipulator in the calibration tank.
6.7.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.
6.7.3 Position the transoucer to obtain a maximum response from the side drilled hole at the longest test retal distance and adjust the instrument delay such that the lower left corner of the initial pulse starts at the 0 gradicule on the CRT.
-.4 Af USL P (UECNE 30 of 78 ont 0"E June 13,1984 r ac.t N%ID 1014 64 L v 2 4 B 3
W NSID 1778W:42A/061384 DMW-ISI-154 Rev. 0 Ov 6.7.3.1 Adjust the instrument range to the maximum i
achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to the entry surface reflection.
6.7.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the entry surface reflection and travel time in microseconds can be read directly from the digital display. All transit time i
i mea:ur:ments can be made ir this manner.
6.7.3.3 Determine the sound velocity and measure the water temperature.
Record these values.
O y, Round Trip Distance Travel Time 6.7.4 Mjust the instrument delay such that the lower lef t corner of the entry surface reflection starts at the 0 j
gradicule on the CRT.
i 6.7.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the side drilled hole at the longest test distance occupies 50% to 70% of the full sweep length, i
1 6.7.4.2 Record the transit time between the entry surface reflection and the response from the drilled hole at the longest test distance.
n
'b
\\.
i l
l E8FECiM At USED o^"
June 13,1984 nic.i 31 of 78 o^u N9t> 1014 641 v ? I a.)
h NSID 1778W:42A/061384 DMW-ISI-154 Rev. 0 b
l 6.7.4.3 Calculate the sound velocity in the calibration block and record this value.
6.7.4.4 Adjust the selected gate controls to include all metal travel from the entry surface reflection to the equivalent of 1/4T past the 3/4T hole as a minimum.
6.7.5 Set the trace and gate baselines to zero percent of scale.
6.7.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest am-plitude.
Adjust the preamplifier gain control to set the indication amplitude to 40% + ldB of full screen height.
Mark the peak of the indication on the screen. Record instrument settings, indication amplitude, and the transit l
)
time from the entry surface reflection to the indication.
l 6.7.7 Without changing instrument settings move the transducer to obtain the maximum responses from the other calibration l
holes. Mark the peaks of these indications on the I
screen.
Record the indication amplitudes and transit time j
from the water / steel interface to the indications.
i i
6.7.8 Draw a line through the maximum response points on the CRT screen.
The curve may be extrapolated at either end for a distance of one-quarter the thickness of the calibration I
block.
This line represents the basic calibration l
distance amplitude curve (DAC).
l t
6.7.9 Adjust the EBS pulse train to follow the DAC over the l
entire gate length. Record the EBS control settings.
O I
54F VISE D E S F E CYWE o^"
3.2 of 78 DATE June 13.1984 rant
.*I83 PsNIO 1014 640 t
h NSID 1778W:42A/061384 DMW-ISI-154 Rev. 0 l
g, G
6.7.10 The electronic DAC module function shall then be initiated.
6.7.10.1 Adjust the electronic DAC controls so all EBS i
I pulses are nominally 40% FSH.
j 6.7.10.2 Adjust the monitor gre threshold to the l
position where a 16* FSH alarm level is realized and set for positive trigger.
6.7.10.3 Disable the EBS, scan the block, and observe the responses from each applicable calibration i
reflector. The amplitude of each should be 40%
l FSH + ldB.
If not, review steps 6.7.1 through 6.7.10.3.
6.7.10.4 Decrease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer assembly over the calibration block at or greater than the specified examination speed.
The gate alarm shall actuate when the peak response from each hole is detected.
If the alarm is not observed for one or more of the I
holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition I
I rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.7.10.5 Increase the receiver gain by 6dB and record all l
pertinent calibration data on the calibration data sheets.
I m
b AF vtS ED OfECint 33 of 78 na:E o^1E June 13, 1984 c ac.
NseO 1014 Nf V 2183
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i O
6.7.11 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS response amplitudes. Position the transducer to obtain the peak responses from at least three cylindrical l
reflectors in the MTS which fall within the gated sweep length. Record the reflector identification, indication amplitude, and transtt time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
l, i
6.8 Calibration for Examination of Reactor Vessel Flange Ligaments System calibrttion for each straight beam inspection channel /
l
(
transducer combination used for flange ligament inspection shall be I
performed as described below, i
6.8.1 Attach the transducer to the appropriate fixture for the i
required incident angle and mount the assembly to the f
manipulator in the calibration tank.
6.8.2 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block and adjust for the required waterpath.
l i
6.8.3 Adjust the instrument delay such that the lower left I
corner of the initial pulse starts at the 0 gradicule on t
k the CRT.
i l
l i
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$1F v 5L O E lI E C fivl Dt June 13.1984 r ac.t 34 of 78 o^"
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1778W:42A/061384 DMW-ISI-154 Rev. O I
i O
i 6.8.3.1 Adjust the instrument range control to the maximum achievable sweep range where the initial pulse and entry surface reflection are displayed on the CRT screen. Record the transit time to j
the entry surface reflection.
i l
I 6.8.3.2 Since the gate position controls of the ultrasonic system are calibrated directly in units of time, the gate can be moved to coincide with the eatry surface reflection and travel j
time in microseconds can be read directly from ihe digital display. All transit time m<.asurements can be made in this manner.
f 6.8.3.3 Determine the sound velocity and measure the water temperature. Record these values.
A y, Round Trip Distance Travel Time j
r i
l l
6.8.4 Adjust the instrument delay such that the lower lef t I
corner of the entry surface reflection starts at the 0 l
gradicule on the CRT.
6.8.4.1 Adjust the instrument range such that metal travel between the entry surface reflection and l
l the reflection from the applicable reference hole at the longest test metal distance occupies I
60% to 90% of the full sweep length.
t 3
6.8.4.2 Record the transit time between the entry surface reflection and the reflection from the i
reference hole.
l 0
Af vtSED DFfClivE 35 of 78 nait DATE June 13. 1984 nac.t N%iD 1014 64L v 218 3 l
.. ~. _ _.. -. _. _ _., _.,. _, -. _ _ _. _..,,,. _.. _ _ _,. _..... -. _. _... _ _,, _ _.....
h NSID DMW-ISI-154 Rev. O 1778W:42A/061384 g
t
'C/
6.8.4.3 Calculate the sound velocity in the calibration block and record this value.
6.8.4.4 Adjust the selected gate controls to include all metal travel between the water / steel interface and the far limit of the inspection volume as defined in the Examination Program Plan. This distance shall be the equivalent of one stud hole diameter, as a minimum.
6.8.5 Set the trace and gate baselines to zero percent of scale.
l 1
i 6.8.6 Position the transducer to obtain the maximum response from the side drilled hole which exhibits the highest l
ampli tude. Adjust the preamplifier gain control to set l
l the indication amplitude to 40% (+ IdB) of full screen l
g3 C/
height. Mark the peak of the indication on the screen.
l Record instrument settings, indication amplitude, and transit time from the entry surf ace reflection to tne indication.
i l
6.8.7 Without changing instrument settings move the transducer j
to obtain the maximum responses from the remaining l
calibration holes. Mark the peak of the indications on f
the screen. Record the indication amplitudes and transit times from the water / steel interface to the indications.
1 6.8.8 Draw a line through the maximu'n response points on the CRT screen. The curve may be extrapolated at either end for a distance of one-quarter the thickness of the calibration block. This line represents the basic calibration distance ampl;tude curve (DAC).
l l
b) f i
I I
RI USE D D F E CilVL 0'it June 13.1984 o nc.r 36 of 78 0"E MID 1014 H e v.t l 8 3
h NSID DMW-ISI-154 Rev. 0 1778W:42A/061384 p
6.8.9 Adjust the EBS pulse train to follow the DAC over the entire gate length. Record the EBS control settings.
6.8.10 The electronic DAC module function shall then be initiated.
6.8.10.1 Adjust the electronic DAC controls so all EBS I
pulses are nominally 40% FSH.
6.8.10.2 Adjust the monitor gate threshold to the position where a 16% FSH alarm ievel is realized and set for positive trigger, i
l 6.8.10.3 Disable the EBS, scan the block, and observe the responses from eacn appifcable calibration f
I re flector.
The amplitude of each should be at 40% FSH + idB.
If not, review steps 6.8.1 through 6.8.10.3.
6.8.10.4 Decrease the receiver gain by 6dB. Switch the
{
system to the cycle mode and scan the transducer assembly over the calibration block at or l
greater than the specified examination speed.
The gate alarm shall actuate when the peak response from each hole is detected.
If the alarm is not observed for one or more of the holes, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.8.10.5 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration data sheets.
OO 91 vst :
E U E Cfivt 37 of 78 nm NE June 13, 1984
- rac, N%ID 1014 ott v p l 3 )
i NSID DMW-ISI-154 Rev. 0 1778W:42A/061384 i
I V
6.8.11 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS response amplitudes. Position the transducer to obtain the peak responses from at least three cylindrical reflectors in the MTS which fall within the gated sweep length. Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse.
Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
6.9 Calibration for Full Node Angle Beam Examination of Vertical and Circumferential Vessel Welds i
'm System calibration for each inspection channel / transducer
()
combination used for full node angle beam examination of the volume of material near the vessel inside diameter shall be performed as described below.
6.9.1 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the i
manipulator in the calibration tank.
6.9.2 Position the transducer to direct the sound toward the appropriate surface of the calibration block at the required waterpath. Record the transit time, from the initial pulse to the entry surface reflection.
6.9.3 Position the transducer to obtain a maximum full node response from the square notch on the entry surface of the l
block.
l m usw totctnt o^"
rac.t 38 of 78
^'E June 13.1984 N%iD 3014 HI v 2.) 6 3
h NSID 1778W:42A/061384 DMW-ISI-154 Rev. O j
l pN l
6.9.4 Adjust the instrument delay such that the lower lef t l
corner of the entry surface reflection starts at the 0 i
gradicule on the CRT.
6.9.4.1 Mjust the instrument range such that metal l
[
travel between the entry surface reflection and the notch response occupies 50% to 80% of the j
full sweep length.
l i
6.9.4.2 Record the transit time between the entry I
surface reflection and the notch response.
i 6.9.4.3 Mjust the selected gate controls to include all metal travel between the 7/8 node and 1 1/8 node responses from the 1/4T hole,
()
6.9.5 Set the trace and gate baselines to zero percent of scale.
n l
6.9.5 Mjust the preamplifier gain control to set the notch full I
node response indication to 40% + IdB of full screen I
height. Mark the peak of the indication on the screen.
I I
Record instrument settings, indication amplitude, and 4
I transit time from the entry surface reflection to the i
indication.
6.9.7 Draw a horizontal line through the maximum response point on the CRT and extend it to include the entire gate i
length. This line represents the basic calibration distance amplitude curve (DAC).
l l
l I
O V
s l
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6.9.8 Adjust the EBS pulse train to follow the DAC over the entire gate length. Record the EBS control settings.
l 6.9.9 Adjust the monitor gate threshold to the position where a 16% FSH alarm level is realized and set for positive trigger.
j i
6.9.9.1 Disable the EBS, scan the block, and observe the response from the notch.
The amplitude should be at 40% FSH + IdB.
If not, review steps 6.9.1 i
through 6.9.9.1.
6.9.9.2 Decrease the receiver gain by 6dB. Switch the system to the cycle mode and scan the transducer
{'
over the calibration block at or greater than the examination speed. The gate alarm should AQ actuate when the peak response from the notch is detected.
If the alarm is not observed for the j
notch investigate to identify the test system paramter(s) (e.g., alarm count, repetition rate, alarm level, etc.) which may require adjustment and make corrections, if necessary.
6.9.9.3 Increase the receiver gain by 6dB and record all pertinent calibration data on the calibration j
data sheets.
i 6.9.10 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the responses f
from the MTS reflectors. Position the transducer to obtain the peak responses from at least three cylindrical l
reflectors in the MTS which fall within the gated sweep l
length.
Record the reflector identification, indication I
amplitude, and transit time to the indication from the initial pulse.
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Reflectors selected for this step shall provide transit times representative of those for the primary reflectors in the basic calibration block where practical.
6.10 Calibration for Near Surface Examinations I
t I
System calibration for each inspection channel / transducer combina-tion used for near surface examination of volumes of material near the vessel inside diameter shall be performed as described below.
I 6.10.1 Transducers used for these examinations shall be dual-element, transmit-receive, 2.25 MHz units of the type Ul tran WKSI-2.25 WRV, WPSI-2.25 WRV, or equivalent. The nominal waterpath shall be 6.0 inches and the nominal incident angle shall be 12.5* unless otherwise spect fied.
O 6.10.2 Attach the transducer to the appropriate fixture for the required incident angle and mount the assembly on the l
manipulator in the calibration tank.
l l
6.10.3 Position the transducer to direct the sound beam toward the appropriate surface of the calibration block at the l
i required waterpath. Record the transit time from the l
initial pulse to the entry surface reflection.
NOTE I
i It may be necessary to increase the gain and/or use one i
search unit element in the pulse-echo mode to obtain a discernable entry surface reflection.
I 6.10.4 Posi ttori the transducer to obtain a maximum response from the 1/8-inch diameter side drilled hole located 3/4-inch ist depth from the entry surface.
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,l 6.10.5 Adjust the instrument delay such that the lower lef t w
I corner of the entry surface reflection starts at the 0 gradicule on the CRT.
i I
6.10.5.1 Adjust the instrument range such that metal travel between the entry surface reflection and the response from the 1/8" diameter side drilled hole at 3/4-inch depth occupies 50% to 75% of the full sweep range.
6.10.5.2 Record the transit time between the entry surf ace reflection and the hole response.
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6.10.5.3 Mjust the selected gate controls to include as a minimum all metal travel from the lower lef t corner of the entry surface reflection to at f
least 10 microseconds past the response from the
{
i 1/8-inch diameter hole at 3/4-inch depth.
6.10.6 Set the trace and gate baselines to zero percent of scale.
6.10.7 Mjust the preamplifier gain control to set the indication from the 1/8-inch diameter hole at 3/4-inch depth to 80% +
IdB of full screen height. Mark the peak of the indication on the screen, 6.10.8 Without changing instrument settings move the transducer i
to obtain maximum responses from the two remaining calibration holes and the square notch on the entry surface of the block.
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l 6.10.9 Record instrument settings, indication amplitudes (i.e.,
l 100% FSH + 6dB), and transit times from the water / steel interface (see tbte Paragraph 6.10.3) to the indications.
1 6.10.10 Draw a horizontal line through the response from the 3/4 inch deep hole on the CRT screen. The curve shall be i
extrapolated at either end to cover the entire gate length as set in Paragraph 6.10.5.3.
(
6.10.11 Adjust the EBS pulse train to follow the DAC over ihe entire gate length.
Record the EBS control settings.
6.10.12 Adjust the monitor gate threshold to the position where a I
40% FSH alarm level is realized and set for positive l
trigger.
D 6.10.12.1 Disable the EBS, scan the block, and observe the response from the 1/8 inch diameter side drilled l
hole at 3/4 inch depth. The amplitude should be l
at 80% FSH + IdB.
If not, review steps 6.10.2 i
i through 6.10.12.1.
i I
I 6.10.12.2 Decrease the receiver gain by 6dB. Switch the j
system to the cycle mode and scan the transducer over the calibration block at or greater than l
the examination speed. The gate alarm shall actuate when the peak response from the 3/4 inch deep 1/8 inch diameter side drilled hole is detec ted.
If the alarm is not observed, investigate to identify the test system parameter (s) (e.g., alarm count, repetition rate, etc.) which may require adjustment and make corrections, i f necessary.
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v 6.10.12.3 Increase the receiver gain by 6 dB and record all pertinent calibration data on the calibration data sheets.
6.10.13 Move DEC Delay 1 to a position past the end of the gated sweep, i.e. where the DEC will not influence the MTS response amplitudes. Position the transducer to obtain i
the peak responses from at least three cylindrical t
reflectors in the MTS which fall within the gated sweep length. Record the reflector identification, indication amplitude, and transit time to the indication from the i
initial pulse.
Reflectors selected for this step shall provide transit times representative of the transducer focal distance, approximately nine inches in water.
q V
6.10.14 Examinations shall be performed with the receiver gain at a level where the general noise level from the cladding is 25% of full screen height. The resulting receiver gain setting shall be recorded on the UT System Controller Data Sheet and identified as " scanning sensitivity".
All mapping of indications shall be at this level. Field system calibration shall be verified at the receiver gain f
I recorded per paragraph 6.10.12.3.
6.11 Bean Spread Measurements Beam spread measurements shall be made for each transducer used during the inspection program. Data will be recorded on the appropriate calibration data sheet.
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1778W:42A/061384 DMW-ISI-154 Rev. O 6.11.1 Establish the location of the scribe line on the reference block as a zero reference point.
6.11.2 Position the transducer to obtain the maximum indication j
amplitude from the applicable calibration hole at the l
nearest test <11 stance in the appropriate basic calibration block. Record the manipulator carriage location with respect to the zero reference point and the transit time to the indication.
f i
6.11.3 Move the transducer toward the reference hole until the indicaticn amplitude drops to 50% of its peak amplitude.
Record the manipulator carriage location with respect to the zero refers nce point and the transit tf~e to the indication. Nye the transducer toward the reference hole until the indication amplitude drops to 20% of its peak
(
amplitude and record data defined above.
6.11.4 Move the transducer away from the reference hole until the indication amplitude passes through maximum and again drops to 50% of its peak amplitude. Racord the j
manipulator carriage location with respect to the zero l
reference point and the transit time to the indication, j
Move the transduccr away from the reference hole until the l
indication amplitude drops to 20% of its peak amplitude and record data defined above.
6.11.5 Repeat these measurements on the other applicable calibration holes.
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I 6.12 Field System Calibration j
On site the system calibration shall be establish?d and verified with the EBS per Paragraph 6.12.1 at the beginning and end of each scan routine, with any change of equipment, or every four hours, whichever is less. Calibration shall be established and verified on the HTS cylindrical reflector array per paragraph 6.12.2 at the beginning and end of each series of examinations, with any change of i
equipment, or each week the system is in use, whichever is less.
L 6.12.1 Enable the EBS and observe the pulse train.
6.12.1.1 If any point on the DAC curve has decreased by j
20% or 2dB of its original amplitude, f
calibration shall be re-established and all j
areas since the previous acceptable calibration l
p)
C or check reexamined.
6.12.1.2 If any point on the DAC curve has increased by 20% or 2dB of its original amplitude, calibration shall be re-established and all reportable indications since the previous acceptable calibration or check reevaluated.
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6.12.2 Disable the EBS function and position the transducer array such that it is directed toward the cylindrical reflector array muunted on the tool O' leg.
Each applicable transducer / inspection channel should be checked as follows:
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V 6.12.2.1 Move DEC Delay 1 to a position past the end of l
l the gated sweep, i.e. where the DEC will not i
influence the MTS responses from the MTS
!f, re flectors. Position the transducer to obtain the peak responses from each cylindrical reflector in the MTS array used during initial system calibration at the specified waterpaths.
Record the reflector identification, indication amplitude, and transit time to the indication from the initial pulse in microseconds, i
t 6.12.2.2 The recorded values should be compared to the data obtained during the initial calibration at j
j i
Waltz Mill, 6.12.2.2.1 If the response from any reflector has decreased by 20% or
[
I 2dB of its original amplitude, l
calibration shall be reestab-U l
lished and all areas since the previous acceptable calibration I
l or check reexamined.
i 6.12.2.2.2 If the response from any
}
8 reflector has increased by 20% or I
2dB of its original amplitude, calibration shall be reestab-l lished and all reportable i
r indications since the previous j
acceptable calibration or check reevaluated.
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6.12.2.2.3 If the response from any reflector in the gated sweep length has moved on the sweep l
line more than 10". of the sweep reading, correct the sweep range calibration and note the l
correction in the examination record.
If recordable reflectors are noted on the data sheets, those data sheets shall be voided, the new calibration shall be recorded, and areas relative i
to the voided data re-examined.
6.12.3 Reposition DEC Delay 1 to the delay position established i
during system calibration, a
6.12.4 Verification of the performance of all calibration checks shall be documented. Documentation shall include the date, time, and initials of the operator. See Figure 5.
In addition, the operator shall document calibration verification at the beginning and end of a weld scan via j
signature on the computer data printout.
6.13 Transducer RF Waveforms Photographic records of transducer RF waveforms shall be collected as follows.
These records shall be made at the reactor site.
6.13.1 Position the transducer to obtain the peak response from an appropriate reference reflector.
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6.13.2 Display the RF waveform on a calibrated oscilloscope.
i 6.13.3 Mjust the oscilloscope sweep controls to clearly display the waveform.
l 6.13.4 Adjust the oscilloscope veritical display so the amplitude j
of the response is two to four centimeters.
j 6.13.5 Photograph the displayed waveform and record all pertinent data on the Transducer RF Waveform Data Sheet, Figure 6.
6.13.6 Photographic records of transducer RF waveforms collected after reactor vessel examinations should be made using the same reflector, electronics, waterpath and instrument i
settings as used prior to the examinations when practical.
7.0 EXAMINATION REQtilREMENTS l
7.1 The following activities shall have been completed prior to the performance of any in-field ultrasonic examination of a reactor vessel using the remotely operated inspection tool.
i i
I 7.1.1 The reactor vessel Examination Program Plan identifying l
specific plant inspection parameters such as search unit incident angles, calibration standards, water paths, scan lengths, scan locations, and scan increments shall have 4
been prepared.
i 7.1.2 The ultrasonic equipment shall have been calibrated for all examinations required by the Examination Program Plan l
and all data recorded in accordance with paragraph 6.0 of this procedure.
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l 7.1.3 The reactor vessel inspection tool shall have been assembled in the configuration on the arrangement drawing applicable to the specific vessel being examined as listed in the Examination Program Plan.
7.1.4 Prior to placing the inspection tool on the reactor I
vessel, the following tests and checks shall be performed to demonstrate the tool is fully operational and to assure the tool can be safely set on the reactor vessel.
7.1.4.1 Establish "home" position and record all resolver readings and other relevant data.
Mechanically measure the distance from the face of transducer zero (TRO) or transducer twenty l
(TR20) to the spherical target and record this I
value.
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7.1.4.2 Test to ensure that all drives are functional both in manual and computer control.
7.1.4.3 Visually verify that all appropriate hardware is properly secured by lockwire or other suitable means.
L 7.1.4.4 Check each transducer and associated pulser /
amplifier channel by tapping on the face of the transducer and observing the initial pulse.
7.1.4.5 Cavity water clarity shall be adequate to assure visibility of the vessel flange, keyways, and/or core barrel seating surface.
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7.1.4.6 Verify that no specimen capsules are installed f
where the inspection tool legs will seat.
7.1. 5 The calibration settings of each transducer /instrumenta-tion system shall be checked using t!.; data previously entered in the Electronic Block Simultor (EBS) with the l
Sonic system control settings as defined on the Calibra-l tion Data Sheets for each examination to be performed.
7.1.6 Once the inspection tool is set on the reactor vessel the tool home position shall be verified by monitoring the TRO or TR20 straight beam inspection channel and positioning the search unit to obtain a peaked response from the spherical target without changing waterpath from that set mechanically in 7.1.4.1.
Contact the control room every two days, obtain the refueling water temperature, and g
V record this value on a form similar to the one shown in Figure 7.
If the temperature is not within,+ 25*F of that used during calibration, advise the control room to notify when temperature is within this range.
Al ternately, water temperature may be measured directly with a thermometer, not considered MTE equipment. Mercury thermometers are l
not acceptable for this application.
7.1.7 Calculate the water velocity, record this value, and compare with that determined during system calibration.
l 7.1.8 Check the instrument calibration and system calibration.
7.2 Prior to initiating a scan per the Examination Program Plan, the flange area shall be subject to preliminary scans while monitoring the TRO or TR20 inspection channel to determine that the tool is properly centered, level, and that water paths (compensated for n
difference in water velocity, if necessary) correspond with those used during calibration.
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h NSID 1778W:42A/061384 DMW-151 154 Rev. 0 7.3 The area to be exa'nined shall be subject to a preliminary scan while monitoring the TRO inspection channel to determine the thickness of the examination area. Ultrasonic thickness readings for each 30plicable exam catagory shall be recorded on a form similar to the one shown in Figure 8.
Use this information to verify that all gates have been set properly.
If gating adjustments are necessary at any time during the examination they shall be documented. See i
Figure 9.
7.4 Each area of the reactor vessel identified in the Examination Program Plan shall be scanned in accordance with the requirements of the Examination Program Plan.
1 i-7.4.1 The computer " heme" routine shall be used to determine the actual reference position for the nine axes of tool i
movement at least once each day. When a computer "home" is achieved, a peaked response from the spherical target l
should be observed on the TRO or TR20 inspection channel and the axes resolver readings shall be noted and compared with those original values recorded per paragraph 7.1.4.1.
7.5 During scanning the following parameters shall be maintained unless otherwise specified in the Examination Program Plan.
7.5.1 Scanning shall be conducted at the calibration sensitivity.
7.5.2 The rate of search unit movement shall be 5 inches per second maximum.
7.5.3 Scan increments shall be three-quarter inches maximum fer l-1/2 inch diameter transducers and three-eighth inches maximum for 3/4 inch diameter transducers.
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f 7.5.4 The required examination volume for welds shall include the weld, both heat affected zones, and one-half the weld thickness of adjacent base material on both sides of the l
wel d.
7.6 The following paragraphs provide general scanning requirements for i
each area of tt.e reactor vessel. Specific requirements are provided in the Examination Program Plan.
7.6.1 Base Metal Examination i
I l
When specified in the Examination Program Plan, the base i
metal through which angle t eams will pass shall be completely scanned by straight beam to detect laminar i
reflectors where practical.
O 7 e.1.1 Sensitivits saali de esteblished et e iocet4en free of indications by adjusting the first back surface reflection to 80% FSH.
i 7.6.1.2 Set the back wall gate to monitor the back i
i surface reflection and alarm when the echo i
amplitude drops to 16% FSH.
i 7.6.1.3 Alternately, the base metal examination may be i
conducted as an extension of straigi,t beam examination in accordance with paragraph 7.6.2.1 t
provided the sensitivity is at least that required in paragraph 7.6.1.1 and the gating and alarm requirements of paragraph 7.6.1.2 are i
t employed.
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h NSID 1778W:42A/061384 DMW-ISI-154 Rev. O f\\J 7.6.2 Vertical and Circumferential Vessel Welds The extent of each reactor vessel vertical and/or j
i circumferential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.
7.6.2.1 The entire weld, both heat affected zones, and specified adjacent base material are examined from the vessel ID by longitudinal waves at 0*'.
t 7.6.2.2 The entire weld, both heat affected zones, and specified adjacent base material are examined from the vessel ID by transverse waves at two angles, the difference between which shall be at least 10*, in two opposite directions parallel l
to the weld and two opposite directions perpendicular to the weld.
For purposes of minimum required coverage, adjacent base material need not be examined with both angle beams in both directions.
Any combination of two angle beams will satisfy this requirement.
I 7.6.3 Reactor Vessel Flange-to-Upper Shell Weld i
The extent of the reactor vessel flange-to-upper shell weld identified in the Examination Program Plan shall be i
i examined in accordance with the following requirements i
where practical.
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7.6.3.1 The reactor vessel flange-to-upper stell weld, both heat affected zones, and specified adjacent l
base material are examined from the vessel f
flange seal surface using longitudinal waves at angles as defined in the Examination Program f
i Plan.
i I
7.6.3.2 When the core barrel is removed the flange-to-j upper shell weld may be examined from the vessel ID in accordance with Paragraph 7.6.2, except angle beam scanning perpendicular to the weld will be performed from the vessel shell side only.
7.6.4 Reactor Yessel Nozzle-to-Shell Welds (D
The extent of each reactor vessel nozzle-to-shell weld
(>
identified in the Examination Program Plan shall be examined in accordance with the following requirements I
where practical.
i 7.6.4.1 The reactor vessel nozzle-to-shell weld, both heat affected zones, and specified adjacent base material are examined from the nozzle bore using angles and modes as defined in the Examination Program Plan.
i l
NOTE RHR flow should be off or reduced to the extent possible during this. examination. Water clarity shall be such that the nozzle opening is clearly visible from the operating deck.
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V 7.6.5 Nozzle Radius and Protrusion j
l The extent of each nozzle radius or protrusion identified in the Examination Progran Plan shall be examined in accordance with the following requirements where practical, l
7.6.5.1 The entire area defined by the Examination Program Plan is examined from the nozzle ID by j
transverse waves in both circumferential l
i directions.
NOTE i
RHR flow should be off or reduced to the extent possible
[
during this examination. Water clarity shall be such that i
I the nozzle opening is clearly visible from the operating l
deck.
e l
7.6.6 Nozzle-to-Safe Ends Welds The extent of each reactor vessel nozzle-to-safe end weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.
7.6.6.1 The entire weld, both heat affected zones, and specified adjacent base material are examined from the nozzle bore by longitudinal waves at 0*.
l 7.6.6.2 The entire weld, both heat af fected zones, and specified adjacent base material are examined l
from the nozzle bore by angled longitudinal waves in two directions parallel to the weld and two d'irections perpendicular to the weld.
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l NOTE RHR flow should be off or reduced to the extent possible during this examination. Water clarity shall be such that l
the nozzle opening is clearly visible from the operating deck.
7.6.7 Reactor Vessel Flange Ligaments l
The extent of the threaded ligaments in the reactor vessel flange identified in the Examination Program Plan shall be examined in accordance with the following requirements I
where practical.
I 7.6.7.1 The ligaments between threaded stud holes are examined from the top of the flange using longitudinal waves at 0*.
O v
7.6.8 Full Node Angle 8eam Examination of Vertical and Circumferential Vessel Welds When full node angle beam examinations are specified, the extent of each reactor vessel vertical and/or l
circumferential weld identified in the Examination Program t
Plan shall be examined in accordance with the following i
requirements where practical.
7.6.8.1 The volume of material including the weld, both heat affected zones, and specified adjacent base material within 1/8T of the vessel'IO shall be examined in two directions parallel to the weld and two directions transverse to the weld.
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7.6.9 Near Surface Examinations of Vertical and Circumferential Vessel Welds i
I When near surface examinations are specified, the extent of each reactor vessel vertical and circumferential weld identified in the Examination Program Plan shall be examined in accordance with the following requirements where practical.
7.6.9.1 The volume of material including the weld, both heat affected zones, and specified adjacent base material within one inch of the vessel ID shall be examined in two directions parallel to the weld and two directions transverse to the weld.
7.6.9.2 Refer to paragraph 6.10.14 for examination sensitivity adjustment based on clad nois,
8.0 INTERPRETATION AND INVESTIGATION j
l 8.1 The Level II or Level III examiner shall interpret indications in i
accordance with criteria listed below such that he can assess their being valid or not valid.
8.1.1 The interpretation and investigation level is 50% of the primary reference DAC for:
8.1.1.1 All indications detected during straight beam examinations of vertical and circumferential welds.
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NSID 1778W:42A/061384 DMW-ISI-154 Rev. 0 Ob 8.1.1.2 Indications detected during angle beam examinations of vertical and circumferential welds at transit times representing 25 percent l
and greater of the vessel through-wall thickness f
measured from the inner surface, j
i 8.1.1.3 Indications detected during examinations of the flange-to-upper shell weld from the seal surface at locations representing 25 percent and greater of the vessel through-wall thickness measured l
from the inner surface.
8.1.1. 4 Indications detected during examinations of nozzle-to-shell welds from nozzle bores at locations representing 25 percent and greater of the vessel through-wall thickness measured from the inner surface.
8.1.1.5 All indications detected during straight and angle beam examinations of nozzle-to-safe end l
8.1.1.6 All indications detected during examinations of reactor vessel flange ligaments.
l 8.1.1.7 All indications detected during full node angle i
beam examinations of vertical and circumferential welds.
8.1.1. 8 All indications detected during near surface examinations.
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8.1.2 The interpretation and investigation level is 20*. of the primary reference DAC for:
8.1.2.1 Indications detected during angle beam examinations of vertical and circumferential welds at transit times which represent the inner 25 percent of the vessel through-wall thickness measured from the inner surface.
8.1. 2. 2 Indications detected during examinations of the flange-to-upper shell weld from the seal surface at locations which are within 25 percent of the vessel through-wall thickness measured from the inner surface.
i 8.1.2.3 Indications detected during examinations of i
nozzle-to-shell welds from nozzle bores at l
locations which are within 25 percent of the vessel through-wall thickness measured from the inner surface.
8.1.2.4 All indications detected during examinations of 1
nozzle radii and protrusions.
l 8.1.3 The interpretation and investigation levels for the base mate; tel examination are defined as follows:
i 8.1.3.1 All areas where indications are equal to exceed the amplitude of the remaining back reflection.
8.1.3.2 All areas that produce a continuous total loss of back reflection accompanied by a continuous indication in a singular plane, i
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y 8.2 Valid indications are the result of flaw reflectors such as cracks,
[
lack of penetration, lack of fusion, inclusions, slag and porosity.
All other indications are considered not valid, including those due to:
scanning noise, grain structure, beam redirection, loss of interface gating, spurious noise from electrical sources, clad interface, straight beam back surface, mode conversion and geometric reflectors.
t 8.3 Valid indications meeting the criteria of paragraphs 8.1 and 8.2
' shall be investigated by the examiner in terms of the recording l
requirements in paragraph 9.0.
I 8.4 Other transducers, search units, frequencies, techniques, etc., may l
be used to aid interpretation and investiga'tfon.
9.0 RECORDING REQUIREMENTS I
9.1 All indications shall be identified as valid or non-valid on the data printout. Valid indications having amplitudes which equal or exceed the appropriate interpretation and investigation level within the OD and ID boundaries of the area being examined shall be f
recorded per the additional requirements of Paragraph 9.4 Valid indications having amplitudes less than the appropriate j
interpretation and investigation level need only have peak amplitudes noted on the data printout.
f 9.2 The " Flaw Detect" data acquisition system provides the following j
informa tion.
9.2.1 A digital readout defining the location of each of the j
nine axis of tool motion, f
C)
I l
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June 13,1984 m,r,nn..sv ii.,
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9.2.2 Identity of the inspection channel.
9.2.3 The number of indications exceeding the primary reference i
l evel.
9.2.4 A digital readout in microseconds of the transit time to the indication (s) referenced from the channel 0 interface position.
9.2.5 The indication amplitude (s) in percent of FSH.
9.3 For examinations of nozzle-to-shell welds from the nozzle bore, "A" f
scan data will be permanently recorded on videotape for review and interpretation in lieu of use of the " Flaw Detect" data acquisition system. The Sonic Mark VI display or an auxiliary scope saay be used.
Operation of the system is described as follows:
i d
j 9.3.1 Adjust the Sonic Mark VI delay and range controls such that the artificial interface marker, set at the transit
[
time defined during system calibration, falls on the first major screen division (10% of sweep length) and the end of the gate set, as a minimum, at the length defined during system calibration, falls on the ninth major screen 4
[
division (90% of sweep length).
9.3.2 Calculate the Sonic Mark VI horizontal sweep calibration in'usec/div at those sweep settings, i
i 9.3.3 If "A" scan data will be recorded from an auxiliary secpe in lieu of the Sonic Mark VI, paragraphs 9.3.3.1 through 9.3.3.4 are applicable, O
..: u w e i,e e tivt cau 62 of 78
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9.3.3.1 Establish an EBS pulse train to start at the I
sweep location described for the artificial j
interface and end at the sweep location l
described for the end of the gate.
l 9.3.3.2 Calibrate the sweep of the auxiliary "A" scan oscilloscope as follows. Adjust the sweep delay and range controls of the auxiliary "A" scan oscilloscope until the EBS signals described in 9.3.3 are at identical sweep locations as on the Sonic. Mark VI.
Af ter this adjustment is made, l
tape down the horizontal fine adjustment knob.
The horizontal sweep calibration (usec/div) of f
I the auxiliary "A" scan oscilloscope is then the same as taat determined for the Sonic tiark VI in paragraph 9.3.2.
I 9.3.3.3 Calibrate the vertical scale of the auxiliary "A" scan oscilloscope as follows. Adjust the EBS attenuation controls to obtain a 100% full l
screen height response for one EBS pulse on the Sonic Mark VI. View this same EBS pulse on the auxiliary "A" scan oscilloscope and adjust the vertical scale such that the amplitude is also 100% of full screen height. After this adjustment is made, tape down the vertical fine adjustment knob.
9.3.3.4 Check the vertical linearity of the auxiliary "A" scan oscilloscope por paragraph 5.2.
9.3.4 Field calibration checks with the EDS shall be recorded at l
the beginning and end of each nozzle examination.
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V 9.3.5 The following information, as a minimum, shall be prominently displayed on the recording.
l' 1
9.3.5.1 Plant identification.
9.3.5.2 Nozzle identification, i
9.3.5.3 Transducer / channel identification.
9.3.5.4 Artificial interface transit time and sweep position on the auxiliary display.
i l
9.3.5.5 bate delay and length.
Specify the gate end l
sweep position on the auxiliary display.
l l
I l
9.3.5.6 Sweep calibration in usec/div.
9.3.6 "A" scan, tool position, and timing information shall be l
permanently recorded for scans of nozzle-to-shell welds r
from the nozzle bores performed per paragraph 7.6.4.
l 9.4 The following additional information shall be generated and recorded I
on an indication data sheet, Figure 10, for each valid indication l
recorded in terms of a distance-amplitude-curve per paragraphs 8.1.1 and 8.1.2.
Prior to recording indications with 3 particular transducer / inspection channel, calibration and instrument lineartty shall have been verified within the periods spect fled.
l J
9.4.1 Maximum indication amplitude in percent of the DAC calibration curve, search unit location as defined by the nine axis of tool motion, and transit time from the water /
steel interface to the indication.
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9.4.2 Jog the search unit toward the reflector. Where a 20% DAC interpretation and investigation level is specified, record the search unit location as defined by the nine j
axes of tool motion and transit time from the water / steel interface to the indication for positions where the indication amplitude drops to 100% DAC, half-maximum l
amplitude (for indications with peak t.mplitudes exceeding 100% DAC), 50% DAC, and 20% DAC. Where a 50% DAC interpretation and investigation level is specified, this information shall be recorded for the 100% DAC, half-maximum amplitude (for indications with peak amplitudes exceeding 100% DAC), and 50% DAC positions only.
9.4.3 Jog the search unit away from the reflector. Where a 20%
DAC interpretation and investigation level is specified, j
record the search unit location as defined by the nine l
axes of tool motion and transit time from the water / steel l
interface to the indication for positions khere the indication amplitude drops to 100% DAC, half-maximum amplitude (for indications with peak amplitues exceeding 100% DAC), 50% DAC,and 20% DAC. Where a 50% DAC interpretation and investigation level is specified, this information shall be recorded for the 100% DAC, half-maximum amplitude (for indications with peak amplitudes exceeding 100% DAC), and 50% DAC positions only.
9.4.4 Jog.the search unit back to the area of maximum amplitude and peak the indication. Where a 20% DAC interpretation and investigation level is specified, the length of the reflector shall be determined by scanning along the l
reflector's major dimension and recording search unit locations as defined by the nine axes of tool motion where the indication amplitude drops to 100%, 50%, and 20% of
/N the DAC curve. Where a 50% DAC interpretation and investigation level is specified, this information thall be recorded for the 100% and 50% DAC positions only, 54f el D f6f(Ctwl D'"
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v 9.5 Valid indications identified during the base material examination per paragraph 8.1.3 shall be recorded on the data printout in terms j
l of transit time to the indication, peak indication amplitude, and length and width measurements taken from the points at which indication and backwall amplitudes are equal.
I 9.5.1 Areas identified per paragraph 8.1.3.1 shall be investigated to determine if and to what extent they l
interfere with angle beam examinations.
Where reflectors do interfere, the angle beam technique (s) shall be I
reviewed toward achieving at least the minimum required coverage of the volume to be examined, and modified to the I
extent necessary and practical to accomplish this.
i 9.5.2 Areas identified per paragraph 8.1.3.2 shall be i
investigated in terms of the appropriate acceptance
{
ob criteria for laminar reflectors.
9.6 Disassembly of the inspection tool shall not comence until all recorded indications have been assessed in terms of the applicable a
code criteria, and results are recorded on an indication analysis l
f table similar to that shown in Figure 11.
10.0 EXAMINATION RECORDS 4
The following information shall be provided to document the examinations.
l 10.1 The test procedure i
l 10.2 Description of the test system i
I i
10.3 Calibration records r^
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DMW-ISI-154 Rev. 0 l
gs L-i 10.4 Identification and location of extent of areas examined i
10.5 Record of all indications recorded 10.6 Record of all evaluations of indications 10.7 Personnel certifications 10.8 Dates and times of examinations i
10.9 Basic calibration bicek identification l
10.10 Couplant 10.11 Surface condition and surfaces from which examinations were performed.
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.T__! T L E MANUAL ULTRASONIC EXAMINATION
_O.F WFLDS IN REACTOR VESSELS
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MANUAL ULTRASONIC EXAMINATION OF WELDS IN REACTOR VESSELS l
1.0 SCOPE
,i i
i l
1.1 This procedure defines requirements for manual ultrasonic examination of full penetration longitudinal and circumferential pressure retaining welds in ferritic reactor vessel material that is l
greater than 2 inches thick.
1.2 This procedure satisfies the requirements of the 1980 Edition of l
l Section XI of the ASME Boiler and Pressure Vessel Code with addenda i
through the Winter,1980 and the Duquesne Light Company Position on USNRC Regulatory Guide 1.150. Technical contents are based on the ASME Code, including Section XI, IWA-2240, when dictated due to Code omissions and to implement upgraded technology or good practice.
V 1.3 Procedure DMW-ISI-101, "Preservice and Inservice Examination Documentation"; Procedure DMW-ISI-10, " Qualification of Ultrasonic Manual Equipment"; and the Beaver Valley Unit 2 Examination Progran Plan (EPP) are considered part of this procedure. The specific scope of the examinations that are to be performed on all welds and/or areas of systems and components shall be as defined in the Beaver Valley Unit 2 EPP.
~
2.0 GENERAL REQUIREMENTS 2.1 Personnel performing examinations per this procedure shall be certified to at least Level 11 for ultrasonic examinations in l
accordance with Westinghouse procedure PA 10.1 or approved equivalent procedures based on SNT-TC-1 A as modified by requirements in the 1980 Edition of Section XI of the ASME Boiler and Pressure Vessel Code with Addenda through the Winter,1980. Personnel certified as any NDE level for ultrasonic examinations may be employed as assistants.
v I Of l9 l'g"'
y
'7d* June 27,1984 o
N%AD 1013 H E V 'ib3
W 1SID i DMW-ISI-147, Rev. 0
' 878W:42A/061884 pi Ultrasonic flaw detection instruments shall be of the pulse echo vl 2.2 type with an A-scan presentation and shall be qualified to the requirements of DMW-ISI-10 before and af ter examining all applicable i
reactor vessel welds.
i i
Piezoelectric transducers shall have a maximum surface area of one l
2.3 square inch. The nominal frequency shall be 2.25 MHz. The transducers shall be capable of producing satisfactory calibrations i
at nominal refracted bean angles of 0* (longitudinal wave) and 45*
r i
and 60* (transverse wave). Other transducers may be used for supplemental investigations and where metallurgical characteristics preclude use of the transducers specified above.
If it is necessary to change either or!(oth the 45' and 60* angles, two other angles shall b6 use~d. Ths angular difference between the two angles shall be at least 10*. 'The maximum refracted angle shall not exceed 70*.
l 2.4. The couplant used during the examinations shall be a suitable iiquid, semi-liquid, or paste, such as Echogel, Exosen, Sonotrace,
.'Irim, Ultragel, or glycerine. The couplant shall contain no more than 1". by weight of re51 dual sulphur and halogens.
,'h,
2.5 The' item to be examined, including the required extent of adjacent volume to be examined, shall be defined in the Beaver Valley Unit 2 y
EPb This in'formatiod shallye provided to the examiner assigned tt conduct the examination The required volume shall be examined to I
~
the maximum extent,practicat.' The-extent of the required volume G
that cannot be exaniined during'the preservice examination shall be e
noted in-the report o,f recorded examination in accordance with
~.
j.
f-
< DMW-I SI-101.
.; W y,
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1 s.
t
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4 w 2.6 :~ Thb transducer scan surfaces, including the weld crown, shall be
+
< essentially free of dirt, spatter, paint, coatings and
- ^
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irregularities that would impair the smooth, uninterrupt contact of
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the search unit with the entry surface or the effective coupling of
'Q thesoundbeamintothematerialbeingexamined.
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2.6.1 The preparation of examination surf aces along with examination area access support (e.g., scaffolds, lighting, etc.) when requested by the examiner, shall be i,
the responsibility of the utility.
l 1
i 2.7 Each pass or scan of the transducer shall overlap at least 10% of j
the transducer (piezoelectric element) dimension perpendicular to l
l the direction of scan.
I i
2.8 The rate of search unit movement shall not exceed six inches per second.
j 2.9 Scanning shall be performed at a gain setting at least two times
(+ 6 dB) the reference level. When this is not feasible, the cause or reason shall be documented.
,]
2.10 The basic calibration block containing the basic calibration reflectors used to establish a primary reference response of the examination system and to construct a distance-amplitude correction curve shall satisfy the requirements of the 1980 Edition of the ASME Boiler and Pressure Vessel Code with addenda through the Winter of I
i 1980. Calibration blocks and a listing of the weld or groups of welds for which they are individually applicable shall be identified in the EPP.
3.0 SYSTEM CALIBRATION-GENERAL REQUIREMENTS 3.1 Prior to performing examinations, the complete examination system shall be calibrated on the applicable calibration block (s) for the examinations to be performed. The examination system is defined as the ultrasonic instrument (and battery pack, if applicable);
cable'.s); transducer (s); couplant; any other apparatus, instrument, l
or circuit employed between the instrument and the calibration block surface. Once calibration has been established, any change to any l {}
part of the examination system will require verification of the original calibration. See paragraphs 6.2 and 6.3.
3 of 19 H'y o'
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3.2 The centerline of search units shall be at least 1-1/2 inches from the nearest side of the block when calibrating on standard reference blocks. The front of the search unit shall be oriented i
i approximately parallel to the major axis of the reference reflector (sound beam perpendicular to major axis of reflector). The sound beam shall not be directed into the corner formed by the hole and the side of the block. Staggered holes shall be utilized for straight beam calibration and in-line holes for angle beam t
calibration.
3.3 The temperature difference between the surface of the calibration block and the surface of the item to be examined shall not exceed 25'F.
3.4 Each calibration shall be perfonned from the surface (clad or unclad) corresponding to the surface of the component from which the examination will be performed.
g V
3.5 The ultrasonic instrument shall provide linear vertical presentation within + 5% of the full screen height for at least 80% of the calibrated screen height (base line to maximum calibrated screen point (s)). The instrument screen height /linearity shall be verified per paragraph 2.2 before and after examining all applicable reactor vessel welds.
3.6 The ultrasonic instrument shall utilize an amplitude control, i
accurate over its useful range to + 20% of the nominal amplitude ratio, to allow measurement of indications beyond the linear range i
of the vertical display on the screen. The instrument amplitude control linearity shall be verified per paragraph 2.2 before and l
after examining all applicable reactor vessel welds.
l t
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! DMW-ISI-147, Rev. 0 1878W:42A/061884 3.7 Any controls which affect the instrument linearity (e.g., reject, or I
clipping) shall be in the off or minimum position for linearity l
checks, calibrations, and examinations. Once adjustment of filters is established during system calibration, they shall remain fixed l
for the period of the examinations for which the calibration is i
applicable.
i l
3.8 Photographic records of RF pulse waveforms shall be obtained for l
each transducer, before and after examining all applicable reactor vessel welds. Photographic records of transducer RF waveforms shall j
be collected as follows.
(
i f'
3.8.1 Position the transducer to obtain the peak response from l
an appropriate reflector, e.g. backwall.
3.8.2 Display ths RF waveform on a calibrated oscilloscope.
.O)
(
3.8.3 Adjust the oscilloscope sweep controls to clearly display the waveform.
3.8.4 Adjust the oscilloscope vertical display so the amplitude of the response is two to four centimeters.
3.8.5 Photograph the displayed waveform and record all pertinent t
data. See Figure 1.
l 3.8.6 Photographic records of transducer RF waveforms collected l
after reactor vessel examinations should be made using the l
l same reflector, electronics, and ir.strument settings as l
used prior to the examinations when practical.
t l
l 3.9 Documentation of general calibration data shall be in accordance l
with DMW-ISI-101.
- Denotes where IWA-2240 is involked as referenced in 1.2.
5 of 19 agst
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4.0 STRAIGHT BEAM CALIBRATION 4.1 Sweep range shall be calibrated to provide linear spacing of the appropriate reflectors:
4.1.1 Position the search unit to obtain the maximum response from the 1/4 T side-drilled hole. Position the lef t edge of the 1/4 T hole indication to 20% of the sweep length.
i 4.1.2 Position the search unit to obtain the maximum response from the 3/4 T hole. Position the left edge of the 3/4 T hole indication to 60% of the sweep length.
4.1.3 The delay and range controls shall be adjusted until the i
indication from the 1/4 T hole starts at 20% of the sweep length and the indication from the 3/4 T hole starts at f?
60% of the sweep length.
N 4.2 The distance-amplitude correction (DAC) curve shall be established in the following manner:
4.2.1 Position the search unit to obtain the maximum response from the calibration hole that produces the highest i
amplitude signal.
4.2.2 Adjust the instrument sensitivity to obtain an 80% full l
screen height indication from the hole. The location of the peak amplitude of the indication shall be marked on the screen of the test instrument. The sensitivity established in this step is referred to as the reference sensitivity.
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4.2.3 With the search unit at this peaked signal location, the system vertical linearity will be re-verified by I
decreasing the instrument sensitivity by 6 dB, and then by r
an additional 6 dB. The resulting signal decreases shall be within 32% to 48% full screen height and 16% to 24%
i full screen height, respectively.
I, f
4.2.4 Position the search unit to obtain the maximum response from another calibration hole and the peak indication location shall be marked on the instrument screen.
l i
4.2.5 Position the search unit to obtain the maximum response from the third calibration hole and the peak indication location shall be marked on the instrument screen.
i i
t i
4.2.6 The three marked points on the instrument screen shall be' connected by a smooth curve which is extended through the n
full thickness to be examined to form the distance-amplitude correction curve.
4.3 Docunentation of data obtained during straight beam calibration shall be in accordance with DMW-ISI-101.
5.0 ANGLE BEAM C ALIBRATION l
l 5.1 Sweep range shall be calibrated to allow display of the maximum thickness required to be examined within 80% of the sweep length.
The sweep shall be calibrated as follows to provide linear spacing of the appropriate reflectors.
t 5.1.1 Position the search unit for the maximum response from the 1/4 T side-drilled hole in the applicable calibration block. The left edge of the indication from the 1/4 T hole shall be positioned to 20% of the sweep length.
7 of 19 nr W o onc"" June 27, 1984
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W NSID DMW-ISI-147, Rev. O 1878W:42A/062084 Oi 5.1.2 Position the search unit to obtain the maximum response i
from the 3/4 T hole. The left edge of the hole shall be positioned to 60% of the sweep length.
5.1.3 The delay and range controls shall be adjusted until the 1/4 T and 3/4 T hole reflections start at 20% and 60% of the sweep length, respectively.
5.1.4 The search unit will then be positioned to obtain the maximum response from the square notch on the opposite surface. The indication will appear near 80% of the sweep length.
t 5.1. 5 When the above calibration has been completed, two divisions on the sweep will equal 1/4 T of the calibration block T and the full sweep range will equal 1 1/4 T.
(3 V
5.1. 6 When conditions require examination of a volume that exceeds 1 1/4 T (
5/8 node), sweep range and reflector positions specified in 5.1.1 thru 5.1.5 shall be altered as necessary to ensure that at least the volume required to be exanined is displayed on 100% of the sweep length.
l 5.2 Distance - anplitude correction (primary reference level) shall f
be established as follows:
l 5.2.1 Position the search unit to obtain the maximun response i
from the side drilled hole that produces the highest amplitude indication and the instrument sensitivity shall be set to produce an 80% full screen height signal from the hole. The sensitivity established in this step is referred to as the reference sensitivity.
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'd 5.2.2 With the search unit at this peaked signal location, the system vertical linearity will be re-verified by decreasing the instrument sensitivity by 6 dB, and then by i
an additional 6 dB. The resulting signal decrease shall be within 32% to 48% full screen height and 16% to 24%
full screen height respectively.
5.2.3 The examination system gain shall be returned to the reference sensitivity level and the peak indication amplitude will be determined from the remaining side-drilled holes at the 1/8,1/4, 3/8, and 5/8 r. ode locations. When it is not possible to obtain a meaningful signal at the 5/8 node location, the following alternate technique shall be used:
(a) The dB difference in amplitude between the 1/2 T and
(
3/4 T positions shall be determined.
(b) Decrease the 3/4 T calibrated reflector amplitude by 2 x the value determined in (a) and read the resulting anplitude of this signal to the nearest 1%
of full screen height.
(c) Mark the resulting amplitude in (b) at the appropriate sweep location that represents the 5/8 node location.
A distance-amplitude correction curve shall be constructed by connecting the peaked points on the screen to form a curved line.
5.2.4 The search unit shall then be positioned to obtain the peak amplitude from the notch on the opposite surface of the block and the location of the peak shall be marked on the instrument screen.
9 Of 19 l'y' "
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5.2.5 Reference points at 50% and 20% DAC of the distance-amplitude curve shall be established on the screen by i
decreasing each DAC curve reference point by 6 dB and then by an additional 8 dB. The resulting 50% cnd 20% DAC l
points shall be connected by curved lines drawn on the f
screen. To minimize screen clutter, a line connecting the 50% points may be omitted, provided the individual points are clearly visible. When investigating indications to t
the 50% DAC level, a line connecting applicable 50% DAC l
i reference points must be visualized or the reference l
sensitivity may be increased 6 dB and the 100% DAC curve may be used to represent the 50% DAC level, j
1 5.3 Data for determining transducer beam spread (scribe /ref. line data) l I
shall be obtained as follows:
l.
(a) Position the search unit to obtain a peaked indication from the qV 1/4 T hole. Measure the distance from the transducer exit f
point to the scribe line on the calibration block.
(b) Move the search unit toward the 1/4 T hole until the signal l
anplitude is 50% of the maximum amplitude. Measure the distance from the transducer exit point to the scribe line on the calibration block. Move the search unit toward the 1/4 T l
hole until the signal amplitude is 20% of the maximum j
amplitude. Measure the distance from the transducer exit point to the scribe line on the calibration block.
(c) Move the search unit away from the 1/4 T hole until the signal amplitude is again 50% of the maximum amplitude. Measure the distance from the transducer exit point to the scribe line on the calibration block. Move the search unit toward the 1/2 T hole until the signal amplitude is 20% of the maximum l
l A amplitude. Measure the distance from the transducer exit point i
l V to the scribe line on the calibration block,
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n' (d) Repeat steps (a), (b), and (c) for the 1/2 T and 3/4 T holes, i
t I
5.4 Documentation of data obtained during angle beam calibration shall be in accordance with DMW-ISI-101.
i 6.0 SYSTEM CALIBRATION VERIFICATION f
6.1 Calibration shall be performed prior to the use of the system in the thickness range to be examined. Calibration verification shall be performed on at least two of the basic calibration reflectors at the l
end of examinations for which they are applicable, or every 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> l
during the examination, whichever is less, and when Level II examination personnel are changed.
j 1
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i 6.2 If any point on the DAC curve has moved on the sweep ifne more than 10% of the sweep division reading, the sweep range calibration shall be corrected and the corrections shall be noted in the examination j
documentation.
If any recordable reflectors have been noted on data j
sheets after the previously acceptable sweep range calibration, the questionable data shall be voided, the new calibration shall be documented, and areas relative to the voided data shall be re-examined.
If any point on the DAC curve has decreased 20% or 2 dB of its 6.3 original amplitude, all data generated since the last calibration or calibration verification shall be marked void. A new calibration l
shall be performed and documented and the voided examination areas i
shall be reexamined.
If any point on the DAC curve has increased more than 20% or 2 dB of its original amplitude, all recordable indications noted since the last acceptable calibration or calibration veri ication shall be reexamined using the corrected f
i calibration data and their corrected recorded values shall be noted i
on the data sheets.
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W NSIO 1878W:42A/061884 l DMW-ISI-147, Rev. O i
7.0 STRAIGHT BEAM EXAMINATION FOR LAMINAR REFLECTORS (BASE METAL EXAMINATION) 7.1 Prior to the initial angle beam examination, the base metal through which the angle beams will travel shall be scanned with a straight j
beam search unit to detect laminar reflectors which might affect the j
interpretation of angle beam results and to detect laminar i
reflectors for acceptance. This examination is to be performed only during the preservice examination.
I f
7.2 Scanning for laminar reflectors shall be performed at a gain setting f
that gives an initial back surface reflection of nominally 80% of l
full screen height at an indication-free location of the component to be tested. The back reflection indication shall be positioned to 80% of the sweep length.
i i
7.3 Alternatively, straight beam examinations for laminar reflectors may be conducted as an extension of the straight beam examination for l
q V
planar reflectors (Ref. 4.0 and 8.5) if the planar reflector l
examination sensitivity is at least equal to that required in 7.2.
If laminar indications are detected by the alternate method, the i
indications shall be investigated at the sensitivity required in 7.2 and recorded in accordance with 7.5.
7.4 Areas containing laminar indications that causes either or both of the following shall be recorded:
4 (a) All areas where the indications are equal to or greater than
)
the remaining back reflection.
(b) All areas where one or more discontinuties produce a continuous total loss of back reflection accompanied by continuous l
i indications in the same plane.
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12 of 19
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7.5 The boundary of each area producing recordable laminar indications shall be recorded at increments not exceeding 1 inch. The plotting shall be such that a plan view showing the size, shape, and location I
of the area relative to the circumferential zero reference, weld i
}
centerline, and appropriate component surface is generated. The l
sweep location of indications which equal or exceed the criteria in f
7.4 shall be recorded along with an identification of the criteria l
(7.4a or 7.4b) that was exceeded.
l 7.6 Information recorded in 7.5 shall be used to determine if the lamination will interfere with the angle beam tests. An indication l
determined to be non-interfering shall be recorded as a GENERAL l
INDICATION.
Indications determined to be interfering shall be recorded as an EXAMINATION LIMITATION.
t 7.7 Where reflectors do interfere with angle beam examinations, the I
angle beam technique (including beam angle and sweep range) shall be G(N reviewed and modified to the extent practical to achieve at least the minimum required coverage of the volume required to be examined.
7.8 Documentation of data obtained during straight beam examinations for laminar reflectors shall be in accordance with DMW-ISI-101.
8.0 EXAMINATION OF VESSEL WELDS 8.1 Examinations shall be conducted at a gain setting at least two times
(+ 6 dB) the reference level. When this is not feasible, the cause or reason shall be documented.
8.2 The rate of search unit movement shall not exceed six inches per second.
8.3 Each pass or scan of the transducer shall overlap at least 107, of the transducer (piezoelectric element) dimension perpendicular to the direction of the scan, 13 of 19 un c'"' June 27, 1984 DAM oaf t pang NNit a 10 4 4 H e v 'Idi
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1878W:42A/061884 l DMW-ISI-147, Rev. 0 l
t pV 8.4 The temperature of the examination surface shall be detennined and related to the calibration block temperature. Record the temperature difference in terms of plus or minus degrees. The l
temperature difference between the calibration block and the surface i
of the item to be examined shall not exceed 25'F.
8.5 The volume of weld and adjacent base material that is to be examined l
shall be described in the Beaver Valley Unit 2 EPP. The volumes defined shall be scanned by straight and angle beam techniques. Two l
angle beams having nominal angles of 45 and 60 degrees with resocct l
to a line drawn perpendicular to the examination surface will normally be used. Other pairs of angles may be used as long as the j
measured difference between the angles is at least 10 degrees.
8.6 Scanning of the examination volume shall be performed from both I
sides of the weld on the same surface. Where component configuration or adjacent parts of the component are such that scanning from both sides of the weld is not feasible, such f
limitations shall be included in the report of the examination.
8.7 The examination volume shall be scanned with angle beam search units directed both at right angles to the weld axis and along the weld axis.
Each examination shall be performed in two directions, i.e.,
'l approaching the weld from opposite directions and parallel to the weld from opposite directions. Scanning directions shall be 3
identified by numbers as described in DMW-ISI-101.
8.8 The angle beam search units shall be aimed at right angles to the l
weld axis with the search unit manipulated so that the ultrasonic sound wave passes through all the weld metal when scanning for reflectors oriented parallel to the weld. The adjacent base metal need not be examined with both ar39 e beams from both directions.
1 Any combination of two angle beams will satisfy this requirement.
I4 Of l9
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8.9 When scanning for reflectors oriented transverse to longitudinal and circumferential welds, the search units shall be aimed parallel to the axis of the weld. The search unit shall be manipulated so that the ultrasonic sound wave passes through all the required j
exanination volume. Scanning shall be done in two directions 180 s
degrees to each other to the extent possible.
j 9.0 INTERPRETATION AND INVESTIGATION 9.1 The examiner shall interpret all indications that exceed 20". of the primary reference OAC such that he can assess their source and cause in terns of their being either valid or non-valid.
Indications or reflectors from or near the root of welds and clad surfaces may i
require other aids. See paragraph 9.3.
9.1.1 Valid indications are reflectors caused by flaws, such as cracks, lack of penetration or fusion, inclusions and porosity. All other indications are considered non-valid, including those due to: scanning noise, grain structure, beam redirection, internal liquid levels, clad interface, straight beam back surface and geometric reflectors.
9.2 Reflector indications that exceed 20% of primary reference DAC shall be investigated by the examiner, in tenns of the recording requirements of paragraph 10.0.
9.3 Other transducers, search units, frequencies, techniques, etc., may be used to aid interpretation and investigation.
9.3.1 If such aids necessitate use of any control that cannot be positively returned to its calibrated position, (such as a potentiometer control on sweep, damping, uncalibrated gain, etc.) primary reference calibration shall be verified before use and, re-established prior to continuing examinations.
15 of 19 "a mi o
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8 W:42A/061884 j OMW-ISI-147, Rev. 0 v
10.0 RECORDING INDICATIONS 10.1 Prior to recording reflector indications that require dimensioning, complete primary reference calibration, including linearity check shall be verified. Scribe /Ref. line data shall be verified.
10.2 Reflector indications which provide a response equal to or greater than 20% of the primary reference DAC and are at sweep locations representing the inner 25% of the component through-wall thickness measured from the inner surface shall be considered as--recordable indications and noted as RI.
I 10.2.1 For each such indication, peak amplitude, sweep position, search unit location and direction, beam angle, and measured thickness shall be recorded, i
l 10.2.2 Indications interpreted as non-valid need not be i
pd dimensioned, but shall be described with respect to the
{
I distance over which the indication is observed and the operators interpretation of the cause.
10.2.3 Indications interpreted as valid shall also be dimensioned to record, as a minimum, sweep positions and search unit locations representing minimum and maximum 50% DAC points, parallel and perpendicular to the length axis of the indication and sweep positions and search unit locations representing minimum and maximum 20% DAC points, parallel and perpendicular to the length axis of the indication.
For indications that exceed DAC, the minimum and maximum 100% points shall also be noted.
10.3 Reflector indications which provide a response equal to or greater than 50% of primary reference DAC and are at sweep locations representing 25% and greater of the component through-wall thickness measured from the inner surface, shall be considered as--recordable indication--and noted as RI.
16 of 19 "w i o smum June 27, 1984 n,,,
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.hW NSID 1878W:42A/061884 DMW-ISI-147, Rev. 0 U
10.3.1 For each such indication; peak amplitude, sweep position, search unit location and direction, beam angle, and measured thickness shall be recorded, i
10.3.2 Indications interpreted as non-valid need not be l
dimensioned, but shall be described with respect to the distance over which the indication is observed and the operators interpretation of the cause.
10.3.3 Indications interpreted as valid shall also be dimensioned to record, as a minimum, sweep positions and search unit locations representing minimum and maximum 50% DAC points, parallel and perpendicular to the length axis of the indication. For indications that exceed DAC, the minimum and maximum 100% pointe shall also be noted.
10.4 Valid reflector indications which provide a response between 20% and 50% of primary reference DAC and are at sweep positions representing 25% and greater of the component through-wall thickness measured from the inner surface shall be considered as--non-recordable indication--and noted as NRI.
10.4.1 For preservice examination only, each such indication shall be noted on an RI data sheet.
As a minimum, peak amplitude, sweep position, search unit location and direction, beam angle, and measured thickness shall be noted.
10.5 The absence of valid indications shall be considered as--no indication--and noted as NI.
11.0 POST CLEANING 11.1 Examined areas shall be dry-wiped to remove excess wet couplant.
17 Of 19
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12.0 EXAMINATION RESULTS AND DOCUMENTATION 12.1 All data relative to examinations shall be recorded in accordance with DMW-ISI-101.
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, DMW-ISI-147, Rev. 0 1878W:42A/061884 (m
ILLUSTRATIVE ONLY l
1 WESTINGHOU$t NUCLEAR $tRVICES INTEGRATION CIVISION l
TRAN50VCER RF WAvtFORM DATA $ MEET IITILITY PLANT POST INSPECTION
] Pet.!Ni/ECTION TeAN$00CER DATA Manufacturer Style Frequency Active flewat Diiienston Connector Type g
i Focal Type I
Serial Necer I
tt37 OATA pm
'(J)
Target Watercatn Refracted Angle Put$ tere [Ct!Vte CATA M04tt0e 05C!tte!: tot Man facturer Manufacturer u
Mooel m eter Mooel meter i
Serial Nener
$ertal m eeer Recetwer Gain Vertical Scale
'd'v.
I l
Receiver Atten etton Morizontal Scale utec e'v, w
Filter Calibretton Date Damoing Calteratton volte Untti Repetition Rat.
Energy Perfor'neo by Frequency Date I
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TRANS0VCER RF WAVEFORM DATA SHEET FIGURE 1 g
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.6 PROCE DUAE NUV8E R O
-Q Nuclear INSPECTION SERVICES I
W, Services integration DMW-ISI-47, Rev. 0 DIVISION NONDESTRUCTIVE EXAMINATION PROCEDURE TITLE MANUAL ULTRASONIC EXAMINATION OF WELDS IN VESSELS O
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PREPARED BY:
_ /.
B. Jf gefe'bvre (v
APPROVED B.
D. c. Adamonis, Manager Inspection Service
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June 13, 1984
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MANUAL ULTRASONIC EXAMIHATION OF WELDS IN VESSELS 1.0 SCOPE l
1.1 This procedure defines requirements for manual ultrasonic j
examination of full penetration longitudinal and circumferential pressure retaining welds in ferritic vessel material (wrought or i
-cast) greater than 2 inches thick.
^
1.2 This procedure satisfies the requirements of the 1980 Edition of Section XI of the ASME Boiler and Pressure Vessel Code with addenda through the Winter,1980. Technical contents are based on the ASME l
Code, including Section XI, IWA-2240, when dictated due to Code l
l omissions and to implement upgraded technology or good practice.
1.3 Procedure DMW-ISI-101, "Preservice and Inservice Examination h)
Documentation"; Procedure DMW-ISI-10. " Qualification of Ultrasonic Manual Equipment"; and the Beaver Valley Unit 2 Examination Program Plan (EPP) are considered part of this procedure. The specific scope of the examinations that are to be performed on all welds l
and/or areas of systems and components shall be defined in the Beaver Valley Unit 2 EPP.
3 l
l 2.0 GENERAL REQUIREMENTS I
t i
2.1 Personnel performing examinations per this procedure shall be i
certified to at least Level II for ultrasonic examinations in accordance with Westinghouse procedure PA 10.1 hod l
equivalent procedures based on SNT-TC-1 A as modified by requirements l
in the 1980 Edition of Section XI of the ASME Boiler and Pressure i
Vessel Code with Addenda through the Winter,1980. Personnel
(
certified as any NDE level for ultrasonic examinations may be l
i f
employed as assistants.
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U 2.2 Ultrasonic flaw detection instruments shall be of the pulse echo type with an A-scan presentation and shall be qualified to the requirements of DMW-ISI-10 at the beginning of each period of extended use. Qualifications may be valid for a period not to exceed three months.
i i
2.3 Piezoelectric transducers shall have a maximum surface area of one F
square inch. The nominal frequency shall be 2.25 MHz.
The transducers shall be capable of producing satisfactory calibrations at nominal refracted beam angles of 0* (longitudinal wave) and 45*
1 and 60* (transverse wave). Other transducers may be used for i
supplemental investigations and where metallurgical characteristics preclude use of the transducers specified above.
If it is necessary to change either or both the 45* and 60* angles, two other angles shall be used. The angular difference between the two angles shall be at least 10*.
The maximum refracted angle shall not exceed 70*.
2.4 The couplant used during the examinations shall be a suitable liquid, sent-liquid, or paste, such as Echogel, Exosen, Sonotrace, Trim, Ultragel, or glycerine. The couplant shall contain no more than 1% by weight of residual sulphur and halogens.
l 1
2.5 The item to be examined, including the required extent of adjacent I
i volume to be examined, shall be defined in the Beaver Valley Unit 2 j
EPP. This information shall be provided to the examiner assigned to conduct the examination. The required volume shall be examined to the maximum extent practical. The extent of the required volume f,
that cannot be examined during the preservice examination shall be noted in the report of recorded examination in accordance with DMW-ISI-101.
2.6 The transducer scan surfaces, including the weld crown, shall be essentially free of dirt, spatter, paint, coatings and j
l l
Ri v$f D teFECtWE 2 of 16 o,n oatt June 13,1984 rac.t u.,,o w us v n e >
NSID 1878W:42A/060184 DMW-ISI-47, Rev. O r~b irregularities that would impair the smooth, uninterrupt contact of the search unit with the entry surface or the effective coupling of the sound beam into the material being examined.
i i
l 2.6.1 The preparation of examination surfaces along with examination area access support (e.g., scaffolds, lighting, etc.) when requested by the examiner, shall be the responsibility of the utility.
i 2.7 Each pass or scan of the transducer shall overlap at least 10% of the transducer (piezoelectric element) dimension perpendicular to f
f l
the direction of scan, 2.8 The rate of search unit movement shall not exceed six inches per
[
second.
2.9 Scanning shall be performed at a gain setting at least two times
(+ 6 dB) the reference level. When this is not feasible, the cause or reason shall be documented.
t 2.10 The basic calibration block containing the basic calibration reflectors used to establish a primary reference response of the examination system and to construct a distance-amplitude correction curve shall satisfy the requirements of the 1980 Edition of the
~ASME Boiler and Pressure Vessel Code with addenda through the Winter of 1980. Calibration blocks and a listing of the weld or groups of welds for which they are individually applicable shall be 3
I identified in the EPP.
f 3.0 SYSTEM CALIBRATION-6ENERAL REOUIREMENTS 3.1 Prior to performing examinations, the complete examination system shall be calibrated on the applicable calibration block (s) for the l
examinations to be performed. The examination system is defined as i
I i
i Af v:sf D I
EHECinE 3 of 16 nan D^'t June 13.1984 nact Pe%IO 10] 4 H( V 7l$J
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v the ultrasonic instrument (and battery pack, if applicable);
cable (s); transducer (s); couplant; any other apparatus, instrument, or circuit employed between the instrument and the calibration block surface.
Once calibration has been established, any change to any part of the examination systen will require verification of the original calibration. See paragraphs 6.2 and 6.3.
I 3.2 The centerline of search units shall be at least 1-1/2 inches from l
I the nearest side of the block when calibrating on standard reference blocks.
The front of the search unit shall be oriented approximately parallel to the major axis of the reference reflector (sound beam perpendicular to major axis of reflector). The sound beam shall not be directed into the corner formed by the hole and the side of the block. Staggered holes shall be utilized for i
straight beam calibration and in-line holes for angle beam i
calibration.
pG 3.3 The temperature difference between the surface of the calibration block and the surface of the item to be examined shall not exceed l
l 25v.
l 3.4 Each calibration shall be performed from the surface (clad or f
I unclad) corresponding to the surface of the component from which the examination will be performed.
3.5 The ultrasonic instrument shall provide linear vertical presentation within + 5% of the full screen height for at least 80% of the calibrated screen height (base line to maximum calibrated screen point (s)). The instrument screen height /linearity shall be verified per DMW-ISI-10. See paragraph 2.2.
l l
3.6 The ultrasonic instrument shall utilize an amplitude control, accurate over its useful. range to + 20% of the nominal amplitude (h
ratio, to allow measurement of indications beyond the linear range i
i 1
Rf vs 0 l
l E H E Clivt 4 of 16 nm Datt June 13.1984 pact N%.D 8014 64L V 2383
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NSID 1878W:42 A/060184 DMW-ISI-47, Rev. 0
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V of the vertical display on the screen. The instrument amplitude f
control linearity shall be verified per DMW-ISI-10. See j
l I
paragraph 2.2.
(
3.7. Any controls which affect the instrument linearity (e.g ; reject, or clipping) shall be in the off or minimum position for linearity
[
checks, calibrations, and examinations. Once adjustment of filters is established during system calibration, they shall remain fixed I
for the period of the examinations for which the calibration is t
applicable.
3.8 Documentation of general calibration data shall be in accordance wi th DMW-ISI-101.
I 4.0 STRAIGHT BEAft CALIBRATI0lJ 4.1 Sweep range shall be calibrated to provide linear spacing of the appropriate reflectors:
4.1.1 Position the search unit to obtain the maximun response from the 1/4 T side-drilled hole. Position the lef t edge of the 1/4 T hole indication to 20% of the sweep length.
4.1.2 Position the search unit to obtain the maximum response from the 3/4 T hole. Position the left edge of the 3/4 T hole indication to 60% of the sweep length.
4.1.3 The delay and range controls shall be adjusted until the indication from the 1/4 T hole starts at 20% of the sweep length and the indication from the 3/4 T hole starts at 60%
of the sweep length.
4.2 The distance-amplitude correction (DAC) curve shall be established p
in the following manner:
i
- Denotes where IWA-2240 is involked as referenced in 1.2.
kr s'st D E s F( Clist 5 of 16 n.,i D^'t Junej 3.1984 ract wo ioi4 ai v.' i s i
h NSID 1878W:42A/060184 DMW-ISI-47, Rev. O f
C 4.2.1 Position the search unit to obtain the maximum response from the calibration hole that produces the highest amplitude signal.
1 I
4.2.2 Adjust the instrument sensitivity to obtain an 80% full l
screen height indication from the hole.
The location of the peak amplitude of the indication shall be marked on the j
screen of the test instrument. The sensitivity established in this step shall be referred to as the reference j
sensitivity.
i 4.2.3 With the search unit at this peaked signal location, the system vertical linearity will be re-verified by decreasing f
I the instrument sensitivity by 6 dB, and then by an additional 6 dB. The resulting signal decreases shall be within 32% to 48% full screen height and 16% to 24% full
'{}
screen height, respectively.
4.2.4 Position the search unit to obtain the maximum response from
)
another calibration hole and the peak indication location
{
l shall be marked on the instrument screen, j
4.2.5 Position the search unit to obtain the maximum response from the third calibration hole and the peak indication location shall be marked on the instrument screen.
4.2.6 The three marked points on the instrument screen shall be j
connected by a smooth curve which is extended through the full thickness to be examined to form the distance-amplitude correction curve.
l I
,R i
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l 4.3 Documentation of data obtained during straight beam calibration shall be in accordance with DMW-!SI-101.
i
[
5.0 ANGLE BEAM CALIBRATION j
i 5.1 Sweep range shall be calibrated to allow display of the maximum
{
j thickness required to be examined within 80% of the sweep length.
The sweep shall be calibrated as follows to provide Ifnear spacing j
of the appropriate reflectors.
5.1.1 Position the search unit for the maximum response from the l
f 1/4 T side-drilled hole in the applicable calibration block. The lef t edge of the indication from the 1/4 T hole shall be positioned to 20% of the sweep length, t
5.1.2 Position the search unit to obtain the maximum response from 7V the 3/4 T hole.
The lef t edge of the hole shall be positioned to 60% of the sweep length.
5.1. 3 The delay and range controls shall be adjusted until the 1/4 T and 3/4 T hole reflections start at 20% and 60% of the l
sweep length, respectively.
5.1.4 The search unit will then be positioned to obtain the maximum response from the square notch en the opposite surface.
The indication will appear near 80% of the sweep length.
5.1.5 When the above calibration has been completed, two divisions on the sweep will equal 1/4 T of the calibration block i and the full sweep range will equal 11/4 T.
5.1.6 When test conditions require examination of a volume that b~
exceeds 11/4 T ( 5/8 node), sweep range and reflector i
7 of 16 ci.n 0*"
June 13_,_1984_ _ - ___ rara unioiniv ii.i
h NSID 1878W:42A/060184 DMW-IS!-47, Rev. 0
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V positions specified in 4.1.1 thru 4.1.5 shall be altered as necessary to ensure that at least the volume required to be examined is displayed on 100% of the sweep length.
l 5.2 Distance - amplitude correction (primary reference level) shall l
be established as follows:
5.2.1 Position the search unit to obtain the maximum response from the side drilled hole that produces the highest amplitude indication and the instrument sensitivity shall be set to produce an 80% full screen height signal from the hole.
The sensitivity established in this step shall be referred to as the reference sensitivity.
l I
I 5.2.2 With the search unit at this peaked signal location, the system vertical linearity will be re-verified by decreasing h
the instrument sensitivity by 6 dB, and then by an additional 6 dB. The resulting signal decrease shall oe within 32% to 48% full screen height and 16% to 24% full l
screen height respectively.
I 5.2.3 The examination system gain shall be returned to the l
reference sensitivity level and the peak indication l
amplitude will be determined from the remaining side-drilled i
i holes at the 1/8,1/4, 3/8, and 5/8 node locations. When it is not possible to obtain a meaningful signal at the S/8 node location, the following alternate technique shall be I
used:
(a) The dB difference in amplitude between the 1/2 T and 3/4 l
T positions shall be determined.
(b) Decrease the 3/4 T calibrated reflector amplitude by 2 x the value determined in (a) and read the resulting
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1
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j ne est n inicini 8 of 16
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. t3 j
amplitude of this signal to the nearest 1% of full screen height.
(c) Mark the resulting amplitude in (b) at the appropriate sweep location that represents the 5/8 node location.
i A distance-amplitude correction curve shall be constructed by connecting the peaked points on the screen to form a f
curved line.
5.2.4 The search unit shall then be positioned to obtain the peak amplitude from the notch on the opposite surface of the block and the location of the peak shall be marked on the ins'trurr. crit screen.
l I
5.2.5 Reference points at 50% and 20% DAC of the distance-A(/
amplitude curve shall be established on the screen by decreasing each DAC curve reference point by 6 dB and then by an additional 8 dB.
The resulting 50% and 20% DAC points shall be connected by curved lines drawn on the screen. To minimize screen clutter, a line connecting the 50% points may be omitted, provided the individual points are clearly r
visible. When investigating indications to the 50% DAC level, a line connecting applicable 50% DAC reference points must be visualized or the reference sensitivity may be increased 6 dB and the 100% DAC curve may be used to l
represent the 50% DAC level.
}
l 5.3 Data for determining transducer beam spread (scribe /ref. line data) f shall be obtained as follows:
(a) Position the search unit to obtain a peaked indication from the 1/4 T hole. Measure the distance from the transducer exit l
(h point to the scribe line on the calibration block.
Q I
64 us[ D i
E 8 FE CTivt 9 of 16 out i
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"3 1078W:42A/0fiOl84 DMW-ISI-47, Rev. 0 l
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l
~
x v"
. (b) l Move the search unit toward the 1/4 T hole until the signal
/
l X
t s
f b >~
"J atiplitude is one-hal f the maximum amplitude. Measure the s
a distance from the transducer exit point to the scribe line on I
i i
s o
t
.~.
,s._
s I
N
..the calibration block.
1,
~
U s-
.(c)# Move'the search unit away from the 1/4 T hole until the s gnal i
s D
. amplitude is again one half the maximum amplitude. Measure the s..~
I i
d(stance from the transducer exit point to the scribe line on p#
7 u
s the calibration block.
'n s
j.
s.
~.
-(d)' Repeat steps (a), (b), and (c) for the 1/2 T and 3/4 T holes, N
i
..; <,9
. _ _ ~.,
,o 5.4 Documentat' ion of data obtained during angle beam calibration shall
.. g
+
be in. accordance with DMW-ISI-101.
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'OO~ SYSTEM CALINR TION VENIFICATI.ON o
l y m(>
s
~~
' \\_,f D 6.-l'. Calibration shall be performed prior to the use of the system in the
'fiJ s
^ ~
thickness range to be examined. Calibration verification shall be
. s ~ m, formed on at least two of the basic calibration reflectors at the s
Nw y 'g s.
s.
per N
b Jls-end of examinations for which they are applicable, or every 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> l
1
~
k' M ' Jduring the examination, whichever is less, ano when Level II l
mA examinationJpersonnel ar~e changed.
W
(
Ci%y w a,
dA N "*
1, 6.h 'If any point'or. the DAC curve has moved on the sweep line more than q.
-x w S - 10%.of the sweep division reading, the sweep range calibration shall s
i,.,.a J
.t
. beTricrected and the. corrections shall be noted in the examination r
vs
^; :x f'?
q' x
s s
documentation.
If a,ny recordable reflectors have been noted on data A
e'
's P.
~
- hesG',af ter-the previously acceptable sweep range calibration, the s
_ uestfor.able data shall be voided, the new calibration shall be q
. docu:".ented, and areas relative to the voided data shall be i
I 2..
r
') & N.
re-examine';
d q
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June 13,1984-P. A C.(
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NSID 1878W:42A/060184 DMW-ISI-47, Rev. O f
6.3 If any point on the DAC curve has decreased 20% or 2 dB of its original amplitude, all data generated since the last calibration or calibration verification shall be marked void. A new calibration l
shall be performed and documented and the voided examination areas l
t shall. be reexamined.
If any point on the DAC curve has increased 1
more than 20% or 2 dB of its original amplitude, all recordable j
j indications noted since the last acceptable calibration or f
calibration verification shall be reexamineti using the corrected l
j calibration data and their corrected recorded values shall be noted l
on the data sheet;.
i I
7.0 STRAIGHT BEAM EXAMINATIO!! FOR LAMINAR REFLECTORS (BASE METAL EXAtlINATI0ll) i 7.1 Prior to the initial angl"e beam examination, the base metal through which the angle beams will travel shall be scanned with a straight l
beam search unit to detect laminar reflectors which might affect the interpretation of angle beam results and to detect laminar reflectors for acceptance. This examination is to be performed only during the preservice examination.
l L
7.2 Scanning for laminar reflectors shall be performed at a gain setting j
that gives an initial back surface reflection of nominally 80% of l
1' full screen height at an indication-free location of the component to be tested. The back reflection indication shall be positioned to 80% of the sweep length.
7.3 Alternatively, straight beam examinations for laminar reflectors may be conducted as an extension of the straight beam examination for planar reflectors (Ref. 4.0 and 8.5) if the planar reflector i
examination sensitivity is at least equal to that required in 7.2.
l If laminar indications are detected by the alternate method, the indications shall be investigated at the sensitivity required in 7.2 f
l i
and recorded in accordance with 7.5.
l i
l E
E H E Cityt su ust e l
11 of 16 nay Datt June 13.1984 nac.r t
t MsD 1014 H e v.'s a 3
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NSID 1878W:42A/060184 DMW-ISI-47, Rev. 0 l
l G
l b
7.4 Areas containing laminar indications that causes either or both of l
I the following shall be recorded:
(a) All areas where the indications are equal to or greater than the remaining back reflection.
l' j
(b) All areas where one or more discontinuties produce a continuous
[
total loss of back reflection accompanied by continuous l
indications in the same plane.
7.5 The boundary of each area producing recordable laminar indications i
r shall be recorded at increments not exceeding 1 inch.
The plotting j
shall be such that a plan view showing the size, shape, and location of the area relative to the circumferential zero reference, weld t
centerline, and appropriate component surface is generated. The i
sweep location of indications which equal or exceed the criteria in 7.4 shall be recorded along witn an identification of the criteria (7.4a or 7.4b) that was exceeded, j
7.6 Information recorded in 7.5 shall be used to determine if the lamination will interfere with the angle bean tests. An indication I
l 1
i determined to be non-interfering shall be recorded as a GENERAL l
t i
INDICATION.
Indications determined to be interfering shall be l
recorded as an EXAMINATION LIMITATION.
l I
7.7 Where reflectors do interfere with angle beam er.aminations, the l
angle beam technique (including beam angle and sweep range) shall be reviewed and modified to the extent practical to achieve at least the minimum required coverage of the volume required to be examined.
(
l 7.8 Documentation of data obtained during straight beam examinations for l
laminar reflectors shall be in accordance with DMW-ISI-101.
l i
Ah f
I l
HI v!SE D l
'E f f tCTM 12 of 16 n,n D^"
June 13,1984 c,c.t N%tD 1014 H E V. ? I 8 3
i W NSID 1878W:42A/060184 DMW-ISI-47, Rev. O I
8.0 EXAMIllAT10tl 0F YESSEL WELDS 8.1 Examinations shall be conducted at a gain setting at least two times l
l t
(+ 6 dB) the reference level. When this is not feasible, the cause I
i or reason shall be documented.
i 1
i 8.2 The rate of search unit movement shall not exceed six inches per I
second.
8.3 Each pass or scan of the transducer shall overlap at least 10% of f
the transducer (piezoelectric element) dimension perpendicular to l
[
the direction of the scan.
l I
8.4 The temperature of the examination surface shall be determined and related to the calibration block temperature. Record the temperature difference in terms of plus or minus degrees. The I
temperature difference between the calibration block and the surface of the item to be examined shall not exceed 25'F.
[
i t
I 8.5 The volume of weld and adjacent base material that is to be examined l
shall be described in the Beaver Valley Unit 2 EPP. The volumes l
l l
f
[
defined shall be scanned by straight and angle beam techniques.
Two angle beams having nominal angles of 45 and 60 degrees with respect l.
to a line drawn perpendicular to the examination surface will l
l h
normally be used. Other pairs of angles may be used as long as the measured difference between the angles is at least 10 degrees.
i l
i 8.6 Scanning of the examination volume shall be performed from both sides of the weld on the same surface. Where component i
configuration or adjacent parts of the component are such that t
scanning from both sides of the weld is not feasible, such limitations shall be included in the report of the examination.
I I
I r
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l M vH D EHECfWE 13 of 16 n,n U^'t Jtfne 13.1984 caca N%ID 1014 Hi V
.t l e ?.
h NSID 1878W:42A/060184 DMW-ISI-47, Rev. 0 I
8.7 The examination volume shall be scanned with angle beam search units directed both at right angles to the weld axis and along the weld axis. Each examination shall be performed in two directions, i.e.,
approaching the weld from opposite directions and parallel to the weld from opposite directions.
Scanning directions shall be identified by numbers as described in DMW-ISI-101.
i 8.8 The angle beam search units shall be aimed at right angles to the i
weld axis with the search unit manipulated so that the ultrasonic f
sound wave passes through all the weld metal when scanning for reflectors oriented parallel to the weld.
The adjacent base metal l
need not be examined with both angle beams from both directions.
1 Any combination of two angle beams will satisfy this requirement.
P 8.9 When scanning for reflectors oriented transverse to longitudinal and circumferential welds, the search units shall be aimed parallel to O()
the axis of the weld. The search unit shall be manipulated so that the ultrasonic sound wave passes through all the required examination volume. Scanning shall be done in two directions 180 degrees to each other to the extent possible.
l i
9.0 IHTERPRETATION AND INVESTIGATION 9.1 The examiner shall interpret all indications that exceed 20% of the l
primary reference DAC such that he can assess their source and cause in terms of their being either valid or non-valid.
Indications or I
reflectors from or near the root of welds and clad surfaces may i
require other aids.
See paragraph 9.3.
9.1.1 Valid indications are reflectors caused by flaws, such as cracks, lack of penetration or fusion, inclusions and j
porosi ty.
A*i1 other indications are considered non-valid, l
l including those due to:
scanning noise, grain structure, i
O l
l l
l
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ne vist o
(i I
L i
1 APPROVED _v-D. C. Adamonis, Manager l
Inspection Service L
O i
l
//,C * '
June 13, 1984
"'Ji""
o
NSID 1978W:42A/060784 DMW-ISI-206 Rev. O A
f U
MANUAL ULTRASONIC EXAMINATION OF WELDS i
i t
1.0 SCOPE i
1.1 This procedure defines requirements for manual ultrasonic l
examination of full penetration circumferential and longitudinal butt welds, and adjacent base materials of these and fillet or '
t i
corner welds.
It is applicable to such welds in piping systems
(.25" to 6" thick) and vessel materials (.25 to 2" thick), in ferritic or austenitic steels of either wrought or cast product l
- forms, i
r 1.2 This procedure satisfies the requirements of the 1980 Edition of I
Section XI of the ASME Boiler and Pressure Vessel Code with addenda j
through the Winter,1980.
v Technical contents are based on the ASME Code, including Section XI, l
IWA-2240, when dictated due to Code omissions and to implement upgraded technology or good practice.
1.3 Procedure DMW-ISI-101, "Preservice and Inservice Examination Documentation"; Procedure DMW-ISI-10, " Qualification of Ultrasonic Manual Equipment"; and the Beaver Valley Unit 2 Examination Program Plan (EPP) are considered part of this procedure. The specific t
scope of the examinations that are to be performed on all welds and/or areas of systems and components shall be defined in the Beaver Valley Unit 2 EPP.
i l
t h
l Q
i i
Af vist 0
( S F E Cin,t naci 1 of 24 0^"
0'"
June 13.1984 M'O 1084 HIv ?ISJ
i i
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j h NSIO 1978W:42A/060784 DMW-ISI-206 Rev. O t
l
.t f
2 V 2.0 _ GENERAL REQUIREMENTS i
1 l
2.1 Personnel performing examinations per this procedure shall be l
l certified to at least Level 11 for ultrasonic examinations in f
f accordance with Westinghouse procedure PA 10.1 or approved equivalent procedures based on SNT-TC-1 A as modified by requirements in the 1980 Edition of Section XI of the ASME Boiler and Pressure l
Vessel Code with Addenda through the Winter,1980. Personnel l
c
\\
l certified at any NDE Level for ultrasonic examinations may be employed as assistants.
r i
f 2.2 Ultrasonic flaw detection instruments shall be of the pulse echo type with an A-Scan presentation and shall be qualified to the requirements of DMW-ISI-10 at the beginning of each period of extended use. Qualifications may be valid for a period not to l
exceed three months.
7 O
Piezoelectric transducers shall be in accordance with TABLE 1 and i
2.3 i
shall be capable of providing the applicable calibration as required l
herein.
i 2.4 The couplant used during the examinations shall be a suitable f
r liquid, semi-liquid, or paste, such as Echogel, Exosen, Sonotrace, j
j j
Trim, Ul tragel, or glycerine. The couplant shall contain no more l
i l
than 17, by weight of residual sulphur and halogens.
t l
2.5 The item to be examined, including the required extent of adjacent volume to be examined, shall be defined in the Beaver Valley Unit 2
[
EPP. This information shall be provided to the examiner assigned to l
i o
conduct the examination.
The required volume shall be examined to j
the maximum extent practical. The extent of the required volume f
that cannot be examined during the preservice examination shall be l
noted in the report of recorded examination in accordance with f
I DMW-ISI-101.
I i
RFV6(D E 8 F E C fivt 2 of 24
- 0^tt f
o*'t June 13.1984 ncor i
I Pt%iD 1014 84t v 218 )
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~-
h NSID l
1978W:42A/060784 DMW-ISI-206 Rev. 0
^
V 2.6 The transducer scan surfaces, including the weld crown, shall be l
essentially free of dirt, spatter, paint, coatings and irregularities that impair smooth, uninterrupted contact of the search unit with the entry surface or the effective coupling of the sound beam into the material being examined.
I 2.6.1 The preparation of examination surfaces along with examination area access support (e.g., scaffolds, lighting, etc.) when requested by the examiner, shall be the responsibility of the utility.
2.7 Each pass or scan of the transducer shall overlap at least 10% of f
the transducer (piezot:lectric element) dimension perpendicular to the direction of scan.
t i
2.8 The rate of search unit movement shall not exceed six inches per second.
p U
2.9 Scanning shall be performed at a gain setting at least two times 1
(+ 6 dB) the reference level. When this is not feasible, the cause I
or reason shall be documented.
2.10 Generally the examinations conducted in accordance with this procedure will be done from the 0.D. surface. When examinations are i
I to be conducted from an I.D. surface, calibration must be l
accomplished on the I.D. of the appropriate calibration block and j
noted on the report.
l l
l I
I O
I i
ni vst D f UtCf tvt D^'t June 13.1984 nact 3 of 24 D'"
N%eO 8014 Nt V JjS3
h NSID DMW-ISI-206 Rev. 0 1978W:42A/060784
/
\\
2.11 The basic calibration block containing the basic calibration
\\d reflectors used to establish a primary reference response of the examination system and to construct a distance-amplitude correction curve shall satisfy the requirements of the 1980 Edition of the ASME Boiler and Pressure Vessel Code with addenda through the Winter of 1980.
Calibration blocks and a listing of the weld or groups of welds for which they are individually applicable shall be identified l
in the EPP.
3.0 SYSTEM CALIBRATION - GENERAL REQUIREMENTS 3.1 Prior to performing examinations, the complete examination system l
I shall be calibrated on the applicable callDration block (s) for the examinations to be performed. The examination system is defined as l
the ultrasonic instrument (and battery pack, if applicable);
cable (s); transducer (s); couplant; any other apparatus, instrument, or circuit employed between the instrument and the calibration block p"
Once calibration has been established, any change to any surface.
part of the examination system will require verification of the original calibration. See paragraphs 6.2 and 6.3.
l I
3.2 The beam of the search unit shall be oriented essentially perpendicular to and directed at the mid-point area of the major axis of calibration reflectors. The calibration reflector indications shall not be improved by reflecting the beam off the edge of the block.
3.3 The temperature difference between the surface of the calibration block and the surface of the item to be examined shall not exceed 25*F.
I 3.4 Each calibration shall be performed from the surface (clad or unclad) corresponding to the surface of the component from which the examination will be performed.
84f uH D t5ttC1WE 4 of 24 m 't M't June 13,1984
,. a u N901014 HI V ?Iel
v h NSID 1978W:42A/060784 DMW-ISI-206 Rev. 0 O
3.5 The ultrasonic instrument shall provide linear vertical presentation f
within +5% of the full screen height for at least 80% of the calibrated screen height (base line to maximum calibrated screen point (s)). The instrument screen height /linearity shall be qualified per DMW-ISI-10. See paragraph 2.2.
3.6 The ultrasonic instrument shall utilize an amplitude control, accurate over its useful range to f_20% of the nominal amplitude ratio, to allow measurement of indications beyond the linear range of the vertical display on the screen. The instrument amplitude control linearity shall be qualified per DMW-ISI-10.
See paragraph 2.2.
3.7 Sweep range for angle beam calibration shall be sufficiently long so as to allow examination of the entire required volume by a:
full
" vee path" from one side of the weld; half " vee path" from each side p
of the weld; or a combination of such coverage so that the entire volume required to be examined is covered by at least 2 sound beam directions. See Figures 1 thru 4.
3.7.1 A " vee path" is composed of a downward and an upward path or leg of the calibrated sound beam in the material through l
which it is traveling.
l
}
A 1/2 vee path is either a downward or an upward leg.
f Example:
for 11/2 V (or 3T) calibration where the volume required to be completely covered by the first 1/2 Y from one side and by the last (3rd 1/2 V) from the opposite side,1/2 Vee path coverage from both sides has been satis'fied.
A1 1/2 V is composed of 3 half vees and 2 full vees, one of which is inverted.
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V 3.7.2 Sweep shall be calibrated to provide equally spaced increments of the appropriate reference reflectors.
Table 2 specifies specific sweep limitations.
I
- 3.8 Reference sensitivity shall be established from notch reflectors except, for vessels, castings,1/2 node techniques, l
and for austenitic materials greater than 1.7 inches thick, f
drilled holes may be used. For primary loop reactor coolant piping, sensitivity shall be established from the 3/4 T hole.
For pressure boundary base metal adjacent to and underneath integrally welded supports, sensitivity shall be established on an 0.D. notch or on holes representing an up-leg.
l 3.9 Documentation of general calibration data shall be in accordance with DMW-151-101.
I 4.0 STRAIGHT BEAM CALIBRATION 4.1 When calibration blocks containing 1/4 T and 3/4 T holes are used, the sweep range shall be calibrated to provide linear time / distance I
reference.
I 4.1.1. Position the search unit to obtain the maximum response from the 1/4 T drilled hole. Position the lef t edge of the 1/4 T j
hole indication to 15% of the sweep length.
t 4.1.2. Position the search unit to obtain the maximum response from tne 3/4 T hole. Position the left edge of the 3/4 T hole i
indication to 45% of the sweep length.
4.1.3. The delay and range controls shall be adjusted until the indication from the 1/4 T hole starts at 15% of the sweep length and the indication from the 3/4 7 hole starts at 45%
l; O
of the sweep length.
I V
- Indicates whereh 2240 in invoked as referenced in 1.2
{
1 LWA ne vt. o lef t Clivt eau 6 of 24 ca'r D*'8 June _1_3.,1984 Win 10 6 4 6*f 4 78al
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4.2 When calibration blocks contain a 1/2 T hole only, the sweep range i
shall be calibrated to provide a linear time / distance reference.
l 4.2.1 Adjust the sweep rate and range controls so as to position the back surface signal from the block to 50% of full sweep length and the first multiple of the back surface to 100% of sweep.
4.3 The distance-amplitude correction (DAC) curve and vertical linearity shall be accomplished in the following manner:
4.3.1 Position the search unit to obtain the maximum response from the calibration hole that produces the highest amp,litude and adjust this signal to 80% full screen height (FSH).
[
l i
4.3.2 Without moving the search unit from this peaked signal location point, check vertical linearity of the system by decreasing signal amplitude 6dB, and then by an additional 6dB. The resulting signal decrease must be within 32% to 48%
FSH and 16% to 24% respectively.
f l
I 4.3.3 If either signal falls outside of its range, such controls as l
I reject, clipping, damping, filtering, etc., shall be adjusted such that this check can be accomplished satisfactorily.
If l
l adjustment of controls fails to provide a satisfactory check, the transducer and/or cable shall be changed and calibration repeated.
If the system continues to fall outside of the acceptable range, the instrument shall be changed. Once adjustrwnt of controls that affect linearity is established, they shall remain fixed for the period of the examinations.
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4.3.4 Maintain the search unit position and return the signal j
amplitude to 80% FSH as required in 4.3.1.
The location of I
the peak amplitude of this indication shall be marked on the l
screen of the instrument. The sensitivity established in this step is referred to as the reference sensitivity. When a 1/2 T hole only is provided, a DAC is not required and further screen markings are not required.
4.3.5 Position the search unit to obtain the maximum response from I
each of the other calibration holes, if applicable, and mark their peak indications location on the instrument screen.
4.3.6 The points marked on the instrument screen shall be connected l
by a smooth curve which is extended through the full thickness to be examined to form the distance-amplitude l
correction curve.
j
{}
4.4 Documentation of data obtained during straight beam calibration shall be in accordance with DMW-ISI-101.
i 5.0 ANGt.E BEAM CALIBRATION l
5.1 Sweep range shall be sufficiently long so as to allow examination of the entire required volume as specified in 3.7. and shall be calibrated to provide a linear time / distance reference, i
r 5.2 When primary reference sensitivity is established from a notch, sweep range shall be calibrated from notch reflector (s). When primary reference sensitivity is established from a hole, sweep I
range shall be calibrated from hole or notch reflector (s).
l 5.3 Reference sensitivity shall be established by adjusting the peaked l
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- e c iier tio# reriecter to aos or rsh <r#ii scree-Height).
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f 5.3.1 Without moving the search unit from this peaked signal l
I location point, check vertical linearity of the system by I
decreasing signal amplitude 6dB, and then by an additional 6dB.
The resulting signal decrease must be within 32% to 48%
FSH and 16% to 24% FSH respectively.
5.3.2 If either signal falls outside of its' range, such controls j
as reject, clipping, damping, filtering, etc., shall be adjusted such that this check can be accomplished satisfactorily.
If adjustment of controls fails to provide a l
satisfactory check, the transducer and/or cable shall be l
l changed and calibration repeated.
If the system continues to f
I i
fall outside of the acceptable range, the instrument shall be j
i l
changed. Once adjustment of controls that affect linearity i
t is established, they shall remain fixed for the period of the l
P examinations.
v
^
5.4 Return the primary reference signal to 80% FSH and without changing the gain control, determine the peak indication j
f i
amplitudes from the remaining reflector positions which cover the examination range.
Construct a distance amplitude curve (DAC) on the screen by a curved line connecting each of the peaked points.
The DAC may be extrapolated at either end for a l
fI distance of 1/2 T.
i 5.5 Where the primary reference sens,itivity is established from a j
notch reflector, signals from the 1/4 T and 3/4 T holes may be used to establish slope of the OAC when 1/2 node examination is i
i used. Alternatively, the next two notch reflector positions
{
f may be used to extrapolate the OAC slope to cover the l
l examination range. Holes shall not be used to establish a DAC for examinations requiring a calibration block of less than.8" i
(])
thick.
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5.6 For primary loop RC piping, the slope of the DAC shall be l
establihised with the peaked signal from the 1/4 T hole set to 80% FSH and connecting the resulting peaks from the 1/2 T and i
3/4 T holes with a curved Ifne. With the peaked signal from l
i the 3/4 T hole adjusted to 80% FSH reference sensitivity, the DAC curve shall be drawn as a line parallel to the line established above. The line shall extend through the 80*.
reference point and through a vertical Ifne of the screen that represents a minimum of 11/4 T or 100% of sweep.
l 5.7 Reference points at 50% and 20% of DAC shall also be established on the screen by decreasing each DAC curve l
reference point by 6d8 and then by an' additional 8dB.
The resulting 50% and 20% points shall be connected by curved lines drawn on the screen. To minimize screen clutter, Ifnes connecting 50% poltets may be deleted, provided the points are clearly defined and are separated by not more than approximately one major screen division. When investigating
[
indications which may or are required to be recorded at the 50'.
l DAC level, a line connecting the applicable adjacent points must be considered or, alternatively, 2X reference sensitivity j
may be used, with the 1005 DAC curve then reresenting the 50%
l DAC Ifne.
j l
5.8 Documentation of data obtained during straight beam calibration shall be in accordance with OMW-ISI-101.
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l 6.0 SYSTEM CALIBRATION VERIFICATION I
l 6.1 Calibration shall be performed prior to the use of the system in the thickness range to be examined. Calibration verification shall be l
performed on at least two of the basic calibration reflectors at the l
end of examinations for which they are applicable, or every 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> l
l i
l during the examination, whichever is less, and when examination i
personnel performing the examination are changed.
h 6.2 If any point on the OAC curve has moved on the sweep line more than l
10% of the sweep division reading, the sweep range calibration shall j
i i
be corrected and the corrections shall be noted in the examination documentation.
If any recordable reflectors have been noted on data t
l sheets after the previously acceptable sweep range calibration, the f
questionable data shall be voided, the new calibration shall be j 'f
~
l T
documented, and areas relative to the voided data shall be j
l O re-examined.
v 6.3 If any point on the DAC curve has decreased 20% or 2 dB of its I
original amplitude, all data generated since the last calibration or calibration verification shall be marked void. A new calibration shall be performed and documentec and the voided examination areas shall be reexamined.
If any point on the DAC curve has increased I
more than 20% or 2 dB of its original amplitude, all recordable indications noted since the last acceptable calibration or calibration vertfication shall be reexamined using the corrected calibration data and their corrected recorded values shall be noted i
I on the data sheets.
i 1
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7.0 EDMlHATION 7.1 Examinations shall be conducted at a gain setting at least two times
(+ 6 dB) the reference level. When this is not feasible, the cause or reason shall be documented.
I 7.2 The rate of search unit movement shall not exceed six inches per second.
7.3 Each pass or scan of the transducer shall overlap at least 10% of f
the transducer (piezoelectric element) dimension perpendicular to the direction of the scan, i
l 7.4 The temperature of the examination surface shall be determined and related to the calibration block temperature. Record the temperature difference in tems of plus or minus degrees. The j
p temperature difference between the calibration block and the surface U
of the item to be examined shall not exceed 25'F.
7.5 Prior to the initial angle beam examination, the base metal through which the angle beams will travel shall be scanned with a straight beam search unit to detect laminar reflectors which might affect the l
interpretation of angle beam results and to detect laminar reflectors for acceptance. This examination is to be performed only l
during the preservice examination for welds in vessels and welds in piping made from plate material.
7.5.1 Scanning for laminar reflectors shall be performed at a gain setting that gives an initial back surface reflection of nominally 80% of full screen height at an indication-free location on the component.
I Hi et D l 8 8 i C ir.(
._J une_.1L_1984 -. _
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7.5.2 Alternatively, straight beam examinations for laminar reflectors may be conducted as an extension of the straight beam examination for planar reflectcrs (Ref. 4.0 and 2.6) if l
the planar reflector examinatin sensitivity is at least equal to that required in 7.5.1.
If laminar indicatins are detected by the alternate method, the indications shall be i
investigated at the sensitivity required in 7.5.1 and recorded in accordance with 7.5.4.
7.5.3. Areas containing laminar indications that causes either or both of the following shall be recorded.
I f
(a) All arcas where the indications are equal to or greater than the remaining back reflection.
I (b) All areas where one or more discontinuties produce a i
continuous total loss of back reflection accompanied by p
continuous indications in the same plane.
7.5.4 The boundary of each area producing recordable laminar j
indications shall be recorded at increments not exceeding 1 inch. The plotting shall be such that a plan view showing the size, shape, and location of the area relative to the circumferential zero reference, weld centerifne, and appropriate component surface is generated. The sweep location of indications which equal or exceed the criteria in 7.5.3 shall be recorded along with an identification of the I
criteria 7.5.3 (a) or 7.5.3 (b) that was exceeded.
7.5.5 Information recorded in 7.5.4 shall be used to determine if the lamination will interfere with the angle beam tests.
An j
indication determined to be non-interfering shall be recorded as a GENERAL INDICATION.
Indications determined to be t
Q interfering shall be recorded as an EXAMINATION LIMITATION.
V q
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_ June 13 1984 ncr 13 cf 24
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(~T 7.5.6 Where reflectors do interfere with angle beam examinations, the angle beam technique (including beam angle and sweep j
range) shall be reviewed and modified to the extent practical to achieve at least the minimum required coverage of the volume required to be examined, i
7.5.7 Documentation of data obtained during straight beam i
examinations for laminar reflectors shall be in accordance with DMW-ISI-101.
7.6 Examination of Yessel Welds 7.G 1 The volume of weld and adjacent base material that is to be examined shall be described in the Beaver Valley Unit 2 EPP.
The volumes defined shall be scanned by straight and angle beam techniques. Angle beams having nominal angles of 15 or G
60 degrees with respect to a line drawn perpendicular to the examination surface will normally be used.
7.6.2 The examination shall be performed from two sides of the weld where practicable or as a minimum from one side of the weld.
Welds that cannot be examined from at least one side using the angle beam technique shall be examined by another i
l volumetric method.
1 7.6.3 The examination volume shall be scanned with angle beam search units directed both at right angles to the weld axis and along the weld axis.
Each examination shall be performed in two directions, i.e., approaching the weld from opposite directions and parallel to the weld from opposite directions. Scanning directions shall be identifled by numbers as described in DMW-ISI-101.
O 64 e t t' t 6f t Clivt l_4 o f 24
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1978W:42A/060784 DMW-ISI-206 Rev. O i
l f) 7.6.4 The angle beam search unit shall be aimed at right angles to l
the weld axis with the search unit manipulated so that the i
i ultrasonic sound wave passes through all the weld metal when f
scanning for reflectors oriented parallel to the weld.
i 7.6.5 When scanning for reflectors oriented transverse to longitudinal and circumferential welds, the search unit shall
)
be aimed parallel to the axis of the weld.
The search unit
~
shall be manipulated so that the ultrasonic sound wave passes l'
through all the required examination volume. Scanning shall be done in two directions 180 degrees to each other to the l
l' extent possible.
7.6.6 Documentation of data obtained during angle beam examinatins shall ' e in accordance with DMW-ISI-101.
l J
i 1
7.7 Examination of Pipe Welds l
7.7.1 The identification of areas to be examined, a description of the reference system to be used, the scan directions, and f
description of calibration blocks to be used shall be included in the Beaver Valley Unit 2 EPP.
i 7.7.2 The search unit and beam angles specified in Table 1 for piping examinations shall be capable of detecting the calibration reflectors in the applicable calibration block I
i over the required angle beam path. Other angles may be used for evaluation of indications or where wall thickness or geometric configurations preclude use of the nor' mal angle.
l 7.7.3 The angle beam examination for reflectors parallel to the i
weld shall be performed' by at least a full-V path from one l
side or at least a*one-half V path from two sides of the weld O
where practical (Examination is limited to 1/2 V-Path for I
G I
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1 D^"
June 13.1984 ract 15_ o f 24 o^u Yd D 1014 H l. V 2183
h NSID 1978W:42A/060784 DMW-ISI-206 Rev. 0 l
p
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primary loop RC Piping). The scan pattern shall start with the search unit transmitting an angle beam perpendicular to j
and towards the weld. The search unit shall be moved towards and away from the weld such that a necessary amount of the l
beam path passes through the maximum accesible volume of weld and base metal to be examined. Concurrent with this scan, the search unit shall be angled right and left and progressively indexed along the length of the weld such that the whole scan pattern follows a "s.;w-tooth" pattern.
The
" pitch" of the "saw tooth"shall be such that the beam covers at least 10 percent of the area covered by the previous adjacent pass. The weld and required amount of adjacent base I
metal is to be fully scanned by this method. When necessary l
and practicable, examination shall be accomplished from both sides of the weld. This relates to examination directions 2 and 5 in DMW-ISI-101.
O 7.7.4 The angle beam examination for reflectors transverse to the weld shall be performed on the weld crown on a single scan path to examine the weld root by one-half V path in two I
directions along the weld.
I l
7.7.5 Documentation of data obtained during straight beam i
examinations for laminar reflectors shall be in accordance with DMW-ISI-101.
8.0 INTERPRETATION AHO INVESTIGATION OF INDICATIONS 8.1 The examiner shall investigate and interpret all indications that exceed 20% of the primary reference DAC curve to determine the source and cause of the indication.
Indications from or near the root of welds and clad surfaces may require the use of supplemental transducers, test frequencies, techniques, etc. to obtain additional 4
in formation.
If the use of such supplemental tests necessitates the I
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V use of any control that cannot be positively returned to its calibrated position (such as a potentiometer sweep, danping, or uncalibrated gain control), the primary reference calibration shall l
be verified before continuing normal examinations.
l 8.2 The examiner shall determine if the indications are valid or i
non-valid based on his evaluation of test conditions and data.
l V& lid indications are reflectors caused by flaws such as cracks, lack of penetration, lack of fusion, inclusions, and porosity.
Non-valid indications are reflectors from sources other than flaws such as scanning noise, grain structure, beam redirection, internal ifquid levels, clad interface, and geometric reflectors, 9.0 RECORD!Hb 0F IN0! CATIONS 9.1 Prior to recording indications that require dimensioning, the p
complete primary reference calibration, including If nearity and scribe / reference line checks shall be verified.
V 9.2 Valid flaw indications that produce a response equal to or exceeding 50% of the primary DAC curve shall be recorded and dimensioned in accordance with DMW-151-101 "Preservice and Intervice Examination Documenta tion." Surface indications caused by the clad interface or back wall reflectors shall not be considered valid flaw indications. All search unit posttion and locations dimensions shall be recorded to the nearest tenth of an inch.
All valid flaw fndications requiring dimensioning shall be considered recordable j
indications and noted as Rt.
9.2.1 For each valid flaw indication requiring dimensioning, peak emp11tude, sweep position, and search unit location and i
direction shall be recorded.
For indications that exceed the I
primary DAC curve amplitude, the minimum and maximum 1001 DAC i
A points shall also be noted.
V
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9.3 Valid flaw indications that produce a response less than 50% of the primry DAC curve shall be considered a non recordable indication and noted as NRI.
During preservice inspections, non recordable i
indications shall be noted on an Rt data sheet. As a minimum peak i
amplitude, sound beam direction, and scanning side thickness shall j
l be noted for NRI reflectors detected during a preservice inspection, t
i l
i 9.4 Non-valid indications that produce a response equal to or in excess of 50% of the primry DAC curve sha11 be considered non dimensioning Indications and noted as N01.
Non dimensioning indications shall be noted on an R1 data sheet. As a minimum, peak amplitude, indication
(
sweep posttion, search unf t location at peak amplitude, estfated l
1ength, sound beam direction, scanning side thickness, and i
examiner's interpretation of the cause of the reflector shall be i
noted.
1 9.5 Non valid indications that produce a response less than 50% of the primry DAC curve shall be considered as no indication and noted as f
N1. Evaluation of all recordable indications (RI) shall be j
perfomed in accordance with the requirements of the referenced ASMC i
Boiler and Pressure Vessel Code Section X1, Articles IWA-3000 and i
IW8 3000 and Appendf x !!!.
t l
10.0 POST [XAMINATION Cl, TAN!NG 10.1 Enemined areas shall be dry wiped to remve excessive wet couplant, 11.0 tvAMlH_Afl0N Rtsut.15 AN_0 00CtMENTAT10N 11.1 All data relative to calfbrations and examinations shall be recorded in accordance with DMW 151101, "Preservice and Inservice Examination Documentation".
1 l
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N810 1978W:42A/060784 DMW-ISI-206 Rev. 0 l ()
TABLE 1 ANGLE _ BEAM EXAMINATION
-n.
a T R A N S D U C E R (1)
NOMINAL l
i !
' MATERI AL MAX.
MINIMUM NOMINAL THICKNESS SIZE FREf). MHz_
ANblE f
'250" to.7A0" 1/4" 2.25 45'S A 60*S s
'751" is i.000" 1/2" 2.25 45'S A 60*S
', y-1.001" to 1.200" 3/4" 2.25 45*S A 60*S r
1.201" and (.reater 1"
2.25 45'S & 60*$
I t
Main _Coolan_t Piping Forged 1"
1.0 41*L/45'S I,
Centrifuge 11y Cest 1"
1.0 41*L s
h.
i s
ST_RA!(.HT_ BE AM EXAMINATION
$1ZE
,, /,
MIN. _ MAX.
MAX. FEO. MHz Mstn Coolant Piping 1"
1.25" 2.25 l
5.0 All other to 12" Dia, 1.4" 1/2" 12" Ola and greater 1.4" 1"
5.0 MTESI (1)
Other transducers may be used where metallurgical characteristic or geometry impede effective use of the above l'sted angle beams or frequencies.
Site is the element viewed from the side and shall not be increased.
(D U
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I TABLE 2 1/4 T = 1/8 Node = 1/8V 1 1/4 T = 5/8 Node = 5/8 y j
1/2 T = 2/8 Node = 1/4 Y l 1/2 T = 6/8 Node = 3/4 V i
3/4 T = 3/8 Node = 1/4 V 13/4 T = 7/8 Node = 7/8 Y j
f 1 T = 4/6 Hode = 1/2 V 2 T = 8/8 Node =
1Y l
ETC.
I I
i SWEEP RANGE CALIBRATION FOR SWP. RANGE CAL. OF:
LAST LE6 % SWP. i.0 CATION ())
MIN MAX
^
(D V
1T 50 75 i
2T 50 75 3T 50 75 j
l 4T 50 75 l
l (1)
Applicable for "T" calibration point from notch reflector, or last "T" point as extrapolated or extended from calibration hole reflectors.
l Maximum last leg location indicated is based on piping calibration block l
i at minimum "T" and of volume to be examined at maximum "T".
Last leg positions indicated above may be changed if thickness of calibration block and the examination area are determined to be other than this l
basis. Calculate for maximum last leg position as follows.
100 + EXAM. VOL. "T" = MAX. %SWP. LOCATION FOR LAST LEG.
i CAL. BLOCK "T" O
l Ar siSE D i
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DMW-ISI-206 Rev. 0 p
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IT Cal.,' Crown Flat i..
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{ Coverage from Side 1 is 1035 i
s, sM.,..;s.,(v s[
Sidc 2 Exam.
'1 s
Not Required s
,e s
lY-,.4T Cal.
~1 l
l tion or maximum access.
~' Broken beam MExam. staft. Solid beam = Exam, comp e i
.i
' All Beam Angles - 45 c'
See Figure 2 for Commentary j
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1 s
d q t
4 4
s i
l s
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t
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,FIGilRE 1
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T NSID 1978W:42A/060784 DMW-ISI-206 Rev. 0 l
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Illustrative Only SIDE 1 SIDE 2 1'ia'W
/
/ Mir-k
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\\'%J
+
E7
/
i 4
' hhdd1N w
/%-2McWA '
4 ;
i IT Cal., Crown Flat & Flush p =T
/
/
k k
\\
/
s ' JSSS>ml VdPSMR '
'lT Cal., Crown Obstructing
! Crown Obstructing i
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kW M
Nw
- s. '
- ' v 'h:MM$d /y s
- MGMil' l
2T Cal., Crown Obstructing i.
/
/-
N
. Coverage from Side 1 is 100%
4 4
's ggy Side 2 Exam.
(
s.
Not Recu1 red 3T Cal.
Broken ceam = Exam.' stirt."SoIid beam = Exam. completion or maximum access.
~
~
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ALL BEAM A';GLES-60 Figures and views illustrate extent of examir.ation volume coverage that is obtained based on parameters cepicted. Actual parameters exisiting for or during each examination alter significantly the depicted coverage.
Key parameters depicted are:
- 1. Search unit is essentially minimum size
- 2. Nominal beam angle (in the part) is achieved and maintained l
- 3. Beam has zero spread i
- 4. Beams reflect from parallel planes equal to T at I.D. and crown areas i.
- 5. Width of obstructing crown is equal to T l
- 6. Scan access is available on both sides.
Where weld crown is not obstructing, 2T cal. range or greater can satis'y required coverage from one side.
Cal. range and transducer or angle shall be such that examination and data required (see 2.5) can be satisfied. Maximum extent of required coverage achieved during examination is, that volume that has been
" cross-hatched" by calibrated beams, as perceived solely by the examiner.
i FIGURE 2 N#U El F E C NE 22 of 24
^"
oan June 13, 1984 rac.t N%iO 1014 H E V 2 I SJ
W NSID 1978W:42A/060784 DiiW-ISI-206 Rev. O i
7
,Y
?
I Illustrative Only l
SIDE 1 SIDE 2 l
l i
1 d 46 i
M~*I A
N_
N N'
x.
f::SR:i:i?M7; h, Mw]
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t k
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1T Cal., Crown Flat & Flush
.v I
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k A
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s 1T Cal., Crown Destructing Crown Obstructing k
k l
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h5
.k 2T Cal., Crown Obstructing I
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kNN \\
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3T Cal.
A'i A
if'hf's{U.}
Coverage from Side 1 is 100 i
g
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w..N..:x. s
.i : -
s 4T Cal.
Side 2 Exam.
i flot Required i
Broxen beam = Exam. start. Solid ::eam = Exam. completion or maxim.m access.
All Beam Angles - 45 See Figure 2 for Commentary i
i b)
FIGURE 3 3
i Rf VISED E6FECtwE
_j Datt June 13. 1984 rac,e 23 of 24 o^'t NN'O 1014 h t v 2 I e 1
W NSID 1978W:42A/060784 DMW-ISI-206 Rev. 0
,., I e(;
Illustrative Only SIDE 1 SIDE 2
.g M
7 I
/1 hs N
t x,
qww y;pwy j
k'3" :l _ M__.
h_.
I N
N s..
IT Cal., Crown Flat & Flush dm.r a
/
A W
k l
_____h,/
'N. \\
IT Cal., Crown Obstructing Crown Obstructing
/1
.h
- _A N
'\\,/
/
2T Cal., Crown Obstructing
/1 A-f "'s
[
Coverage from Side 1 is 100*
Side 2 Exam.
's
()
't m
Not Required l
3T Cal.
Broken beam = Exam. start. Solid beam = Exam completion or maximum access.
I 1
I Figures and views illustrate extent of examination volume coverage that is obtained based on carameters cecicted. Actual parameters exisiting for or during eacn examination alter significantly the depicted coverage.
Key parameters depicted are:
- 1. Search unit is essentially minimum size l
- 2. Nominal beam angle (in the part) is achieved and maintained
- 3. Beam has :ero scread
- 4. Beams reflect from parallel planes equal to T at I.D. and crown areas
- 5. Width of obstructing crown is equal to T
- 6. Scan actess is available on both sides.
Where weld crewn is not obstructing, 2T cal. range or greater' can satisfy required coverage from one side.
(
Cal. range and transducer or angle shall be such that examination and t
I data required (see 2.5) can be satisfied. Maximum extent of retuirec coverage achieved during examination is, that volume that has been
" cross-hatched" Dy calibrated-beams, as perceived solely by the examiner.
l i O j
i U
FIGURE 4 1
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R! v:SE D E f f E CTis[
_j ract 24 of 24 o^1t June 13.1984
E NSID 1014 H L V.t
- -. -